Serbbu.RAC: A Malware opens Remote Access Service on target system.


The Dell Sonicwall Threats Research team observed reports of a Malware family named GAV: Serbbu.RAC actively spreading in the wild. This time attacker enables Remote Access Service feature to get Remote Access from target system after infection.

Infection Cycle:

The Malware uses the following icon:


  • 743b8278efc6da0c35c138ac74c37516

Once the computer is compromised, the malware starts to communicate with its own domain such as following example:

The Malware tries to active your Guest user name on your Local Group domain so the attackers can easily getting access to your network later.

The Malware installs key Logger on the target machine and also extracts valuable information such as following examples:

The Malware extracts phone numbers, Device type and CPU information from target system.

When the Malware collects that information its uses Self-Signed encryption for C&C data communication to avoid detection by Anti-Virus programs, here is an example:

Command and Control (C&C) Traffic

Serbbu.RAC performs C&C communication over Port 7777. The malware sends your system information to its own C&C server via following format, here are some examples:

SonicWALL Gateway AntiVirus provides protection against this threat via the following signature:

  • GAV: Serbbu.RAC (Trojan)

Security News
The SonicWall Capture Labs Threat Research Team gathers, analyzes and vets cross-vector threat information from the SonicWall Capture Threat network, consisting of global devices and resources, including more than 1 million security sensors in nearly 200 countries and territories. The research team identifies, analyzes, and mitigates critical vulnerabilities and malware daily through in-depth research, which drives protection for all SonicWall customers. In addition to safeguarding networks globally, the research team supports the larger threat intelligence community by releasing weekly deep technical analyses of the most critical threats to small businesses, providing critical knowledge that defenders need to protect their networks.