RANSOM_EXMAS.M
Trojan:Win32/Tiggre!rfn (Microsoft) ; Ransom.BTCware (Norton) ; Trojan.GenericKD.12615357 (Bitdefender)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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 steals certain information from the system and/or the user.
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.
TECHNICAL DETAILS
45,568 bytes
EXE
No
23 Nov 2017
Encrypts files, Displays message/message boxes, Steals information, Connects to URLs/IPs
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 adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
Adobe = {Malware Path}\{Malware Name}.exe
Information Theft
This Ransomware steals the following information:
- User ID
- Username
- Computer Name
- Date and time of encryption
- User’s access rights
Other Details
This Ransomware connects to the following website to send and receive information:
- {BLOCKED}1.{BLOCKED}_da_test__/gate.php
It deletes itself after execution.
Ransomware Routine
This Ransomware encrypts files with the following extensions:
- .001
- .1cd
- .3d
- .3d4
- .3df8
- .3dm
- .3ds
- .3fr
- .3g2
- .3ga
- .3gp
- .3gp2
- .3mm
- .3pr
- .7z
- .7zip
- .8ba
- .8bc
- .8be
- .8bf
- .8bi8
- .8bl
- .8bs
- .8bx
- .8by
- .8li
- .a2c
- .aa
- .aa3
- .aac
- .aaf
- .ab4
- .abk
- .abw
- .ac2
- .ac3
- .accdb
- .accde
- .accdr
- .accdt
- .ace
- .ach
- .acr
- .act
- .adb
- .ade
- .adi
- .adp
- .adpb
- .adr
- .ads
- .adt
- .aep
- .aepx
- .aes
- .aet
- .afp
- .agd1
- .agdl
- .ai
- .aif
- .aiff
- .aim
- .aip
- .ais
- .ait
- .ak
- .al
- .allet
- .alphacrypt
- .amf
- .amr
- .amu
- .amx
- .amxx
- .ans
- .aoi
- .ap
- .ape
- .api
- .apj
- .apk
- .apnx
- .app
- .arc
- .arch00
- .ari
- .arj
- .aro
- .arr
- .arw
- .as
- .as3
- .asa
- .asc
- .ascx
- .ase
- .asf
- .ashx
- .asm
- .asmx
- .asp
- .aspx
- .asr
- .asset
- .asx
- .automaticdestinations-ms
- .avi
- .avs
- .awg
- .azf
- .azs
- .azw
- .azw1
- .azw3
- .azw4
- .b2a
- .back
- .backup
- .backupdb
- .bad
- .bak
- .bank
- .bar
- .bat
- .bay
- .bc6
- .bc7
- .bck
- .bcp
- .bdb
- .bdp
- .bdr
- .bfa
- .bgt
- .bi8
- .bib
- .bic
- .big
- .bik
- .bin
- .bkf
- .bkp
- .bkup
- .blend
- .blob
- .blp
- .bmc
- .bmf
- .bml
- .bmp
- .boc
- .bp2
- .bp3
- .bpk
- .bpl
- .bpw
- .brd
- .bsa
- .bsk
- .bsp
- .btoa
- .bvd
- .bz2
- .c
- .cag
- .cam
- .camproj
- .cap
- .car
- .cas
- .cat
- .cbf
- .cbr
- .cbz
- .cc
- .ccd
- .ccf
- .cch
- .cd
- .cdf
- .cdi
- .cdr
- .cdr3
- .cdr4
- .cdr5
- .cdr6
- .cdrw
- .cdx
- .ce1
- .ce2
- .cef
- .cer
