Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'yionee' = '%HOMEPATH%\yionee.exe /k'
Creates the following files on removable media
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\yionee.exe
- <Drive name for removable media>:\archer.exe
- <Drive name for removable media>:\rcx1.tmp
- <Drive name for removable media>:\rcx2.tmp
- <Drive name for removable media>:\delete.exe
- <Drive name for removable media>:\rcx3.tmp
- <Drive name for removable media>:\rcx4.tmp
- <Drive name for removable media>:\join.exe
- <Drive name for removable media>:\rcx5.tmp
- <Drive name for removable media>:\rcx6.tmp
- <Drive name for removable media>:\toolbar.exe
Malicious functions
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
Modifies file system
Creates the following files
- %HOMEPATH%\yionee.exe
Sets the 'hidden' attribute to the following files
- %HOMEPATH%\yionee.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files
- <Drive name for removable media>:\archer.exe
- <Drive name for removable media>:\delete.exe
- <Drive name for removable media>:\join.exe
Moves the following files
- from <Drive name for removable media>:\rcx3.tmp to <Current directory>\
Substitutes the following files
- <Drive name for removable media>:\archer.exe
- <Drive name for removable media>:\delete.exe
- <Drive name for removable media>:\join.exe
Network activity
Connects to
- '255.255.255.255':8003
UDP
- DNS ASK ns#.##ayer1352.com
- DNS ASK ns#.##ayer1352.net
- DNS ASK ns#.##ayer1352.org
Miscellaneous
Creates and executes the following
- '%HOMEPATH%\yionee.exe'
