Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '*MdaMngr' = '"%ALLUSERSPROFILE%\MdaMngr\taskeng.exe"'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\mmc.exe] 'Debugger' = 'wuauclt.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\Firewall.cpl] 'Debugger' = 'wuauclt.exe'
Changes the following executable system files:
- <SYSTEM32>\mmc.exe.73PaL
- <SYSTEM32>\Firewall.cpl.1Y87
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'EnableFirewall' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\DomainProfile] 'DoNotAllowExceptions' = '00000000'
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Executes the following:
- '<SYSTEM32>\wbem\wmiadap.exe' /R /T
- '<SYSTEM32>\netsh.exe' firewall set opmode mode=disable profile=all
- '<SYSTEM32>\sc.exe' config SharedAccess start= disabled
Modifies file system :
Creates the following files:
- <SYSTEM32>\firewall.cpl:Zone.Identifier
- <SYSTEM32>\mmc.exe:Zone.Identifier
- %ALLUSERSPROFILE%\MdaMngr\vboxservice.exe
- %TEMP%\nsx2.tmp
- %TEMP%\posturer.wca
- %TEMP%\nsn3.tmp\posturer.dll
Sets the 'hidden' attribute to the following files:
- %ALLUSERSPROFILE%\MdaMngr\vboxservice.exe
Deletes the following files:
- <SYSTEM32>\cAnLPcSsKxnOar
- <SYSTEM32>\ibpQemRWjZYDEXberSxZI
- %TEMP%\nsn3.tmp\posturer.dll
Moves the following system files:
- from <SYSTEM32>\aYfiocBDCwMfKL to <SYSTEM32>\gioeBjPpXVXNHi
- from <SYSTEM32>\gioeBjPpXVXNHi to <SYSTEM32>\oqXLTovHjPOQgZJQU
- from <SYSTEM32>\oqXLTovHjPOQgZJQU to <SYSTEM32>\HTsaIegCgdvuFAuML
- from <SYSTEM32>\bfRBNqDcRjAvbt to <SYSTEM32>\aYfiocBDCwMfKL
- from <SYSTEM32>\CwkdQBSXbOQOwg to <SYSTEM32>\EWZFXsySHCJgswG
- from <SYSTEM32>\EWZFXsySHCJgswG to <SYSTEM32>\DbbkVUj{dkkJTa
- from <SYSTEM32>\DbbkVUj{dkkJTa to <SYSTEM32>\bfRBNqDcRjAvbt
- from <SYSTEM32>\HTsaIegCgdvuFAuML to <SYSTEM32>\uGxzEvNsVomhADK
- from <SYSTEM32>\qSBnMYSfHXUAUSU to <SYSTEM32>\PzsZOulNGmflXhCBC
- from <SYSTEM32>\PzsZOulNGmflXhCBC to <SYSTEM32>\SEmFMNswLIWTE
- from <SYSTEM32>\SEmFMNswLIWTE to <SYSTEM32>\cAnLPcSsKxnOar
- from <SYSTEM32>\dfmtK[oeqcFcoj to <SYSTEM32>\qSBnMYSfHXUAUSU
- from <SYSTEM32>\uGxzEvNsVomhADK to <SYSTEM32>\yD{idrqm{pgvNpKqH
- from <SYSTEM32>\yD{idrqm{pgvNpKqH to <SYSTEM32>\bEyOfsBBQEfUAQrgr
- from <SYSTEM32>\bEyOfsBBQEfUAQrgr to <SYSTEM32>\dfmtK[oeqcFcoj
- from <SYSTEM32>\GRUriFtYCfppRzJnw to <SYSTEM32>\CwkdQBSXbOQOwg
- from <SYSTEM32>\qMFndeQJzhjQOnCNC to <SYSTEM32>\FBqRjAWsZnLqnAVKYBOb
- from <SYSTEM32>\FBqRjAWsZnLqnAVKYBOb to <SYSTEM32>\xaiwRCiUQWqycsLERhk
- from <SYSTEM32>\xaiwRCiUQWqycsLERhk to <SYSTEM32>\PTisRJByVDZODPaMQ
- from <SYSTEM32>\xlFoPyElFS[AxcoIirWN to <SYSTEM32>\qMFndeQJzhjQOnCNC
- from <SYSTEM32>\firewall.cpl to <SYSTEM32>\Firewall.cpl.1Y87
- from <SYSTEM32>\Firewall.cpl.1Y87 to <SYSTEM32>\wJfPTCtPmMOryjrZtvdC
- from <SYSTEM32>\wJfPTCtPmMOryjrZtvdC to <SYSTEM32>\xlFoPyElFS[AxcoIirWN
- from <SYSTEM32>\PTisRJByVDZODPaMQ to <SYSTEM32>\WJdAxFFogJnGQikBZvQ
- from <SYSTEM32>\NecwYnszEcZaoyZvXcOJ to <SYSTEM32>\ibpQemRWjZYDEXberSxZI
- from <SYSTEM32>\mmc.exe to <SYSTEM32>\mmc.exe.73PaL
- from <SYSTEM32>\mmc.exe.73PaL to <SYSTEM32>\GRUriFtYCfppRzJnw
- from <SYSTEM32>\HHxnfaLtmPiGWVrGet to <SYSTEM32>\NecwYnszEcZaoyZvXcOJ
- from <SYSTEM32>\WJdAxFFogJnGQikBZvQ to <SYSTEM32>\lfcYlmIdwHtKVFdLhixdE
- from <SYSTEM32>\lfcYlmIdwHtKVFdLhixdE to <SYSTEM32>\owufRaphXNOPCsNposHQU
- from <SYSTEM32>\owufRaphXNOPCsNposHQU to <SYSTEM32>\HHxnfaLtmPiGWVrGet
Moves itself:
- from <Full path to virus> to %ALLUSERSPROFILE%\MdaMngr\taskeng.exe
Network activity:
Connects to:
- 'su#.##rkcrew.net':80
TCP:
HTTP POST requests:
- su#.##rkcrew.net/secure/page.php
UDP:
- DNS ASK su#.##rkcrew.net
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
