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Virus:Worm/Pinit.LM
Date discovered:20/05/2010
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:230.912 Bytes
MD5 checksum:e1c27eabd1fbb5d67ebd112b1c2bd973
IVDF version:7.10.07.145 - Thursday, May 20, 2010

 General Method of propagation:
   • Local network


Aliases:
   •  Sophos: Mal/Agent-AS
   •  Bitdefender: Trojan.Generic.KD.12782
   •  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%\iaoxpcnm



The following files are created:

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

%SYSDIR%\h7t.wt
%SYSDIR%\hgtd.ruy
%SYSDIR%\iaoxpcnm Further investigation pointed out that this file is malware, too. Detected as: TR/Patched.Gen2

%SYSDIR%\xohydwgtew
%SYSDIR%\nmklo.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.ZPACK.Gen




It tries to download some files:

– The location is the following:
   • http://adobecompany.co.uk/tpsa/**********


– The location is the following:
   • http://adobecompany.co.uk/tpsa/**********


– The location is the following:
   • http://polujopa.com/tpsa/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:0x00bbdf19
   • "31AC70412E939D72A9234CDEBB1AF5867B"="kgomncpjpnogoconproiodorqjqoqhqfrprgmlmlocrhrlqnogkrpcpipp"
   • "31C2E1E4D78E6A11B88DFA803456A1FFA5"=dword:0x00000000

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion]
   • "MID"="768B998032D24F5B884188F60F1552A62D029965BA8E41AEA90FA997C70822DA"

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

– [HKLM\SOFTWARE\1]
   • "31897356954C2CD3D41B221E3F24F99BBA"=dword:0x00bbdf19
   • "31AC70412E939D72A9234CDEBB1AF5867B"="nqrckqqlqdrqrirprhqoqrqdopoinfnhmjmqrjrjlmmrrrnpqgnonk"
   • "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

 Network Infection In order to ensure its propagation the malware attemps to connect to other machines as described below.


Exploit:
It makes use of the following Exploit:
– MS04-011 (LSASS Vulnerability)

 Backdoor The following port is opened:

– 174.36.1**********.1********** on TCP port 35524

 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 Tuesday, July 27, 2010
Description updated by Petre Galan on Tuesday, July 27, 2010

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