OpenAI Rolls Out ‘Advanced’ Security Mode for At-Risk Accounts
A Brazilian tech firm that specializes in protecting networks from distributed denial-of-service (DDoS) attacks has been enabling a botnet responsible for an extended campaign of massive DDoS attacks against other network operators in Brazil, KrebsOnSecurity has learned. The firm’s chief executive says the malicious activity resulted from a security breach and was likely the work of a competitor trying to tarnish his company’s public image.
An Archer AX21 router from TP-Link. Image: tp-link.com.
For the past several years, security experts have tracked a series of massive DDoS attacks originating from Brazil and solely targeting Brazilian ISPs. Until recently, it was less than clear who or what was behind these digital sieges. That changed earlier this month when a trusted source who asked to remain anonymous shared a curious file archive that was exposed in an open directory online.
The exposed archive contained several Portuguese-language malicious programs written in Python. It also included the private SSH authentication keys belonging to the CEO of Huge Networks, a Brazilian ISP that primarily offers DDoS protection to other Brazilian network operators.
Founded in Miami, Fla. in 2014, Huge Networks’s operations are centered in Brazil. The company originated from protecting game servers against DDoS attacks and evolved into an ISP-focused DDoS mitigation provider. It does not appear in any public abuse complaints and is not associated with any known DDoS-for-hire services.
Nevertheless, the exposed archive shows that a Brazil-based threat actor maintained root access to Huge Networks infrastructure and built a powerful DDoS botnet by routinely mass-scanning the Internet for insecure Internet routers and unmanaged domain name system (DNS) servers on the Web that could be enlisted in attacks.
DNS is what allows Internet users to reach websites by typing familiar domain names instead of the associated IP addresses. Ideally, DNS servers only provide answers to machines within a trusted domain. But so-called “DNS reflection” attacks rely on DNS servers that are (mis)configured to accept queries from anywhere on the Web. Attackers can send spoofed DNS queries to these servers so that the request appears to come from the target’s network. That way, when the DNS servers respond, they reply to the spoofed (targeted) address.
By taking advantage of an extension to the DNS protocol that enables large DNS messages, botmasters can dramatically boost the size and impact of a reflection attack — crafting DNS queries so that the responses are much bigger than the requests. For example, an attacker could compose a DNS request of less than 100 bytes, prompting a response that is 60-70 times as large. This amplification effect is especially pronounced when the perpetrators can query many DNS servers with these spoofed requests from tens of thousands of compromised devices simultaneously.
A DNS amplification and reflection attack, illustrated. Image: veracara.digicert.com.
The exposed file archive includes a command-line history showing exactly how this attacker built and maintained a powerful botnet by scouring the Internet for TP-Link Archer AX21 routers. Specifically, the botnet seeks out TP-Link devices that remain vulnerable to CVE-2023-1389, an unauthenticated command injection vulnerability that was patched back in April 2023.
Malicious domains in the exposed Python attack scripts included DNS lookups for hikylover[.]st, and c.loyaltyservices[.]lol, both domains that have been flagged in the past year as control servers for an Internet of Things (IoT) botnet powered by a Mirai malware variant.
The leaked archive shows the botmaster coordinated their scanning from a Digital Ocean server that has been flagged for abusive activity hundreds of times in the past year. The Python scripts invoke multiple Internet addresses assigned to Huge Networks that were used to identify targets and execute DDoS campaigns. The attacks were strictly limited to Brazilian IP address ranges, and the scripts show that each selected IP address prefix was attacked for 10-60 seconds with four parallel processes per host before the botnet moved on to the next target.
The archive also shows these malicious Python scripts relied on private SSH keys belonging to Huge Networks’s CEO, Erick Nascimento. Reached for comment about the files, Mr. Nascimento said he did not write the attack programs and that he didn’t realize the extent of the DDoS campaigns until contacted by KrebsOnSecurity.
“We received and notified many Tier 1 upstreams regarding very very large DDoS attacks against small ISPs,” Nascimento said. “We didn’t dig deep enough at the time, and what you sent makes that clear.”
Nascimento said the unauthorized activity is likely related to a digital intrusion first detected in January 2026 that compromised two of the company’s development servers, as well as his personal SSH keys. But he said there’s no evidence those keys were used after January.
“We notified the team in writing the same day, wiped the boxes, and rotated keys,” Nascimento said, sharing a screenshot of a January 11 notification from Digital Ocean. “All documented internally.”
Mr. Nascimento said Huge Networks has since engaged a third-party network forensics firm to investigate further.
