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Virus:WORM/Cycbot.S.4
Date discovered:26/07/2011
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:171.520 Bytes
MD5 checksum:D2954496B08A6308BE4EE669C261BD3A
VDF version:7.11.12.128 - Tuesday, July 26, 2011
IVDF version:7.11.12.128 - Tuesday, July 26, 2011

 General Aliases:
   •  Kaspersky: Trojan.Win32.Menti.hirs
   •  TrendMicro: BKDR_CYCBOT.SMIB
     Microsoft: Backdoor:Win32/Cycbot.B


Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Registry modification

 Files It copies itself to the following location:
   • %HOME%\Application Data\Microsoft\conhost.exe



The following file is created:

%HOME%\Application Data\C826.657

 Registry The following registry key is added in order to run the process after reboot:

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
   • "conhost"="%HOME%\Application Data\Microsoft\conhost.exe"



The following registry key is added:

[HKEY_CURRENT_CONFIG\Software\Microsoft\windows\CurrentVersion\
   Internet Settings]
   • "ProxyEnable"=dword:00000001



The following registry key is changed:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings]
   New value:
   • "MigrateProxy"=dword:00000001
   • "ProxyEnable"=dword:00000001
   • "ProxyServer"="http=127.0.0.1:%number%"
   • "ProxyOverride"=-
   • "AutoConfigURL"=-

 Miscellaneous  Checks for an internet connection by contacting the following web site:
   • http://www.google.com
Accesses internet resources:
   • http://crazyleafdesign.com/blog/images/share/**********?v84=%number%&tq=%character string%
   • http://zonetf.com/**********?tq=%character string%
   • http://zoneoc.com/blog/images/**********?v50=%number%&tq=%character string%
   • http://smallautosite.com/blog/images/**********?v32=%number%&tq=%character string%


Mutex:
It creates the following Mutexes:
   • {7791C364-DE4E-4000-9E92-9CCAFDDD90DC}
   • {A5B35993-9674-43cd-8AC7-5BC5013E617B}
   • {B37C48AF-B05C-4520-8B38-2FE181D5DC78}
   • {61B98B86-5F44-42b3-BCA1-33904B067B81}

 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 the following runtime packer:
   • UPX

Description inserted by Andrei Ilie on Tuesday, November 1, 2011
Description updated by Andrei Ilie on Wednesday, November 2, 2011

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