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Date discovered:16/02/2011
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:225.280 Bytes
MD5 checksum:2b8e672108ca41a7326a789e96d5ea86
VDF version:
IVDF version:

 General Method of propagation:
   • Autorun feature

   •  Mcafee: W32/Rimecud
   •  Kaspersky: Worm.Win32.AutoRun.cbca
   •  Bitdefender: Win32.Worm.Palevo.CL
   •  Panda: W32/P2PWorm.HO
   •  GData: Win32.Worm.Palevo.CL

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

Side effects:
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following locations:
   • %drive%\sond\Mircr0dll.exe
   • %HOME%\Application Data\yxttd.exe

The following file is created:

%drive%\autorun.inf This is a non malicious text file with the following content:
   • %code that runs malware%

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

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   • "Taskman"="%HOME%\Application Data\yxttd.exe"

 Backdoor Contact server:
All of the following:
   • alotibi.xyl**********.com:8007 (UDP)
   • tep.xyl**********.com:8007 (UDP)
   • tep.xyl**********.com:8007 (UDP)
   • tep.xyl**********.com:8007 (UDP)
   • alotibi.pan**********.com:8007 (UDP)

 Injection – It injects itself as a remote thread into a process.

    Process name:
   • explorer.exe

 Miscellaneous Mutex:
It creates the following Mutex:
   • +''H+17

 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 Monday, April 18, 2011
Description updated by Petre Galan on Monday, April 18, 2011

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