RANSOM_WANTMYFILES.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 connects to certain websites to send and receive information. 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 drops the following copies of itself into the affected system and executes them:

• %Application Data%\update.exe

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on 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 drops the following files:

• %Application Data%\file_list.txt
• %Application Data%\Locker_ID.txt
• %Application Data%\Pub_Key.xml

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on 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.)

Other Details

This Ransomware connects to the following website to send and receive information:

• http://{BLOCKED}yfiles.asia/r.php

It does the following:

• Execute the following commands:
  • vssadmin.exe delete shadows / ALL / Quiet
  • cipher /w:{Drive Letters}
• Display the following window:

  

It deletes itself after execution.

Ransomware Routine

This Ransomware encrypts files with the following extensions:

• .p7b
• .p7c
• .jfif
• .exif
• .mkv
• .wallet
• .meta
• .log
• .asf
• .pdf
• .xls
• .docx
• .xlsx
• .mp3
• .waw
• .jpg
• .jpeg
• .txt
• .rtf
• .doc
• .rar
• .zip
• .psd
• .tif
• .wma
• .gif
• .bmp
• .ppt
• .pptx
• .docm
• .xlsm
• .pps
• .ppsx
• .ppd
• .eps
• .png
• .ace
• .djvu
• .tar
• .cdr
• .max
• .wmv
• .avi
• .wav
• .mp4
• .pdd
• .php
• .aac
• .ac3
• .amf
• .amr
• .dwg
• .dxf
• .accdb
• .mod
• .tax2013
• .tax2014
• .oga
• .ogg
• .pbf
• .ra
• .raw
• .saf
• .val
• .wave
• .wow
• .wpk
• .3g2
• .3gp
• .3gp2
• .3mm
• .amx
• .avs
• .bik
• .dir
• .divx
• .dvx
• .evo
• .flv
• .qtq
• .tch
• .rts
• .rum
• .rv
• .scn
• .srt
• .stx
• .svi
• .swf
• .trp
• .vdo
• .wm
• .wmd
• .wmmp
• .wmx
• .wvx
• .xvid
• .3d
• .3d4
• .3df8
• .pbs
• .adi
• .ais
• .amu
• .arr
• .bmc
• .bmf
• .cag
• .cam
• .dng
• .ink
• .jif
• .jiff
• .jpc
• .jpf
• .jpw
• .mag
• .mic
• .mip
• .msp
• .nav
• .ncd
• .odc
• .odi
• .opf
• .qif
• .xwd
• .abw
• .act
• .adt
• .aim
• .ans
• .asc
• .ase
• .bdp
• .bdr
• .bib
• .boc
• .crd
• .diz
• .dot
• .dotm
• .dotx
• .dvi
• .dxe
• .mlx
• .err
• .euc
• .faq
• .fdr
• .fds
• .gthr
• .idx
• .kwd
• .lp2
• .ltr
• .mbox
• .msg
• .nfo
• .now
• .odm
• .oft
• .pwi
• .rng
• .rtx
• .run
• .ssa
• .text
• .unx
• .wbk
• .wsh
• .7z
• .arc
• .ari
• .arj
• .car
• .cbr
• .cbz
• .gz
• .gzig
• .jgz
• .pak
• .pcv
• .puz
• .rev
• .sdn
• .sen
• .sfs
• .sfx
• .sh
• .shar
• .shr
• .sqx
• .tbz2
• .tg
• .tlz
• .vsi
• .wad
• .war
• .xpi
• .z02
• .z04
• .zap
• .zipx
• .zoo
• .ipa
• .isu
• .jar
• .js
• .udf
• .adr
• .ap
• .aro
• .asa
• .ascx
• .ashx
• .asmx
• .asp
• .indd
• .asr
• .qbb
• .bml
• .cer
• .cms
• .crt
• .dap
• .htm
• .moz
• .svr
• .url
• .wdgt
• .abk
• .bic
• .big
• .blp
• .bsp
• .cgf
• .chk
• .col
• .cty
• .dem
• .elf
• .ff
• .gam
• .grf
• .h3m
• .h4r
• .iwd
• .ldb
• .lgp
• .lvl
• .map
• .md3
• .mdl
• .nds
• .pbp
• .ppf
• .pwf
• .pxp
• .sad
• .sav
• .scm
• .scx
• .sdt
• .spr
• .sud
• .uax
• .umx
• .unr
• .uop
• .usa
• .usx
• .ut2
• .ut3
• .utc
• .utx
• .uvx
• .uxx
• .vmf
• .vtf
• .w3g
• .w3x
• .wtd
• .wtf
• .ccd
• .cd
• .cso
• .disk
• .dmg
• .dvd
• .fcd
• .flp
• .img
• .isz
• .mdf
• .mds
• .nrg
• .nri
• .vcd
• .vhd
• .snp
• .bkf
• .ade
• .adpb
• .dic
• .cch
• .ctt
• .dal
• .ddc
• .ddcx
• .dex
• .dif
• .dii
• .itdb
• .itl
• .kmz
• .lcd
• .lcf
• .mbx
• .mdn
• .odf
• .odp
• .ods
• .pab
• .pkb
• .pkh
• .pot
• .potx
• .pptm
• .psa
• .qdf
• .qel
• .rgn
• .rrt
• .rsw
• .rte
• .sdb
• .sdc
• .sds
• .sql
• .stt
• .tcx
• .thmx
• .txd
• .txf
• .upoi
• .vmt
• .wks
• .wmdb
• .xl
• .xlc
• .xlr
• .xlsb
• .xltx
• .ltm
• .xlwx
• .mcd
• .cap
• .cc
• .cod
• .cp
• .cpp
• .cs
• .csi
• .dcp
• .dcu
• .dev
• .dob
• .dox
• .dpk
• .dpl
• .dpr
• .dsk
• .dsp
• .eql
• .ex
• .f90
• .fla
• .for
• .fpp
• .jav
• .java
• .lbi
• .owl
• .pl
• .plc
• .pli
• .pm
• .res
• .rsrc
• .so
• .swd
• .tpu
• .tpx
• .tu
• .tur
• .vc
• .yab
• .aip
• .amxx
• .ape
• .api
• .mxp
• .oxt
• .qpx
• .qtr
• .xla
• .xlam
• .xll
• .xlv
• .xpt
• .cfg
• .cwf
• .dbb
• .slt
• .bp2
• .bp3
• .bpl
• .clr
• .dbx
• .jc
• .potm
• .ppsm
• .prc
• .prt
• .shw
• .std
• .ver
• .wpl
• .xlm
• .yps
• .1cd
• .bck
• .html
• .bak
• .odt
• .pst
• .log
• .mpg
• .mpeg
• .odb
• .wps
• .xlk
• .mdb
• .dxg
• .wpd
• .wb2
• .dbf
• .ai
• .3fr
• .arw
• .srf
• .sr2
• .bay
• .crw
• .cr2
• .dcr
• .kdc
• .erf
• .mef
• .mrw
• .nef
• .nrw
• .orf
• .raf
• .rwl
• .rw2
• .r3d
• .ptx
• .pef
• .srw
• .x3f
• .der
• .pem
• .pfx
• .p12

It avoids encrypting files with the following strings in their file path:

• WindowsApps
• WinSxS
• System32
• Microsoft.NET
• SysWOW64
• SystemApps
• Windows

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

• %Desktop%\READ_ME.txt

(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.)

It leaves text files that serve as ransom notes containing the following text: