RANSOM_CRYPRAAS.SM

This is the Trend Micro detection for the Encryptor RaaS (Ransomware as a Service) that has the capability to set deadlines as well as for the ransom amount to increase. This new platform allows attackers and cybercriminals to create their own ransomware for free.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan drops the following non-malicious files:

• %Desktop%\encryptor_raas_readme_liesmich.txt - ransom notes

(Note: %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Information Theft

This Trojan gathers the following data:

• Machine GUID

Other Details

This Trojan encrypts files with the following extensions:

• 3dm
• 3ds
• 3g2
• 3gp
• 7z
• abw
• accdb
• ai
• aif
• arc
• as
• asc
• asf
• ashdisc
• asm
• asp
• aspx
• asx
• aup
• avi
• bbb
• bdb
• bibtex
• bkf
• bmp
• bpn
• btd
• bz2
• cdi
• cer
• cert
• cfm
• cgi
• cpio
• cpp
• crt
• csr
• cue
• c++
• dds
• dem
• dmg
• doc
• docm
• docx
• dsb
• dwg
• dxf
• eddx
• edoc
• eml
• emlx
• eps
• epub
• fdf
• ffu
• flv
• gam
• gcode
• gho
• gif
• gpx
• gz
• hbk
• hdd
• hds
• hpp
• h++
• ics
• idml
• iff
• img
• indd
• ipd
• iso
• isz
• iwa
• j2k
• jp2
• jpf
• jpeg
• jpg
• jpm
• jpx
• jsp
• jspa
• jspx
• jst
• key
• keynote
• kml
• kmz
• lic
• lwp
• lzma
• m3u
• m4a
• m4v
• max
• mbox
• md2
• mdb
• mdbackup
• mddata
• mdf
• mdinfo
• mds
• mid
• mov
• mp3
• mp4
• mpa
• mpb
• mpeg
• mpg
• mpj
• mpp
• msg
• mso
• nba
• nbf
• nbi
• nbu
• nbz
• nco
• nes
• note
• nrg
• nri
• ods
• odt
• ogg
• ova
• ovf
• oxps
• p2i
• p65
• p7
• pages
• pct
• pdf
• pem
• phtm
• phtml
• php
• php3
• php4
• php5
• phps
• phpx
• phpxx
• pl
• plist
• pmd
• pmx
• png
• ppdf
• pps
• ppsm
• ppsx
• ppt
• pptm
• pptx
• ps
• psd
• pspimage
• pst
• pub
• pvm
• qcn
• qcow
• qcow2
• qt
• ra
• rar
• raw
• rm
• rtf
• sbf
• set
• skb
• slf
• sme
• smm
• spb
• sql
• srt
• ssc
• ssi
• stg
• stl
• svg
• swf
• sxw
• syncdb
• tar
• tc
• tex
• tga
• thm
• tif
• tiff
• toast
• torrent
• tpl
• ts
• txt
• vbk
• vcard
• vcd
• vcf
• vdi
• vfs4
• vhd
• vhdx
• vmdk
• vob
• wbverify
• wav
• webm
• wmb
• wpb
• wps
• xdw
• xlr
• xls
• xlsx
• xz
• yuv
• zip
• zipx

NOTES:

It connects to the following website for instruction on how to recover the encrypted files:

• https://{BLOCKED}toraveidf7.onion.to/vict?cust={value}&guid={GUID}

It searches the files it encrypts in the following drives:

• Removable
• Fixed
• Network Drives

It avoids encrypting the following filenames:

• encryptor_raas_readme_liesmich.txt
• wallet.dat

It gives pressures to the victim by increasing the ransom payment price after the timeout.