Trojan.Siggen9.35866

Technical Information

To ensure autorun and distribution

Creates or modifies the following files

<SYSTEM32>\tasks\windows update 6ae8eedc
<SYSTEM32>\tasks\windows update 22074eed
<SYSTEM32>\tasks\windows update 7e71d810
<SYSTEM32>\tasks\windows update e334b5d8
<SYSTEM32>\tasks\windows update d5098d1a

Malicious functions

Installs hooks to intercept notifications

on keystrokes:

Handler for all processes: %PROGRAMDATA%\10205cb3f4d3\13235fb0f7d0.dat

Searches for registry branches where third party applications store passwords

[<HKCU>\Software\Far\Plugins\FTP\Hosts]
[<HKCU>\Software\SimonTatham\PuTTY\Sessions]
[<HKCU>\Software\LinasFTP\Site Manager]
[<HKLM>\SOFTWARE\Robo-FTP 3.7\Scripts]
[<HKLM>\SOFTWARE\Wow6432Node\Robo-FTP 3.7\Scripts]
[<HKCU>\SOFTWARE\Robo-FTP 3.7\Scripts]
[<HKLM>\SOFTWARE\Wow6432Node\Robo-FTP 3.7\FTPServers]
[<HKCU>\SOFTWARE\Robo-FTP 3.7\FTPServers]
[<HKCU>\Software\FlashPeak\BlazeFtp\Settings]
[<HKLM>\Software\Wow6432Node\South River Technologies\WebDrive\Connections]
[<HKLM>\Software\Wow6432Node\Martin Prikryl]
[<HKCU>\Software\CoffeeCup Software]
[<HKCU>\Software\Martin Prikryl]
[<HKLM>\Software\Wow6432Node\SoftX.org\FTPClient\Sites]
[<HKCU>\Software\SoftX.org\FTPClient\Sites]
[<HKLM>\Software\Wow6432Node\FTPClient\Sites]
[<HKCU>\Software\FTPClient\Sites]
[<HKLM>\SOFTWARE\Wow6432Node\NCH Software\Fling\Accounts]
[<HKCU>\SOFTWARE\NCH Software\Fling\Accounts]
[<HKCU>\Software\NCH Software\ClassicFTP\FTPAccounts]
[<HKCU>\Software\South River Technologies\WebDrive\Connections]
[<HKCU>\Software\BulletProof Software\BulletProof FTP Client\Options]
[<HKLM>\Software\Wow6432Node\CoffeeCup Software]
[<HKCU>\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts]
[<HKLM>\Software\Microsoft\Internet Account Manager]
[<HKLM>\Software\Wow6432Node\Microsoft\Internet Account Manager]
[<HKCU>\Identities\{91255D00-95D9-49F5-8E84-7C027F5283B7}\Software\Microsoft\Internet Account Manager\Accounts]
[<HKCU>\Software\Microsoft\Internet Account Manager\Accounts]
[<HKLM>\Software\RIT\The Bat!\Users depot]
[<HKLM>\Software\Wow6432Node\RIT\The Bat!\Users depot]
[<HKLM>\Software\RIT\The Bat!]
[<HKLM>\Software\Wow6432Node\RIT\The Bat!]
[<HKLM>\Software\Wow6432Node\NCH Software\ClassicFTP\FTPAccounts]
[<HKLM>\Software\Wow6432Node\SimonTatham\PuTTY\Sessions]
[<HKLM>\Software\RimArts\B2\Settings]
[<HKLM>\Software\Wow6432Node\RimArts\B2\Settings]
[<HKCU>\Software\RimArts\B2\Settings]
[<HKCU>\Software\Microsoft\Windows Mail]
[<HKCU>\Software\Microsoft\Windows Live Mail]
[<HKLM>\Software\Wow6432Node\Nico Mak Computing\WinZip\mru\jobs]
[<HKCU>\Software\Nico Mak Computing\WinZip\mru\jobs]
[<HKLM>\Software\Wow6432Node\Nico Mak Computing\WinZip\FTP]
[<HKCU>\Software\Nico Mak Computing\WinZip\FTP]
[<HKCU>\Software\RIT\The Bat!]
[<HKCU>\Software\MAS-Soft\FTPInfo\Setup]
[<HKCU>\Software\ExpanDrive\Sessions]
[<HKCU>\Software\Cryer\WebSitePublisher]
[<HKCU>\Software\VanDyke\SecureFX]
[<HKLM>\Software\Wow6432Node\Ghisler\Total Commander]
[<HKCU>\Software\FlashFXP\3]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 9\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 8 Professional\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 8 Home\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 7 Professional\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 7 Home\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 6 Professional\QCToolbar]
[<HKCU>\Software\GlobalSCAPE\CuteFTP 6 Home\QCToolbar]
[<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Microsoft Outlook Internet Settings]
[<HKLM>\Software\Wow6432Node\FlashFXP\3]
[<HKCU>\Software\Ghisler\Total Commander]
[<HKLM>\Software\Ghisler\Windows Commander]
[<HKLM>\Software\Wow6432Node\Ghisler\Windows Commander]
[<HKCU>\Software\Ghisler\Windows Commander]
[<HKCU>\Software\Far Manager\SavedDialogHistory\FTPHost]
[<HKCU>\Software\Far2\SavedDialogHistory\FTPHost]
[<HKCU>\Software\Far\SavedDialogHistory\FTPHost]
[<HKCU>\Software\Far Manager\Plugins\FTP\Hosts]
[<HKCU>\Software\Far2\Plugins\FTP\Hosts]
[<HKLM>\Software\Ghisler\Total Commander]
[<HKCU>\Software\RIT\The Bat!\Users depot]
[<HKLM>\Software\FlashFXP\3]
[<HKCU>\Software\FileZilla]
[<HKLM>\Software\Wow6432Node\FlashFXP]
[<HKCU>\Software\FTP Explorer\Profiles]
[<HKCU>\Software\FTP Explorer\FTP Explorer\Workspace\MFCToolBar-224]
[<HKCU>\Software\FTPWare\COREFTP\Sites]
[<HKCU>\Software\CoffeeCup Software\Internet\Profiles]
[<HKCU>\Software\Sota\FFFTP\Options]
[<HKCU>\Software\Sota\FFFTP]
[<HKLM>\Software\TurboFTP]
[<HKLM>\Software\Wow6432Node\TurboFTP]
[<HKLM>\Software\FlashFXP]
[<HKCU>\Software\TurboFTP]
[<HKCU>\Software\FlashFXP]
[<HKCU>\Software\BPFTP\Bullet Proof FTP\Options]
[<HKCU>\Software\BulletProof Software\BulletProof FTP Client\Main]
[<HKCU>\Software\BPFTP\Bullet Proof FTP\Main]
[<HKLM>\Software\FileZilla Client]
[<HKLM>\Software\Wow6432Node\FileZilla Client]
[<HKLM>\Software\FileZilla]
[<HKLM>\Software\Wow6432Node\FileZilla]
[<HKCU>\Software\FileZilla Client]
[<HKCU>\Software\BPFTP]
[<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook]