- .cert
- .cfg
- .cfm
- .cfp
- .cfr
- .cgf
- .cgi
- .cgm
- .cgp
- .chk
- .chml
- .cib
- .class
- .clr
- .cls
- .clx
- .cmd
- .cmf
- .cms
- .cmt
- .cnf
- .cng
- .cod
- .col
- .con
- .conf
- .config
- .contact
- .cp
- .cpi
- .cpio
- .cpp
- .cr2
- .craw
- .crd
- .crt
- .crw
- .crwl
- .crypt
- .crypted
- .cryptra
- .cryptXXX
- .cs
- .csh
- .csi
- .csl
- .cso
- .csr
- .css
- .csv
- .ctt
- .cty
- .cue
- .cwf
- .d3dbsp
- .dac
- .dal
- .dap
- .das
- .dash
- .dat
- .database
- .dayzprofile
- .dazip
- .db
- .db_journal
- .db0
- .db3
- .dba
- .dbb
- .dbf
- .dbfv
- .db-journal
- .dbx
- .dc2
- .dc4
- .dch
- .dco
- .dcp
- .dcr
- .dcs
- .dcu
- .ddc
- .ddcx
- .ddd
- .ddoc
- .ddrw
- .dds
- .default
- .dem
- .der
- .des
- .desc
- .design
- .desklink
- .dev
- .dex
- .dfm
- .dgc
- .dic
- .dif
- .dii
- .dim
- .dime
- .dip
- .dir
- .directory
- .disc
- .disk
- .dit
- .divx
- .diz
- .djv
- .djvu
- .dlc
- .dmg
- .dmp
- .dng
- .dob
- .doc
- .docb
- .docm
- .docx
- .dot
- .dotm
- .dotx
- .dox
- .dpk
- .dpl
- .dpr
- .drf
- .drw
- .dsk
- .dsp
- .dtd
- .dvd
- .dvi
- .dvx
- .dwg
- .dxb
- .dxe
- .dxf
- .dxg
- .e4a
- .edb
- .efl
- .efr
- .efu
- .efx
- .eip
- .elf
- .emc
- .emf
- .eml
- .enc
- .enx
- .epk
- .eps
- .epub
- .eql
- .erbsql
- .erf
- .err
- .esf
- .esm
- .euc
- .evo
- .ex
- .exf
- .exif
- .f90
- .faq
- .fcd
- .fdb
- .fdr
- .fds
- .ff
- .ffd
- .fff
- .fh
- .fhd
- .fla
- .flac
- .flf
- .flp
- .flv
- .flvv
- .for
- .forge
- .fos
- .fpenc
- .fpk
- .fpp
- .fpx
- .frm
- .fsh
- .fss
- .fxg
- .gadget
- .gam
- .gbk
- .gbr
- .gdb
- .ged
- .gfe
- .gfx
- .gho
- .gif
- .gpg
- .gpx
- .gray
- .grey
- .grf
- .groups
- .gry
- .gthr
- .gxk
- .gz
- .gzig
- .gzip
- .h
- .h3m
- .h4r
- .hbk
- .hbx
- .hdd
- .hex
- .hkdb
- .hkx
- .hplg
- .hpp
- .hqx
- .htm
- .html
- .htpasswd
- .hvpl
- .hwp
- .ibank
- .ibd
- .ibooks
- .ibz
- .ico
- .icxs
- .idl
- .idml
- .idx
- .ie5
- .ie6
- .ie7
- .ie8
- .ie9
- .iff
- .iif
- .iiq
- .img
- .incpas
- .indb
- .indd
- .indl
- .indt
- .ink
- .inx
- .ipa
- .iso
- .isu
- .isz
- .itdb
- .itl
- .itm
- .iwd
- .iwi
- .jac
- .jar
- .jav
- .java
- .jbc
- .jc
- .jfif
- .jge
- .jgz
- .jif
- .jiff
- .jks
- .jnt
- .jpc
- .jpe
- .jpeg
- .jpf
- .jpg
- .jpw
- .js
- .json
- .jsp
- .just
- .k25
- .kc2
- .kdb
- .kdbx
- .kdc
- .kde
- .key
- .kf
- .klq
- .kml
- .kmz
- .kpdx
- .kwd
- .kwm
- .laccdb
- .lastlogin
- .lay
- .lay6
- .layout
- .lbf
- .lbi
- .lcd
- .lcf
- .lcn
- .ldb
- .ldf
- .lgp
- .lib
- .lit
- .litemod
- .lngttarch2
- .localstorage
- .locky
