Virus:TR/Cosmu.AALV.1
Date discovered:02/08/2010
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:679.936 Bytes
MD5 checksum:f305b5ec815b22b8b2cf0028884dc3f0
IVDF version:7.10.10.45 - Monday, August 2, 2010

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Trojan.Win32.Cosmu.aalv
   •  Eset: Win32/Adware.GabPath.A
   •  AhnLab: Trojan/Win32.Cosmu


Platforms / OS:
   • Windows 98
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003
   • Windows Vista
   • Windows Server 2008
   • Windows 7


Side effects:
   • Drops a malicious file
   • Registry modification

 Files It copies itself to the following location:
   • %TEMPDIR%\uninstall.exe

 Registry To each registry key one of the values is added in order to run the processes after reboot:

–  [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "GabPath"=-

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "GabPath"=-



The following registry key is changed:

– [HKCU\Software\Microsoft\Windows\CurrentVersion]
   New value:
   • "nrungp"=dword:00000001

 File details Programming language:
 The malware program was written in MS Visual C++.


Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

Description inserted by Carlos Valero Llabata on Thursday, August 5, 2010
Description updated by Carlos Valero Llabata on Thursday, August 5, 2010

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