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January 30, 2023

How Vidar Malware Spreads via Malvertising on Google

Discover how Vidar info stealer malware is distributed through malvertising on Google and the risks it poses to users and organizations.
Inside the SOC
Darktrace cyber analysts are world-class experts in threat intelligence, threat hunting and incident response, and provide 24/7 SOC support to thousands of Darktrace customers around the globe. Inside the SOC is exclusively authored by these experts, providing analysis of cyber incidents and threat trends, based on real-world experience in the field.
Written by
Roberto Martinez
Devalyst, Threat Researcher
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30
Jan 2023

In recent weeks, security researchers and cyber security vendors have noted an increase in malvertising campaigns on Google, aimed at infiltrating info-stealer malware into the systems of unsuspecting victims, as reported in sources [1] [2]. It has been observed that when individuals search for popular tools such as Notepad++, Zoom, AnyDesk, Foxit, Photoshop, and others on Google, they may encounter ads that redirect them to malicious sites. This report aims to provide a high-level analysis of one such campaign, specifically focusing on the delivery of the Vidar Info-stealer malware.

Campaign Details

On the 25th of January 2023, Darktrace researchers observed that the advertisement depicted in Figure 1 was being displayed on Google when searching for the term "Notepad++" from within the United States.

Figure 1: Google Ad shown when searching for Notepad++

As can be seen in Figure 2, the advertisement in question had no visible information regarding its publisher.

Figure 2: Advertisement information

Clicking on the advertisement would direct potential victims to the website notepadplusplus.site, which had been registered on the 4th of January and is hosted on IP address 37[.]140[.]192[.]11. Upon selecting the desired version of the software, a download button is presented to the visitor.

Figure 3: Malicious site with fake Notepad++
Figure 4: Malicious site with fake Notepad++

When clicking on Download, regardless of the version selected, the traffic is then redirected to hxxps://download-notepad-plus-plus[.]duckdns[.]org/, and a .zip file with name “npp.Installer.x64.zip” is downloaded.

Figure 5: Traffic redirection

Upon extraction, the file "npp.Installer.x64.exe" has a file size of 684.1 megabytes. The significant size is attributed to the inclusion of an excessive number of null bytes, which serve to prevent the file from being scanned by some Antivirus and uploaded to malware analysis platforms such as VirusTotal, which has a file size limit of 650 megabytes.

Figure 6: npp.Installer.x64.zip

Initially, padding was incorporated at the end of the executable, enabling individuals to remove it while maintaining a fully functional file. However, in the sample analysed in this report, padding was inserted into the binary's central region. This method renders the removal of padding more challenging, as simply deleting the zeroes would compromise the integrity of the file and impede its functionality during dynamic analysis.

Figure 7: Beginning of null bytes padding

Figure 8: End of null bytes padding

After execution, the malware promptly establishes a connection to a Telegram channel to acquire its command and control (C2) address, specifically hxxp://95[.]217[.]16[.]127. If Telegram is not available, the malware will then attempt to connect to a profile on video game platform Steam, in which case the C2 address was hxxp://157[.]90.148[.]112/ at the time of initial analysis and hxxp://116[.]203[.]6[.]107 later. It then proceeds to check-in and obtain its configuration file and subsequently downloads get.zip, an archive containing several legitimate DLL libraries, which are utilized to extract information and saved passwords from various applications and browsers. Through traffic analysis, the method by which the malware obtains its Command and Control (C2) location, and analysis of the configuration obtained, it can be assessed with high confidence that the malware in question is the info-stealer known as Vidar. Vidar has been extensively covered by various cybersecurity organizations. Further information regarding this info-stealer and its origins can be found here[3].

Figure 9: Telegram traffic
Figure 10: Telegram channel containing the location of Vidar’s C2 address
Figure 11: Steam profile containing the location of Vidar’s C2 address
Figure 12: Vidar C2 traffic
Figure 13: Vidar configuration obtained from the C2
Figure 14: Libraries downloaded by Vidar

Campaign ID 827

The domain download-notepad-plus-plus.duckdns.org, from which the malware is distributed, resolves to the IP address 185[.]163[.]204[.]10. Using passive DNS, it has been determined that multiple domains also resolve to this IP address. This information suggests that the threat group responsible for this campaign is also utilizing advertising to target individuals searching for specific applications besides Notepad++, including:

  • OBS Studio
  • Davinci Resolve
  • Sqlite
  • Rufus
  • Krita

Furthermore, it has been observed that all the malware samples obtained in this investigation connect to the same Telegram channel, utilize the same two Command and Control IP addresses, and share the same campaign ID of "827".