- .log
- .lp2
- .lpa
- .lrf
- .ltm
- .ltr
- .ltx
- .lua
- .lvivt
- .lvl
- .m
- .m2
- .m2ts
- .m3u
- .m3u8
- .m4a
- .m4p
- .m4u
- .m4v
- .mag
- .man
- .map
- .mapimail
- .max
- .mbox
- .mbx
- .mcd
- .mcgame
- .mcmeta
- .mcrp
- .md
- .md0
- .md1
- .md2
- .md3
- .md5
- .mdb
- .mdbackup
- .mdc
- .mddata
- .mdf
- .mdl
- .mdn
- .mds
- .mef
- .menu
- .meo
- .mfd
- .mfw
- .mic
- .mid
- .mim
- .mime
- .mip
- .mjd
- .mkv
- .mlb
- .mlx
- .mm6
- .mm7
- .mm8
- .mme
- .mml
- .mmw
- .mny
- .mobi
- .mod
- .moneywell
- .mos
- .mov
- .movie
- .moz
- .mp1
- .mp2
- .mp3
- .mp4
- .mp4v
- .mpa
- .mpe
- .mpeg
- .mpg
- .mpq
- .mpqge
- .mpv2
- .mrw
- .mrwref
- .ms11
- .ms11(Securitycopy)
- .mse
- .msg
- .msi
- .msp
- .mts
- .mui
- .mxp
- .myd
- .myi
- .nav
- .ncd
- .ncf
- .nd
- .ndd
- .ndf
- .nds
- .nef
- .nfo
- .nk2
- .nop
- .note
- .now
- .nrg
- .nri
- .nrw
- .ns2
- .ns3
- .ns4
- .nsd
- .nsf
- .nsg
- .nsh
- .ntl
- .number
- .nvram
- .nwb
- .nx1
- .nx2
- .nxl
- .nyf
- .oab
- .obj
- .odb
- .odc
- .odf
- .odg
- .odi
- .odm
- .odp
- .ods
- .odt
- .oft
- .oga
- .ogg
- .oil
- .opd
- .opf
- .orf
- .ost
- .otg
- .oth
- .otp
- .ots
- .ott
- .owl
- .oxt
- .p12
- .p7b
- .p7c
- .pab
- .pack
- .pages
- .pak
- .paq
- .pas
- .pat
- .pbf
- .pbk
- .pbp
- .pbs
- .pcd
- .pct
- .pcv
- .pdb
- .pdc
- .pdd
- .pef
- .pem
- .pfx
- .php
- .pif
- .pkb
- .pkey
- .pkh
- .pkpass
- .pl
- .plb
- .plc
- .pli
- .plugin
- .plus_muhd
- .pm
- .pmd
- .png
- .po
- .pot
- .potm
- .potx
- .ppam
- .ppd
- .ppf
- .ppj
- .pps
- .ppsm
- .ppsx
- .ppt
- .pptm
- .pptx
- .prc
- .prel
- .prf
- .priv
- .privat
- .props
- .prproj
- .prt
- .ps
- .psa
- .psafe3
- .psd
- .psk
- .pspimage
- .pst
- .psw6
- .ptx
- .pub
- .puz
- .pwf
- .pwi
- .pwm
- .pxp
- .py
- .qba
- .qbb
- .qbm
- .qbr
- .qbw
- .qbx
- .qby
- .qcow
- .qcow2
- .qdf
- .qed
- .qel
- .qic
- .qif
- .qpx
- .qt
- .qtq
- .qtr
- .r00
- .r01
- .r02
- .r03
- .r3d
- .ra
- .ra2
- .raf
- .ram
- .rar
- .rat
- .raw
- .rb
- .rdb
- .rdi
- .re4
- .res
- .result
- .rev
- .rgn
- .rgss3a
- .rim
- .rll
- .rm
- .rng
- .rofl
- .rpf
- .rrt
- .rsdf
- .rsrc
- .rss
- .rsw
- .rte
- .rtf
- .rts
- .rtx
- .rum
- .run
- .rv
- .rvt
- .rw2
- .rwl
- .rwz
- .rzk
- .rzx
- .s3db
- .sad
- .saf
- .safe
- .sas7bdat
- .sav
- .save
- .say
- .sb
- .sc2save
- .sch
- .scm
- .scn
- .scx
- .sd0
- .sd1
- .sda
- .sdb
- .sdc
- .sdf
- .sdn
- .sdo
- .sds
- .sdt
- .search-ms
- .sef
- .sen
- .ses
- .sfs
- .sfx
- .sgz
- .sh
- .shar
- .shr
- .shw
- .shy
- .sid
- .sidd
- .sidn
- .sie
- .sis
- .sitx
