Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Iamikxnmxyobmmr' = '%APPDATA%\oHSh8K\WerFault.exe'
Creates or modifies the following files
- %APPDATA%\Microsoft\windows\Start Menu\programs\startup\iamikxnmxyobmmr.lnk
- <SYSTEM32>\tasks\jejrbzoquxmaiw
Malicious functions
Executes the following
- '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name="Core Networking - Multicast Listener Done (ICMPv4-In)" program="%WINDIR%\Explorer.EXE" dir=in action=allow protocol=TCP localport=any
Injects code into
the following system processes:
- %WINDIR%\explorer.exe
Terminates or attempts to terminate
the following system processes:
- <SYSTEM32>\werfault.exe
- <SYSTEM32>\dccw.exe
the following user processes:
- firefox.exe
- iexplore.exe
Modifies file system
Creates the following files
- %TEMP%\dy4ea38.tmp
- %TEMP%\tosiu.cmd
- %APPDATA%\ohsh8k\werfault.exe
- %TEMP%\r16d6.tmp
- %TEMP%\rs4qver.cmd
- <SYSTEM32>\m9u7\dccw.exe
Deletes the following files
- %TEMP%\tosiu.cmd
- %TEMP%\rs4qver.cmd
Moves the following files
- from %TEMP%\dy4ea38.tmp to %APPDATA%\ohsh8k\wer.dll
- from %TEMP%\r16d6.tmp to <SYSTEM32>\m9u7\dxva2.dll
Substitutes the following files
- %APPDATA%\Microsoft\Crypto\RSA\S-1-5-21-1960123792-2022915161-3775307078-1001\f58155b4b1d5a524ca0261c3ee99fb50_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
Miscellaneous
Creates and executes the following
- '<SYSTEM32>\netsh.exe' advfirewall firewall add rule name="Core Networking - Multicast Listener Done (ICMPv4-In)" program="%WINDIR%\Explorer.EXE" dir=in action=allow protocol=TCP localport=any' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c %TEMP%\tOSiu.cmd' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c %TEMP%\rs4qveR.cmd' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Create /F /TN "Jejrbzoquxmaiw" /TR <SYSTEM32>\M9u7\dccw.exe /SC minute /MO 60 /RL highest' (with hidden window)
Executes the following
- '<SYSTEM32>\cmd.exe' /c %TEMP%\tOSiu.cmd
- '<SYSTEM32>\cmd.exe' /c %TEMP%\rs4qveR.cmd
- '<SYSTEM32>\schtasks.exe' /Create /F /TN "Jejrbzoquxmaiw" /TR <SYSTEM32>\M9u7\dccw.exe /SC minute /MO 60 /RL highest
- '<SYSTEM32>\schtasks.exe' /Query /TN "Jejrbzoquxmaiw"