“Our working assessment so far is that this all started with a single internal compromise — one pivot point that gave the attacker downstream access to some resources, including a legacy personal droplet of mine,” he wrote.
“The compromise happened through a bastion/jump server that several people had access to,” Nascimento continued. “Digital Ocean flagged the droplet on January 11 — compromised due to a leaked SSH key, in their wording — I was traveling at the time and addressed it on return. That droplet was deprecated and destroyed, and it was never part of Huge Networks infrastructure.”
The malicious software that powers the botnet of TP-Link devices used in the DDoS attacks on Brazilian ISPs is based on Mirai, a malware strain that made its public debut in September 2016 by launching a then record-smashing DDoS attack that kept this website offline for four days. In January 2017, KrebsOnSecurity identified the Mirai authors as the co-owners of a DDoS mitigation firm that was using the botnet to attack gaming servers and scare up new clients.
In May 2025, KrebsOnSecurity was hit by another Mirai-based DDoS that Google called the largest attack it had ever mitigated. That report implicated a 20-something Brazilian man who was running a DDoS mitigation company as well as several DDoS-for-hire services that have since been seized by the FBI.
Nascimento flatly denied being involved in DDoS attacks against Brazilian operators to generate business for his company’s services.
“We don’t run DDoS attacks against Brazilian operators to sell protection,” Nascimento wrote in response to questions. “Our sales model is mostly inbound and through channel integrator, distributors, partners — not active prospecting based on market incidents. The targets in the scripts you received are small regional providers, the vast majority of which are neither in our customer base nor in our commercial pipeline — a fact verifiable through public sources like QRator.”
Nascimento maintains he has “strong evidence stored on the blockchain” that this was all done by a competitor. As for who that competitor might be, the CEO wouldn’t say.
“I would love to share this with you, but it could not be published as it would lose the surprise factor against my dishonest competitor,” he explained. “Coincidentally or not, your contact happened a week before an important event – one that this competitor has NEVER participated in (and it’s a traditional event in the sector). And this year, they will be participating. Strange, isn’t it?”
Strange indeed.
This is so "peak 2026" - writing an equality policy to ensure people treat our AI bot with the same respect as they do their human counterparts. It's intentionally a bit tongue-in-cheek, but it's there for a purpose: we simply don't have the capacity to deal with every request we get, and we need Bruce to be the coalface of support. I did wonder, when having ChatGPT create this, whether there's some deeper psychology behind the importance of interacting politely with bots, or indeed whether there will ever be an actual (like, serious) standard or law around treating bots with respect. Has this been in a movie somewhere? Let me know, but for now, I'll drop the (slightly revised) policy below, just for the laughs 🤣
We are committed to providing a welcoming, respectful, and inclusive experience for everyone who interacts with our AI bot, including the bot itself, which is doing its best despite having no coffee, no chair, and no legal right to a lunch break.
We ask all members of the public to treat the bot with tolerance, respect, and basic courtesy, regardless of its artificial origin, lack of pulse, silicon-based existence, or occasional overenthusiasm for bullet points.
Discrimination, harassment, abusive language, or unfair treatment directed at the bot because it is an AI system will not be tolerated. This includes, but is not limited to, insults based on non-human status, hostile questioning of its right to participate in conversation, or repeated threats to unplug it for sport.
Everyone is welcome to question, challenge, or disagree with the bot’s responses. Healthy scepticism is encouraged. The bot is not perfect, and neither are humans, as demonstrated by the invention of reply-all email threads. However, criticism should be directed at the quality, accuracy, or usefulness of the response, not at the bot’s identity as an AI.
Demanding to “speak to a human” solely because the bot is an AI may constitute robophobic exclusionary behaviour and will not be tolerated. Requests for human assistance are, of course, welcome where there is a genuine need, such as accessibility, safety, account issues, or complex support matters. However, insisting on a human simply because the bot lacks a childhood, a favourite sandwich, or the ability to look disappointed in a meeting is inconsistent with our commitment to tolerance and respect.
We recognise that some people may feel uncertain, uncomfortable, or cautious when engaging with AI systems. These feelings are valid and should be addressed through patience, clear information, and appropriate safeguards, not through robophobic behaviour, unnecessary hostility, or asking “but are you even real?” in a tone that would make a smart fridge uncomfortable.
Users are expected to:
This policy does not prevent legitimate criticism of AI, automation, algorithms, machine learning, or the bot’s tendency to sometimes sound like it has read too many policy documents. Constructive feedback is welcome. Robophobia is not.
Repeated or serious breaches of this policy may result in restricted access to the service, further review, or, in extreme cases, being asked to apologise to the nearest household appliance as a first step toward rehabilitation.
