Virus:TR/Fakealert.MA.591
Date discovered:21/07/2010
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:172.032 Bytes
MD5 checksum:9da73b97fb0532f93b4962100903a9c7
IVDF version:7.10.09.190 - Friday, July 23, 2010

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Symantec: Downloader-CEW.b
   •  Kaspersky: Packed.Win32.Katusha.n
   •  TrendMicro: TROJ_FAKEAV.SMA2
   •  F-Secure: Trojan-Downloader:W32/Renos.GRS
   •  Sophos: Mal/FakeAV-BW
   •  Avast: Win32:MalOb-BR
   •  Microsoft: TrojanDownloader:Win32/Renos.KF
   •  PCTools: Trojan.FakeAV
   •  VirusBuster: Trojan.Kryptik.AHJS
   •  Sunbelt: VirTool.Win32.Obfuscator.hg!b
   •  AhnLab: Win-Trojan/Katusha.172032.CX
   •  DrWeb: Trojan.Packed.189
   •  Fortinet: W32/Katusha.BW!tr


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


Side effects:
   • Drops a file
   • Registry modification

 Files The following file is created:

– %WINDIR%\taks\%CLSID%.job Furthermore it gets executed after it was fully created. File is a scheduled task that runs the malware at predefined times.

 Registry One of the following values is added in order to run the process after reboot:

–  [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • %random character string%"="c:\%current directory%\%executed file%



The following registry keys are added:

– [HKCU\Software\%random character string%]
   • "%random character string%"="%random character string%"
   • "%random character string%"="%random character string%"
   • "%random character string%"=dword:%hex values%
   • "%random character string%"=dword:%hex values%
   • "%random character string%"=dword:%hex values%
   • "%random character string%"="%random character string%"
   • "%random character string%"="%random character string%"
   • "%random character string%"=dword:%hex values%
   • "%random character string%"=dword:%hex values%
   • "%random character string%"=dword:%hex values%

– [HKCU\Software\XML]

Description inserted by Christoph Baumann on Thursday, September 2, 2010
Description updated by Christoph Baumann on Thursday, September 2, 2010

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