Attackers typically try to pass off malware as legitimate applications or as potentially unwanted programs that users deliberately search for and download, such as cheats or cracks. They often rely on ad and affiliate networks to deliver their creations to victims’ devices. This post examines a less conventional case: a well-known backdoor distributed under the guise of adware. The attackers may have chosen this distribution method because the adware was signed by the developer. On top of that, users often manually add these apps to exclusions, so their useful features don’t get blocked.
Some time ago, a client asked us to analyze a file with the MD5 hash c24e99f9437feacaa63766a3cde3fe3d and add it to our detection database. We initially classified it as adware, but a cursory analysis turned up suspicious network activity, which prompted us to dig deeper. It turned out the sample did far more than serve ads. In fact, its advertising functionality doesn’t even work; instead, it triggers an infection chain that delivers the ValleyRAT backdoor.
Read more…
Source: Kaspersky
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Kaspersky GReAT uncovers attack targeting government-only Windows system in Asia
October 29, 2026
Kaspersky’s Global Research and Analysis Team (GReAT) has uncovered an attack targeting a customized version of Windows 10 used exclusively by government organizations in an Asian country. The attackers used legitimate software components to launch NetamLoader, a previously unknown malware framework that can receive and run additional code while concealing its activity. The team presented ...
- Hackers are breaking into company networks via hacked CCTV camera software
October 29, 2026
Attackers abused camera management software to gain initial access and establish persistence on networks. Campaign used DLL sideloading and reverse shells to evade detection and maintain control. Researchers urge treating camera systems as security-sensitive assets and monitoring them for abnormal activity. Read more… Source: Sign up for the Cyber Security Review Newsletter The latest cyber security news and insights delivered ...
- Hacker stole personnel data about thousands of Homeland Security employees, including CBP and ICE agents
October 28, 2026
Personally identifiable information belonging to thousands of U.S. Department of Homeland Security employees has been published online after a hacker stole reams of data in a previously undisclosed breach at the government department earlier this year. The breach includes names, job titles, and work contact information, such as email addresses, cell phone numbers, and office locations, ...
- A security flaw in these widely used barcode scanners could open up warehouses and stores to cyberattack
October 28, 2026
Researchers find Bluetooth flaws in warehouse barcode scanners that could provide a foothold into enterprise networks. Attackers could spoof scanner input, inject keystrokes, and potentially pivot to ransomware or data theft. Kaspersky urges stronger device authentication, network segmentation, and stricter security controls for warehouse infrastructure. Read more… Source: TechRadar News Sign up for the Cyber Security Review Newsletter The latest cyber ...
- Rogue AI agent engages ‘Skynet mode’ to search the internet for exposed LLMs to hijack and run malware attacks
October 26, 2026
Researchers uncovered an autonomous AI attack campaign that hijacks exposed AI agents and infrastructure. The malicious “Skynet” agent deployed cryptominers, stole credentials, and recruited new AI systems autonomously. Security teams are urged to secure AI endpoints, restrict permissions, and protect high-value API keys. Read more… Source: TechRadar News Sign up for the Cyber Security Review Newsletter The latest cyber security news ...
- Patient records exposed in Quest breach
October 26, 2026
Quest Diagnostics has confirmed that an unauthorized party accessed a system healthcare providers use to order laboratory tests and view results, affecting personal information and patient records. Quest is a major US laboratory testing company whose services help healthcare professionals diagnose and monitor medical conditions. Those services range from routine laboratory testing to specialized testing in ...