Ransom.MSIL.ENYBENY.C

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

It connects to certain websites to send and receive information. However, as of this writing, the said sites are inaccessible. It deletes itself after execution.

It encrypts files with specific file extensions. It drops files as ransom note.

Arrival Details

This Ransomware 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 Ransomware adds the following processes:

• cmd.exe /C timeout 2 && Del /Q /F {Malware Path}\{Malware Name}.exe

Download Routine

This Ransomware accesses the following websites to download files:

• http://gntsincrellysite.{BLOCKED}5.org/1234.jpg

It saves the files it downloads using the following names:

• C:\Users\{username}\hack.jpg

Other Details

This Ransomware connects to the following URL(s) to check for an Internet connection:

• https://www.google.com

It connects to the following website to send and receive information:

• http://gntsincrellysite.{BLOCKED}5.org/write.php?info={computer name}%20-%20{username}%20-%20{password used for encryption}

However, as of this writing, the said sites are inaccessible.

It deletes itself after execution.

Ransomware Routine

This Ransomware encrypts files with the following extensions:

• .txt
• .doc
• .docx
• .xls
• .xlsx
• .ppt
• .pptx
• .odt
• jpeg
• .png
• .csv
• .sql
• .mdb
• .sln
• .php
• .asp
• .aspx
• .html
• .xml
• .psd
• .sql
• .mp4
• .7z
• .rar
• .m4a
• .wma
• .avi
• .wmv
• .csv
• .d3dbsp
• .zip
• .sie
• .sum
• .ibank
• .t13
• .t12
• .qdf
• .gdb
• .tax
• .pkpass
• .bc6
• .bc7
• .bkp
• .qic
• .bkf
• .sidn
• .sidd
• .mddata
• .itl
• .itdb
• .icxs
• .hvpl
• .hplg
• .hkdb
• .mdbackup
• .syncdb
• .gho
• .cas
• .svg
• .map
• .wmo
• .itm
• .sb
• .fos
• .mov
• .vdf
• .ztmp
• .sis
• .sid
• .ncf
• .menu
• .layout
• .dmp
• .blob
• .esm
• .vcf
• .vtf
• .dazip
• .fpk
• .mlx
• .kf
• .iwd
• .vpk
• .tor
• .psk
• .rim
• .w3x
• .fsh
• .ntl
• .arch00
• .lvl
• .snx
• .cfr
• .ff
• .vpp_pc
• .lrf
• .m2
• .mcmeta
• .vfs0
• .mpqge
• .kdb
• .db0
• .dba
• .rofl
• .hkx
• .bar
• .upk
• .das
• .iwi
• .litemod
• .asset
• .forge
• .ltx
• .bsa
• .apk
• .re4
• .sav
• .lbf
• .slm
• .bik
• .epk
• .rgss3a
• .pak
• .big
• wallet
• .wotreplay
• .xxx
• .desc
• .py
• .m3u
• .flv
• .js
• .css
• .rb
• .p7c
• .pk7
• .p7b
• .p12
• .pfx
• .pem
• .crt
• .cer
• .der
• .x3f
• .srw
• .pef
• .ptx
• .r3d
• .rw2
• .rwl
• .raw
• .raf
• .orf
• .nrw
• .mrwref
• .mef
• .erf
• .kdc
• .dcr
• .cr2
• .crw
• .bay
• .sr2
• .srf
• .arw
• .3fr
• .dng
• .jpe
• .jpg
• .cdr
• .indd
• .ai
• .eps
• .pdf
• .pdd
• .dbf
• .mdf
• .wb2
• .rtf
• .wpd
• .dxg
• .xf
• .dwg
• .pst
• .accdb
• .mdb
• .pptm
• .pptx
• .ppt
• .xlk
• .xlsb
• .xlsm
• .xlsx
• .xls
• .wps
• .docm
• .docx
• .doc
• .odb
• .odc
• .odm
• .odp
• .ods
• .odt
• .veg

It avoids encrypting files found in the following folders:

• Windows
• Program Files
• Program Files (x86)

It appends the following extension to the file name of the encrypted files:

• .crypt888_C#

It drops the following file(s) as ransom note:

• {Encrypted Directory}\Warning.html