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Virus:Worm/Pinit.KT
Date discovered:25/04/2010
Type:Worm
In the wild:Yes
Reported Infections:Low to medium
Distribution Potential:Low to medium
Damage Potential:Low to medium
Static file:Yes
File size:222.720 Bytes
MD5 checksum:d5915fe4ffb53c581b12a6fbdd9931e9
IVDF version:7.10.06.198 - Sunday, April 25, 2010

 General Aliases:
   •  Sophos: Mal/EncPk-OC
   •  Bitdefender: Trojan.Generic.KD.8385
   •  Panda: W32/Pinit.L.worm
   •  Eset: Win32/Pinit.AF


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


Side effects:
   • Downloads malicious files
   • Drops malicious files
   • Registry modification

 Files It copies itself to the following location:
   • %SYSDIR%\cooper.mine



It deletes the following file:
   • %SYSDIR%\samgjudpfq



The following files are created:

%SYSDIR%\user32.dll
%SYSDIR%\bb52fkri.few
%SYSDIR%\dllcache\user32.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Patched.Gen2

%SYSDIR%\23rh46g.4e
%SYSDIR%\samgjudpfq Further investigation pointed out that this file is malware, too. Detected as: TR/Patched.Gen2

%SYSDIR%\wjfogks
%SYSDIR%\nmklo.dll



It tries to download some files:

The location is the following:
   • http://dred3.cn/ztvb/gate/**********


The location is the following:
   • http://dred3.cn/tpsa/gate/**********


The location is the following:
   • http://dred3.cn/ztvb/gate/**********




It tries to executes the following file:

Filename:
   • "%SYSDIR%\Wbem\wmic.exe" path win32_terminalservicesetting where (__Class!="") call setallowtsconnections 1

 Registry The following registry keys are added:

[HKLM\SOFTWARE\9]
   • "31897356954C2CD3D41B221E3F24F99BBA"=dword:0x02a62b1c
   • "31AC70412E939D72A9234CDEBB1AF5867B"="nqrckqqlqdrqrirprhqoqrqdopoinfnhmjmqrjrjlmrhrnnnmerrrmmmqcrnnh"
   • "31C2E1E4D78E6A11B88DFA803456A1FFA5"=dword:0x00000000

[HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion]
   • "MID"="51FF73B7152F4B24AB5CB8AF87D770B8C440DCF0665C47B88B52A63789380F08"

[HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows]
   • "Appirgt_Dlls"="nmklo"

[HKLM\SOFTWARE\1]
   • "31897356954C2CD3D41B221E3F24F99BBA"=dword:0x02a62b1c
   • "31AC70412E939D72A9234CDEBB1AF5867B"="efipdhioiijnjpjcjmidigiggmgfgkgkhkhfcojedpecedjdjjeceofmecigepelfm"
   • "31C2E1E4D78E6A11B88DFA803456A1FFA5"=dword:0x00000000

[HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server\
   Licensing Core]
   • "EnableConcurrentSessions"=dword:0x00000001



The following registry key is changed:

[HKLM\SYSTEM\CurrentControlSet\Control\Terminal Server]
   New value:
   • "fDenyTSConnections"=dword:0x00000000

 File details 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 Thursday, July 15, 2010
Description updated by Petre Galan on Tuesday, July 20, 2010

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