Trojan.Siggen17.36110

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'Idle' = '"%HOMEPATH%\Idle.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'csrss' = '"C:\Users\Default\Recent\csrss.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'firefox' = '"C:\Recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\firefox.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'csrss' = '"%ProgramFiles%\Cavmr\csrss.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'spoolsv' = '"%ProgramFiles%\FCH32\spoolsv.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'System' = '"C:\totalcmd\LANGUAGE\System.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'taskhost' = '"<SYSTEM32>\sk-SK\taskhost.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'firefox' = '"%ALLUSERSPROFILE%\Desktop\firefox.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'lsass' = '"%ProgramFiles(x86)%\Reference Assemblies\Microsoft\Framework\v3.0\SubsetList\lsass.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'iexplore' = '"%ALLUSERSPROFILE%\Microsoft\DbgClr\7.1\1033\iexplore.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'dwm' = '"%ProgramFiles%\StreetsOlkShim\dwm.exe"'
[<HKLM>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, "%HOMEPATH%\Idle.exe", "%WINDIR%\RemotePackages\RemoteApps\mdm.exe", "C:\Users\Default\PrintHood\Idle.exe...
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'Idle' = '"C:\Users\Default\PrintHood\Idle.exe"'
[<HKLM>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, "%HOMEPATH%\Idle.exe", "%WINDIR%\RemotePackages\RemoteApps\mdm.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'mdm' = '"%WINDIR%\RemotePackages\RemoteApps\mdm.exe"'
[<HKLM>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'Shell' = 'explorer.exe, "%HOMEPATH%\Idle.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'services' = '"C:\Users\Default\Application Data\services.exe"'
[<HKLM>\Software\Microsoft\Windows\CurrentVersion\Run] 'System' = '"%ProgramFiles%\NavLu32\System.exe"'

Creates or modifies the following files

<SYSTEM32>\tasks\idle
<SYSTEM32>\tasks\csrssc
<SYSTEM32>\tasks\spoolsvs
<SYSTEM32>\tasks\spoolsv
<SYSTEM32>\tasks\systems
<SYSTEM32>\tasks\csrss
<SYSTEM32>\tasks\system
<SYSTEM32>\tasks\taskhostt
<SYSTEM32>\tasks\firefoxf
<SYSTEM32>\tasks\taskhost
<SYSTEM32>\tasks\firefox
<SYSTEM32>\tasks\lsassl
<SYSTEM32>\tasks\lsass
<SYSTEM32>\tasks\iexplorei
<SYSTEM32>\tasks\dwmd
<SYSTEM32>\tasks\iexplore
<SYSTEM32>\tasks\dwm
<SYSTEM32>\tasks\mdmm
<SYSTEM32>\tasks\mdm
<SYSTEM32>\tasks\idlei
<SYSTEM32>\tasks\servicess
<SYSTEM32>\tasks\services

Malicious functions

Searches for windows to

detect analytical utilities:

ClassName: 'OLLYDBG', WindowName: ''

