Analysis by: Johnlery Triunfante

ALIASES:

Trojan-Ransom.MSIL.Agent.gow (Kaspersky); Troj/Spider-J (Sophos); Ransom:Win32/SpiderFCryp (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 may arrive bundled with malware packages as a malware component. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It is capable of encrypting files in the affected system.

It encrypts files with specific file extensions.

  TECHNICAL DETAILS

File Size: 29,184 bytes
Memory Resident: No
Initial Samples Received Date: 10 Dec 2017
Payload: Drops files, Encrypts files

Arrival Details

This Ransomware may arrive bundled with malware packages as a malware component.

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

Dropping Routine

This Ransomware drops the following files:

  • {path of encrypted file}\HOW TO DECRYPT FILES.url
  • %Application Data%\Spider\id.txt
  • %Application Data%\Spider\5p1d3r
  • %Application Data%\Spider\files.txt ← Contains list of encrypted files

(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 does the following:

  • When HOW TO DECRYPT FILES.url is clicked, it will will connect to the following URL to play a video tutorial. However, as of this writing the said site is inaccessible.:
    • https://{BLOCKED}d.me/embedded/{BLOCKED}autoplay=1&stats=1

It is capable of encrypting files in the affected system.

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • raf
  • rar
  • ras
  • raw
  • rb
  • rctd
  • rcu
  • rdb
  • rdl
  • re4
  • readme
  • rft
  • rgb
  • rgf
  • rgss3a
  • rib
  • ric
  • riff
  • rim
  • ris
  • rix
  • rle
  • rli
  • rng
  • rofl
  • rpd
  • rpf
  • rpt
  • rri
  • rs
  • rsb
  • rsd
  • rsr
  • rst
  • rt
  • rtd
  • rtf
  • rtx
  • run
  • rw2
  • rwl
  • rzk
  • rzn
  • s2mv
  • s3m
  • saf
  • safetext
  • sai
  • sam
  • sav
  • save
  • sb
  • sbf
  • sc2save
  • scad
  • scc
  • sci
  • scm
  • scriv
  • scrivx
  • sct
  • scv
  • scw
  • sdb
  • 001
  • 036
  • 0411
  • 1cd
  • 1st
  • 2bp
  • 3dm
  • 3ds
  • 3fr
  • 3g2
  • 3gp
  • 4db
  • 4dl
  • 4mp
  • 73i
  • 7z
  • 7zip
  • 8xi
  • 9png
  • DayZProfile
  • a3d
  • aaf
  • abm
  • abs
  • abw
  • accdb
  • accdc
  • accde
  • accdr
  • accdt
  • accdw
  • accft
  • act
  • adn
  • adp
  • aep
  • aepx
  • aet
  • af2
  • af3
  • aft
  • afx
  • agif
  • agp
  • ahd
  • ai
  • aic
  • aif
  • aim
  • albm
  • alf
  • ani
  • ans
  • apd
  • apk
  • apm
  • apng
  • aps
  • apt
  • apx
  • arch00
  • art
  • artwork
  • arw
  • as
  • as3
  • asc
  • ascii
  • ase
  • asf
  • ask
  • asp
  • asset
  • asw
  • asx
  • asy
  • aty
  • avatar
  • awdb
  • awp
  • awt
  • aww
  • azz
  • backup
  • bad
  • bak
  • bar
  • bat
  • bay
  • bbs
  • bc6
  • bc7
  • bdb
  • bdp
  • bdr
  • bean
  • bib
  • big
  • bik
  • bkf
  • bkp
  • blend
  • blkrt
  • blob
  • bm2
  • bmp
  • bmx
  • bmz
  • bna
  • bnd
