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Virus:Worm/Pinit.LA
Date discovered:05/05/2010
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:187.392 Bytes
MD5 checksum:638801b85ccd70f54fea8b4bffe86bc2
IVDF version:7.10.07.42 - Wednesday, May 5, 2010

 General Method of propagation:
   • Local network


Aliases:
   •  Sophos: Mal/EncPk-OC
   •  Bitdefender: Trojan.Generic.KD.10255
   •  Panda: W32/Pinit.J.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 files:
   • %TEMPDIR%\tmp6.tmp
   • %TEMPDIR%\tmp5.tmp
   • %TEMPDIR%\tmp4.tmp
   • %SYSDIR%\clgd



The following files are created:

%SYSDIR%\user32.dll
%TEMPDIR%\tmp6.tmp
%SYSDIR%\dllcache\user32.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Patched.Gen2

%SYSDIR%\hgtd.ruy
%SYSDIR%\h7t.wt
%SYSDIR%\xwxn
%TEMPDIR%\tmp5.tmp
%TEMPDIR%\tmp4.tmp
%SYSDIR%\nmklo.dll Further investigation pointed out that this file is malware, too. Detected as: Worm/Pinit.IT.2

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




It tries to download some files:

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


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




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\1]
   • "31AC70412E939D72A9234CDEBB1AF5867B"="efipdhioiijnjpjcjmidigiggmgfgkgkhkhfcojedpemjgfcinfdff"

– [HKLM\SOFTWARE\9]
   • "31AC70412E939D72A9234CDEBB1AF5867B"="nqrckqqlqdrqrirprhqoqrqdopoinfnhmjmqrjrjlmmrmrnpmqqhnqnknj"

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion]
   • "MID"="B335FB1C6E064B5A931A63C8F03C717F7C96159DACC443459539445B697950D9"

 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)

 File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

说明添加者: Petre Galan 打开 2010年8月20日星期五
说明更新者: Petre Galan 打开 2010年8月20日星期五

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