Full description

Virus:	TR/PSW.Magania.dbsg
Date discovered:	15/04/2010
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:	189.952 Bytes
MD5 checksum:	a84f02768dd7f4bd9404dfb33badd045
IVDF version:	7.10.06.110 - Thursday, April 15, 2010

General Method of propagation:
   • Autorun feature

Aliases:
   • Sophos: Mal/Taterf-B
   • Bitdefender: Trojan.Onlinegames.814
   • Panda: W32/Lineage.LLT
   • Eset: Win32/PSW.OnLineGames.OUM

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

Side effects:
   • Lowers security settings
   • Downloads malicious files
   • Drops malicious files
   • Registry modification

Files It copies itself to the following locations:
   • %drive%\abqj61fm.exe
   • %SYSDIR%\cyban.exe

It deletes the initially executed copy of itself.

It deletes the following files:
   • %SYSDIR%\cyban0.dll
   • %TEMPDIR%\ah.exe
   • %TEMPDIR%\ah1.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%\ah1.rar
– %TEMPDIR%\ah.exe
– %SYSDIR%\cyban0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/PSW.Magania.dbsi

– %SYSDIR%\nodabc0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.ASPM.Gen

– %SYSDIR%\ieban0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/PSW.Magania.dbsk

– %SYSDIR%\nodabc.exe Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.ASPM.Gen

– %SYSDIR%\nodie0.dll Further investigation pointed out that this file is malware, too. Detected as: TR/Crypt.ASPM.Gen

– %temporary internet files%\ah1[1].rar
– %temporary internet files%\ah[1].rar

It tries to download some files:

– The location is the following:
   • http://www.googlevmk.com/1hg/**********

– The location is the following:
   • http://www.googlecbm.com/1hg/**********

It tries to executes the following files:

– Filename:
   • %SYSDIR%\regsvr32.exe /s %SYSDIR%\ieban0.dll

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

– Filename:
   • "%TEMPDIR%\ah.exe"

– Filename:
   • %SYSDIR%\regsvr32.exe /s %SYSDIR%\nodie0.dll

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

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
   • "cybansos"="%SYSDIR%\cyban.exe"
   • "nodsos"="%SYSDIR%\nodabc.exe"

The following registry keys are added:

– [HKLM\SOFTWARE\Classes\TypeLib\
   {5DA7432B-6725-4ADE-BF17-C328743011FD}\1.0\FLAGS]
   • "@"="0"

– [HKLM\SOFTWARE\Classes\CLSID\{5DA743EA-6725-4ADE-BF17-C328743011FD}\
   InprocServer32]
   • "@"="%SYSDIR%\nodie0.dll"
   • "ThreadingModel"="Apartment"

– [HKLM\SOFTWARE\Classes\Interface\
   {5DA743EB-6725-4ADE-BF17-C328743011FD}\ProxyStubClsid]
   • "@"="{00020424-0000-0000-C000-000000000046}"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {5DA7432B-6725-4ADE-BF17-C328743011FD}\1.0\0\win32]
   • "@"="%SYSDIR%\nodie0.dll"

– [HKLM\SOFTWARE\Classes\CLSID\
   {7F23592B-8F2C-4C08-83A8-BBE01BF9CC64}]
   • "@"="IEHlprObj Class"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {7F235922-8F2C-4C08-83A8-BBE01BF9CC64}\1.0]
   • "@"="IEHelper 1.0 Type Library"

– [HKLM\SOFTWARE\Classes\Interface\
   {5DA743EB-6725-4ADE-BF17-C328743011FD}]
   • "@"="IIEHlprObj"

– [HKLM\SOFTWARE\Classes\CLSID\{7F23592B-8F2C-4C08-83A8-BBE01BF9CC64}\
   VersionIndependentProgID]
   • "@"="IEHlprObj.IEHlprObj"

– [HKLM\SOFTWARE\Classes\CLSID\
   {5DA743EA-6725-4ADE-BF17-C328743011FD}]
   • "@"="IEHlprObj Class"

– [HKLM\SOFTWARE\Classes\Interface\
   {5DA743EB-6725-4ADE-BF17-C328743011FD}\ProxyStubClsid32]
   • "@"="{00020424-0000-0000-C000-000000000046}"