Modifies file system

Creates the following files

%ALLUSERSPROFILE%\checker.exe
C:\users\default\application data\c5b4cb5e9653cc
%ProgramFiles%\navlu32\system.exe
%ProgramFiles%\navlu32\27d1bcfc3c54e0
%ALLUSERSPROFILE%\rcx5428.tmp
%HOMEPATH%\rcx566a.tmp
%WINDIR%\remotepackages\remoteapps\rcx5958.tmp
C:\users\default\printhood\rcx5bf7.tmp
%ProgramFiles%\streetsolkshim\rcx5ea7.tmp
%ALLUSERSPROFILE%\microsoft\dbgclr\7.1\1033\rcx6147.tmp
%ProgramFiles(x86)%\reference assemblies\microsoft\framework\v3.0\subsetlist\6203df4a6bafc7
%ProgramFiles(x86)%\reference assemblies\microsoft\framework\v3.0\subsetlist\rcx63f6.tmp
<SYSTEM32>\sk-sk\rcx6964.tmp
C:\totalcmd\language\rcx6c23.tmp
%ProgramFiles%\fch32\rcx6ec3.tmp
%ProgramFiles%\cavmr\rcx7173.tmp
C:\recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\rcx7422.tmp
C:\users\default\recent\rcx76c2.tmp
C:\users\default\application data\rcx7981.tmp
%ProgramFiles%\navlu32\rcx7c40.tmp
%TEMP%\mozn3bwhdb
C:\users\default\recent\886983d96e3d3e
C:\users\default\application data\services.exe
C:\users\default\recent\csrss.exe
C:\recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\0fc223bdacedc3
C:\recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\firefox.exe
%HOMEPATH%\6ccacd8608530f
%WINDIR%\remotepackages\remoteapps\mdm.exe
%WINDIR%\remotepackages\remoteapps\559fba5f8e4410
C:\users\default\printhood\idle.exe
C:\users\default\printhood\6ccacd8608530f
%ProgramFiles%\streetsolkshim\dwm.exe
%ProgramFiles%\streetsolkshim\6cb0b6c459d5d3
%ALLUSERSPROFILE%\microsoft\dbgclr\7.1\1033\iexplore.exe
%ALLUSERSPROFILE%\microsoft\dbgclr\7.1\1033\9db6e019d4f04e
%TEMP%\6xlp4jq8yw.bat
%ALLUSERSPROFILE%\desktop\rcx66a5.tmp
%ProgramFiles(x86)%\reference assemblies\microsoft\framework\v3.0\subsetlist\lsass.exe
%ALLUSERSPROFILE%\desktop\0fc223bdacedc3
<SYSTEM32>\sk-sk\taskhost.exe
<SYSTEM32>\sk-sk\b75386f1303e64
C:\totalcmd\language\system.exe
C:\totalcmd\language\27d1bcfc3c54e0
%ProgramFiles%\fch32\spoolsv.exe
%ProgramFiles%\fch32\f3b6ecef712a24
%ProgramFiles%\cavmr\csrss.exe
%ProgramFiles%\cavmr\886983d96e3d3e
%HOMEPATH%\idle.exe
%ALLUSERSPROFILE%\desktop\firefox.exe
nul

Sets the 'hidden' attribute to the following files

%ALLUSERSPROFILE%\checker.exe
%HOMEPATH%\idle.exe
%WINDIR%\remotepackages\remoteapps\mdm.exe
C:\users\default\printhood\idle.exe
%ProgramFiles%\streetsolkshim\dwm.exe
%ALLUSERSPROFILE%\microsoft\dbgclr\7.1\1033\iexplore.exe
%ProgramFiles(x86)%\reference assemblies\microsoft\framework\v3.0\subsetlist\lsass.exe
%ALLUSERSPROFILE%\desktop\firefox.exe
<SYSTEM32>\sk-sk\taskhost.exe
C:\totalcmd\language\system.exe
%ProgramFiles%\fch32\spoolsv.exe
%ProgramFiles%\cavmr\csrss.exe
C:\recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\firefox.exe
C:\users\default\recent\csrss.exe
C:\users\default\application data\services.exe
%ProgramFiles%\navlu32\system.exe

Deletes the following files

%TEMP%\mozn3bwhdb

Moves the following files

from %ALLUSERSPROFILE%\rcx5428.tmp to %ALLUSERSPROFILE%\checker.exe
from %HOMEPATH%\rcx566a.tmp to %HOMEPATH%\idle.exe
from %WINDIR%\remotepackages\remoteapps\rcx5958.tmp to %WINDIR%\remotepackages\remoteapps\mdm.exe
from C:\users\default\printhood\rcx5bf7.tmp to C:\users\default\printhood\idle.exe
from %ProgramFiles%\streetsolkshim\rcx5ea7.tmp to %ProgramFiles%\streetsolkshim\dwm.exe
from %ALLUSERSPROFILE%\microsoft\dbgclr\7.1\1033\rcx6147.tmp to %ALLUSERSPROFILE%\microsoft\dbgclr\7.1\1033\iexplore.exe
from %ProgramFiles(x86)%\reference assemblies\microsoft\framework\v3.0\subsetlist\rcx63f6.tmp to %ProgramFiles(x86)%\reference assemblies\microsoft\framework\v3.0\subsetlist\lsass.exe
from %ALLUSERSPROFILE%\desktop\rcx66a5.tmp to %ALLUSERSPROFILE%\desktop\firefox.exe
from <SYSTEM32>\sk-sk\rcx6964.tmp to <SYSTEM32>\sk-sk\taskhost.exe
from C:\totalcmd\language\rcx6c23.tmp to C:\totalcmd\language\system.exe
from %ProgramFiles%\fch32\rcx6ec3.tmp to %ProgramFiles%\fch32\spoolsv.exe
from %ProgramFiles%\cavmr\rcx7173.tmp to %ProgramFiles%\cavmr\csrss.exe
from C:\recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\rcx7422.tmp to C:\recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\firefox.exe
from C:\users\default\recent\rcx76c2.tmp to C:\users\default\recent\csrss.exe
from C:\users\default\application data\rcx7981.tmp to C:\users\default\application data\services.exe
from %ProgramFiles%\navlu32\rcx7c40.tmp to %ProgramFiles%\navlu32\system.exe

