Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /C'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /h'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /o'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /T'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /e'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /R'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /m'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /Q'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /i'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /F'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /Y'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /p'
- [<HKLM>\SYSTEM\ControlSet001\Control\Print\Providers\3501063088] 'Name' = '"%TEMP%\3.tmp"'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /b'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /A'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /K'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /s'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /J'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'viyen' = '%HOMEPATH%\viyen.exe /l'
Creates the following files on removable media:
- <Drive name for removable media>:\Documents.lnk
- <Drive name for removable media>:\Passwords.lnk
- <Drive name for removable media>:\Pictures.lnk
- <Drive name for removable media>:\Video.lnk
- <Drive name for removable media>:\Music.lnk
- <Drive name for removable media>:\cYu.ico
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\viyen.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\viyenx.exe
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Creates and executes the following:
- %HOMEPATH%\svc32.exe
- %HOMEPATH%\viyen.exe
- %HOMEPATH%\ppp.exe
- %HOMEPATH%\ppK1Ml6Ir8.exe
- %HOMEPATH%\pp.exe
Executes the following:
- <SYSTEM32>\tasklist.exe
Injects code into
the following system processes:
- <SYSTEM32>\spoolsv.exe
Modifies settings of Windows Internet Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1400' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1601' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] 'currentlevel' = '00000000'
Modifies file system :
Creates the following files:
- %WINDIR%\Temp\4.tmp
- %TEMP%\2.tmp
- %TEMP%\Rlb..bat
- %HOMEPATH%\viyen.exe
- %HOMEPATH%\ppK1Ml6Ir8.exe
- %HOMEPATH%\pp.exe
- %HOMEPATH%\svc32.exe
- %HOMEPATH%\ppp.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\viyen.exe
- <Drive name for removable media>:\viyenx.exe
- <Drive name for removable media>:\cYu.ico
- %HOMEPATH%\viyen.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files:
- %HOMEPATH%\ppK1Ml6Ir8.exe
- %HOMEPATH%\ppp.exe
- %WINDIR%\Temp\4.tmp
- %TEMP%\3.tmp
- <DRIVERS>\etc\hosts
Network activity:
Connects to:
- 'di####lpackpack.in':80
- 'ap#.#ostip.info':80
TCP:
HTTP GET requests:
- ap#.#ostip.info/country.php
HTTP POST requests:
- di####lpackpack.in/wekdmxx.php?in##############################################################################################################
UDP:
- DNS ASK ho###ay.com.cn
- DNS ASK di####lpackpack.in
- DNS ASK ap#.#ostip.info
- DNS ASK vn###ress.net
- DNS ASK ne##og.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
- ClassName: 'MS_WebcheckMonitor' WindowName: ''
- ClassName: 'MS_AutodialMonitor' WindowName: ''
