Full description

Virus:	TR/Autoit.abc.4
Date discovered:	22/10/2009
Type:	Trojan
In the wild:	Yes
Reported Infections:	Low
Distribution Potential:	Low to medium
Damage Potential:	Low to medium
Static file:	Yes
File size:	696.089 Bytes
MD5 checksum:	52776e4710c0fb306a12cc53264f2f21
IVDF version:	7.01.06.139 - Thursday, October 22, 2009

General Aliases:
   • Mcafee: W32/Renocide
   • Panda: W32/Harakit.D
   • Eset: Win32/AutoRun.Autoit.BT
   • Bitdefender: Trojan.Generic.2600459

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

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

Files It copies itself to the following location:
   • %SYSDIR%\csrcs.exe

It deletes the initially executed copy of itself.

It deletes the following file:
   • C:\Temp\suicide.bat

The following files are created:

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

– %TEMPDIR%\suicide.bat Furthermore it gets executed after it was fully created. This batch file is used to delete a file.

Registry The following registry keys are added:

– [HKLM\Software\Microsoft\DRM\amty]
   • "dreg"="408406541BC5BBE4DC197A2A0C46B9ACF2F90D96B151D7C7BCBD177641EE95F562E634D70EB70FB65FC8FBF0EC31261C8626D05B1ED70CC881A48DA07A7E1A99"
   • "exp1"="408406541BC5BBE4DC197A2A0C46B9A9F2F90D96B151D7C7BCBD177641EE95F6"
   • "fix"=""
   • "fix1"="1"
   • "ilop"="1"

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\
   Run]
   • "csrcs"="%SYSDIR%\csrcs.exe"

The following registry keys are changed:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
   New value:
   • "Shell"="Explorer.exe csrcs.exe"

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

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Advanced\
   Folder\Hidden\SHOWALL]
   New value:
   • "CheckedValue"=dword:0x00000001

Backdoor The following ports are opened:

– uyhnmk.jp**********.ph on TCP port 7872
– 3h58gkl6.tr**********.com on TCP port 9392

Miscellaneous Checks for an internet connection by contacting the following web sites:
• http://www.whatismyip.com/automation/**********
• http://checkip.d**********/?rnd1=64403.1400432929&rnd2=49465.6987388073

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3月11日木曜日
説明の更新者 Petre Galan の 2010年3月12日金曜日

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