Network activity

Connects to

'cd#.##scordapp.com':443
'us####gf.beget.tech':80
'ap#.##legram.org':443
'ip##fo.io':443

TCP

HTTP GET requests

http://us####gf.beget.tech/_dblocal.php?Wb#######################################################################################################################################################...
http://us####gf.beget.tech/_dblocal.php?qH#######################################################################################################################################################...

Other

'cd#.##scordapp.com':443
'ap#.##legram.org':443
'ip##fo.io':443

UDP

DNS ASK cd#.##scordapp.com
DNS ASK us####gf.beget.tech
DNS ASK ap#.##legram.org
DNS ASK ip##fo.io
'localhost':123

Miscellaneous

Creates and executes the following

'%ALLUSERSPROFILE%\checker.exe'
'%ProgramFiles%\cavmr\csrss.exe'
'<SYSTEM32>\cmd.exe' /C "%TEMP%\6xLp4JQ8yw.bat"' (with hidden window)

Executes the following

'<SYSTEM32>\schtasks.exe' /create /tn "Idle" /sc MINUTE /mo 6 /tr "'%HOMEPATH%\Idle.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "System" /sc ONSTART /tr "'C:\totalcmd\LANGUAGE\System.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "SystemS" /sc MINUTE /mo 14 /tr "'C:\totalcmd\LANGUAGE\System.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "spoolsv" /sc MINUTE /mo 13 /tr "'%ProgramFiles%\FCH32\spoolsv.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "spoolsv" /sc ONLOGON /tr "'%ProgramFiles%\FCH32\spoolsv.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "spoolsv" /sc ONSTART /tr "'%ProgramFiles%\FCH32\spoolsv.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "spoolsvs" /sc MINUTE /mo 14 /tr "'%ProgramFiles%\FCH32\spoolsv.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "csrss" /sc MINUTE /mo 5 /tr "'%ProgramFiles%\Cavmr\csrss.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "csrss" /sc ONLOGON /tr "'%ProgramFiles%\Cavmr\csrss.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "csrss" /sc ONSTART /tr "'%ProgramFiles%\Cavmr\csrss.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "csrssc" /sc MINUTE /mo 10 /tr "'%ProgramFiles%\Cavmr\csrss.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "firefox" /sc MINUTE /mo 14 /tr "'C:\Recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\firefox.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "firefox" /sc ONLOGON /tr "'C:\Recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\firefox.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "dwmd" /sc MINUTE /mo 9 /tr "'%ProgramFiles%\StreetsOlkShim\dwm.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "firefox" /sc ONSTART /tr "'C:\Recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\firefox.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "csrss" /sc MINUTE /mo 13 /tr "'C:\Users\Default\Recent\csrss.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "csrss" /sc ONLOGON /tr "'C:\Users\Default\Recent\csrss.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "csrss" /sc ONSTART /tr "'C:\Users\Default\Recent\csrss.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "csrssc" /sc MINUTE /mo 9 /tr "'C:\Users\Default\Recent\csrss.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "services" /sc MINUTE /mo 14 /tr "'C:\Users\Default\Application Data\services.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "services" /sc ONLOGON /tr "'C:\Users\Default\Application Data\services.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "services" /sc ONSTART /tr "'C:\Users\Default\Application Data\services.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "servicess" /sc MINUTE /mo 8 /tr "'C:\Users\Default\Application Data\services.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "System" /sc MINUTE /mo 8 /tr "'%ProgramFiles%\NavLu32\System.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "System" /sc ONLOGON /tr "'%ProgramFiles%\NavLu32\System.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "System" /sc ONSTART /tr "'%ProgramFiles%\NavLu32\System.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "SystemS" /sc MINUTE /mo 5 /tr "'%ProgramFiles%\NavLu32\System.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "System" /sc MINUTE /mo 10 /tr "'C:\totalcmd\LANGUAGE\System.