RANSOM_KRAKEN.RNB

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 is capable of encrypting files in the affected system.

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 drops the following files:

• {Encrypted File Directory}\Touch ← Marker to check if the directory is already encrypted, deleted afterwards.

It adds the following processes:

• "cmd.exe" /C sc config eventlog start=disabled
• "cmd.exe" /C REG add "HKLM\SYSTEM\CurrentControlSet\services\eventlog" / v Start / t REG_DWORD / d 4 / f
• "tasklist" /V /FO CSV

Other System Modifications

This Ransomware adds the following registry entries:

HKEY_CURRENT_USER\Console
WordLoad = 1

Process Termination

This Ransomware terminates the following processes if found running in the affected system's memory:

• agntsvcagntsvc
• agntsvcencsvc
• agntsvcisqlplussvc
• dbeng50
• dbsnmp
• firefoxconfig
• msftesql
• mydesktopqos
• mydesktopservice
• mysqld
• mysqld-nt
• mysqld-opt
• ocomm
• ocssd
• oracle
• sqbcoreservice
• sqlagent
• sqlbrowser
• sqlservr
• sqlwriter
• sqlwb
• synctime
• tbirdconfig
• xfssvccon
• notepad

Other Details

This Ransomware encrypts files with the following extensions:

• 1cd
• 3dm
• 3ds
• 3fr
• 3g2
• 3gp
• 3pr
• 7z
• 7zip
• aac
• ab4
• abd
• accdb
• accde
• accdr
• accdt
• ach
• acr
• act
• adb
• adp
• ads
• agdl
• ai
• aiff
• ait
• al
• aoi
• apj
• arw
• ascx
• asf
• asm
• asp
• aspx
• asx
• atb
• avi
• awg
• back
• backup
• backupdb
• bak
• bank
• bay
• bdb
• bgt
• bik
• bin
• bkp
• blend
• bmp
• bpw
• c
• cdb
• cdf
• cdr
• cdr3
• cdr4
• cdr5
• cdr6
• cdrw
• cdx
• ce1
• ce2
• cer
• cfg
• cfn
• cgm
• cib
• class
• cls
• cmt
• config
• contact
• cpi
• cpp
• cr2
• craw
• crt
• crw
• cs
• csh
• csl
• css
• csv
• dac
• dat
• db
• db3
• dbf
• dbx
• db_journal
• dc2
• dcr
• dcs
• ddd
• ddoc
• ddrw
• dds
• def
• der
• des
• design
• dgc
• dit
• djvu
• dng
• doc
• docm
• docx
• dot
• dotm
• dotx
• drf
• drw
• dtd
• dwg
• dxb
• dxf
• dxg
• edb
• eml
• eps
• erbsql
• erf
• exf
• fdb
• ffd
• fff
• fh
• fhd
• fla
• flac
• flb
• flf
• flv
• flvv
• fpx
• fxg
• gif
• gray
• grey
• groups
• gry
• h
• hbk
• hdd
• hpp
• html
• ibank
• ibd
• ibz
• idx
• iif
• iiq
• incpas
• indd
• info
• info_
• ini
• jar
• java
• jnt
• jpe
• jpeg
• jpg
• js
• json
• kc2
• kdbx
• kdc
• key
• kpdx
• kwm
• laccdb
• lck
• ldf
• lit
• lock
• log
• lua
• m
• m2ts
• m3u
• m4p
• m4v
• mab
• mapimail
• max
• mbx
• md
• mdb
• mdc
• mdf
• mef
• mfw
• mid
• mkv
• mlb
• mmw
• mny
• moneywell
• mos
• mov
• mp3
• mp4
• mpeg
• mpg
• mrw
• msf
• msg
• myd
• nd
• ndd
• ndf
• nef
• nk2
• nop
• nrw
• ns2
• ns3
• ns4
• nsd
• nsf
• nsg
• nsh
• nvram
• nwb
• nx2
• nxl
• nyf
• oab
• obj
• odb
• odc
• odf
• odg
• odm
• odp
• ods
• odt
• ogg
• oil
• omg
• orf
• ost
• otg
• oth
• otp
• ots
• ott
• p7b
• p7c
• p12
• pab
• pages
• pas
• pat
• pbf
• pcd
• pct
• pdb
• pdd
• pdf
• pef
• pem
• pfx
• php
• pif
• pl
• plc
• plus_muhd
• pm!
• pm
• pmi
• pmj
• pml
• pmm
• pmo
• pmr
• pnc
• pnd
• png
• pnx
• pot
• potm
• potx
• ppam
• pps
• ppsm
• ppsm
• ppsx
• ppt
• pptm
• pptm
• pptx
• prf
• ps
• psafe3
• psd
• pspimage
• pst
• ptx
• pwm
• py
• qba
• qbb
• qbm
• qbr
• qbw
• qbx
• qby
• qcow
• qcow2
• qed
• qtb
• r3d
• raf
• rar
• rat
• raw
• rdb
• rm
• rtf
• rvt
• rw2
• rwl
• rwz
• s3db
• safe
• sas7bdat
• sav
• save
• say
• sd0
• sda
• sdb
• sdf
• sh
• sldm
• sldx
• sql
• sqlite
• sqlite-shm
• sqlite-wal
• sqlite3
• sqlitedb
• sr2
• srb
• srf
• srs
• srt
• srw
• st4
• st5
• st6
• st7
• st8
• stc
• std
• sti
• stm
• stw
• stx
• svg
• swf
• sxc
• sxd
• sxg
• sxi
• sxm
• sxw
• tbb
• tbn
• tex
• tga
• thm
• tlg
• tlx
• txt
• usr
• vbox
• vdi
• vhd
• vhdx
• vmdk
• vmsd
• vmx
• vmxf
• vob
• wab
• wad
• wallet
• war
• wav
• wb2
• wma
• wmf
• wmv
• wpd
• wps
• x3f
• x11
• xis
• xla
• xlam
• xlk
• xlm
• xlr
• xls
• xlsb
• xlsm
• xlsx
• xlt
• xltm
• xltx
• xlw
• xml
• ycbcra
• yuv
• zip

