Trojan.PWS.Siggen1.64763

Technical Information

Malicious functions:

To complicate detection of its presence in the operating system,

forces the system hide from view:

hidden files

Executes the following:

'%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holdermail.txt"
'%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe' /stext "%TEMP%\holderwb.txt"
'<SYSTEM32>\schtasks.exe' /Create /TN "Update\conhost" /XML "%TEMP%\z220"
'%TEMP%\ikeji.exeikeji.exe'

Injects code into

the following system processes:

%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe

Searches for registry branches where third party applications store passwords:

[<HKLM>\Software\SimonTatham\PuTTY\Sessions]
[<HKCU>\Software\CoffeeCup Software]
[<HKCU>\Software\SimonTatham\PuTTY\Sessions]
[<HKLM>\SOFTWARE\Robo-FTP 3.7\Scripts]
[<HKCU>\Software\LinasFTP\Site Manager]
[<HKLM>\Software\Nico Mak Computing\WinZip\FTP]
[<HKCU>\Software\Nico Mak Computing\WinZip\mru\jobs]
[<HKCU>\Software\Nico Mak Computing\WinZip\FTP]
[<HKLM>\Software\CoffeeCup Software]
[<HKCU>\Software\MAS-Soft\FTPInfo\Setup]
[<HKCU>\SOFTWARE\Robo-FTP 3.7\Scripts]
[<HKCU>\Software\Martin Prikryl]
[<HKLM>\Software\Martin Prikryl]
[<HKLM>\Software\SoftX.org\FTPClient\Sites]
[<HKLM>\Software\FTPClient\Sites]
[<HKCU>\Software\SoftX.org\FTPClient\Sites]
[<HKCU>\SOFTWARE\Robo-FTP 3.7\FTPServers]
[<HKLM>\SOFTWARE\Robo-FTP 3.7\FTPServers]
[<HKCU>\Software\FlashPeak\BlazeFtp\Settings]
[<HKCU>\Software\South River Technologies\WebDrive\Connections]
[<HKLM>\Software\South River Technologies\WebDrive\Connections]
[<HKLM>\Software\Nico Mak Computing\WinZip\mru\jobs]
[<HKCU>\Software\Google\Google Talk\Accounts]
[<HKCU>\Identities\{5518F2FB-DB74-45A3-BEC1-4575D8D9DC84}\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
[<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook]
[<HKCU>\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
[<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Microsoft Outlook Internet Settings]
[<HKCU>\Software\Far\Plugins\FTP\Hosts]
[<HKCU>\Software\Far2\Plugins\FTP\Hosts]
[<HKCU>\Software\Microsoft\IdentityCRL]
[<HKCU>\Software\Microsoft\MSNMessenger]
[<HKCU>\Software\Yahoo\Pager]
[<HKLM>\Software\Microsoft\Internet Account Manager]
[<HKLM>\Software\RimArts\B2\Settings]
[<HKCU>\Software\RIT\The Bat!]
[<HKCU>\Software\RimArts\B2\Settings]
[<HKCU>\Software\Microsoft\Windows Live Mail]
[<HKCU>\Software\Microsoft\Windows Mail]
[<HKCU>\Software\Microsoft\Internet Account Manager\Accounts]
[<HKCU>\Identities\{5518F2FB-DB74-45A3-BEC1-4575D8D9DC84}\Software\Microsoft\Internet Account Manager\Accounts]
[<HKLM>\Software\RIT\The Bat!\Users depot]
[<HKCU>\Software\RIT\The Bat!\Users depot]
[<HKLM>\Software\RIT\The Bat!]
[<HKCU>\Software\FlashFXP\3]
[<HKCU>\Software\FlashFXP]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 8 Professional\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 7 Professional\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 8 Home\QCToolbar]
[<HKCU>\Software\FileZilla Client]
[<HKLM>\Software\FileZilla]
[<HKCU>\Software\FileZilla]
[<HKLM>\Software\FlashFXP\3]
[<HKLM>\Software\FlashFXP]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 7 Home\QCToolbar]
[<HKCU>\Software\Far Manager\SavedDialogHistory\FTPHost]
[<HKCU>\Software\Ghisler\Windows Commander]
[<HKCU>\Software\Far2\SavedDialogHistory\FTPHost]
[<HKCU>\Software\Far Manager\Plugins\FTP\Hosts]
[<HKCU>\Software\Far\SavedDialogHistory\FTPHost]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 6 Home\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 6 Professional\QCToolbar]
[<HKLM>\Software\Ghisler\Total Commander]
[<HKLM>\Software\Ghisler\Windows Commander]
[<HKCU>\Software\Ghisler\Total Commander]
[<HKLM>\Software\FileZilla Client]
[<HKCU>\Software\Cryer\WebSitePublisher]
[<HKCU>\Software\ExpanDrive\Sessions]
[<HKCU>\Software\VanDyke\SecureFX]
[<HKCU>\Software\FTP Explorer\FTP Explorer\Workspace\MFCToolBar-224]
[<HKCU>\Software\FTP Explorer\Profiles]
[<HKLM>\SOFTWARE\NCH Software\Fling\Accounts]
[<HKCU>\Software\FTPClient\Sites]
[<HKCU>\SOFTWARE\NCH Software\Fling\Accounts]
[<HKLM>\Software\NCH Software\ClassicFTP\FTPAccounts]
[<HKCU>\Software\NCH Software\ClassicFTP\FTPAccounts]
[<HKCU>\Software\FTPWare\COREFTP\Sites]
[<HKCU>\Software\BulletProof Software\BulletProof FTP Client\Options]
[<HKCU>\Software\BPFTP]
[<HKCU>\Software\BPFTP\Bullet Proof FTP\Options]
[<HKCU>\Software\BPFTP\Bullet Proof FTP\Main]
[<HKCU>\Software\BulletProof Software\BulletProof FTP Client\Main]
[<HKCU>\Software\Sota\FFFTP\Options]
[<HKCU>\Software\CoffeeCup Software\Internet\Profiles]
[<HKCU>\Software\Sota\FFFTP]
[<HKCU>\Software\TurboFTP]
[<HKLM>\Software\TurboFTP]