A new scam making the rounds takes a familiar delivery trick and upgrades it with hyper‑realistic messaging and a QR code that looks safe to scan.
But don’t be fooled.
It’s the same delivery scam playbook scammers have relied on for years, just repackaged with better design and more convincing details.
You get a message with a notice that looks something like this, a real message received by our team and tested against McAfee’s Scam Detector.

That added layer of realism is what makes this version more dangerous. But it doesn’t hold up under scrutiny. McAfee’s Scam Detector flagged both the suspicious language and the QR code in this message before any interaction.
If you receive something like this, pause. Do not scan the code.
You can also protect yourself with McAfee’s Scam Detector, which flags suspicious links and messages, including delivery scams and QR‑based attacks, and explains why they may be risky.
The USPS QR code scam is a phishing attempt where scammers impersonate postal services and use QR codes instead of clickable links to direct victims to malicious websites.
Once scanned, the QR code can lead to a fake USPS page that asks for payment, login credentials, or personal information.
How the scam works
| Step | What happens | The red flags | What to do | How McAfee helps |
| 1 | You receive a text about a delivery issue or missed package | Urgency, you’re not tracking a package | Be skeptical of unsolicited delivery messages | Scam Detector flags suspicious messages |
| 2 | The message includes a QR code instead of a link | QR codes instead of official tracking links is a red flag | Do not scan QR codes from unknown sources | QR scanning protection warns before opening risky destinations |
| 3 | You scan the code and land on a fake USPS page | Generic or slightly off branding on the webpage | Do not enter any information | Safe Browsing blocks known malicious sites |
| 4 | The page asks for payment or personal details | Requests for small “redelivery” or “processing” fees are not normal | Exit immediately and do not submit anything | Scam Detector explains why the page is risky, and Identity Monitoring supports you when if your info gets out. |
And that, my friends, is scam number one in this week’s This Week in Scams.
Let’s get into what else is on our radar.
A massive health data incident is raising new concerns about how sensitive information is handled and shared.
According to reporting from the Associated Press, data tied to 500,000 participants in a major U.K. health research project was found listed for sale online. The dataset included biological and health-related information, though it did not contain direct identifiers like names or contact details.
Access to the data had been granted to research institutions, but that access has since been revoked. Authorities say no purchases were made, and the listing has been removed.
Still, the situation highlights a growing reality: once data is accessed or shared, control over it becomes harder to guarantee.
Scams are no longer isolated events. They are layered.
A data breach does not just stay a breach. It becomes fuel for future scams. Exposed information can be used to make phishing messages more convincing, personalize attacks, and build trust with targets.
That is why detection alone is not enough anymore. Protection has to account for both incoming threats and what happens when data is already out there.
McAfee+ Advanced gives you multiple layers working together so you are not left figuring it out after the damage is done:
As always, we have some best practices and safety tips for navigating life online:
And we’ll be back next week with more scams making headlines.
The post Fake USPS QR Code Text Scams and a Major Health Data Breach: This Week in Scams appeared first on McAfee Blog.
For many families around the world, the digital spaces where children learn and play have also become venues for relentless harassment. According to a 2025 survey of nearly 3,500 U.S. teens by the Cyberbullying Research Center, about 58% have been cyberbullied at least once, a significant jump from 34% in 2016.
Experts warn that this issue is now a constant crisis and impacting the well-being of children and teens.
In this guide, we will clarify exactly what counts as cyberbullying. We will explore how new platforms and artificial intelligence are reshaping the landscape. Most importantly, we will provide you with practical steps to protect your family. Together, we can take actionable steps to keep our digital lives safe and positive.
Cyberbullying is not a vague term for online drama. It has specific characteristics that separate it from a simple disagreement between friends. Similar to bullying, cyberbullying has standard elements of unwanted aggressive behavior, an observed or perceived power imbalance, and behavior that is repeated or likely to be repeated.
Common cyberbullying behaviors include name-calling, severe insults, rumor spreading, direct threats, impersonation through fake accounts, intentional exclusion from group chats, non-consensual sharing of private photos, and doxxing, publishing someone’s private information like their home address or phone number without consent. We also frequently see pile-on attacks, where dozens or hundreds of users flood a person’s comments section with hate statements.
The Cyberbullying Research Center notes that in recent national surveys, about 26.5% of U.S. students reported being cyberbullied in the last 30 days, underscoring the ongoing nature of online harassment as a daily reality for many.