Conclusion 

The recent proliferation of malvertising campaigns, which are employed by cyber-criminals to distribute malware, has become a significant cause for concern. Unlike more traditional infection vectors, such as email, malvertising is harder to protect against. Furthermore, the use of padding techniques to inflate the size of malware payloads can make detection and analysis more challenging.

To mitigate the risk of falling victim to such attacks, it is recommended to exercise caution when interacting with online advertisements. Specifically, it is advisable to avoid clicking on any advertisements while searching for free software on search engines and to instead download programs directly from official sources. This approach can reduce the likelihood of inadvertently downloading malware from untrusted sources. 

Another effective measure to counteract the threat of malicious ads is the utilization of ad-blocker software. The implementation of an ad-blocker can provide an additional layer of protection against malvertising campaigns and enhance overall cybersecurity.

Appendices

Indicators of Compromise

Filename        npp.Installer.x64.zip

SHA256 Hash  7DFD1D4FE925F802513FEA5556DE53706D9D8172BFA207D0F8AAB3CEF46424E8

Filename         npp.Installer.x64.exe

SHA256 Hash  368008b450397c837f0b9c260093935c5cef56646e16a375ba7c47fea5562bfd

Filename         rufus-3.21.zip

SHA256 Hash  75db4f8187abf49376a6ff3de0163b2d708d72948ea4b3d5645b86a0e41af084

Filename         rufus-3.21.exe

SHA256 Hash  169603a5b5d23dc2f02dc0f88a73dcdd08a5c62d12203fb53a3f43998c04bb41

Filename         DaVinci_Resolve_18.1.2_Windows.zip

SHA256 Hash  73f00e3b3ab01f4d5de42790f9ab12474114abe10cd5104f623aef9029c15b1e

Filename         DaVinci_Resolve_18.1.2_Windows.exe

SHA256 Hash  169603a5b5d23dc2f02dc0f88a73dcdd08a5c62d12203fb53a3f43998c04bb41

Filename         krita-x64-5.1.5-setup.zip

SHA256 Hash  85eb4b0e3922312d88ca046d89909fba078943aea3b469d82655a253e0d3ac67

Filename         krita-x64-5.1.5-setup.exe

SHA256 Hash  169603a5b5d23dc2f02dc0f88a73dcdd08a5c62d12203fb53a3f43998c04bb41

URL     hxxp://95[.]217[.]16[.]127/827  
URL     hxxp://95[.]217[.]16[.]127/get[.]zip  
URL     hxxp://95[.]217[.]16[.]127/  
URL     hxxp://157[.]90[.]148[.]112/827  
URL     hxxp://157[.]90[.]148[.]112/  
URL     hxxp://157[.]90[.]148[.]112/get[.]zip  
URL     hxxp://116[.]203[.]6[.]107/  
Domain  notepadplusplus[.]site  
Domain  download-notepad-plus-plus[.]duckdns[.]org  
Domain  download-obsstudio[.]duckdns[.]org  
Domain  dowbload-notepadd[.]duckdns[.]org  
Domain  dowbload-notepad1[.]duckdns[.]org  
Domain  download-davinci-resolve[.]duckdns[.]org  
Domain  download-davinci[.]duckdns[.]org  
Domain  download-sqlite[.]duckdns[.]org  
Domain  download-davinci17[.]duckdns[.]org  
Domain  download-rufus[.]duckdns[.]org  
Domain  download-kritapaint[.]duckdns[.]org  
IP Address    37[.]140[.]192[.]11  
IP Address     185[.]163[.]204[.]10  
IP Address     95[.]217[.]16[.]127  
IP Address    157[.]90[.]148[.]112  
IP Address    116[.]203[.]6[.]107  
URL     hxxps://t[.]me/litlebey  
URL     hxxps://steamcommunity[.]com/profiles/76561199472399815

References

[1] https://www.bleepingcomputer.com/news/security/hackers-push-malware-via-google-search-ads-for-vlc-7-zip-ccleaner/

