Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /p'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /D'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /e'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /x'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /L'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /C'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /V'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /B'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /K'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'cytul' = '%HOMEPATH%\cytul.exe /R'
Creates the following files on removable media:
- <Drive name for removable media>:\Pictures.lnk
- <Drive name for removable media>:\Documents.lnk
- <Drive name for removable media>:\Video.lnk
- <Drive name for removable media>:\Music.lnk
- <Drive name for removable media>:\Passwords.lnk
- <Drive name for removable media>:\cytul.exe
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\cytulx.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%\bxcess.exe
- %HOMEPATH%\cytul.exe
- %HOMEPATH%\axcess.exe
Executes the following:
- <SYSTEM32>\tasklist.exe
Modifies file system :
Creates the following files:
- %HOMEPATH%\cxcess.exe
- %HOMEPATH%\cytul.exe
- %HOMEPATH%\axcess.exe
- %HOMEPATH%\bxcess.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\cytul.exe
- <Drive name for removable media>:\cytulx.exe
- %HOMEPATH%\cytul.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files:
- %HOMEPATH%\axcess.exe
Network activity:
Connects to:
- 'me####taonline.net':80
TCP:
HTTP POST requests:
- me####taonline.net/muchahos.php?in##############################################################################################################
UDP:
- DNS ASK me####taonline.net
- DNS ASK ya##o.co.jp
- DNS ASK qq.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
