Trojan.Carberp.2554

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run] 'Win32 SystemNetwork Application' = '%ProgramData%\WindowsDefender\svchost.exe'
[<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'Win32 SystemNetwork Application' = '%ProgramData%\WindowsDefender\svchost.exe'
[<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Win32 SystemNetwork Application' = '%ProgramData%\WindowsDefender\svchost.exe'
[<HKCU>\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run] 'Win32 SystemNetwork Application' = '%ProgramData%\WindowsDefender\svchost.exe'

Creates or modifies the following files

%APPDATA%\microsoft\windows\start menu\programs\startup\realteksb.lnk
<SYSTEM32>\tasks\realtek sound blaster
<SYSTEM32>\tasks\winwow64

Malicious functions

Executes the following

'%WINDIR%\syswow64\taskkill.exe' /F /FI "IMAGENAME EQ MicrosoftStores.exe"

Searches for registry branches where third party applications store passwords

[<HKCU>\Software\Martin Prikryl\WinSCP 2\Sessions]

Reads files which store third party applications passwords

%ProgramFiles(x86)%\steam\config\config.vdf
%ProgramFiles(x86)%\steam\config\dialogconfig.vdf
%LOCALAPPDATA%\google\chrome\user data\default\cookies
%LOCALAPPDATA%\google\chrome\user data\default\login data
%LOCALAPPDATA%\google\chrome\user data\default\web data
%APPDATA%\opera software\opera stable\login data

Searches for windows to

detect analytical utilities:

ClassName: 'OLLYDBG', WindowName: ''
ClassName: 'GBDYLLO', WindowName: ''
ClassName: 'pediy06', WindowName: ''
ClassName: 'FilemonClass', WindowName: ''
ClassName: '', WindowName: 'File Monitor - Sysinternals: www.sysinternals.com'
ClassName: 'PROCMON_WINDOW_CLASS', WindowName: ''
ClassName: '', WindowName: 'Process Monitor - Sysinternals: www.sysinternals.com'
ClassName: 'RegmonClass', WindowName: ''
ClassName: '', WindowName: 'Registry Monitor - Sysinternals: www.sysinternals.com'

Modifies file system

Creates the following files

%TEMP%\nsg816f.tmp
nul
%TEMP%\microsoftstores.bat
%ALLUSERSPROFILE%\windowsdefender\svchost.exe
%ALLUSERSPROFILE%\systemnetwork\microsoftstores.exe
%LOCALAPPDATA%\microsoft\vault\4bf4c442-9b8a-41a0-b380-dd4a704ddb28\policy.vpol
%ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\2f1a6504-0641-44cf-8bb5-3612d865f2e5.vsch
%ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\3ccd5499-87a8-4b10-a215-608888dd3b55.vsch
%ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\policy.vpol
%ALLUSERSPROFILE%\q6x0v3s0p3x0v3s0p3\cewysto7
%ALLUSERSPROFILE%\systemnetwork\ncoremanager.exe
%LOCALAPPDATA%\microsoft\windows\history\low\history.ie5\index.dat
%APPDATA%\microsoft\windows\cookies\low\index.dat
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\6v56hwhx\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\f6mji6wb\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\3pxec3ms\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\kel3c0td\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\index.dat
%LOCALAPPDATA%\microsoft\windows\history\low\history.ie5\desktop.ini
%LOCALAPPDATA%\microsoft\windows\history\low\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\desktop.ini
%APPDATA%\realtek sound blaster\realteksb.exe
%APPDATA%\software\software.exe
%APPDATA%\software\mule_91.exe
%APPDATA%\software\art_50.exe
%APPDATA%\general\keen_52.exe
%TEMP%\nsg8170.tmp\system.dll
%ALLUSERSPROFILE%\windowsdefender\phoenixminer.exe
%ALLUSERSPROFILE%\systemnetwork\arch.txt

