Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Urlml' = '%APPDATA%\nzcU5S\SystemPropertiesPerformance.exe'
Creates or modifies the following files
- %APPDATA%\Microsoft\windows\Start Menu\programs\startup\urlml.lnk
- <SYSTEM32>\tasks\byyiaymqxdbehoi
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>\systempropertiesperformance.exe
- <SYSTEM32>\sigverif.exe
the following user processes:
- firefox.exe
- iexplore.exe
Modifies file system
Creates the following files
- %TEMP%\u5a48.tmp
- %TEMP%\yf2j8qx.cmd
- %APPDATA%\nzcu5s\systempropertiesperformance.exe
- %TEMP%\tz8532.tmp
- %TEMP%\9g4khq.cmd
- <SYSTEM32>\gy0wmm\sigverif.exe
Deletes the following files
- %TEMP%\yf2j8qx.cmd
- %TEMP%\9g4khq.cmd
Moves the following files
- from %TEMP%\u5a48.tmp to %APPDATA%\nzcu5s\sysdm.cpl
- from %TEMP%\tz8532.tmp to <SYSTEM32>\gy0wmm\version.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%\yf2j8qx.cmd' (with hidden window)
- '<SYSTEM32>\cmd.exe' /c %TEMP%\9g4kHq.cmd' (with hidden window)
- '<SYSTEM32>\schtasks.exe' /Create /F /TN "Byyiaymqxdbehoi" /TR <SYSTEM32>\Gy0wmm\sigverif.exe /SC minute /MO 60 /RL highest' (with hidden window)
Executes the following
- '<SYSTEM32>\cmd.exe' /c %TEMP%\yf2j8qx.cmd
- '<SYSTEM32>\cmd.exe' /c %TEMP%\9g4kHq.cmd
- '<SYSTEM32>\schtasks.exe' /Create /F /TN "Byyiaymqxdbehoi" /TR <SYSTEM32>\Gy0wmm\sigverif.exe /SC minute /MO 60 /RL highest
- '<SYSTEM32>\schtasks.exe' /Query /TN "Byyiaymqxdbehoi"