[2] https://www.bleepingcomputer.com/news/security/ransomware-access-brokers-use-google-ads-to-breach-your-network/

[3] https://www.team-cymru.com/post/darth-vidar-the-dark-side-of-evolving-threat-infrastructure

Inside the SOC
Darktrace cyber analysts are world-class experts in threat intelligence, threat hunting and incident response, and provide 24/7 SOC support to thousands of Darktrace customers around the globe. Inside the SOC is exclusively authored by these experts, providing analysis of cyber incidents and threat trends, based on real-world experience in the field.
Written by
Roberto Martinez
Devalyst, Threat Researcher

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May 12, 2026

Resilience at the Speed of AI: Defending the Modern Campus with Darktrace

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Why higher education is a different cybersecurity battlefield

After four decades in IT, now serving as both CIO and CISO, I’ve learned one simple truth: cybersecurity is never “done.” It’s a constant game of cat and mouse. Criminals evolve. Technologies advance. Regulations expand. But in higher education, the challenge is uniquely complex.

Unlike a bank or a military installation, we can’t lock down networks to a narrow set of approved applications. Higher education environments are open by design. Students collaborate globally, faculty conduct cutting-edge research, and administrators manage critical operations, all of which require seamless access to the internet, global networks, cloud platforms, and connected systems.

Combine that openness with expanding regulatory mandates and tight budgets, and the balancing act becomes clear.

Threat actors don’t operate under the same constraints. Often well-funded and sponsored by nation-states with significant resources, they’re increasingly organized, strategic, and innovative.

That sophistication shows up in the tactics we face every day, from social engineering and ransomware to AI-driven impersonation attacks. We’re dealing with massive volumes of data, countless signals, and a very small window between detection and damage.

No human team, no matter how talented or how numerous, can manually sift through that noise at the speed required.

Discovering a force multiplier

Nothing in cybersecurity is 100% foolproof. I never “set it and forget it.” But for institutions balancing rising threats and finite resources, the Darktrace ActiveAI Security Platform™ offers something incredibly valuable: peace of mind through speed and scale.

It closes the gap between detection and response in a way humans can’t possibly match. At the speed of light, it can quarantine, investigate, and contain anomalous activity.

I’ve purchased and deployed Darktrace three separate times at three different institutions because I’ve seen firsthand what it can do and what it enables teams like mine to achieve.

I first encountered Darktrace while serving as CIO for a large multi-campus college system. What caught my attention was Darktrace's Self-Learning AI, and its ability to learn what "normal" looked like across our network. Instead of relying solely on static signatures or rigid rules, Darktrace built a behavioral baseline unique to our environment and alerted us in real time when something simply didn’t look right.

In higher education, where strict lockdowns aren’t realistic, that behavioral model made all the difference. We deployed it across five campuses, and the impact was immediate. Operating 24/7, Darktrace surfaced threats in ways our team couldn’t replicate manually.

Over time, the Darktrace platform evolved alongside the changing threat landscape, expanding into intrusion prevention, cloud visibility, and email security. At subsequent institutions, including Washington College, Darktrace was one of my first strategic investments.

Revealing the hidden threat other tools missed

One of the most surprising investigations of my career involved a data leak. Leadership suspected sensitive information from high-level meetings was being exposed, but our traditional tools couldn’t provide any answers.

Using Darktrace’s deep network visibility, down to packet-level data, we traced unusual connections to our CCTV camera system, which had been configured with a manufacturer’s default password. A small group of employees had hacked into the CCTV cameras, accessed audio-enabled recordings from boardroom meetings, and stored copies locally.

No other tool in our environment could have surfaced those connections the way Darktrace did. It was a clear example of why using AI to deeply understand how your organization, systems, and tools normally behave, matters: threats and risks don’t always look the way we expect.

Elevating a D-rating into a A-level security program

When I arrived at my last CISO role, the institution had recently experienced a significant ransomware attack. Attackers located  data  which informed their setting  ransom demands to an amount they knew would likely result in payment. It was a sobering example of how calculated and strategic modern cybercriminals have become.

Third-party cyber ratings reflected that reality, with a  D rating.