  • boc
  • bok
  • brk
  • brn
  • brt
  • bsa
  • bss
  • btd
  • bti
  • btr
  • byu
  • bzabw
  • c
  • c4
  • c4d
  • cal
  • cals
  • can
  • cas
  • cd5
  • cdb
  • cdc
  • cdg
  • cdmm
  • cdmt
  • cdmtz
  • cdmz
  • cdr
  • cdr3
  • cdr4
  • cdr6
  • cdrw
  • cdt
  • cer
  • cf
  • cfr
  • cfu
  • cgm
  • chart
  • chord
  • cimg
  • cin
  • cit
  • ckp
  • class
  • clkw
  • cma
  • cmx
  • cnm
  • cnv
  • colz
  • conf
  • contact
  • cpc
  • cpd
  • cpg
  • cpp
  • cps
  • cpt
  • cpx
  • cr2
  • crd
  • crt
  • crw
  • crwl
  • cs
  • css
  • csv
  • csy
  • ct
  • cv5
  • cvg
  • cvi
  • cvs
  • cvx
  • cwt
  • cxf
  • cyi
  • d3dbsp
  • daconnections
  • dacpac
  • dad
  • dadiagrams
  • daf
  • das
  • daschema
  • dat
  • dazip
  • db
  • db-shm
  • db-wal
  • db0
  • db2
  • db3
  • dbc
  • dbf
  • dbfv
  • dbk
  • dbs
  • dbt
  • dbv
  • dbx
  • dc2
  • dca
  • dcb
  • dcr
  • dcs
  • dct
  • dcx
  • ddl
  • ddoc
  • dds
  • ded
  • der
  • desc
  • design
  • df1
  • dgn
  • dgs
  • dgt
  • dhs
  • dib
  • dicom
  • diz
  • djv
  • djvu
  • dm3
  • dmi
  • dmo
  • dmp
  • dnc
  • dne
  • dng
  • doc
  • docb
  • docm
  • docx
  • docxml
  • docz
  • dot
  • dotm
  • dotx
  • dp1
  • dpp
  • dpx
  • dqy
  • drw
  • drz
  • dsk
  • dsn
  • dsv
  • dt
  • dt2
  • dta
  • dtsx
  • dtw
  • dvi
  • dvl
  • dwg
  • dx
  • dxb
  • dxf
  • dxg
  • dxl
  • eco
  • ecw
  • ecx
  • edb
  • efd
  • efx
  • egc
  • eio
  • eip
  • eit
  • email
  • emd
  • emf
  • emlx
  • ep
  • epf
  • epk
  • epp
  • eps
  • epsf
  • eql
  • erf
  • err
  • esm
  • etf
  • etx
  • euc
  • exr
  • fadein
  • fal
  • faq
  • fax
  • fb2
  • fb3
  • fbl
  • fbx
  • fcd
  • fcf
  • fdb
  • fdf
  • fdr
  • fds
  • fdt
  • fdx
  • fdxt
  • fes
  • ff
  • fft
  • fh10
  • fh11
  • fh3
  • fh4
  • fh5
  • fh6
  • fh7
  • fh8
  • fic
  • fid
  • fif
  • fig
  • fil
  • fla
  • flc
  • fli
  • flr
  • fm5
  • fmp
  • fmp12
  • fmpsl
  • fmv
  • fodt
  • fol
  • forge
  • fos
  • fountain
  • fp3
  • fp4
  • fp5
  • fp7
  • fpk
  • fpos
  • fpt
  • fpx
  • frt
  • fsh
  • ft10
  • ft11
  • ft7
  • ft8
  • ft9
  • ftn
  • fwdn
  • fxc
  • fxg
  • fzb
  • fzv
  • g3
  • gcdp
  • gdb
  • gdoc
  • gdraw
  • gem
  • geo
  • gfb
  • gfie
  • ggr
  • gho
  • gif
  • gih
  • gim
  • gio
  • glox
  • gmbck
  • gmspr
  • gpd
  • gpn
  • gro
  • grob
  • grs
  • gsd
  • gthr
  • gtp
  • gv
  • gwi
  • h
  • hbk
  • hdb
  • hdp
  • hdr
  • hht
  • his
  • hkdb
  • hkx
  • hpg
  • hpgl
  • hpi
  • hpl
  • hplg
  • hs
  • htc
  • html
  • hvpl
  • hwp
  • hz
  • i3d
  • ib
  • ibank
  • icn
  • icon
  • icpr
  • icxs
  • idc
  • idea
  • idml
  • idx
  • iff
  • igt
  • igx
  • ihx
  • iil
  • iiq
  • imd
  • indb
  • indd
  • indl
  • indt
  • info
  • ink
  • int
  • inx
  • ipf
  • ipx
  • itc2
  • itdb
  • itl
  • itm
  • itw
  • iwd
  • iwi