Modifies file system:

Creates the following files:

%TEMP%\Cab15.tmp
%APPDATA%\svchost
%TEMP%\Cab13.tmp
%TEMP%\CabF.tmp
%TEMP%\Cab11.tmp
%TEMP%\z220
%TEMP%\holdermail.txt
%TEMP%\holderwb.txt
%APPDATA%\pidloc.txt
%TEMP%\ikeji.exeikeji.exe
%APPDATA%\pid.txt
%APPDATA%\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015
%TEMP%\Cab1.tmp
%APPDATA%\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015
%APPDATA%\Microsoft\CryptnetUrlCache\MetaData\2BF68F4714092295550497DD56F57004
%APPDATA%\Microsoft\CryptnetUrlCache\Content\2BF68F4714092295550497DD56F57004
%TEMP%\Cab3.tmp
%TEMP%\CabB.tmp
%TEMP%\CabD.tmp
%TEMP%\Cab9.tmp
%TEMP%\Cab5.tmp
%TEMP%\Cab7.tmp

Deletes the following files:

%TEMP%\Cab13.tmp
%TEMP%\Cab11.tmp
%TEMP%\CabF.tmp
%TEMP%\Cab15.tmp
%TEMP%\holderwb.txt
%TEMP%\holdermail.txt
%TEMP%\z220
%TEMP%\Cab5.tmp
%TEMP%\Cab3.tmp
%TEMP%\Cab1.tmp
%TEMP%\Cab7.tmp
%TEMP%\CabD.tmp
%TEMP%\CabB.tmp
%TEMP%\Cab9.tmp

Network activity:

Connects to:

'cv####1.tmweb.ru':80
'wh#####yipaddress.com':80
'ma##.gandi.net':587
'wp#d':80
'www.download.windowsupdate.com':80
'ca#####.digicert.com':80

TCP:

HTTP GET requests:

http://ca#####.digicert.com/DigiCertAssuredIDRootCA.crt
http://wh#####yipaddress.com/
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
http://11#.#11.111.1/wpad.dat via wp#d
http://www.download.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootseq.txt

HTTP POST requests:

http://cv####1.tmweb.ru/stevo/gate.php

UDP:

DNS ASK cv####1.tmweb.ru
DNS ASK wh#####yipaddress.com
DNS ASK ma##.gandi.net
DNS ASK wp#d
DNS ASK www.download.windowsupdate.com
DNS ASK ca#####.digicert.com

Miscellaneous:

Searches for the following windows:

ClassName: 'Shell_TrayWnd' WindowName: ''

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