RANSOM_CRYPZABLO.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.

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.

Autostart Technique

This Ransomware drops the following files:

• %ProgramData%\Keyboard{execution date/time}.log
• %ProgramData%\Keyboard{execution date/time}.error

(Note: %ProgramData% is the Program Data folder, where it usually is C:\Program Files in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData 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.)

It creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
AESxWin = {malware path}

Other Details

This Ransomware encrypts files with the following extensions:

• .jpg
• .jpeg
• .png
• .gif
• .bmp
• .groups
• .hdd
• .hpp
• .m2ts
• .m4p
• .mpeg
• .ndf
• .nvram
• .ogg
• .ost
• .pab
• .pdb
• .pif
• .qed
• .qcow
• .qcow2
• .rvt
• .st7
• .stm
• .vbox
• .vdi
• .vhd
• .vhdx
• .vmdk
• .vmsd
• .vmx
• .vmxf
• .3fr
• .3pr
• .ab4
• .accde
• .accdr
• .accdt
• .ach
• .acr
• .adb
• .ads
• .agdl
• .ait
• .apj
• .asm
• .awg
• .back
• .backup
• .backupdb
• .bay
• .bdb
• .bgt
• .bik
• .bpw
• .cdr3
• .cdr4
• .cdr5
• .cdr6
• .cdrw
• .ce1
• .ce2
• .cib
• .craw
• .crw
• .csh
• .csl
• .db_journal
• .dc2
• .dcs
• .ddoc
• .ddrw
• .der
• .des
• .dgc
• .djvu
• .dng
• .drf
• .dxg
• .eml
• .erbsql
• .erf
• .exf
• .ffd
• .fh
• .fhd
• .gray
• .grey
• .gry
• .hbk
• .ibd
• .ibz
• .iiq
• .incpas
• .jpe
• .kc2
• .kdbx
• .kdc
• .kpdx
• .lua
• .mdc
• .mef
• .mfw
• .mmw
• .mny
• .mrw
• .myd
• .ndd
• .nef
• .nk2
• .nop
• .nrw
• .ns2
• .ns3
• .ns4
• .nwb
• .nx2
• .nxl
• .nyf
• .odb
• .odf
• .odg
• .odm
• .orf
• .otg
• .oth
• .otp
• .ots
• .ott
• .p12
• .p7b
• .p7c
• .pdd
• .pem
• .plus_muhd
• .plc
• .pot
• .pptx
• .psafe3
• .py
• .qba
• .qbr
• .qbw
• .qbx
• .qby
• .raf
• .rat
• .raw
• .rdb
• .rwl
• .rwz
• .s3db
• .sd0
• .sda
• .sdf
• .sqlite
• .sqlite3
• .sqlitedb
• .sr2
• .srf
• .srw
• .st5
• .st8
• .std
• .sti
• .stw
• .stx
• .sxd
• .sxg
• .sxi
• .sxm
• .tex
• .wallet
• .wb2
• .wpd
• .x11
• .x3f
• .xis
• .ycbcra
• .yuv
• .contact
• .dbx
• .doc
• .docx
• .jnt
• .msg
• .oab
• .ods
• .pdf
• .pps
• .ppsm
• .ppt
• .pptm
• .prf
• .pst
• .rar
• .rtf
• .wab
• .xls
• .xlsx
• .xml
• .zip
• .1cd
• .3ds
• .3g2
• .3gp
• .7z
• .7zip
• .accdb
• .aoi
• .asf
• .asp
• .aspx
• .asx
• .avi
• .bak
• .cer
• .cfg
• .class
• .config
• .css
• .csv
• .db
• .dds
• .dwg
• .dxf
• .flf
• .flv
• .html
• .idx
• .js
• .key
• .kwm
• .laccdb
• .ldf
• .lit
• .m3u
• .mbx
• .md
• .mdf
• .mid
• .mlb
• .mov
• .mp4
• .mpg
• .obj
• .odt
• .ods
• .odp
• .pages
• .php
• .psd
• .pwm
• .rm
• .safe
• .sav
• .save
• .sql
• .srt
• .swf
• .thm
• .vob
• .wav
• .wma
• .wmv
• .xlsb3dm
• .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
• .bkp
• .blend
• .cdf
• .cdx
• .cgm
• .cr2
• .crt
• .dac
• .dbf
• .dcr
• .ddd
• .design
• .dtd
• .fdb
• .fff
• .fpx
• .h
• .iif
• .indd
• .jpeg
• .mos
• .nd
• .nsd
• .nsf
• .nsg
• .nsh
• .odc
• .odp
• .oil
• .pas
• .pat
• .pef
• .pfx
• .ptx
• .qbb
• .qbm
• .sas7bdat
• .say
• .st4
• .st6
• .stc
• .sxc
• .sxw
• .tlg
• .wad
• .xlk
• .aiff
• .bin
• .cmt
• .dat
• .dit
• .edb
• .flvv
• .ntx
• .xsd
• .pem
• .xsd
• .xsl
• .ewd
• .dbt
• .ob
• .gofin
• .dsf
• .ds4
• .shx
• .ath
• .bac
• .ts
• .dst
• .dwfx

Ransomware Routine

This Ransomware appends the following extension to the file name of the encrypted files:

• ZABLOKOWANE

NOTES:

It avoids infecting the following folders:

• -%Application Data%
• -%AppDataLocal%
• -%ProgramData%

It shows the following window:

Pressing stop button stops malware execution.

It drops the ransom note on {directory of encrypted files} with name ### - ODZYSKAJ SWOJE DANE - ###.TXT

If /reg is used as parameter, it adds the following registry entries:

• HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\Directory\\Background\\shell\\AESxWin
  (Default)= Encrypt\\Decrypt with AESxWin
• HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\Directory\\Background\\shell\\AESxWin&
  icon = {malware full path}
• HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\Directory\\Background\\shell\\AESxWin
  (Default) = {malware full path}
• HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\Directory\\shell\\AESxWin
  (Default) = Encrypt\\Decrypt with AESxWin
• HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\Directory\\shell\\AESxWin
  icon data = {malware full path}
• HKEY_LOCAL_MACHINE\\SOFTWARE\\Classes\\Directory\\shell\\AESxWin\\command
  (Default) = {malware full path}

It edits the folder context menu:

It also shows the following message box after registration:

If /unreg is used as parameter, it removes the registries stated above and shows the following message box: