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TrojanSpy:Win32/VBStat.AD


TrojanSpy:Win32/VBStat.AD is dropped as a component of Worm:Win32/RJump.F. Its purpose is to execute Win32/RJump.F at each Windows start.


What to do now

Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as the Microsoft Safety Scanner (http://go.microsoft.com/fwlink/?LinkId=212742). For more information, see http://www.microsoft.com/protect/computer/viruses/vista.mspx.

Threat behavior

TrojanSpy:Win32/VBStat.AD is dropped as a component of Worm:Win32/RJump.F. Its purpose is to execute Win32/RJump.F at each Windows start.
Installation
This trojan is a component of Worm:Win32/RJump.F. When Worm:Win32/RJump.F is executed, it may drop the following files:
  • %windir%\mdm.exe - detected as TrojanSpy:Win32/VBStat.AD
  • %windri%\svchost.exe - detected as Worm:Win32/RJump.F
  • %windir%\svchost.ini - data file used by Worm:Win32/RJump.F
Worm:Win32/RJump.F executes the dropped component "mdm.exe" which modifies the registry to launch Win32/RJump.F at each Windows start.
Adds value: "SVCHOST"
With data: "%windir%\mdm.exe"
To subkey: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run
Payload
Executes Win32/RJump.F
When TrojanSpy:Win32/VBStat.AD executes, it uses ShellExecute to launch "%windir%\svchost.exe" which is the dropped copy of Worm:Win32/RJump.F.
 
For more information about Worm:Win32/RJump.F, please see elsewhere in our encyclopedia.
Analysis by Patrik Vicol

Symptoms

System Changes
The following system changes may indicate the presence of TrojanSpy:Win32/VBStat.AD:
  • Presence of the following files:
    %windir%\mdm.exe
    %windri%\svchost.exe
    %windir%\svchost.ini
  • Presence of the following registry modification:
    Value: "SVCHOST"
    With data: "%windir%\mdm.exe"
    In subkey: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run

Prevention


Alert level: Severe
This entry was first published on: May 16, 2008
This entry was updated on: Apr 17, 2011

This threat is also detected as:
  • Win-Trojan/Agent.22016.AQ (AhnLab)
  • W32/Backdoor.ARLD (Command)
  • Generic2.VEB (AVG)
  • Trojan.Agent.AIQ (BitDefender)
  • Win32/Compfault.B (CA)
  • Win32/Agent.NAV (ESET)
  • Trojan.Win32.Agent.abt (Kaspersky)
  • W32/DKR.worm (McAfee)
  • W32/Agent.BJUX (Norman)
  • Trj/Agent.DYJ (Panda)
  • Troj/Bckdr-PXR (Sophos)
  • TROJ_AGENT.JXU (Trend Micro)
  • Trojan.Agent.GXZ (VirusBuster)