Ransom.MSIL.FILESLOCKER.A

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 encrypts files with specific file extensions. It encrypts files found in specific folders. 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 vssadmin.exe Delete Shadows /All /Quiet

Other Details

This Ransomware does the following:

• After encrypting it connects to the following URL(s):
  https://{BLOCKED}o.co/239Ys5
  • That will redirect and display the following:
    https://i.{BLOCKED}i.net/2018/08/31/5b88484028ab1.png
    
• Displays a message after encrypting files:
  

Ransomware Routine

This Ransomware encrypts files with the following extensions:

• .gif
• .apk
• .groups
• .hdd
• .hpp
• .log
• .m2ts
• .m4p
• .mkv
• .mpeg
• .epub
• .yuv
• .ndf
• .nvram
• .ogg
• .ost
• .pab
• .pdb
• .pif
• .png
• .qed
• .qcow
• .otp
• .s3db
• .qcow2
• .rvt
• .st7
• .stm
• .vbox
• .vdi
• .vhd
• .vhdx
• .vmdk
• .vmsd
• .psafe3
• .vmx
• .vmxf
• .3fr
• .3pr
• .ab4
• .accde
• .accdr
• .accdt
• .ach
• .acr
• .sd0
• .sxw
• .adb
• .advertisements
• .agdl
• .ait
• .apj
• .asm
• .awg
• .back
• .backup
• .sti
• .oil
• .backupdb
• .bay
• .bdb
• .bgt
• .bik
• .bpw
• .cdr3
• .cdr4
• .cdr5
• .cdr6
• .ycbcra
• .cdrw
• .ce1
• .ce2
• .cib
• .craw
• .crw
• .csh
• .csl
• .db_journal
• .dc2
• .pptm
• .dcs
• .ddoc
• .ddrw
• .der
• .des
• .dgc
• .djvu
• .dng
• .drf
• .dxg
• .eml
• .ppt
• .erbsql
• .erf
• .exf
• .ffd
• .fh
• .fhd
• .flp
• .gray
• .grey
• .gry
• .hbk
• .ibd
• .7z
• .ibz
• .iiq
• .incpas
• .jpe
• .kc2
• .kdbx
• .kdc
• .kpdx
• .ldf
• .lua
• .mdc
• .mdf
• .mef
• .config
• .mfw
• .mmw
• .mny
• .mrw
• .myd
• .ndd
• .nef
• .nk2
• .nop
• .nrw
• .ns2
• .ns3
• .ldf
• .ns4
• .nwb
• .nx2
• .nxl
• .nyf
• .odb
• .odf
• .odg
• .odm
• .orf
• .otg
• .oth
• .py
• .ots
• .ott
• .p12
• .p7b
• .p7c
• .pdd
• .pem
• .plus_muhd
• .plc
• .pot
• .pptx
• .py
• .qba
• .qbr
• .qbw
• .qbx
• .qby
• .raf
• .rat
• .raw
• .rdb
• .rwl
• .rwz
• .conf
• .sda
• .sdf
• .sqlite
• .sqlite3
• .sqlitedb
• .sr2
• .srf
• .srw
• .st5
• .st8
• .std
• .stx
• .sxd
• .sxg
• .sxi
• .sxm
• .tex
• .wallet
• .wb2
• .wpd
• .x11
• .x3f
• .xis
• .ARC
• .contact
• .dbx
• .doc
• .docx
• .jnt
• .jpg
• .msg
• .oab
• .ods
• .pdf
• .pps
• .ppsm
• .prf
• .pst
• .rar
• .rtf
• .txt
• .wab
• .xls
• .xlsx
• .xml
• .zip
• .1cd
• .3ds
• .3g2
• .7zip
• .accdb
• .aoi
• .asf
• .asp
• .aspx
• .asx
• .avi
• .bak
• .cer
• .cfg
• .class
• .cs
• .css
• .csv
• .db
• .dds
• .dwg
• .dxf
• .flf
• .flv
• .html
• .idx
• .js
• .key
• .kwm
• .laccdb
• .lit
• .m3u
• .mbx
• .md
• .mdf
• .mid
• .mlb
• .mov
• .mp3
• .mp4
• .mpg
• .obj
• .odt
• .pages
• .php
• .psd
• .pwm
• .rm
• .safe
• .sav
• .save
• .sql
• .srt
• .swf
• .thm
• .vob
• .wav
• .wma
• .wmv
• .xlsb
• .3dm
• .aac
• .ai
• .arw
• .c
• .cdr
• .cls
• .cpi
• .cpp
• .cs
• .db3
• .docm
• .dot
• .dotm
• .dotx
• .drw
• .dxb
• .eps
• .fla
• .flac
• .fxg
• .java
• .m
• .m4v
• .max
• .mdb
• .pcd
• .pct
• .pl
• .potm
• .potx
• .ppam
• .ppsm
• .ppsx
• .pptm
• .ps
• .r3d
• .rw2
• .sldm
• .sldx
• .svg
• .tga
• .wps
• .xla
• .xlam
• .xlm
• .xlr
• .xlsm
• .xlt
• .xltm
• .xltx
• .xlw
• .act
• .adp
• .al
• .dip
• .docb
• .frm
• .gpg
• .jsp
• .lay
• .lay6
• .m4u
• .mml
• .myi
• .onetoc2
• .PAQ
• .ps1
• .sch
• .slk
• .snt
• .suo
• .tgz
• .tif
• .tiff
• .txt
• .uop
• .uot
• .vcd
• .wk1
• .wks
• .xlc

It encrypts files found in the following folders:

• %Desktop%
• %Favorites%
• %All Users Profile%
• %User Profile%
• %User Profile%\Desktop
• %User Profile%\Documents
• %User Profile%\Downloads
• %User Profile%\Pictures
• %User Profile%\Music
• %User Profile%\Searches
• %User Profile%\Videos
• %System Root%\Users
• %AppDataLocal%\Microsoft\Windows\History

(Note: %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Desktop on Windows Vista, 7, and 8.. %Favorites% is the current user's Favorites folder, which is usually C:\Documents and Settings\{user name}\Favorites on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\Favorites on Windows Vista, 7, and 8.. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000, XP, and Server 2003, or C:\ProgramData on Windows Vista, 7, and 8. . %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista, 7, and 8.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local on Windows Vista, 7, and 8.)

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

• .locked

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

• %Desktop%\#解密我的文件#.txt
• {All Drives}\#解密我的文件#.txt
  
• {All Drives}\#DECRYPT MY FILES#.txt
• %Desktop%\#DECRYPT MY FILES#.txt