Sets the 'hidden' attribute to the following files

%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\kel3c0td\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\3pxec3ms\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\f6mji6wb\desktop.ini
%LOCALAPPDATA%\microsoft\windows\<INETFILES>\low\content.ie5\6v56hwhx\desktop.ini
%LOCALAPPDATA%\microsoft\windows\history\low\history.ie5\desktop.ini
%LOCALAPPDATA%\microsoft\windows\history\low\desktop.ini

Deletes the following files

%TEMP%\nsg8170.tmp\system.dll
%ALLUSERSPROFILE%\q6x0v3s0p3x0v3s0p3\cewysto7
%APPDATA%\software\art_50.exe

Substitutes the following files

%ALLUSERSPROFILE%\q6x0v3s0p3x0v3s0p3\cewysto7

Network activity

TCP

HTTP GET requests

http://19#.#47.115.117/zzztop1/nCoreManager.exe
http://19#.#47.115.117/zzztop1/MicrosoftStores.exe
http://19#.#47.115.117/zzztop/PhoenixMiner.exe

HTTP POST requests

http://85.##9.91.120/cfg/
http://85.##9.91.120/log/

Miscellaneous

Searches for the following windows

ClassName: '18467-41' WindowName: ''
ClassName: '' WindowName: ''

Creates and executes the following

'%APPDATA%\general\keen_52.exe'
'%APPDATA%\software\art_50.exe'
'%APPDATA%\software\mule_91.exe'
'%APPDATA%\realtek sound blaster\realteksb.exe'
'%ALLUSERSPROFILE%\systemnetwork\ncoremanager.exe'
'%ALLUSERSPROFILE%\systemnetwork\microsoftstores.exe'
'%ALLUSERSPROFILE%\windowsdefender\svchost.exe'
'%ALLUSERSPROFILE%\windowsdefender\phoenixminer.exe' -pool stratum+tcp://eu.emcd.io:7777 -pool2 stratum+tcp://eu2.emcd.io:7777 -wal patriot.hi -gpow 30 -gt 6 -log 0
'%WINDIR%\syswow64\cmd.exe' /k ping -n 5 localhost < nul & del /F /Q "%APPDATA%\Software\Art_50.exe"' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /c %TEMP%\MicrosoftStores.bat' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /c WMIC OS get osarchitecture >%ALLUSERSPROFILE%\SystemNetwork\arch.txt' (with hidden window)
'%WINDIR%\syswow64\cmd.exe' /cschtasks /create /tn "WinWoW64" /tr "%ALLUSERSPROFILE%\WindowsDefender\svchost.exe" /sc MINUTE /mo 5' (with hidden window)

Executes the following

'%WINDIR%\syswow64\rundll32.exe' "%WINDIR%\syswow64\WININET.dll",DispatchAPICall 1
'%WINDIR%\syswow64\cmd.exe' /k ping -n 5 localhost < nul & del /F /Q "%APPDATA%\Software\Art_50.exe"
'%WINDIR%\syswow64\ping.exe' -n 5 localhost
'%WINDIR%\syswow64\cmd.exe' /c %TEMP%\MicrosoftStores.bat
'%WINDIR%\syswow64\cmd.exe' /c WMIC OS get osarchitecture >%ALLUSERSPROFILE%\SystemNetwork\arch.txt
'%WINDIR%\syswow64\ping.exe' -n 2 127.0.0.1
'%WINDIR%\syswow64\wbem\wmic.exe' OS get osarchitecture
'%WINDIR%\syswow64\cmd.exe' /cschtasks /create /tn "WinWoW64" /tr "%ALLUSERSPROFILE%\WindowsDefender\svchost.exe" /sc MINUTE /mo 5
'%WINDIR%\syswow64\schtasks.exe' /create /tn "WinWoW64" /tr "%ALLUSERSPROFILE%\WindowsDefender\svchost.exe" /sc MINUTE /mo 5
'%WINDIR%\syswow64\tasklist.exe' /NH /FI "IMAGENAME EQ MicrosoftStores.exe"
'%WINDIR%\syswow64\find.exe' /I "MicrosoftStores.exe"