Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /y'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /O'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /k'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /D'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /A'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /l'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /w'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /n'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /r'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /J'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /C'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /i'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /x'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /b'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /t'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /S'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /h'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yajab' = '%HOMEPATH%\yajab.exe /Q'
Creates the following files on removable media:
- <Drive name for removable media>:\Passwords.exe
- <Drive name for removable media>:\RCX3.tmp
- <Drive name for removable media>:\RCX2.tmp
- <Drive name for removable media>:\RCX6.tmp
- <Drive name for removable media>:\RCX5.tmp
- <Drive name for removable media>:\RCX4.tmp
- <Drive name for removable media>:\Secret.exe
- <Drive name for removable media>:\yajab.exe
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\Porn.exe
- <Drive name for removable media>:\RCX1.tmp
- <Drive name for removable media>:\Sexy.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%\yajab.exe
Modifies file system :
Creates the following files:
- %HOMEPATH%\yajab.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\yajab.exe
- <Drive name for removable media>:\autorun.inf
- %HOMEPATH%\yajab.exe
Deletes the following files:
- <Drive name for removable media>:\Passwords.exe
- <Drive name for removable media>:\Porn.exe
- <Drive name for removable media>:\Sexy.exe
Network activity:
Connects to:
- 'ns#.##ayer1352.com':8003
UDP:
- DNS ASK ns#.##ayer1352.com
- '<Private IP address>':1036
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