- .sldm
- .sldx
- .slk
- .slm
- .sln
- .slt
- .sme
- .snk
- .snp
- .snx
- .so
- .spd
- .spr
- .sql
- .sqlite
- .sqlite3
- .sqlitedb
- .sqllite
- .sqx
- .sr2
- .srf
- .srt
- .srw
- .ssa
- .st4
- .st5
- .st6
- .st7
- .st8
- .stc
- .std
- .sti
- .stm
- .stt
- .stw
- .stx
- .sud
- .suf
- .sum
- .svg
- .svi
- .svr
- .swd
- .swf
- .switch
- .sxc
- .sxd
- .sxg
- .sxi
- .sxm
- .sxw
- .syncdb
- .t01
- .t03
- .t05
- .t12
- .t13
- .tar
- .tarbz2
- .tax
- .tax2013
- .tax2014
- .tbk
- .tbz2
- .tch
- .tcx
- .teslacrypt
- .tex
- .text
- .tg
- .tga
- .tgz
- .thm
- .thmx
- .tif
- .tiff
- .tlb
- .tlg
- .tlz
- .tmp
- .toast
- .tor
- .torrent
- .tpu
- .tpx
- .trp
- .ts
- .tu
- .tur
- .txd
- .txf
- .txt
- .uax
- .udf
- .uea
- .umx
- .unity3d
- .unr
- .unx
- .uop
- .uot
- .upk
- .upoi
- .url
- .usa
- .usx
- .ut2
- .ut3
- .utc
- .utx
- .uu
- .uud
- .uue
- .uvx
- .uxx
- .val
- .vault
- .vb
- .vbox
- .vbs
- .vc
- .vcd
- .vcf
- .vcxpro
- .vdf
- .vdi
- .vdo
- .ver
- .vfs0
- .vhd
- .vhdx
- .vlc
- .vlt
- .vmdk
- .vmf
- .vmsd
- .vmt
- .vmx
- .vmxf
- .vob
- .vp
- .vpk
- .vpp_pc
- .vsi
- .vtf
- .w3g
- .w3x
- .wab
- .wad
- .wallet
- .walletdat
- .war
- .wav
- .wave
- .waw
- .wb2
- .wbk
- .wdgt
- .wks
- .wm
- .wma
- .wmd
- .wmdb
- .wmmp
- .wmo
- .wmv
- .wmx
- .wotreplay
- .wow
- .wpd
- .wpe
- .wpk
- .wpl
- .wps
- .wsf
- .wsh
- .wtd
- .wtf
- .wvx
- .x11
- .x3f
- .xcodeproj
- .xf
- .xhtml
- .xis
- .xl
- .xla
- .xlam
- .xlc
- .xlk
- .xll
- .xlm
- .xlr
- .xls
- .xlsb
- .xlsm
- .xlsx
- .xlt
- .xltm
- .xltx
- .xlv
- .xlw
- .xlwx
- .xml
- .xpi
- .xps
- .xpt
- .xqx
- .xsl
- .xtbl
- .xvid
- .xwd
- .xxe
- .xxx
- .yab
- .ycbcra
- .yenc
- .yml
- .ync
- .yps
- .yuv
- .z02
- .z04
- .zap
- .zip
- .zipx
- .zoo
- .zps
- .ztmp
It renames encrypted files using the following names:
- {Random Characters}
It drops the following file(s) as ransom note:
- {Encrypted Folder}HOW TO RESTORE YOUR DATA.hta -
SOLUTION
9.850
13.808.04
23 Nov 2017
13.809.00
24 Nov 2017
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
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
- Adobe = {Malware Path}\{Malware Name}.exe
- Adobe = {Malware Path}\{Malware Name}.exe
Step 4
Search and delete these files
- {Encrypted Folder}HOW TO RESTORE YOUR DATA.hta
Step 5
Scan your computer with your Trend Micro product to delete files detected as RANSOM_EXMAS.M. 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 6
Restore encrypted files from backup.
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