Nitrogen: A Malicious Campaign Exploiting Google and Bing Ads

Cybercriminals actively exploit Google and Bing ads in the Nitrogen campaign to target users searching for specific IT tools. Their objective is to infiltrate enterprise environments and inject tools like Cobalt Strike. The attackers aim to gain unauthorized access to these environments and potentially conduct further nefarious activities.

What is Nitrogen?

The Nitrogen malvertising campaign utilizes Google and Bing Pay-per-Click (PPC) advertisements to imitate genuine websites, deceiving users into downloading malicious installers (Windows Installer files).

Threat actors mimic well-known software, such as AnyDesk, Cisco AnyConnect VPN, TreeSize Free, and WinSCP, with the goal of luring unsuspecting users into using trojanized installers. When users download these trojanized installers, an ISO image file is created on their computers.

Inside this ISO file, an executable file appears harmless. However, when executed, it secretly loads a malicious file, initiating the infection. As previously mentioned, the cybercriminals orchestrating the Nitrogen campaign intend to deploy second-stage attack tools such as Cobalt Strike.

Cobalt Strike is a powerful commercial penetration testing tool widely used in cybersecurity. However, threat actors have misused Cobalt Strike for conducting advanced and sophisticated cyberattacks due to its capabilities and popularity.

With Cobalt Strike, threat actors can simulate genuine user behavior, conduct reconnaissance, steal sensitive data, launch ransomware attacks, and deploy other malware payloads. It is essential to note that cybercriminals behind Nitrogen may use other tools to achieve their goals.

Name	Nitrogen Malvertising Campaign
Detection	Trojan:Win64/Meterpreter, Trojan:Win64/Cobaltstrike
Damage	The attackers aim to infiltrate enterprise environments and inject tools like Cobalt Strike, potentially gaining unauthorized access and conducting sophisticated cyberattacks. Users can be tricked into downloading trojanized installers, leading to the execution of harmful files and potential compromise of their systems. Vigilance and caution are crucial to protect against this threat, along with downloading software only from reputable sources and maintaining up-to-date security measures.

In conclusion, the Nitrogen malvertising campaign demonstrates the ingenuity and cunning of cybercriminals who exploit Google and Bing ads to target IT users. By impersonating reputable software and distributing trojanized installers, these attackers aim to infect systems with tools like Cobalt Strike, giving them the means to execute sophisticated cyberattacks.

The campaign highlights the importance of vigilance and caution among users when downloading software and interacting with online advertisements. Emphasizing the need for robust cybersecurity measures to protect against such threats is crucial.

How Nitrogen Infiltrated My Computer

On these fake sites, users are enticed into downloading trojanized ISO installers, which appear to be harmless files. However, once executed, these trojanized installers deploy malicious content.

Threat actors often use fake websites disguised as download sites for Cisco AnyConnect VPN, TreeSize Free, WinSCP, and other legitimate tools.

How to Avoid Installing Malware

To avoid installing malware, download software only from reputable sources, such as official websites and stores. Before proceeding with the download, check the website’s URL for spelling errors or suspicious domain names. Exercise caution when opening links or attachments within unsolicited emails from unknown senders. Keep your operating system, software, and antivirus programs up to date.

Frequently Asked Questions (FAQ)

1. What is the Nitrogen campaign?

The Nitrogen campaign is a malicious cyber operation in which cybercriminals exploit Google and Bing ads to target users searching for specific IT tools. The objective is to infiltrate enterprise environments and inject tools like Cobalt Strike to gain unauthorized access and conduct nefarious activities.

2. How does the Nitrogen malvertising campaign work?

In the Nitrogen malvertising campaign, cybercriminals utilize Google and Bing Pay-per-Click (PPC) advertisements to imitate genuine websites, tricking users into downloading malicious installers (Windows Installer files). These trojanized installers create an ISO image file on users’ computers, which contains an apparently harmless executable file.

3. What tools do the threat actors behind Nitrogen use?

The cybercriminals orchestrating the Nitrogen campaign deploy second-stage attack tools such as Cobalt Strike. Cobalt Strike is a powerful commercial penetration testing tool widely used in cybersecurity. Unfortunately, due to its capabilities and popularity, it has also been misused by threat actors for conducting advanced and sophisticated cyberattacks.

4. How can Cobalt Strike be misused by threat actors?

With Cobalt Strike, threat actors can simulate genuine user behavior, conduct reconnaissance, steal sensitive data, launch ransomware attacks, and deploy other malware payloads. The tool’s versatility makes it attractive for cybercriminals seeking to carry out various malicious activities.

5. What does the Nitrogen campaign target specifically?

The Nitrogen campaign targets users searching for specific IT tools and software. Threat actors mimic well-known software like AnyDesk, Cisco AnyConnect VPN, TreeSize Free, WinSCP, among others, to lure unsuspecting users into downloading trojanized installers.

6. How does Nitrogen infiltrate computers?

The infection chain begins with cybercriminals using malvertising through Google and Bing Ads to attract users’ attention. These ads direct users to compromised WordPress sites and phishing pages that pretend to be legitimate software distribution websites. On these fake sites, users are enticed into downloading trojanized ISO installers, which contain hidden malicious content.

7. What can users do to avoid installing malware like Nitrogen?

To avoid installing malware, users should download software only from reputable sources, such as official websites and stores. They should also check the website’s URL for spelling errors or suspicious domain names before proceeding with the download. Additionally, exercise caution when opening links or attachments from unknown senders and keep operating systems, software, and antivirus programs up to date.

8. What are the implications of the Nitrogen campaign?

The Nitrogen campaign underscores the importance of vigilance and caution among users when interacting with online advertisements and downloading software. It emphasizes the need for robust cybersecurity measures to protect against such threats.

9. What should I do if I suspect my computer is infected with Nitrogen or similar malware?

If you believe your computer is already infected, we recommend running a scan with This tool can automatically detect and eliminate infiltrated malware, including variants of the Nitrogen campaign. It’s important to take action promptly to prevent further damage to your system.

10. How can organizations protect themselves against campaigns like Nitrogen?

Organizations should implement strong cybersecurity measures, including regular security training for employees to recognize and avoid phishing attempts and malicious ads. Employing up-to-date antivirus software, conducting regular system patching, and monitoring network traffic for suspicious activities are also crucial steps in protecting against such campaigns.