Analysis by: Jay Garcia
ALIASES:

Win32:Zbot-VCZ [Trj] (Avast); Ransom:Win32/Crypren.A [non_writable_container] (Microsoft)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

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.

  TECHNICAL DETAILS

File Size: 41,472 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 11 Feb 2019
Payload: Displays windows

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.

Other Details

This Ransomware does the following:

  • It displays the following if executed with the argument "/ih":

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .a
  • .a3w
  • .aac
  • .abk
  • .abr
  • .ace
  • .acr
  • .act
  • .ad
  • .adf
  • .adm
  • .adp
  • .adr
  • .ai
  • .aif
  • .ani
  • .ans
  • .ape
  • .apk
  • .arc
  • .arj
  • .as
  • .asc
  • .asf
  • .asp
  • .ato
  • .aty
  • .au
  • .au3
  • .avi
  • .axx
  • .b3d
  • .b64
  • .bak
  • .bas
  • .bat
  • .bfc
  • .bg
  • .bin
  • .bk2
  • .bmp
  • .bnk
  • .bps
  • .bpt
  • .brk
  • .btoa
  • .bv1
  • .bwp
  • .bz
  • .bz2
  • .c
  • .cab
  • .cal
  • .cam
  • .cas
  • .cbl
  • .cbt
  • .cda
  • .cdr
  • .cdt
  • .cfb
  • .cfg
  • .cfl
  • .cfm
  • .cgm
  • .chk
  • .cl
  • .cl3
  • .cl4
  • .cla
  • .clg
  • .clk
  • .cll
  • .clo
  • .clp
  • .clr
  • .cls
  • .cmd
  • .cmv
  • .cne
  • .cnf
  • .cnt
  • .cnv
  • .cob
  • .cod
  • .com
  • .cpe
  • .cpi
  • .cpl
  • .cpp
  • .cpt
  • .cr2
  • .crd
  • .crt
  • .crw
  • .css
  • .csv
  • .cue
  • .cur
  • .cv5
  • .cvi
  • .cvs
  • .cvx
  • .cxf
  • .cxx
  • .d
  • .daa
  • .daf
  • .dat
  • .db
  • .db2
  • .dbc
  • .dbf
  • .dbk
  • .dbm
  • .dbo
  • .dbq
  • .dbt
  • .dbv
  • .dbw
  • .dbx
  • .dcm
  • .dcr
  • .dcu
  • .dcx
  • .dds
  • .deb
  • .dev
  • .dib
  • .dif
  • .djvu
  • .dll
  • .dmd
  • .dmf
  • .dmo
  • .dmp
  • .dms
  • .dne
  • .dng
  • .doc
  • .docx
  • .dos
  • .dot
  • .dpr
  • .drv
  • .drw
  • .dsk
  • .dt_
  • .dta
  • .dtd
  • .dtf
  • .dtm
  • .dun
  • .dwf
  • .dwg
  • .dx
  • .dxf
  • .dxn
  • .dxr
  • .dyn
  • .ecw
  • .eeb
  • .eef
  • .eft
  • .ega
  • .elg
  • .emf
  • .eml
  • .emu
  • .enc
  • .end
  • .eng
  • .env
  • .epg
  • .eps
  • .eqn
  • .erd
  • .erm
  • .err
  • .esh
  • .evt
  • .ex3
  • .exc
  • .exd
  • .exp
  • .ext
  • .fcp
  • .fdf
  • .fes
  • .ff
  • .ffa
  • .fff
  • .ffl
  • .ffo
  • .fft
  • .ffx
  • .fits
  • .flac
  • .flv
  • .fnd
  • .fon
  • .fpb
  • .fpr
  • .fpx
  • .fqy
  • .fr3
  • .frc
  • .frm
  • .fro
  • .frp
  • .frs
  • .frt
  • .frx
  • .frz
  • .fsc
  • .fsh
  • .g3
  • .gho
  • .gif
  • .gr2
  • .gr3
  • .gra
  • .grb
  • .grf
  • .grp
  • .gz
  • .h
  • .hbk
  • .hdl
  • .hdr
  • .hdx
  • .hex
  • .hfi
  • .hgl
  • .hh
  • .hhh
  • .hhp
  • .his
  • .hlp
  • .hpgl
  • .hqx
  • .hsq
  • .hss
  • .hst
  • .hta
  • .htm
  • .html
  • .htt
  • .ica
  • .icb
  • .icc
  • .ice
  • .icl
  • .icm
  • .icn
  • .ico
  • .ics
  • .id
  • .idb
  • .idd
  • .ide
  • .idf
  • .idq
  • .idx
  • .iff
  • .ifo
  • .ima
  • .img
  • .inf
  • .ini
  • .ins
  • .ipd
  • .ipf
  • .iso
