Technical Information
To ensure autorun and distribution
Modifies the following registry keys
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /Z'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /C'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /e'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /I'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /y'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /l'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /O'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /G'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /k'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /A'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /W'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /f'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /s'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /D'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /v'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /X'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /b'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /R'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /m'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /q'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /J'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /n'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /u'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /T'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /p'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run\] 'cvfen' = '%HOMEPATH%\cvfen.exe /h'
Creates the following files on removable media
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\clip_480_5sec_6mbps_h264.mp4.lnk
- <Drive name for removable media>:\clip_1080_5sec_10mbps_h264.mp4.lnk
- <Drive name for removable media>:\spib_pima.pdf.lnk
- <Drive name for removable media>:\bc01.pdf.lnk
- <Drive name for removable media>:\2015-02-patients-topic-work-related-asthma-jobs.pdf.lnk
- <Drive name for removable media>:\2015-02-worms-nanoparticle-toxicity.pdf.lnk
- <Drive name for removable media>:\calibre.png.lnk
- <Drive name for removable media>:\bg_search_box.png.lnk
- <Drive name for removable media>:\arrow-down.png.lnk
- <Drive name for removable media>:\background.png.lnk
- <Drive name for removable media>:\music.lnk
- <Drive name for removable media>:\flower_trans_matte.wmv.lnk
- <Drive name for removable media>:\testwmv.wmv.lnk
- <Drive name for removable media>:\guide_reorganization_mapping.xls.lnk
- <Drive name for removable media>:\removedtitles_records.xls.lnk
- <Drive name for removable media>:\productos.xls.lnk
- <Drive name for removable media>:\new folder.lnk
- <Drive name for removable media>:\passwords.lnk
- <Drive name for removable media>:\documents.lnk
- <Drive name for removable media>:\pictures.lnk
- <Drive name for removable media>:\d0068197bb5a41fea16a220c45390606.mp4.lnk
- <Drive name for removable media>:\breakpoint.png.lnk
- <Drive name for removable media>:\video_1.mp4.lnk
- <Drive name for removable media>:\dashborder_120.bmp.lnk
- <Drive name for removable media>:\esek.ico
- <Drive name for removable media>:\cvfen.exe
- <Drive name for removable media>:\cvfenx.exe
- <Drive name for removable media>:\delete.avi.lnk
- <Drive name for removable media>:\split.avi.lnk
- <Drive name for removable media>:\archer.avi.lnk
- <Drive name for removable media>:\dashborder_192.bmp.lnk
- <Drive name for removable media>:\dashborder_144.bmp.lnk
- <Drive name for removable media>:\toolbar.bmp.lnk
- <Drive name for removable media>:\dialmap.bmp.lnk
- <Drive name for removable media>:\51.mp4.lnk
- <Drive name for removable media>:\tileimage.bmp.lnk
- <Drive name for removable media>:\coffee.bmp.lnk
- <Drive name for removable media>:\ovp25012015.doc.lnk
- <Drive name for removable media>:\hanni_umami_chapter.doc.lnk
- <Drive name for removable media>:\february_catalogue__2015.doc.lnk
- <Drive name for removable media>:\1189.jpg.lnk
- <Drive name for removable media>:\3.jpg.lnk
- <Drive name for removable media>:\13.jpg.lnk
- <Drive name for removable media>:\210252809.jpg.lnk
- <Drive name for removable media>:\video.mp4.lnk
- <Drive name for removable media>:\video.lnk
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%\cvfen.exe
Sets the 'hidden' attribute to the following files
- %HOMEPATH%\cvfen.exe
- <Drive name for removable media>:\autorun.inf
- <Drive name for removable media>:\esek.ico
- <Drive name for removable media>:\cvfen.exe
- <Drive name for removable media>:\cvfenx.exe
Network activity
Connects to
- '255.255.255.255':8000
UDP
- DNS ASK ns#.##ayer1532.com
- DNS ASK ns#.##deoall.org
- DNS ASK ns#.##deoall.net
Miscellaneous
Creates and executes the following
- '%HOMEPATH%\cvfen.exe'
