RANSOM_SURPRISE.A

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

It gathers certain information on the affected computer.

Arrival Details

This malware 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 malware drops the following component file(s):

• %Desktop%\DECRYPTION_HOWTO.Notepad - ransomnote.
• %Desktop%\surprise.bat - removes Shadow Volume Copies when executed.
• %Desktop%\Encrypted_Files.Notepad - list of encrypted files

(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:

• What happened to your files ?
  All of your files were protected by a strong encryption.
  There is no way to decrypt your files without the key.
  If your files notimportant for you just reinstall your system.
  If your files is important just email us to discuss the price and how to decrypt your files.
  You can email us tonowayout@{BLOCKED}mail.com and nowayout@{BLOCKED}t.org
  Write your Email to both email addresses PLS
  We accept just BITCOIN if you dont know what it is just google it.
  We will give instructions where and how you buy bitcoin in your country.
  Price depends on how important your files and network is.it could be 0.5 bitcoin to 25 bitcoin.
  You can send us a 1 encrypted file for decryption.
  Feel free to email us with your country and computer name and username of the infected system.

Other System Modifications

This malware modifies the following file(s):

• It renames encrypted files by adding ".surprise"

Information Theft

This malware gathers the following information on the affected computer:

• Machine Name
• User Name

Stolen Information

This malware sends the gathered information via HTTP POST to the following URL:

• http://{BLOCKED}udio.duckdns.org/pull.php

Other Details

This malware encrypts files with the following extensions:

• .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
• .man
• .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
• .p7b
• .p7c
• .jfif
• .exif
• .rar

It does the following:

• Skips files with names containing the following string/s:
  
  • $
  • c:\windows
  • c:\program
• It does not perform its intended routine if the following applications are seen:
  
  • VBOX
  • QEMU
  • VMWARE
• It executes the following command to delete shadow copies:
  
  • vssadmin.exe Delete Shadows /All /Quiet

NOTES:

This ransomware is seen to be delivered via the remote desktop control app TeamViewer.