FakeAV.DBG: A Malware uses Windows Sysinternals name to avoid detection
The Dell Sonicwall Threats Research team observed reports of a New Malware family named GAV: FakeAV.DBG actively spreading in the wild. This time attackers used fake name such as Sysinternals Debug Output Viewer for their malware to avoid detection by users. Sysinternals is a part of the Microsoft TechNet website which offers technical resources and utilities to manage, diagnose, troubleshoot, and monitor a Microsoft Windows environment.
The Malware uses the following icon:
The Malware adds the following files to the system:
C:Program FilesCommon Filessochvst.exe [Detected as GAV: FakeAV.DBG (Trojan)]
The Malware adds the files to Windows start-up folder to ensure persistence upon reboot:
%Userprofile%Start MenuXnz.url [ Auto Start-up file ]
%Userprofile%Start MenuXnv.url [ Auto Start-up file ]
Once the computer is compromised, the malware copies its own files to User and Startup folders.
The Xnz.url and Xnv.url files dropped after malware launches on the target system, here is an example:
The malware uses a DLL Injection to avoid detection by Anti-Virus programs. Here is an example:
The Malware installs key Logger on the target machine and extracts valuable information such as pressed keys like following example:
Command and Control (C&C) Traffic
FakeAV.DBG performs C&C communication over 5133 port. The malware sends your system information to its own C&C server via following format, here is an example:
SonicWALL Gateway AntiVirus provides protection against this threat via the following signature:
GAV: FakeAV.DBG (Trojan)