  • j
  • j2c
  • j2k
  • jar
  • jarvis
  • jas
  • java
  • jb2
  • jbig
  • jbig2
  • jbmp
  • jbr
  • jfif
  • jia
  • jis
  • jng
  • joe
  • jp1
  • jp2
  • jpe
  • jpeg
  • jpg
  • jpg2
  • jps
  • jpx
  • jrtf
  • js
  • jtf
  • jtx
  • jwl
  • jxr
  • kdb
  • kdbx
  • kdc
  • kdi
  • kdk
  • kes
  • kf
  • kic
  • klg
  • knt
  • kon
  • kpg
  • kwd
  • latex
  • layout
  • lbf
  • lbm
  • lbt
  • lgc
  • lis
  • lit
  • litemod
  • ljp
  • lmk
  • lnk
  • lnt
  • lp2
  • lrc
  • lrf
  • lst
  • ltr
  • ltx
  • lue
  • luf
  • lvl
  • lwo
  • lwp
  • lws
  • lxfml
  • lyt
  • lyx
  • m2
  • m3d
  • m3u
  • m3u8
  • m4a
  • m4u
  • ma
  • mac
  • man
  • map
  • maq
  • mat
  • max
  • mb
  • mbm
  • mbox
  • mcgame
  • mcmeta
  • md5txt
  • mdb
  • mdbackup
  • mdbhtml
  • mddata
  • mdf
  • mdn
  • mdt
  • me
  • mef
  • mell
  • menu
  • mft
  • mgcb
  • mgmf
  • mgmt
  • mgmx
  • mgtx
  • mid
  • min
  • mkv
  • mlx
  • mmat
  • mng
  • mnr
  • mnt
  • mobi
  • mos
  • movie
  • mp4
  • mpa
  • mpf
  • mpo
  • mpqge
  • mrg
  • mrwref
  • mrxs
  • msg
  • mt9
  • mud
  • mwb
  • mwp
  • mxl
  • myd
  • myl
  • ncf
  • ncr
  • nct
  • ndf
  • nfo
  • njx
  • nlm
  • notes
  • now
  • nrw
  • ns2
  • ns3
  • ns4
  • nsf
  • ntl
  • nv2
  • nwctxt
  • nyf
  • nzb
  • obj
  • oc3
  • oc4
  • oc5
  • oce
  • oci
  • ocr
  • odb
  • odc
  • odm
  • odo
  • odp
  • ods
  • odt
  • ofl
  • oft
  • omf
  • openbsd
  • oplc
  • oqy
  • ora
  • orf
  • ort
  • orx
  • ota
  • otg
  • oti
  • ott
  • ovp
  • ovr
  • owc
  • owg
  • oyx
  • ozb
  • ozj
  • ozt
  • p12
  • p7b
  • p7c
  • p7s
  • p96
  • p97
  • pages
  • pak
  • pal
  • pan
  • pano
  • pap
  • pbd
  • pbl
  • pbm
  • pc1
  • pc2
  • pc3
  • pcd
  • pcs
  • pcx
  • pdb
  • pdd
  • pdf
  • pdm
  • pdn
  • pe4
  • pef
  • pem
  • pfd
  • pff
  • pfi
  • pfs
  • pfv
  • pfx
  • pgf
  • pgm
  • phm
  • php
  • pi1
  • pi2
  • pi3
  • pic
  • pict
  • pix
  • pjpeg
  • pjpg
  • pjt
  • pkpass
  • pl
  • plantuml
  • plb
  • plt
  • pm
  • pmd
  • pmg
  • png
  • pni
  • pnm
  • pntg
  • pnz
  • pobj
  • pop
  • pot
  • potm
  • potx
  • pp4
  • pp5
  • ppam
  • ppj
  • ppm
  • pps
  • ppsm
  • ppsx
  • ppt
  • pptm
  • pptx
  • prel
  • prproj
  • prt
  • prw
  • ps
  • ps1
  • psd
  • psdx
  • pse
  • psid
  • psk
  • psp
  • pspbrush
  • pst
  • psw
  • ptg
  • pth
  • ptx
  • pu
  • pvj
  • pvm
  • pvr
  • pwa
  • pwi
  • pwr
  • px
  • pxr
  • py
  • pz3
  • pza
  • pzp
  • pzs
  • qdf
  • qdl
  • qic
  • qmg
  • qpx
  • qry
  • qvd
  • r3d
  • ra
  • rad
  • sdf
  • sdm
  • sdoc
  • sdw
  • sep
  • ses
  • sfc
  • sfera
  • sfw
  • sgm
  • sid
  • sidd
  • sidn
  • sie
  • sig
  • sis
  • sk1
  • sk2
  • skcard
  • skm
  • sla
  • slagz
  • sld
  • sldasm
  • slddrt
  • sldm
  • sldprt
  • sldx
  • slm
  • sls
  • smf
  • smil
  • sms
  • snagitstamps
