Date discovered:24/05/2011
In the wild:Yes
Reported Infections:Low
Distribution Potential:Low
Damage Potential:Low to medium
Static file:Yes
File size:334.848 Bytes
MD5 checksum:2363D1D5B33994F17131646D929B0E50
VDF version: - Tuesday, May 24, 2011
IVDF version: - Tuesday, May 24, 2011

 General Method of propagation:
   • No own spreading routine

   •  TrendMicro: TROJ_FAKEAV.SM29
   •  Sophos: Mal/FakeAV-EA
     Microsoft: Trojan:Win32/FakeSysdef

Platforms / OS:
   • Windows 2000
   • Windows XP
   • Windows 2003
    Windows Vista
    Windows 7

Side effects:
   • Drops files
    Falsely reports malware infection or system problems and offers to fix them if the user buys the application.
   • Lowers security settings
   • Registry modification
   • Pricetrap function - user is fooled into making a costly subscription

Right after execution the following information is displayed:

 Files It copies itself to the following location:
   • %ALLUSERSPROFILE%\Application Data\%random character string%.exe

It renames the following files:

      %ALLUSERSPROFILE%\Start Menu\%all subdirectories% into %TEMPDIR%\smtmp\1\*
      %APPDATA%\Microsoft\Internet Explorer\Quick Launch\* into %TEMPDIR%\smtmp\2\*

It deletes the initially executed copy of itself.

The following file is created:

%ALLUSERSPROFILE%\Application Data\%number%.exe Further investigation pointed out that this file is malware, too. Detected as: TR/FakeSysdef.A.1023

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

   • "%random character string%"="%ALLUSERSPROFILE%\Application Data\%random character string%.exe"

The following registry keys are added:

[HKCU\Software\Microsoft\Internet Explorer\Download]
   • "CheckExeSignatures"="no"

   • "DisableTaskMgr"=dword:00000001

   • "DisableTaskMgr"=dword:0000000

   • "ShowSuperHidden"=dword:00000000
   • "Hidden"=dword:00000000

   • "NoChangingWallPaper"=dword:00000001

   • "75fa38b7-8b94-4995-ad32-52e938867954"=""

   • "NoDesktop"=dword:00000001

   • "NoChangingWallPaper"=dword:00000001

   • "LowRiskFileTypes"="/{hq:/s`s:/ogn:/uyu:/dyd:/c`u:/bnl:/ble:/sdf:/lrh:/iul:/iulm:/fhg:/clq:/kqf:/`wh:/lqf:/lqdf:/lnw:/lq2:/l2t:/v`w:/rbs:"

 Miscellaneous Accesses internet resources:
   • **********p://findconsonant.org/pica1/516-direct
   • **********p://searchafternoon.org/404.php?type=stats&affid=516&subid=02&awok
   • **********p://searchbottle.org/pica1/516-direct

It creates the following Mutex:
   • 86e8a495-357c-437c-b6e9-13e757bfabab

 File details Programming language:
The malware program was written in MS Visual C++.

Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with the following runtime packer:
   • UPX

説明の挿入者 Andrei Ilie の 2011年8月25日木曜日
説明の更新者 Andrei Ilie の 2011年8月26日金曜日

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