  • .iw44
  • .iwa
  • .j2k
  • .jar
  • .jas
  • .jef
  • .jng
  • .jp2
  • .jpc
  • .jpeg
  • .jpg
  • .jpm
  • .js
  • .jsb
  • .jsd
  • .jse
  • .jsh
  • .jsl
  • .jsm
  • .json
  • .jsp
  • .jss
  • .jt
  • .jtf
  • .jtk
  • .jtp
  • .jw
  • .jwl
  • .jzz
  • .k2p
  • .kar
  • .kbc
  • .kdc
  • .kdp
  • .kfx
  • .kye
  • .lbm
  • .ldf
  • .lgc
  • .lha
  • .lib
  • .lnk
  • .log
  • .lwf
  • .lwp
  • .lzh
  • .mac
  • .mbx
  • .mcd
  • .md
  • .mda
  • .mdb
  • .mde
  • .mdf
  • .mdl
  • .mdm
  • .mdn
  • .mdp
  • .mdt
  • .mdw
  • .mdx
  • .mdz
  • .meb
  • .med
  • .mem
  • .mht
  • .mid
  • .mim
  • .mix
  • .mk3d
  • .mka
  • .mks
  • .mkv
  • .mme
  • .mng
  • .mod
  • .mov
  • .mp1
  • .mp2
  • .mp3
  • .mp4
  • .mpg
  • .mpp
  • .mrw
  • .msc
  • .msi
  • .msn
  • .msp
  • .mtf
  • .mtm
  • .mtv
  • .mtw
  • .mu
  • .mul
  • .mup
  • .mus
  • .mvb
  • .mve
  • .mvf
  • .mwp
  • .mxd
  • .mxt
  • .myd
  • .n64
  • .na2
  • .nab
  • .nap
  • .ndf
  • .nds
  • .ndx
  • .nef
  • .nes
  • .neta
  • .nfo
  • .ngf
  • .ngg
  • .nhf
  • .nil
  • .nil
  • .nlb
  • .nld
  • .nlm
  • .nmi
  • .nol
  • .now
  • .nra
  • .nrb
  • .nrg
  • .ns2
  • .ns5
  • .nso
  • .nt
  • .num
  • .nzb
  • .obj
  • .oca
  • .ocx
  • .ogg
  • .ogm
  • .olb
  • .old
  • .ole
  • .oli
  • .orf
  • .ori
  • .otl
  • .pab
  • .pak
  • .pb
  • .pbd
  • .pbf
  • .pbi
  • .pbk
  • .pbl
  • .pbm
  • .pbo
  • .pbr
  • .pbt
  • .pcd
  • .pcx
  • .pda
  • .pdb
  • .pdd
  • .pdf
  • .pdl
  • .pds
  • .pdv
  • .pdw
  • .pef
  • .pf
  • .pgm
  • .php
  • .pic
  • .pict
  • .pif
  • .pjf
  • .pkg
  • .pl
  • .plb
  • .plc
  • .pld
  • .plg
  • .pli
  • .pll
  • .plm
  • .pln
  • .plr
  • .pls
  • .plt
  • .ply
  • .png
  • .pot
  • .pp
  • .pp4
  • .pp5
  • .ppa
  • .ppb
  • .ppd
  • .ppf
  • .ppi
  • .ppl
  • .ppm
  • .ppo
  • .pps
  • .ppt
  • .ppz
  • .ps2
  • .psd
  • .psp
  • .pst
  • .pwa
  • .pwd
  • .pwf
  • .pwl
  • .pwp
  • .pwz
  • .px
  • .pxl
  • .py
  • .pyc
  • .pyd
  • .pyw
  • .pza
  • .pzd
  • .pzl
  • .pzo
  • .pzp
  • .pzs
  • .pzt
  • .pzx
  • .qic
  • .qt
  • .qtif
  • .qxd
  • .qxl
  • .qxt
  • .ra
  • .raf
  • .ram
  • .rar
  • .ras
  • .rc
  • .rd1
  • .rd3
  • .rd4
  • .rd5
  • .rdb
  • .rdl
  • .rdx
  • .rec
  • .rgb
  • .rle
  • .rmi
  • .rpb
  • .rpd
  • .rpm
  • .rpt
  • .rtf
  • .rwz
  • .sha
  • .txt

It encrypts files found in the following folders:

  • %ProgramData%
  • C:\Users

(Note: %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData in Windows Vista, 7, and 8.)

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.806.02
FIRST VSAPI PATTERN DATE: 11 Feb 2019
VSAPI OPR PATTERN File: 14.807.00
VSAPI OPR PATTERN Date: 12 Feb 2019

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Identify and terminate files detected as Ransom.Win32.PONY.THBAAAI

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.PONY.THBAAAI. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:

Step 5

Restore encrypted files from backup.


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