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Virus:Worm/Cycbot.A
Date discovered:24/02/2011
Type:Worm
In the wild:No
Reported Infections:Low to medium
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:220.160 Bytes
MD5 checksum:b98109bca4f6ef28847bc8d829131d7d
VDF version:7.10.09.16
IVDF version:7.11.03.210 - Thursday, February 24, 2011

 General Aliases:
   •  Kaspersky: Trojan.Win32.Diple.cup
   •  Bitdefender: Gen:Trojan.Heur.KS.1
   •  Eset: Win32/Kryptik.KZB
   •  GData: Gen:Trojan.Heur.KS.1
   •  DrWeb: Trojan.DownLoader2.50502


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


Side effects:
   • Drops malicious files
   • Registry modification

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



The following file is created:

– %HOME%\Application Data\C826.657

 Registry The following registry key is changed:

– [HKCU\Software\Microsoft\Windows NT\CurrentVersion\Windows]
   New value:
   • "Load"="%TEMPDIR%\csrss.exe"

 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/**********?v42=%number%&tq=%character string%
   • http://zonetf.com/**********?tq=%character string%
   • http://zonewl.com/blog/images/**********?v68=%number%&tq=%character string%
   • http://smallautosite.com/blog/images/**********?v50=%number%&tq=%character string%


Mutex:
It creates the following Mutexes:
   • {EEEB680D-AE62-4375-B93E-E9AE5FF585C1}
   • {4D92BB9F-9A66-458f-ACA4-66172A7016D4}
   • {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 a runtime packer.

Description inserted by Petre Galan on Wednesday, May 25, 2011
Description updated by Petre Galan on Wednesday, May 25, 2011

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