Virus:TR/Dldr.Zlob.AM
Date discovered:11/06/2010
Type:Trojan
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low to medium
Damage Potential:Low
Static file:Yes
File size:178.688 Bytes
MD5 checksum:6d8e646742bceca3136cdeac01cb13d0
IVDF version:7.10.08.65 - Monday, June 14, 2010

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Mcafee: Downloader-CEW.b
   •  Kaspersky: Packed.Win32.Katusha.n
   •  TrendMicro: TROJ_FAKEAV.SMA1
   •  Sophos: Mal/FakeAV-CX
   •  Avast: Win32:MalOb-BL
   •  Microsoft: TrojanDownloader:Win32/Renos.LX
   •  AVG: FakeAV.BXR
   •  Panda: Trj/Zlob.KH
   •  PCTools: Trojan.FakeAV
   •  Eset: Win32/Kryptik.EZX
   •  AhnLab: Win-Trojan/Katusha.178688.M


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


Side effects:
   • Drops files
   • Drops a malicious file
   • Registry modification

 Files It copies itself to the following location:
   • %WINDIR%\Nxihaa.exe



It deletes the initially executed copy of itself.



The following files are created:

– %WINDIR%\Tasks\{%CLSID%}.job File is a scheduled task that runs the malware at predefined times.
– %TEMPDIR%\a.dat Furthermore it gets executed after it was fully created. This is a non malicious text file that contains information about the program itself.

 Registry The following registry key is added:

– [HKCU\Software\V71IQL7HI7]
   • NpuO="FOqmU9PNRhfd9w=="
   • NpuZ="Gbv+C4eSExjnyIpWf4+pYXAo/2QGxA/X94OiMMEM3fg21bnyyVNA5swcCBRfcPq52epvdMeg//Fz+p6csSavmjbegPbMh4ax7rfcfKkoeMvrtfbyG0YYMciBwobC04dKWFLpaMfWzLhqf0dQgXOSD7d7IoDtQGco+B8WFglQ5et5wxHVgh5kOpchQjxcIpmhLuQnWClc2ZKZJMLezx4Yq0zGuC4/9Y0AhF0GRGl2xYDgIk5EV2+LYI34Qv74AMzp3Q=="
   • NkeG=dword:00015180
   • NkeJ=dword:00000008
   • Nke9=dword:00000e10
   • NkeO=dword:000000d5
   • NkeC=dword:00000064
   • NkeT=dword:00000001
   • NkeFC=dword:00000000
   • NkeZ=dword:01cb0a31
   • NkeF=dword:6f84a3b0
   • NpuJ="ZuLNIa64IWuvvLI2R7yOE08V8iFnqi/6lPGZOoQgs7J0x4Dgk1NI9w=="

Description inserted by Carlos Valero Llabata on Tuesday, August 10, 2010
Description updated by Carlos Valero Llabata on Tuesday, August 10, 2010

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