Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MSFEEditor' = '"<Full path to file>" e'
Creates the following files on removable media
- <Drive name for removable media>:\join.avi.corona-lock
- <Drive name for removable media>:\000814251_video_01.avi.corona-lock
- <Drive name for removable media>:\tileimage.bmp.corona-lock
- <Drive name for removable media>:\dashborder_96.bmp.corona-lock
- <Drive name for removable media>:\dashborder_144.bmp.corona-lock
- <Drive name for removable media>:\dashborder_192.bmp.corona-lock
- <Drive name for removable media>:\testcertificate.cer.corona-lock
- <Drive name for removable media>:\sdkfailsafeemulator.cer.corona-lock
- <Drive name for removable media>:\testee.cer.corona-lock
- <Drive name for removable media>:\contoso_1.cer.corona-lock
- <Drive name for removable media>:\contoso.cer.corona-lock
- <Drive name for removable media>:\february_catalogue__2015.doc.corona-lock
- <Drive name for removable media>:\uep_form_786_bulletin_1726i602.doc.corona-lock
Malicious functions
To complicate detection of its presence in the operating system,
deletes volume shadow copies.
Modifies file system
Creates the following files
- %APPDATA%\key.file
- C:\far2\farhun.lng.corona-lock
- C:\far2\farhun.hlf.corona-lock
- C:\far2\farger.lng.corona-lock
- C:\far2\fareng.lng.corona-lock
- C:\far2\fareng.hlf.corona-lock
- C:\far2\farcze.lng.corona-lock
- C:\totalcmd\wcuninst.wul.corona-lock
- C:\totalcmd\wcmicons.inc.corona-lock
- C:\totalcmd\totalcmd64.exe.manifest.corona-lock
- C:\totalcmd\totalcmd.inc.corona-lock
- C:\totalcmd\totalcmd.chm.corona-lock
- C:\totalcmd\tcuninst.wul.corona-lock
- C:\far2\farpol.lng.corona-lock
- C:\totalcmd\tcunin64.wul.corona-lock
- C:\totalcmd\sfxhead.sfx.corona-lock
- C:\far2\far.map.corona-lock
- C:\totalcmd\no.bar.corona-lock
- C:\far2\clearpluginscache.cmd.corona-lock
- C:\totalcmd\keyboard.txt.corona-lock
- C:\far2\changelog_eng.corona-lock
- C:\totalcmd\history.txt.corona-lock
- C:\totalcmd\descript.ion.corona-lock
- C:\totalcmd\default.bar.corona-lock
- C:\far2\changelog.corona-lock
- D:\install.log.corona-lock
- %HOMEPATH%\desktop\readme_lock.txt
- C:\totalcmd\size!.txt.corona-lock
- C:\far2\farrus.hlf.corona-lock
Deletes the following files
- <Drive name for removable media>:\uep_form_786_bulletin_1726i602.doc.corona-lock
Changes user data files extensions (Trojan.Encoder).
Miscellaneous
Executes the following
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=c: /on=c: /maxsize=401MB
- '<SYSTEM32>\vssvc.exe'
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=c: /on=c: /maxsize=unbounded
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=d: /on=d: /maxsize=401MB
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=d: /on=d: /maxsize=unbounded
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=e: /on=e: /maxsize=401MB
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=e: /on=e: /maxsize=unbounded
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=f: /on=f: /maxsize=401MB
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=f: /on=f: /maxsize=unbounded
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=g: /on=g: /maxsize=401MB
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=g: /on=g: /maxsize=unbounded
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=h: /on=h: /maxsize=401MB
- '%WINDIR%\syswow64\vssadmin.exe' Resize ShadowStorage /for=h: /on=h: /maxsize=unbounded
- '%WINDIR%\syswow64\wbem\wmic.exe' SHADOWCOPY /nointeractive
