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Virus:BDS/Cycbot.BP
Date discovered:12/07/2011
Type:Backdoor Server
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low
Static file:Yes
File size:188.928 Bytes
MD5 checksum:29264048c8ff1f81fa76275f49098526
VDF version:7.11.11.93 - Tuesday, July 12, 2011
IVDF version:7.11.11.93 - Tuesday, July 12, 2011

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: Backdoor.Win32.Gbot.mej
   •  Sophos: Troj/FakeAV-EFL
   •  Bitdefender: Gen:Variant.Kazy.30647
   •  Eset: Win32/Kryptik.QGL
     DrWeb: Trojan.DownLoader4.11080


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003
    Windows Vista
    Windows Server 2008
    Windows 7


Side effects:
   • Third party control
   • Downloads malicious files
   • Registry modification

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



It deletes the initially executed copy of itself.



It deletes the following files:
   • %TEMPDIR%\41.exe
   • %TEMPDIR%\42.exe



The following files are created:

%HOME%\Application Data\ADC6.442
%TEMPDIR%\41.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: BDS/Cycbot.BP

%HOME%\Application Data\Microsoft\conhost.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: BDS/Cycbot.BP

%TEMPDIR%\42.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: BDS/Cycbot.BP

%HOME%\Application Data\dwm.exe Furthermore it gets executed after it was fully created. Further investigation pointed out that this file is malware, too. Detected as: BDS/Cycbot.BP

%HOME%\Application Data\Microsoft\gb_12797937.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.

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

  [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows]
   • "Load"="C:\DOCUME~1\\KARZEM~1\\LOCALS~1\\Temp\\csrss.exe"

 Backdoor The following port is opened:
on TCP port 1192 in order to provide backdoor capabilities.

 Miscellaneous Accesses internet resources:
   • http://hollan**********rett.com/images/footer/account.jpg?v20=**********F4%3D;
      http://super**********srem.com/blog/images/3521.jpg?v92=**********WW1cg;
      http://onlinedating**********friends.com/images/im133.jpg?v95=**********3D%3D;
      http://mysmall**********space.com/blog/images/3521.jpg?v88=**********WW1cg;
      http://nations**********electric.com/images/50-217-1_F_1_.jpg?v81=**********w%3D;
      http://mysmall**********space.com/blog/images/3521.jpg?v22=**********3D%3D;
      http://xp**********stats.com/images/logo.png?tq=**********jg%3D;
      http://super**********srem.com/blog/images/3521.jpg?v67=**********3D%3D;
      http://super**********srem.com/blog/images/3521.jpg?tq=**********WQ%3D

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
   • UPX

Description inserted by Jason Soo on Thursday, July 14, 2011
Description updated by Jason Soo on Thursday, July 14, 2011

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