To raise the bar, we implemented a comprehensive security program and integrated layered defenses; -deploying state of the art tools and methods-  across the environment, with Darktrace at its core.

After a 90-day learning period to establish our behavioral baseline, we transitioned the platform into fully autonomous mode. In a single 30-day span, Darktrace conducted more than 2,500 investigations and autonomously resolved 92% of all false positives.

For a small team, that’s transformative. Instead of drowning in alerts, my staff focused on less than  200 meaningful cases that warranted human review.

Today, we maintain a perfect A rating from third-party assessors and have remained cybersafe.

Peace of mind isn’t about complacency

The effect of Darktrace as a force multiplier has a real human impact.

With the time reclaimed through automation, we expanded community education programs and implemented simulated phishing exercises. Through sustained training and awareness efforts, we reduced social engineering susceptibility from nearly 45% to under 5%.

On a personal level, Darktrace allows me to sleep better at night and take time off knowing we have intelligent systems monitoring and responding around the clock. For any CIO or CISO carrying institutional risk on their shoulders, that matters.

The next era: AI vs. AI

A new chapter in cybersecurity is unfolding as adversaries leverage AI to enhance scale, speed, and believability. Phishing campaigns are more personalized, impersonation attempts are more precise, and deepfake video technology, including live video, is disturbingly authentic. At the same time, organizations are rapidly adopting AI across their own environments —from GenAI assistants to embedded tools to autonomous agents. These systems don’t operate within fixed rules. They act across email, cloud, SaaS, and identity systems, often with broad permissions, and their behavior can evolve over time in ways that are difficult to predict or control.

That creates a new kind of security challenge. It’s not just about defending against AI-powered threats but understanding and governing how AI behaves within your environment, including what it can access, how it acts, and where risk begins to emerge.

From my perspective, this is a natural next step for Darktrace.

Darktrace brings a level of maturity and behavioral understanding uniquely suited to the complexity of AI environments. Self-Learning AI learns the normal patterns of each business to interpret context, uncover subtle intent, and detect meaningful deviations without relying on predefined rules or signatures. Extending into securing AI by bringing real-time visibility and control to GenAI assistants, AI agents, development environments and Shadow AI, feels like the logical evolution of what Darktrace already does so well.

Just as importantly, Darktrace is already built for dynamic, cross-domain environments where risk doesn’t sit in a single tool or control plane. In higher education, activity already spans multiple systems and, with AI, that interconnection only accelerates.

Having deployed Darktrace multiple times, I have confidence it’s uniquely positioned to lead in this space and help organizations adopt AI with greater visibility and control.

---

Since authoring this blog, Irving Bruckstein has transitioned to the role of Chief Executive Officer of the Cyberaigroup.

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Irving Bruckstein
CEO CyberAIgroup

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May 11, 2026

The Next Step After Mythos: Defending in a World Where Compromise is Expected

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Is Anthropic’s Mythos a turning point for cybersecurity?

Anthropic’s recent announcements around their Mythos model, alongside the launch of Project Glasswing, have generated significant interest across the cybersecurity industry.

The closed-source nature of the Mythos model has understandably attracted a degree of skepticism around some of the claims being made. Additionally, Project Glasswing was initially positioned as a way for software vendors to accelerate the proactive discovery of vulnerabilities in their own code; however, much of the attention has focused on the potential for AI to identify exploitable vulnerabilities for those with malicious intent.

Putting questions around the veracity of those claims to one side – which, for what it’s worth, do appear to be at least partially endorsed by independent bodies such as the UK’s AI Security Institute – this should not be viewed as a critical turning point for the industry. Rather, it reflects the natural direction of travel.

How Mythos affects cybersecurity teams  

At Darktrace, extolling the virtues of AI within cybersecurity is understandably close to our hearts. However, taking a step back from the hype, we’d like to consider what developments like this mean for security teams.

Whether it’s Mythos or another model yet to be released, it’s worth remembering that there is no fundamental difference between an AI discovered vulnerability and one discovered by a human. The change is in the pace of discovery and, some may argue, the lower the barrier to entry.

In the hands of a software developer, this is unquestionably positive. Faster discovery enables earlier remediation and more proactive security. But in the hands of an attacker, the same capability will likely lead to a greater number of exploitable vulnerabilities being used in the wild and, critically, vulnerabilities that are not yet known to either the vendor or the end user.