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "System" /sc ONLOGON /tr "'C:\totalcmd\LANGUAGE\System.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "taskhostt" /sc MINUTE /mo 5 /tr "'<SYSTEM32>\sk-SK\taskhost.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "taskhost" /sc ONSTART /tr "'<SYSTEM32>\sk-SK\taskhost.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "taskhost" /sc ONLOGON /tr "'<SYSTEM32>\sk-SK\taskhost.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "Idle" /sc ONSTART /tr "'%HOMEPATH%\Idle.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "IdleI" /sc MINUTE /mo 5 /tr "'%HOMEPATH%\Idle.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "mdm" /sc MINUTE /mo 13 /tr "'%WINDIR%\RemotePackages\RemoteApps\mdm.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "mdm" /sc ONLOGON /tr "'%WINDIR%\RemotePackages\RemoteApps\mdm.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "mdm" /sc ONSTART /tr "'%WINDIR%\RemotePackages\RemoteApps\mdm.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "mdmm" /sc MINUTE /mo 14 /tr "'%WINDIR%\RemotePackages\RemoteApps\mdm.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "Idle" /sc MINUTE /mo 5 /tr "'C:\Users\Default\PrintHood\Idle.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "Idle" /sc ONLOGON /tr "'C:\Users\Default\PrintHood\Idle.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "Idle" /sc ONSTART /tr "'C:\Users\Default\PrintHood\Idle.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "IdleI" /sc MINUTE /mo 14 /tr "'C:\Users\Default\PrintHood\Idle.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "dwm" /sc MINUTE /mo 6 /tr "'%ProgramFiles%\StreetsOlkShim\dwm.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "dwm" /sc ONLOGON /tr "'%ProgramFiles%\StreetsOlkShim\dwm.exe'" /rl HIGHEST /f
'<SYSTEM32>\cmd.exe' /C "%TEMP%\6xLp4JQ8yw.bat"
'<SYSTEM32>\schtasks.exe' /create /tn "firefoxf" /sc MINUTE /mo 11 /tr "'C:\Recovery\1195d5a8-f371-11e4-9c00-dd3082671db2\firefox.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "dwm" /sc ONSTART /tr "'%ProgramFiles%\StreetsOlkShim\dwm.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "iexplore" /sc ONLOGON /tr "'%ALLUSERSPROFILE%\Microsoft\DbgClr\7.1\1033\iexplore.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "iexplore" /sc ONSTART /tr "'%ALLUSERSPROFILE%\Microsoft\DbgClr\7.1\1033\iexplore.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "iexplorei" /sc MINUTE /mo 6 /tr "'%ALLUSERSPROFILE%\Microsoft\DbgClr\7.1\1033\iexplore.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsass" /sc MINUTE /mo 10 /tr "'%ProgramFiles(x86)%\Reference Assemblies\Microsoft\Framework\v3.0\SubsetList\lsass.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsass" /sc ONLOGON /tr "'%ProgramFiles(x86)%\Reference Assemblies\Microsoft\Framework\v3.0\SubsetList\lsass.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsass" /sc ONSTART /tr "'%ProgramFiles(x86)%\Reference Assemblies\Microsoft\Framework\v3.0\SubsetList\lsass.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "lsassl" /sc MINUTE /mo 5 /tr "'%ProgramFiles(x86)%\Reference Assemblies\Microsoft\Framework\v3.0\SubsetList\lsass.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "firefox" /sc MINUTE /mo 12 /tr "'%ALLUSERSPROFILE%\Desktop\firefox.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "firefox" /sc ONLOGON /tr "'%ALLUSERSPROFILE%\Desktop\firefox.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "firefox" /sc ONSTART /tr "'%ALLUSERSPROFILE%\Desktop\firefox.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "firefoxf" /sc MINUTE /mo 6 /tr "'%ALLUSERSPROFILE%\Desktop\firefox.exe'" /f
'<SYSTEM32>\schtasks.exe' /create /tn "taskhost" /sc MINUTE /mo 12 /tr "'<SYSTEM32>\sk-SK\taskhost.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "Idle" /sc ONLOGON /tr "'%HOMEPATH%\Idle.exe'" /rl HIGHEST /f
'<SYSTEM32>\schtasks.exe' /create /tn "iexplore" /sc MINUTE /mo 12 /tr "'%ALLUSERSPROFILE%\Microsoft\DbgClr\7.1\1033\iexplore.exe'" /rl HIGHEST /f
'<SYSTEM32>\w32tm.exe' /stripchart /computer:localhost /period:5 /dataonly /samples:2

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