It does the following:

• Will not proceed if the keyboard layout contains one of the following value:
  • 1058 = Ukrainian
  • 1059 = Belarusian
  • 1061 = Estonian
  • 1062 = Latvian
  • 1063 = Lithuanian
  • 1064 = Tajik
  • 1065 = Persian
  • 1067 = Armenian
  • 1068 = Azeri (Latin)
  • 1079 = Georgian
  • 1087 = Kazakh
  • 1088 = Kyrgyz (Cyrillic)
  • 1090 = Turkmen
  • 1091 = Uzbek (Latin)
  • 1092 = Tatar
• Will not encrypt if the user's IP is from the following country:
  • am = Armenia
  • az = Azerbaijan
  • by = Belarus
  • ee = Estonia
  • ge = Georgia
  • ir = Iran
  • kg = Kyrgyzstan
  • kz = Kazakhstan
  • lt = Lithuania
  • lv = Latvia
  • md = Moldova
  • ru = Russia
  • tj = Tajikistan
  • tm = Turkmenistan
  • ua = Ukraine
  • uz = Uzbekistan
• executes the following if appcheck.exe is running:
  • cmd.exe", "/C reg add \"HKLM\\SOFTWARE\\CheckMAL\\AppCheck\" /v ProductVersion /t REG_SZ /d \"Please contact with \"Kraken Cryptor\" support for decrypt your files.\" /f
  • cmd.exe", "/C reg add \"HKLM\\SOFTWARE\\CheckMAL\\AppCheck\" /v RansomBackupExt/t REG_SZ /d \"NULL\" /f
  • cmd.exe", "/C reg add \"HKLM\\SOFTWARE\\CheckMAL\\AppCheck\" /v RansomBackupExt/t REG_SZ /d \"NULL\" /f
  • cmd.exe", "/C taskkill /F /IM appcheck.exe
• It encrypts files found in all fixed, removable and network drives.

It is capable of encrypting files in the affected system.

Ransomware Routine

This Ransomware avoids encrypting files with the following strings in their file name:

• bootsect.bak
• desktop.ini
• iconcache.db
• ntuser.dat
• thumbs.db

It avoids encrypting files found in the following folders:

• $recycle.bin
• system volume information
• $windows.~bt
• boot
• drivers
• program files
• program files (x86)
• programdata
• all users
• windows
• windows.old
• appdata
• programdata
• sample videos
• sample pictures
• sample music
• my videos
• my pictures
• my music
• test folder

It renames encrypted files using the following names:

• {Encrypted File Number}-Lock.onion

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

• {Encrypted Folder}\# How to Decrypt Files.txt