That said, attackers have always been able to find exploitable vulnerabilities and use them undetected for extended periods of time. The use of AI does not fundamentally change this reality, but it does make the process faster and, unfortunately, more likely to occur at scale.

While tools such as Darktrace / Attack Surface Management and / Proactive Exposure Management  can help security teams prioritize where to patch, the emergence of AI-driven vulnerability discovery reinforces an important point: patching alone is not a sufficient control against modern cyber-attacks.

Rethinking defense for a world where compromise is expected

Rather than assuming vulnerabilities can simply be patched away, defenders are better served by working from the assumption that their software is already vulnerable - and always will be -and build their security strategy accordingly.

Under that assumption, defenders should expect initial access, particularly across internet exposed assets, to become easier for attackers. What matters then is how quickly that foothold is detected, contained, and prevented from expanding.

For defenders, this places renewed emphasis on a few core capabilities:

  • Secure-by-design architectures and blast radius reduction, particularly around identity, MFA, segmentation, and Zero Trust principles
  • Early, scalable detection and containment, favoring behavioral and context-driven signals over signatures alone
  • Operational resilience, with the expectation of more frequent early-stage incidents that must be managed without burning out teams

How Darktrace helps organizations proactively defend against cyber threats

At Darktrace, we support security teams across all three of these critical capabilities through a multi-layered AI approach. Our Self-Learning AI learns what’s normal for your organization, enabling real-time threat detection, behavioral prediction, incident investigation and autonomous response. - all while empowering your security team with visibility and control.

To learn more about Darktrace’s application of AI to cybersecurity download our White Paper here.  

Reducing blast radius through visibility and control

Secure-by-design principles depend on understanding how users, devices, and systems behave. By learning the normal patterns of identity and network activity, Darktrace helps teams identify when access is being misused or when activity begins to move beyond expected boundaries. This makes it possible to detect and contain lateral movement early, limiting how far an attacker can progress even after initial access.

Detecting and containing threats at the earliest stage  

As AI accelerates vulnerability discovery, defenders need to identify exploitation before it is formally recognized. Darktrace’s behavioral understanding approach enables detection of subtle deviations from normal activity, including those linked to previously unknown vulnerabilities.

A key example of this is our research on identifying cyber threats before public CVE disclosures, demonstrating that assessing activity against what is normal for a specific environment, rather than relying on predefined indicators of compromise, enables detection of intrusions exploiting previously unknown vulnerabilities days or even weeks before details become publicly available.

Additionally, our Autonomous Response capability provides fast, targeted containment focused on the most concerning events, while allowing normal business operations to continue. This has consistently shown that even when attackers use techniques never seen before, Darktrace’s Autonomous Response can contain threats before they have a chance to escalate.

Scaling response without increasing operational burden

As early-stage incidents become more frequent, the ability to investigate and respond efficiently becomes critical. Darktrace’s Cyber AI Analyst’s AI-driven investigation capabilities automatically correlate activity across the environment, prioritizing the most significant threats and reducing the need for manual triage. This allows security teams to respond faster and more consistently, without increasing workload or burnout.

What effective defense looks like in an AI-accelerated landscape

Developments like Mythos highlight a reality that has been building for some time: the window between exposure and exploitation is shrinking, and in many cases, it may disappear entirely. In that environment, relying on patching alone becomes increasingly reactive, leaving little room to respond once access has been established.

The more durable approach is to assume that compromise will occur and focus on controlling what happens next. That means identifying early signs of misuse, containing threats before they spread, and maintaining visibility across the environment so that isolated signals can be understood in context.

AI plays a role on both sides of this equation. While it enables attackers to move faster, it also gives defenders the ability to detect subtle changes in behavior, prioritize what matters, and respond in real time. The advantage will not come from adopting AI in isolation, but from applying it in a way that reduces the gap between detection and action.

AI may be accelerating parts of the attack lifecycle, but the fundamentals of defense, detection, and containment still apply. If anything, they matter more than ever – and AI is just as powerful a tool for defenders as it is for attackers.

To learn more about Darktrace and Mythos read more on our blog: Mythos vs Ethos: Defending in an Era of AI‑Accelerated Vulnerability Discovery

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Toby Lewis
Head of Threat Analysis
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