  • snagstyles
  • snx
  • sob
  • spa
  • spe
  • sph
  • spj
  • spp
  • spq
  • spr
  • sqb
  • sql
  • sqlite
  • sqlite3
  • sqlitedb
  • sr2
  • srf
  • srw
  • ssa
  • ssfn
  • ssk
  • st
  • ste
  • stm
  • stn
  • stp
  • str
  • strings
  • stw
  • sty
  • sub
  • sum
  • sumo
  • sva
  • svf
  • svg
  • svgz
  • swf
  • sxd
  • sxg
  • sxw
  • syncdb
  • t12
  • t13
  • t2b
  • tab
  • tax
  • tb0
  • tbn
  • tcx
  • tdf
  • tdt
  • te
  • teacher
  • tex
  • text
  • tfc
  • tg4
  • tga
  • thm
  • thp
  • thumb
  • tif
  • tiff
  • tjp
  • tlb
  • tlc
  • tm
  • tm2
  • tmd
  • tmv
  • tmx
  • tn
  • tne
  • tor
  • tpc
  • tpi
  • trelby
  • trm
  • tvj
  • txt
  • u3d
  • u3i
  • udb
  • ufo
  • ufr
  • uga
  • unauth
  • unity
  • unity3d
  • unx
  • uof
  • uot
  • upd
  • upk
  • url
  • usertile-ms
  • usr
  • utf8
  • utxt
  • v12
  • vault
  • vbox
  • vbr
  • vcf
  • vct
  • vda
  • vdb
  • vdf
  • vdi
  • vec
  • vff
  • vfs0
  • vml
  • vnt
  • vob
  • vpd
  • vpe
  • vpk
  • vpp_pc
  • vrml
  • vrp
  • vsd
  • vsdm
  • vsdx
  • vsm
  • vst
  • vstm
  • vstx
  • vtf
  • vue
  • vw
  • w3x
  • wb1
  • wb2
  • wbc
  • wbd
  • wbk
  • wbm
  • wbmp
  • wbz
  • wcf
  • wdb
  • wdp
  • webdoc
  • webm
  • webp
  • wgz
  • wire
  • wmdb
  • wmf
  • wmo
  • wmv
  • wn
  • wotreplay
  • wp
  • wp4
  • wp5
  • wp6
  • wp7
  • wpa
  • wpb
  • wpd
  • wpe
  • wpg
  • wpl
  • wps
  • wpt
  • wpw
  • wri
  • wsc
  • wsd
  • wsh
  • wtx
  • wvl
  • x
  • x3d
  • x3f
  • xar
  • xbdoc
  • xbplate
  • xdb
  • xdl
  • xf
  • xhtm
  • xla
  • xlam
  • xld
  • xlf
  • xlgc
  • xlk
  • xll
  • xlm
  • xls
  • xlsb
  • xlsm
  • xlsx
  • xlt
  • xltm
  • xltx
  • xlw
  • xmind
  • xml
  • xmmap
  • xpm
  • xps
  • xqx
  • xwp
  • xxx
  • xy3
  • xyp
  • xyw
  • y
  • yal
  • ybk
  • yml
  • ysp
  • z3d
  • zabw
  • zdb
  • zdc
  • zif
  • zip
  • ztmp
  • zw

It avoids encrypting files found in the following folders:

  • tmp
  • Videos
  • winnt
  • Application Data
  • Spider
  • PrefLogs
  • Program Files (x86)
  • Program Files
  • ProgramData
  • Temp
  • Recycle
  • System Volume Information
  • Boot
  • Windows

It appends the following extension to the file name of the encrypted files:

  • .spider

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.836.04
FIRST VSAPI PATTERN DATE: 11 Dec 2017
VSAPI OPR PATTERN File: 13.837.00
VSAPI OPR PATTERN Date: 12 Dec 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

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Application Data%\Spider

Step 4

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • {path of encrypted file}\HOW TO DECRYPT FILES.url

Step 5

Scan your computer with your Trend Micro product to delete files detected as RANSOM_FILESPIDER.A. 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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