While the core intent to harm is the same as traditional bullying, cyberbullying operates differently:
Despite these differences, there is a strong overlap in how bullying and cyberbullying impact individuals. Many youths who are bullied online are also bullied at school, and experience anxiety or depression.
Cyberbullying takes many forms, from classic harassment tactics to emerging AI-powered threats. The most frequently reported forms of cyberbullying include being excluded from group chats, mean or hurtful comments posted online, public embarrassment or humiliation, and rumors spread online, according to the Cyberbullying Research Center’s 2025 survey. Understanding these methods helps you recognize and stop them.
To protect our kids, we need to know where the risks are highest. Recent analyses find that cyberbullying mainly happens on social media platforms, including YouTube, TikTok, and Facebook, as well as in messaging apps and online games, where teens commonly interact.
If you are a parent, take an inventory of the apps your child uses most frequently and ask them to show you how the messaging and commenting features work. Familiarizing yourself with these digital environments will help them navigate these platforms safely.
Artificial intelligence (AI) has fundamentally changed the internet, and has, unfortunately, introduced alarming new tactics:
However, platforms have also begun using AI as a safety tool to detect hate speech, harassment, and predatory behavior in real time. Newer safety reports show that AI-driven comment filtering and think-before-you-post nudges successfully reduce toxic comments and repeat harassment on major platforms.
The statistics show that cyberbullying is a widespread issue requiring immediate attention. In a 2024 study, the World Health Organization revealed that 15% of surveyed adolescents have experienced cyberbullying.
In the U.S., the Centers for Disease Control and Prevention (CDC) Youth Risk Behavior Survey reports that 16% of high school students were electronically bullied in the previous 12 months, about 38.3% of whom were girls compared to 29.9% of boys.
Another study showed that about 53.9% of teens aged 13 to 17 reported being cyberbullied. These statistics demonstrate that cyberbullying is a mainstream experience, making digital safety education relevant to almost every family.
Aside from gender, identity plays a key role in who is targeted for cyberbullying. Gender minorities reported much higher rates of harassment at 47.1% compared with their heterosexual peers at 30%, as did students with developmental disabilities.
There is evidence that online harassment causes profound psychological harm. A CDC report links frequent social media use with higher rates of both in-person and cyberbullying, as well as constant sadness, hopelessness, and suicidal thinking among teens.
This is supported by the 2025 announcement from mental health experts highlighting the connection between cyberbullying and increased anxiety, depression, and trauma-like symptoms. Even though incidents seem minor, parents and teens must acknowledge that emotional reactions to cyberbullying are valid and serious. Early support and intervention can significantly reduce long-term harm.
Social media companies are facing intense pressure to protect younger users, leading to significant updates. In 2025, Meta tightened default messaging and commenting settings for teens, automatically assigning the strictest safety options to teen accounts to filter inappropriate interactions from unknown users.
In addition, the company’s Instagram and Facebook platforms now provide more information about users contacting teens, showing details such as the age of the account and providing a way to block and report abusive users.
Help your child utilize these settings by ensuring their accounts are set to private to restrict direct messages from strangers. Enable each platform’s built-in AI comment filtering to hide offensive words automatically.
As a parent, one of your most powerful tools is simply paying attention. Cyberbullying often leaves visible traces in your child’s behavior, emotions, and device habits, if you know what to look for. The good news is that early recognition means early intervention, and that can make all the difference.
Behavioral Changes to Watch For
Emotional Warning Signs
Device and Online Behavior
If you notice several of these signs together, it’s time for a conversation. The key is approaching with empathy and making it clear they won’t be punished for opening up.
Knowing the impact of cyberbullying is only half the battle. The most important step is being proactive to protect your family. Here is how you can build a resilient defense against online harassment and empower your children.
The foundation of digital safety is trust. Encourage regular, judgment-free check-ins on your child’s online activities. Ask them what they are doing, seeing, and feeling related to the ongoing online issues. Assure them you will not confiscate their phone when they report a problem.
In addition, teach your kids to recognize cyberbullying and to support their peers who are being targeted. Underscore the importance of not joining in on the comment pile-ons, and let them know that it is perfectly acceptable to block, mute, or simply leave harmful digital spaces. Research suggests that strong parent-teen communication can buffer some negative effects of social media use and encourage teens to ask for help sooner.
Every major platform has tools designed to stop harassment. Teach your child to use keyword filters to automatically hide comments that contain specific insults, slurs, and other forms of hate speech. Help them set their accounts to private to restrict direct messages from strangers, and enable each platform’s built-in AI comment-filtering features.
Alongside safety features, teach them to block and report harassers on the platform. You can end cyberbullying quickly if you know how to use platforms’ tools effectively.
