Virus:DR/Cinmus.dtk
Date discovered:12/12/2008
Type:Dropper
In the wild:No
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:112.140 Bytes
MD5 checksum:a67931fcd5c27b9d94a7b05be2003c6f
IVDF version:7.01.00.225 - Friday, December 12, 2008

 General Method of propagation:
   • No own spreading routine


Aliases:
   •  Kaspersky: not-a-virus:AdWare.Win32.Cinmus.adhz
   •  F-Secure: AdWare.Win32.Cinmus.adhz
   •  Sophos: Troj/Cinmus-H
   •  Grisoft: Adload_r.EW
   •  Eset: probably a variant of Win32/Adware.Cinmus


Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003


Side effects:
   • Drops a malicious file
   • Registry modification

 Files It deletes the initially executed copy of itself.



The following file is created:

– %WINDIR%\Rose\pbhealth.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Cinmus.AQ

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

– [HKCR\CLSID\{285AB8C6-FB22-4D17-8834-064E2BA0A6F0}\InprocServer32]
   • "(Default)"="%WINDIR%\Rose\pbhealth.dll"
   • "ThreadingModel"="Apartment"



It registers a browser helper object (BHO) by adding the following key:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\
   Browser Helper Objects\{285AB8C6-FB22-4D17-8834-064E2BA0A6F0}]

 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 Thomas Wegele on Thursday, December 18, 2008
Description updated by Thomas Wegele on Thursday, December 18, 2008

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