Full description

Virus:	Worm/Pinit.RB
Date discovered:	01/08/2010
Type:	Worm
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Low
Damage Potential:	Low to medium
Static file:	Yes
File size:	176.128 Bytes
MD5 checksum:	f4858e44266d0729645240f66cb9e656
VDF version:	7.10.04.83
IVDF version:	7.10.10.26 - Sunday, August 1, 2010

General Aliases:
   • Sophos: Mal/Katusha-A
   • Bitdefender: Trojan.FakeAlert.CFQ
   • Panda: W32/Pinit.M.worm
   • Eset: Win32/Pinit.AF

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

Side effects:
   • Drops malicious files
   • Registry modification

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

It deletes the following files:
   • %SYSDIR%\user32.dll
   • %SYSDIR%\%random character string%

The following files are created:

– %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%\%random character string% Further investigation pointed out that this file is malware, too. Detected as: TR/Patched.Gen2

– %SYSDIR%\nmklo.dll Further investigation pointed out that this file is malware, too. Detected as: Worm/Pinit.MT

– %SYSDIR%\ff4h.gy

It tries to execute 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\3]
   • "31897356954C2CD3D41B221E3F24F99BBA"=dword:0x03f940aa
   • "31AC70412E939D72A9234CDEBB1AF5867B"="nqrckqqlqdrqrirprhqoqrqdopoinfnhmjmqrjrjlmmdmqrpmeqhmnng"
   • "31C2E1E4D78E6A11B88DFA803456A1FFA5"=dword:0x00000000

– [HKLM\SOFTWARE\1]
   • "31897356954C2CD3D41B221E3F24F99BBA"=dword:0x03f940aa
   • "31AC70412E939D72A9234CDEBB1AF5867B"="efipdhioiijnjpjcjmidigiggmgfgkgkhkhfcojedpemjgfcinfdff"
   • "31C2E1E4D78E6A11B88DFA803456A1FFA5"=dword:0x00000000

– [HKLM\SOFTWARE\9]
   • "31897356954C2CD3D41B221E3F24F99BBA"=dword:0x03f940aa
   • "31AC70412E939D72A9234CDEBB1AF5867B"="kgomncpjpnogoconproiodorqjqoqhqfrprgmlmlocrhrlqnogkrpcpipp"
   • "31C2E1E4D78E6A11B88DFA803456A1FFA5"=dword:0x00000000

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion]
   • "MID"="72C556A22C0B4086A2F19C5D1A919D184650EC06AF8B4F20AC8273DBD9A08067"

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

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

The following registry key is changed:

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

Miscellaneous Accesses internet resources:
   • http://silajopa.com/tpsa/gate/**********
   • http://perejopa.com/tpsa/gate/**********
   • http://nedojopa.com/tpsa/gate/**********
   • http://silajopa.com/tpsa/gate/**********

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

説明の挿入者 Petre Galan の 2011年2月1日火曜日
説明の更新者 Andrei Ivanes の 2011年2月3日木曜日

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