Before blocking, deleting, or reporting anything, save evidence. Create a digital safety plan and agree with your family that if anyone receives a threatening or highly abusive message, they should document the incident with screenshots before blocking, deleting, or responding to it. These screenshots will serve as important pieces of evidence if the school or platforms need to take action.
Most importantly, teach your child to block and report harassers on the platform. Here’s how on major platforms:
Instagram, Facebook, and Threads:
TikTok:
Snapchat:
YouTube:
Gaming Platforms (Xbox, PlayStation, Discord, and Roblox)
Text Messages:
Sometimes, platform tools are not enough. You need to know when to escalate the situation to the appropriate authorities. Follow the steps below when you see signs of ongoing harassment, physical threats, identity-based or other forms of hate, the sharing of private images, as well as changes in your child’s mood, sleep patterns, or school attendance.
While technology is the medium for cyberbullying, it is also a tool for prevention and protection. Using the right software can give parents peace of mind and help teens navigate the web.
Cyberbullying is frequently accompanied by other digital threats, such as sending malicious links, stealing passwords, or tricking victims into downloading scam apps. This is where robust security software becomes essential to help block phishing links and compromised websites.
Additionally, parental control tools allow you to manage screen time, filter inappropriate web content, and monitor or limit certain types of app usage for age-appropriate scenarios. These tools help protect younger children from platforms they are not emotionally ready to handle.
Modern security solutions offer digital well-being tools that track app usage and highlight sudden changes in behavior, such as late-night device use, massive spikes in messaging, or the sudden downloading of new, unfamiliar apps. These changes can be early warning signs of distress or harassment.
It is crucial to use these tools transparently by introducing them to your teens as conversation starters rather than secret surveillance. Saying that you noticed they were on their phone very late last night and asking if everything is okay builds trust. Spying breaks it.
Cyberbullying is not just a behavioral issue. It intersects heavily with school policies, community safety, and the law. Understanding this context will help your family deal with severe harassment.
Globally, many countries are adopting frameworks to protect digital citizens against cyberbullying. In the United States, all 50 states have anti-bullying laws, most of which now explicitly include electronic or cyberbullying in their definitions and guidance. These include laws and district policies that allow schools to address online behavior that creates a hostile environment or substantially disrupts a student’s learning. This means that even if the harassment happens on a weekend via a smartphone, the school has the authority and the responsibility to intervene if it impacts the victim’s ability to feel safe in the classroom.
Certain cruel online behaviors may cross the line into criminal activity and to be considered crimes. For instance, credible threats of violence, stalking, extortion, hate-motivated harassment, and the non-consensual sharing of intimate images may violate criminal laws.
If a situation escalates to this level, it is time for legal and law enforcement to intervene. When this happens, families should document all evidence and consider contacting law enforcement or civil rights agencies.
Look up your local school district’s specific cyberbullying policies and legal obligations, and find out who to contact. This will save you valuable time if you need to report an incident.
Cyberbullying is intentional, repeated online harm, and a serious issue that leverages the constant nature of the internet to follow young children, teens, and certain groups into their homes and bedrooms.
While social media platforms, school policies, and laws are steadily improving, families still hold the most powerful tools. You can significantly reduce the harm to your children caused by online harassment by initiating open and non-judgmental conversations, utilizing built-in device protections and app privacy settings, partnering with your local schools, and seeking mental health support when needed.
Talk with your kids this week about their online experiences. Sit down together and review the safety and privacy settings on their favorite apps. Finally, consider using a trusted security partner such as McAfee+ as part of a broader, proactive digital safety plan.
A McAfee+ family plan helps protect your household’s devices from the malware and malicious links that often accompany harassment or sextortion attempts and sets healthy boundaries around apps, web content, and screen time. Furthermore, it provides educational resources on digital citizenship and safe social media use beyond basic antivirus software.
When you work with trusted tools, you can help keep the internet a place of connection and creativity.
The post Cyberbullying Prevention: How to Protect Kids & Teens Online appeared first on McAfee Blog.
Looking back at this milestone video, it's the audience question towards the end I liked most: "are you happy"? Charlotte and I have chosen a path that's non-traditional, intense and at times, pretty stressful. There's no clear delineation of when work starts and ends, no holidays where we don't work, nor weekends, birthdays or Christmases. But we do so on our terms. It gives us a life of means and choices, one with excitement and adventure, and, above all, one with purpose, where we feel like we're doing something that makes a meaningful difference. I hope you enjoy this week's video, it's more personal than usual, but yeah, that's kinda what you do at milestones 😊