Technical Information
Malicious functions
To complicate detection of its presence in the operating system,
deletes volume shadow copies.
Executes the following
- '%WINDIR%\syswow64\net.exe' stop "audioendpointbuilder" /y
- '%WINDIR%\syswow64\net.exe' stop "samss" /y
Modifies file system
Creates the following files
- <Current directory>\wzulzpnoblan.exe
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\appl...
- C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acrordrdcupd1500820082.msp
- C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab
- C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\ryukreadme.html
- C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi
- C:\documents and settings\all users\adobe\arm\reader_15.007.20033\acrordrdcupd1500920077.msp
- C:\documents and settings\all users\adobe\arm\s\armmanifest.msi
- C:\documents and settings\all users\adobe\setup\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\{291aa914-a987-4ce9-bd63-ac0a92d435e5}\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\s\10428\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi
- C:\documents and settings\all users\adobe\arm\s\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\reader_15.008.20082\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\reader_15.007.20033\ryukreadme.html
- C:\documents and settings\all users\adobe\arm\ryukreadme.html
- C:\documents and settings\all users\adobe\ryukreadme.html
- C:\documents and settings\all users\ryukreadme.html
- C:\documents and settings\ryukreadme.html
- C:\$recycle.bin\s-1-5-21-1960123792-2022915161-3775307078-1001\ryukreadme.html
- C:\$recycle.bin\ryukreadme.html
- C:\ryukreadme.html
- D:\$recycle.bin\s-1-5-21-1960123792-2022915161-3775307078-1001\ryukreadme.html
- D:\$recycle.bin\ryukreadme.html
- D:\ryukreadme.html
- %TEMP%\ryukreadme.html
- %ALLUSERSPROFILE%\microsoft\crypto\rsa\machinekeys\08e575673cce10c72090304839888e02_36d1130a-ac2e-44f7-9dc1-e424fbcbe0ee
- <Current directory>\hgqtibtpqlan.exe
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\micr...
- C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\docu...
Sets the 'hidden' attribute to the following files
- <Current directory>\wzulzpnoblan.exe
- <Current directory>\hgqtibtpqlan.exe
Moves the following files
- from C:\documents and settings\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi to C:\documents and settings\all users\adobe\arm\reader_15.007.20033\readerdcmanifest.msi.ryk
- from C:\documents and settings\all users\adobe\arm\s\armmanifest.msi to C:\documents and settings\all users\adobe\arm\s\armmanifest.msi.ryk
- from C:\documents and settings\all users\adobe\arm\reader_15.007.20033\acrordrdcupd1500920077.msp to C:\documents and settings\all users\adobe\arm\reader_15.007.20033\acrordrdcupd1500920077.msp.ryk
- from C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi to C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acroread.msi.ryk
- from C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab to C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\data1.cab.ryk
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\appl... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\appl...
- from C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acrordrdcupd1500820082.msp to C:\documents and settings\all users\adobe\setup\{ac76ba86-7ad7-1033-7b44-ac0f074e4100}\acrordrdcupd1500820082.msp.ryk
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\micr... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\micr...
- from C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\docu... to C:\documents and settings\all users\application data\application data\application data\application data\application data\application data\application data\application data\application data\docu...
Modifies the following files
- D:\system volume information\tracking.log
Changes user data files extensions (Trojan.Encoder).
Network activity
UDP
- '<LOCALNET>.4.1':7
- '22#.0.0.22':7
- '22#.0.0.252':7
Miscellaneous
Creates and executes the following
- '<Current directory>\wzulzpnoblan.exe' 8 LAN
- '<Current directory>\hgqtibtpqlan.exe' 8 LAN
- '<Current directory>\wzulzpnoblan.exe' 8 LAN' (with hidden window)
- '<Current directory>\hgqtibtpqlan.exe' 8 LAN' (with hidden window)
- '%WINDIR%\syswow64\net.exe' stop "audioendpointbuilder" /y' (with hidden window)
- '%WINDIR%\syswow64\net.exe' stop "samss" /y' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c "WMIC.exe shadowcopy delete"' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c "vssadmin.exe Delete Shadows /all /quiet"' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c "bootstatuspolicy ignoreallfailures"' (with hidden window)
- '%WINDIR%\syswow64\icacls.exe' "C:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ' (with hidden window)
- '%WINDIR%\syswow64\icacls.exe' "E:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ' (with hidden window)
- '%WINDIR%\syswow64\cmd.exe' /c "bcdedit /set {default} recoveryenabled No & bcdedit /set {default}"' (with hidden window)
- '%WINDIR%\syswow64\icacls.exe' "A:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ' (with hidden window)
- '%WINDIR%\syswow64\icacls.exe' "D:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ' (with hidden window)
- '%WINDIR%\syswow64\icacls.exe' "<Drive name for removable media>:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ' (with hidden window)
Executes the following
- '%WINDIR%\syswow64\cmd.exe' /c "WMIC.exe shadowcopy delete"
- '%WINDIR%\syswow64\cmd.exe' /c "vssadmin.exe Delete Shadows /all /quiet"
- '%WINDIR%\syswow64\cmd.exe' /c "bootstatuspolicy ignoreallfailures"
- '%WINDIR%\syswow64\icacls.exe' "C:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ
- '%WINDIR%\syswow64\icacls.exe' "E:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ
- '%WINDIR%\syswow64\cmd.exe' /c "bcdedit /set {default} recoveryenabled No & bcdedit /set {default}"
- '%WINDIR%\syswow64\icacls.exe' "A:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ
- '%WINDIR%\syswow64\icacls.exe' "D:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ
- '%WINDIR%\syswow64\icacls.exe' "<Drive name for removable media>:\*" /grant Everyone:F /T /C /QГїГѕГѕГїГѕГїГѕГѕ
- '%WINDIR%\syswow64\net1.exe' stop "audioendpointbuilder" /y
- '%WINDIR%\syswow64\net1.exe' stop "samss" /y
