Virus: TR/Autoit.WM Date discovered: 20/01/2009 Type: Trojan In the wild: Yes Reported Infections: Low Distribution Potential: Low to medium Damage Potential: Medium Static file: Yes File size: 545.758 Bytes MD5 checksum: 123834811b7d6f9e1423f381e68d25a6 IVDF version: 7.01.01.152 - Tuesday, January 20, 2009
General Method of propagation: • Autorun feature Aliases: • Symantec: W32.Harakit • Kaspersky: Worm.Win32.AutoIt.xl • TrendMicro: WORM_HARAKIT.FC • Sophos: Sus/Tiotua-A • Avast: AutoIt:Balero-C • Microsoft: Worm:Win32/Autorun.XK • Eset: Win32/Tifaut.D Platforms / OS: • Windows 2000 • Windows XP • Windows 2003 • Windows Vista • Windows Server 2008 • Windows 7 Side effects: • Third party control • Downloads malicious files • Registry modification Files It copies itself to the following locations: • %SYSDIR% \csrcs.exe • %SYSDIR% \%random character string% .exe • C:\%random character string% \%random character string% \%gathered from the internet% .exe • %drive% \%random character string% .exe It copies itself within an archive to the following location: • C:\%random character string% \%random character string% \%gathered from the internet% .zip The following files are created: – %SYSDIR% \autorun.in This is a non malicious text file with the following content: • %code that runs malware% – %SYSDIR% \autorun.i This is a non malicious text file with the following content: • %code that runs malware% – %drive% \autorun.inf This is a non malicious text file with the following content: • %code that runs malware% It tries to download some files: – The location is the following: • http://95.211.21.184:804/z/**** It is saved on the local hard drive under: %SYSDIR% \cftu.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. – The location is the following: • http://95.211.21.184:89/**** It is saved on the local hard drive under: %SYSDIR% \RegShellSM.exe Furthermore this file gets executed after it was fully downloaded. Further investigation pointed out that this file is malware, too. – The location is the following: • http://thepiratebay.org/**** Registry The following registry key is added in order to run the process after reboot: – [HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices] • "csrcs"="%SYSDIR% \csrcs.exe" One of the following values is added in order to run the process after reboot: – [HKLM\Software\Microsoft\Windows\CurrentVersion\policies\Explorer\ Run] • "csrcs"="%SYSDIR% \csrcs.exe" The following registry key is added: – [HKLM\Software\Microsoft\DRM\amty] • "exp1"="408406541BC5BBE4DC197A2A0C46B9ACF2F90D96B151D7C7BCBD177741EE95F562E634D70EB70FB65FC8FBF3EC31261F" • "dreg"="408406541BC5BBE4DC197A2A0C46B9ACF2F90D96B151D7C7BCBD177641EE95F562E634D70EB70FB65FC8FBF0EC31261C8626D05B1ED70CC881A48DA07A7E1A99" • "fir"="x" • "kiu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• "giru"="noneed" • "gix"="noneed" • "rp2"="noneed" • "cb3"="noneed" • "bwp1"="noneed" The following registry keys are changed: – [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] Old value: • "Shell"="Explorer.exe" New value: • "Shell"="Explorer.exe csrcs.exe" – [HKLM\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\ Folder\Hidden\SHOWALL] Old value: • "CheckedValue"=dword:00000000 New value: • "CheckedValue"=dword:00000001 – [HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced] Old value: • "Hidden"=dword:00000001 • "SuperHidden"=dword:00000001 • "ShowSuperHidden"=dword:00000001 New value: • "Hidden"=dword:00000002 • "SuperHidden"=dword:00000000 • "ShowSuperHidden"=dword:00000000 Backdoor Contact server: The following: • http://www.5eb149c0.com:81/**** File details Runtime packer: In order to aggravate detection and reduce size of the file it is packed with the following runtime packer: • UPX
Description inserted by Irina Diaconescu on Tuesday, October 26, 2010 Description updated by Andrei Ivanes on Monday, November 1, 2010
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