Trojan.PWS.Siggen1.64616

Technical Information

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'SYS_UPDATE_E394ED5BDD82C1848A9F07C' = '%APPDATA%\WinRAR\sysfugnh.exe'

Malicious functions:

Creates and executes the following:

'%TEMP%\4391865.exe' (downloaded from the Internet)

Executes the following:

'%TEMP%\4391865.exe'
'<SYSTEM32>\cmd.exe' /c del "<Full path to file>" > NUL
'%APPDATA%\WinRAR\sysfugnh.exe'

Searches for registry branches where third party applications store passwords:

[<HKLM>\SOFTWARE\Robo-FTP 3.7\FTPServers]
[<HKCU>\SOFTWARE\Robo-FTP 3.7\Scripts]
[<HKCU>\SOFTWARE\Robo-FTP 3.7\FTPServers]
[<HKLM>\Software\South River Technologies\WebDrive\Connections]
[<HKCU>\Software\FlashPeak\BlazeFtp\Settings]
[<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]
[<HKCU>\Software\FTPClient\Sites]
[<HKLM>\Software\FTPClient\Sites]
[<HKLM>\SOFTWARE\NCH Software\Fling\Accounts]
[<HKCU>\Software\NCH Software\ClassicFTP\FTPAccounts]
[<HKCU>\SOFTWARE\NCH Software\Fling\Accounts]
[<HKLM>\Software\Martin Prikryl]
[<HKCU>\Software\South River Technologies\WebDrive\Connections]
[<HKCU>\Software\Martin Prikryl]
[<HKCU>\Software\SoftX.org\FTPClient\Sites]
[<HKLM>\Software\SoftX.org\FTPClient\Sites]
[<HKLM>\Software\RIT\The Bat!\Users depot]
[<HKCU>\Software\Microsoft\Internet Account Manager\Accounts]
[<HKLM>\Software\RIT\The Bat!]
[<HKCU>\Software\RIT\The Bat!]
[<HKCU>\Software\RIT\The Bat!\Users depot]
[<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Microsoft Outlook Internet Settings]
[<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook]
[<HKCU>\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
[<HKCU>\Identities\{5518F2FB-DB74-45A3-BEC1-4575D8D9DC84}\Software\Microsoft\Internet Account Manager\Accounts]
[<HKLM>\Software\Microsoft\Internet Account 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\RimArts\B2\Settings]
[<HKLM>\Software\RimArts\B2\Settings]
[<HKCU>\Software\Microsoft\Windows Mail]
[<HKLM>\Software\Nico Mak Computing\WinZip\mru\jobs]
[<HKCU>\Software\Microsoft\Windows Live Mail]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 8 Professional\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 9\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 8 Home\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 7 Home\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 7 Professional\QCToolbar]
[<HKLM>\Software\FlashFXP]
[<HKCU>\Software\FileZilla]
[<HKLM>\Software\FlashFXP\3]
[<HKCU>\Software\FlashFXP\3]
[<HKCU>\Software\FlashFXP]
[<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]
[<HKCU>\Software\FTPWare\COREFTP\Sites]
[<HKCU>\Software\FTP Explorer\FTP Explorer\Workspace\MFCToolBar-224]
[<HKCU>\Software\CoffeeCup Software\Internet\Profiles]
[<HKCU>\Software\Sota\FFFTP]
[<HKCU>\Software\Sota\FFFTP\Options]
[<HKCU>\Software\ExpanDrive\Sessions]
[<HKLM>\Software\NCH Software\ClassicFTP\FTPAccounts]
[<HKCU>\Software\Cryer\WebSitePublisher]
[<HKCU>\Software\FTP Explorer\Profiles]
[<HKCU>\Software\VanDyke\SecureFX]
[<HKCU>\Software\BPFTP\Bullet Proof FTP\Main]
[<HKCU>\Software\BulletProof Software\BulletProof FTP Client\Main]
[<HKLM>\Software\FileZilla Client]
[<HKCU>\Software\FileZilla Client]
[<HKLM>\Software\FileZilla]
[<HKCU>\Software\TurboFTP]
[<HKLM>\Software\TurboFTP]
[<HKCU>\Software\BPFTP]
[<HKCU>\Software\BPFTP\Bullet Proof FTP\Options]
[<HKCU>\Software\BulletProof Software\BulletProof FTP Client\Options]