Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Olmhai' = '"%APPDATA%\Lkhculx\Olmhai.exe"'
Malicious functions
Creates and executes the following
- '' (downloaded from the Internet)
Creates and executes the following (exploit)
- 'C:\users\public\vbc.exe'
Injects code into
the following system processes:
- %WINDIR%\microsoft.net\framework\v4.0.30319\msbuild.exe
Searches for registry branches where third party applications store passwords
- [<HKCU>\Software\LinasFTP\Site Manager]
- [<HKCU>\Software\FlashPeak\BlazeFtp\Settings]
- [<HKCU>\Software\Ghisler\Total Commander]
- [<HKCU>\Software\Far\Plugins\FTP\Hosts]
- [<HKCU>\Software\Far2\Plugins\FTP\Hosts]
- [<HKCU>\Software\VanDyke\SecureFX]
- [<HKLM>\Software\Wow6432Node\NCH Software\Fling\Accounts]
- [<HKCU>\Software\NCH Software\Fling\Accounts]
- [<HKLM>\Software\Wow6432Node\NCH Software\ClassicFTP\FTPAccounts]
- [<HKCU>\Software\NCH Software\ClassicFTP\FTPAccounts]
- [<HKCU>\Software\SimonTatham\PuTTY\Sessions]
- [<HKLM>\Software\Wow6432Node\SimonTatham\PuTTY\Sessions]
- [<HKCU>\Software\Martin Prikryl]
- [<HKLM>\Software\Wow6432Node\Martin Prikryl]
- [<HKCU>\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook]
Reads files which store third party applications passwords
- %APPDATA%\mozilla\firefox\profiles.ini
- %LOCALAPPDATA%\google\chrome\user data\default\login data
- %APPDATA%\opera software\opera stable\login data
- %APPDATA%\thunderbird\profiles.ini
Modifies file system
Creates the following files
- C:\users\public\vbc.exe
- %APPDATA%\lkhculx\olmhai.exe
- %ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\policy.vpol
- %ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\3ccd5499-87a8-4b10-a215-608888dd3b55.vsch
- %ALLUSERSPROFILE%\microsoft\vault\ac658cb4-9126-49bd-b877-31eedab3f204\2f1a6504-0641-44cf-8bb5-3612d865f2e5.vsch
- %LOCALAPPDATA%\microsoft\vault\4bf4c442-9b8a-41a0-b380-dd4a704ddb28\policy.vpol
- %APPDATA%\e6f983\35a09b.lck
Deletes the following files
- %APPDATA%\e6f983\35a09b.lck
Moves the following system files
- from %WINDIR%\microsoft.net\framework\v4.0.30319\msbuild.exe to %APPDATA%\e6f983\35a09b.exe
Modifies the following files
- %APPDATA%\microsoft\crypto\rsa\s-1-5-21-1960123792-2022915161-3775307078-1001\f58155b4b1d5a524ca0261c3ee99fb50_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
Substitutes the following files
- %APPDATA%\Microsoft\Crypto\RSA\S-1-5-21-1960123792-2022915161-3775307078-1001\f58155b4b1d5a524ca0261c3ee99fb50_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
Network activity
Connects to
- '19#.#10.219.44':80
- 'po##nsac.fr':80
- 'cl###rite.ga':80
TCP
HTTP GET requests
- http://19#.#10.219.44/22/vbc.exe
- http://www.po##nsac.fr/modules/mod_footer/tmpl/Fifsawamp_Isfshxbh.bmp
UDP
- DNS ASK po##nsac.fr
- DNS ASK cl###rite.ga
Miscellaneous
Creates and executes the following
- '%WINDIR%\syswow64\cmd.exe' /c timeout 31' (with hidden window)
Executes the following
- '%CommonProgramFiles%\microsoft shared\equation\eqnedt32.exe' -Embedding
- '%WINDIR%\syswow64\cmd.exe' /c timeout 31
- '%WINDIR%\syswow64\timeout.exe' 31
- '%WINDIR%\microsoft.net\framework\v4.0.30319\msbuild.exe'