Reads files which store third party applications passwords

%APPDATA%\opera software\opera stable\login data
%APPDATA%\mozilla\firefox\profiles.ini
%LOCALAPPDATA%\google\chrome\user data\default\web data
%LOCALAPPDATA%\google\chrome\user data\default\login data
%APPDATA%\thunderbird\profiles.ini

Brute-forces OS accounts.

Modifies file system

Creates the following files

%TEMP%\a574.tmp
%TEMP%\a585.tmp
%TEMP%\b584.tmp
%PROGRAMDATA%\10205cb3f4d3\13235fb0f7d0.dat

Deletes the following files

%TEMP%\noegamdjkhphikma

Moves the following files

from %TEMP%\b584.tmp to %TEMP%\noegamdjkhphikma

Deletes itself.

Network activity

TCP

HTTP GET requests

http://94.##6.35.48/viewtopic.php?f5##############
http://94.##6.35.48/viewtopic.php?f5########################################
http://94.##6.35.48/viewtopic.php?f5##########################################

HTTP POST requests

http://18#.#77.59.8/index.php

'bl###chain.info':443

'bl#######n.coinmarketcap.com':443

'ap#.##ockcypher.com':443

UDP

DNS ASK bl###chain.info
DNS ASK bl#######n.coinmarketcap.com
DNS ASK ap#.##ockcypher.com

Miscellaneous

Searches for the following windows

ClassName: '3a0a7699def9' WindowName: '3d0d719ed9fe0'

Creates and executes the following

'<SYSTEM32>\cmd.exe' /c ping 127.0.0.1 & del /F /Q "<Full path to file>"' (with hidden window)
'<SYSTEM32>\rundll32.exe' "%PROGRAMDATA%\10205cb3f4d3\13235fb0f7d0.dat",DllGetClassObject dfsr 111111111111' (with hidden window)
'%WINDIR%\syswow64\rundll32.exe' "%PROGRAMDATA%\10205cb3f4d3\13235fb0f7d0.dat",DllGetClassObject dfsr' (with hidden window)

Executes the following

'<SYSTEM32>\rundll32.exe' "%TEMP%\B584.tmp",DllGetClassObject dfsr 000000000000
'<SYSTEM32>\cmd.exe' /c ping 127.0.0.1 & del /F /Q "<Full path to file>"
'<SYSTEM32>\taskeng.exe' {A396211E-34AF-4960-BE08-E7E4EE336946} S-1-5-21-1960123792-2022915161-3775307078-1001:zpjdvfpi\user:Interactive:[1]
'<SYSTEM32>\ping.exe' 127.0.0.1
'<SYSTEM32>\rundll32.exe' "%PROGRAMDATA%\10205cb3f4d3\13235fb0f7d0.dat",DllGetClassObject dfsr 111111111111
'%WINDIR%\syswow64\rundll32.exe' "%PROGRAMDATA%\10205cb3f4d3\13235fb0f7d0.dat",DllGetClassObject dfsr

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