Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /U'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /L'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /i'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /T'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /g'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /O'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /V'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /d'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /m'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /k'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /n'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /F'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /x'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /W'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /p'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /s'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'yeoril' = '%HOMEPATH%\yeoril.exe /Z'
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>:\lyN.ico
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\yeoril.exe
- <Drive name for removable media>:\New Folder.lnk
- <Drive name for removable media>:\yeorilx.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%\zbnat.exe
- %HOMEPATH%\yeoril.exe
- %HOMEPATH%\wzZXrL4H4rmN4qClPT.exe
- %HOMEPATH%\xrumx.exe
Executes the following:
- <SYSTEM32>\tasklist.exe
Modifies file system :
Creates the following files:
- %HOMEPATH%\zbnat.exe
- %HOMEPATH%\yeoril.exe
- %HOMEPATH%\wzZXrL4H4rmN4qClPT.exe
- %HOMEPATH%\xrumx.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\yeoril.exe
- <Drive name for removable media>:\yeorilx.exe
- <Drive name for removable media>:\lyN.ico
- %HOMEPATH%\yeoril.exe
- <Drive name for removable media>:\autorun.inf
Deletes the following files:
- %HOMEPATH%\wzZXrL4H4rmN4qClPT.exe
Network activity:
Connects to:
- 'ap#.#ostip.info':80
- '74.##5.232.51':80
TCP:
HTTP GET requests:
- ap#.#ostip.info/country.php
- 74.##5.232.51/
UDP:
- DNS ASK ap#.#ostip.info
- DNS ASK google.com
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
- ClassName: 'MS_WebcheckMonitor' WindowName: ''
- ClassName: 'MS_AutodialMonitor' WindowName: ''
