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:
- Ransomware attack halts Argentinian border crossing for four hours
September 6, 2020
Argentina’s official immigration agency, Dirección Nacional de Migraciones, suffered a Netwalker ransomware attack that temporarily halted border crossing into and out of the country. While ransomware attacks against cities and local agencies have become all too common, this may be a first known attack against a federal agency that has interrupted a country’s operations. According to a ...
- FBI issues second alert about ProLock ransomware stealing data
September 4, 2020
The FBI issued a second warning this week to alert US companies of ProLock ransomware operators stealing data from compromised networks before encrypting their victims’ systems. The 20200901-001 Private Industry Notification seen by BleepingComputer on September 1st comes after the MI-000125-MW Flash Alert on the same subject issued by the FBI four months ago, on May ...
- Thanos Ransomware: Destructive Variant Targeting State-Run Organizations in the Middle East and North Africa
September 4, 2020
On July 6 and July 9, 2020, we observed files associated with an attack on two state-run organizations in the Middle East and North Africa that ultimately installed and ran a variant of the Thanos ransomware. The Thanos variant created a text file that displayed a ransom message requesting the victim transfer “20,000$” into a ...
- Cyberthreats for ICS in Energy in Europe. Q1 2020
September 4, 2020
Computers in European countries which are used to configure, maintain and control equipment in the energy industry on which Kaspersky products are installed. This includes Windows computers on which various software packages for the energy industry are installed, including but not limited to human-machine interface (HMI), OPC gateway, engineering, control and data acquisition software. Overall, in ...
- XCSSET Update: Browser Debug Modes, Inactive Ransomware
September 4, 2020
In our first blog post that covered XCSSET, we discussed its relatively unique danger to Xcode developers and the way it took advantage of two macOS vulnerabilities to maximize what it can take from an infected machine. Our research into this incident is still ongoing, and in this blog post, we cover some other aspects of ...
- Digital Education: The cyberrisks of the online classroom
September 4, 2020
This past spring, as the COVID-19 pandemic took hold, online learning became the new norm as universities and classrooms around the world were forced to close their doors. By April 29, 2020, more than 1.2 billion children across 186 countries were impacted by school closures. Shortly after schools began to transition to emergency remote learning, it ...