Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Kaedxnvj' = '%APPDATA%\Mail.Ru\Agent\Mra\html\ru\jabber\GrxrRIJ6ee\msconfig.exe'
Creates or modifies the following files
- <SYSTEM32>\tasks\yhtqa
- %APPDATA%\Microsoft\windows\Start Menu\programs\startup\uiudkxwudask.lnk
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>\wusa.exe
- <SYSTEM32>\msconfig.exe
- <SYSTEM32>\dialer.exe
the following user processes:
- firefox.exe
- iexplore.exe
Modifies file system
Creates the following files
- %LOCALAPPDATA%\eg10nvdhv\wtsapi32.dll
- %LOCALAPPDATA%\eg10nvdhv\wusa.exe
- %APPDATA%\mail.ru\agent\mra\smiles\flash\yzvu0cvj\wtsapi32.dll
- %APPDATA%\mail.ru\agent\mra\smiles\flash\yzvu0cvj\wusa.exe
- %LOCALAPPDATA%\ll9d\mfc42u.dll
- %LOCALAPPDATA%\ll9d\msconfig.exe
- %APPDATA%\mail.ru\agent\mra\html\ru\jabber\grxrrij6ee\mfc42u.dll
- %APPDATA%\mail.ru\agent\mra\html\ru\jabber\grxrrij6ee\msconfig.exe
- %LOCALAPPDATA%\vl0\tapi32.dll
- %LOCALAPPDATA%\vl0\dialer.exe
- %APPDATA%\mail.ru\agent\mra\cz2fmcczv\tapi32.dll
- %APPDATA%\mail.ru\agent\mra\cz2fmcczv\dialer.exe
Deletes the following files
- %LOCALAPPDATA%\eg10nvdhv\wtsapi32.dll
- %LOCALAPPDATA%\eg10nvdhv\wusa.exe
- %LOCALAPPDATA%\ll9d\mfc42u.dll
- %LOCALAPPDATA%\ll9d\msconfig.exe
- %LOCALAPPDATA%\vl0\dialer.exe
- %LOCALAPPDATA%\vl0\tapi32.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
- '%LOCALAPPDATA%\eg10nvdhv\wusa.exe'
- '%LOCALAPPDATA%\ll9d\msconfig.exe'
- '%LOCALAPPDATA%\vl0\dialer.exe'
- '<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)