– [HKLM\SOFTWARE\Classes\IEHlprObj.IEHlprObj\CurVer]
   • "@"="IEHlprObj.IEHlprObj.1"

– [HKLM\SOFTWARE\Classes\Interface\
   {7F23592C-8F2C-4C08-83A8-BBE01BF9CC64}\ProxyStubClsid32]
   • "@"="{00020424-0000-0000-C000-000000000046}"

– [HKLM\SOFTWARE\Classes\IEHlprObj.IEHlprObj]
   • "@"="IEHlprObj Class"

– [HKLM\SOFTWARE\Classes\CLSID\MNDOWN]
   • "urlinfo"="chhjmf.y"

– [HKLM\SOFTWARE\Classes\CLSID\{5DA743EA-6725-4ADE-BF17-C328743011FD}\
   ProgID]
   • "@"="IEHlprObj.IEHlprObj.1"

– [HKLM\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1\CLSID]
   • "@"="{5DA743EA-6725-4ADE-BF17-C328743011FD}"

– [HKLM\SOFTWARE\Classes\Interface\
   {7F23592C-8F2C-4C08-83A8-BBE01BF9CC64}\TypeLib]
   • "@"="{7F235922-8F2C-4C08-83A8-BBE01BF9CC64}"
   • "Version"="1.0"

– [HKLM\SOFTWARE\Classes\Interface\
   {7F23592C-8F2C-4C08-83A8-BBE01BF9CC64}\ProxyStubClsid]
   • "@"="{00020424-0000-0000-C000-000000000046}"

– [HKLM\SOFTWARE\Classes\IEHlprObj.IEHlprObj.1]
   • "@"="IEHlprObj Class"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {7F235922-8F2C-4C08-83A8-BBE01BF9CC64}\1.0\0\win32]
   • "@"="%SYSDIR%\ieban0.dll"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {7F235922-8F2C-4C08-83A8-BBE01BF9CC64}\1.0\FLAGS]
   • "@"="0"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {5DA7432B-6725-4ADE-BF17-C328743011FD}\1.0]
   • "@"="IEHelper 1.0 Type Library"

– [HKLM\SOFTWARE\Classes\Interface\
   {5DA743EB-6725-4ADE-BF17-C328743011FD}\TypeLib]
   • "@"="{5DA7432B-6725-4ADE-BF17-C328743011FD}"
   • "Version"="1.0"

– [HKLM\SOFTWARE\Classes\Interface\
   {7F23592C-8F2C-4C08-83A8-BBE01BF9CC64}]
   • "@"="IIEHlprObj"

– [HKLM\SOFTWARE\Classes\CLSID\{7F23592B-8F2C-4C08-83A8-BBE01BF9CC64}\
   ProgID]
   • "@"="IEHlprObj.IEHlprObj.1"

– [HKLM\SOFTWARE\Classes\CLSID\{5DA743EA-6725-4ADE-BF17-C328743011FD}\
   VersionIndependentProgID]
   • "@"="IEHlprObj.IEHlprObj"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {5DA7432B-6725-4ADE-BF17-C328743011FD}\1.0\HELPDIR]
   • "@"="%SYSDIR%\"

– [HKLM\SOFTWARE\Classes\TypeLib\
   {7F235922-8F2C-4C08-83A8-BBE01BF9CC64}\1.0\HELPDIR]
   • "@"="%SYSDIR%\"

– [HKLM\SOFTWARE\Classes\CLSID\{7F23592B-8F2C-4C08-83A8-BBE01BF9CC64}\
   InprocServer32]
   • "@"="%SYSDIR%\ieban0.dll"
   • "ThreadingModel"="Apartment"

The following registry keys are changed:

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced]
   New value:
   • "Hidden"=dword:0x00000002
   • "ShowSuperHidden"=dword:0x00000000

– [HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer]
   New value:
   • "NoDriveTypeAutoRun"=dword:0x00000091

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   New value:
   • "CheckedValue"=dword:0x00000000

Injection – It injects the following file into a process: %SYSDIR%\cyban0.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: %SYSDIR%\nodabc0.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8月3日火曜日
説明の更新者 Petre Galan の 2010年8月3日火曜日

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