Full description

Virus:	TR/PSW.Magania.czpe
Date discovered:	22/03/2010
Type:	Trojan
In the wild:	Yes
Reported Infections:	Low to medium
Distribution Potential:	Low to medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	114.688 Bytes
MD5 checksum:	59ba42e89422164c215a9891bb283b16
IVDF version:	7.10.05.158 - Monday, March 22, 2010

General Method of propagation:
   • Autorun feature

Aliases:
   • Mcafee: Generic PWS.y
   • Bitdefender: Trojan.Downloader.JIRG
   • Panda: W32/Gamania.MH
   • Eset: Win32/PSW.OnLineGames.NWF

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 locations:
   • %drive%\puia6h.exe
   • %TEMPDIR%\xvassdf.exe

It deletes the initially executed copy of itself.

It deletes the following files:
   • %TEMPDIR%\4tddfwq0.dll
   • %TEMPDIR%\ar.exe
   • %TEMPDIR%\ar1.rar

The following files are created:

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

– %TEMPDIR%\ar.exe
– %TEMPDIR%\4tddfwq0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/PSW.Magania.czpf

– %TEMPDIR%\ar1.rar
– %TEMPDIR%\doscp0.dll
– %TEMPDIR%\doscp.exe

It tries to download some files:

– The location is the following:
   • http://www.baiduplk.com/1rb/**********

– The location is the following:
   • http://www.yahoosd3.com/1rb/**********

It tries to execute the following files:

– Filename:
   • "%PROGRAM FILES%\Internet Explorer\IEXPLORE.EXE"

– Filename:
   • "%TEMPDIR%\ar.exe"

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

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "54dfsger"="%TEMPDIR%\xvassdf.exe"
   • "doscp"="%TEMPDIR%\doscp.exe"

The following registry key is added:

– [HKLM\SOFTWARE\Classes\CLSID\MADOWN]
   • "urlinfo"="tyily.i"

Injection – It injects the following file into a process: %TEMPDIR%\4tddfwq0.dll

    Process name:
   • explorer.exe

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

    Process name:
   • iexplore.exe

– It injects the following file into a process: %TEMPDIR%\doscp0.dll

    Process name:
   • explorer.exe

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 2010年9月17日金曜日
説明の更新者 Petre Galan の 2010年9月17日金曜日

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