Ransom.Win64.LOCKFILE.A
Trojan-Ransom.Lockfile (IKARUS)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
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 executes then deletes itself afterward.
It drops files as ransom note.
TECHNICAL DETAILS
273,920 bytes
EXE
No
Encrypts files, Deletes self after execution, Drops 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 executes then deletes itself afterward.
Process Termination
This Ransomware terminates the following processes if found running in the affected system's memory:
- Processes with the following strings in their names:
- vmwp
- virtualbox
- vbox
- sqlservr
- mysqld
- omtsreco
- oracle
- tnslsnr
- vmware
Other Details
This Ransomware does the following:
- It encrypts files in fixed drives.
Ransomware Routine
This Ransomware avoids encrypting files with the following strings in their file path:
- .lockfile
- \Windows
- LOCKFILE
- NTUSER
- a3l
- a3m
- a4l
- a4p
- a5l
- abk
- abs
- acc
- acp
- ada
- adb
- add
- adf
- adi
- adm
- ado
- adp
- adr
- ads
- adt
- adts
- af2
- afm
- aif
- aifc
- aiff
- aim
- ais
- akw
- alaw
- alb
- all
- ams
- anc
- ani
- ans
- api
- aps
- arc
- ari
- arj
- art
- asa
- asc
- asd
- ase
- asf
- aso
- asp
- ast
- asv
- asx
- atw
- avb
- avi
- avr
- avs
- awd
- awr
- axx
- bas
- bat
- bdf
- bgl
- bif
- biff
- bks
- bmi
- bmk
- bmp
- book
- box
- bpl
- bqy
- brx
- bs1
- bsc
- bsp
- btm
- bud
- bun
- bw
- bwv
- byu
- c0l
- cab
- cal
- cam
- cap
- cas
- cat
- cca
- ccb
- cch
- ccm
- cco
- cct
- cda
- cdf
- cdi
- cdm
- cdt
- cdx
- cel
- cfb
- cfg
- cfm
- cgi
- cgm
- chk
- chp
- chr
- cht
- cif
- cil
- cim
- cin
- ck1
- ck2
- ck3
- ck4
- ck5
- ck6
- class
- cll
- clp
- cls
- cmd
- cmf
- cmg
- cmp
- cmv
- cmx
- cnf
- cnm
- cnq
- cnt
- cob
- cpd
- cpi
- cpl
- cpo
- cpr
- cpx
- crd
- crp
- csc
- csp
- css
- ctl
- cue
- cur
- cut
- cwk
- cws
- cxt
- d64
- dbc
- dbx
- dc5
- dcm
- dcr
- dcs
- dct
- dcu
- dcx
- ddf
- ddif
- def
- defi
- dem
- der
- dewf
- dib
- dic
- dif
- dig
- dir
- diz
- dlg
- dll
- dls
- dmd
- dmf
- dpl
- dpr
- drv
- drw
- dsf
- dsg
- dsm
- dsp
- dsq
- dst
- dsw
- dta
- dtf
- dtm
- dun
- dwd
- dwg
- dxf
- dxr
- eda
- edd
- ede
- edk
- edq
- eds
- edv
- efa
- efe
- efk
- efq
- efs
- efv
- emd
- emf
- eml
- enc
- enff
- ephtml
- eps
- epsf
- epx
- eri
- err
- esps
- eui
- evy
- ewl
- exc
- exe
- f2r
- f3r
- f77
- f90
- far
- fav
- fax
- fbk
- fcd
- fdb
- fdf
- fft
- fif
- fig
- fits
- fla
- flc
- flf
- flt
- flv
- fmb
- fml
- fmt
- fnd
- fng
- fnk
- fog
- fon
- for
- fot
- fp1
- fp3
- fpt
- frt
- frx
- fsf
- fsl
- fsm
- ftg
- fts
- fw2
- fw3
- fw4
- fxp
- fzb
- fzf
- fzv
- gal
- gdb
- gdm
- gds
- ged
- gen
- getright
- gfc
- gfi
- gfx
- gho
- gid
- gif
- gim
- gix
- gkh
- gks
- gna
- gnt
- gnx
- gra
- grd
- grf
- grp
- gsm
- gt2
- gtk
- gwx
- gwz
- hcm
- hcom
- hcr
- hdf
- hed
- hel
- hex
- hgl
- hlp
- hog
- hpj
- hpp
- hqx
- hst
- htt
- htx
- hxm
- ica
- icb
- icc
- icl
- icm
- ico
- idb
- idd
- idf
- idq
- idx
- iff
- igf
- iif
- ima
- imz
- inc
- inf
- ini
- ins
- int
- ipdb
- iso
- isp
- ist
- isu
- its
- ivd
- ivp
- ivt
- ivx
- iwc
- j62
- java
- jbf
- jmp
- jn1
- jpeg
- jpg
- json
- jsonlz4
- jtf
- k25
- kar
- kdc
- key
- kfx
- kiz
- kkw
- kmp
- kqp
- kr1
- krz
- ksf
- lab
- ldb
- ldl
- leg
- les
- lft
- lgo
- lha
- lib
- lin
- lis
- llx
- lnk
- log
- lpd
- lrc
- lsl
- lsp
- lst
- lwlo
- lwob
- lwp
- lwsc
- lyr
- lzh
- lzs
- m1v
- m3d
- m3u
- m4a
- mac
- magic
- mak
- mam
- man
- map
- maq
- mar
- mas
- mat
- maud
- maz
- mb1
- mbox
- mbx
- mcc
- mcp
- mcr
- mcw
- mda
- mdb
- mde
- mdl
- mdn
- mdw
- mdz
- med
- mer
- met
- mfg
- mgf
- mic
- mid
- mif
- miff
- mim
- mli
- mmf
- mmg
- mmm
- mmp
- mn2
- mnd
- mng
- mnt
- mnu
- mod
- mov
- mp2
- mp3
- mp4
- mpa
- mpe
- mpeg
- mpp
- mpr
- mri
- msa
- msdl
- msg
- msi
- msn
- msp
- mst
- mtm
- mui
- mul
- mus
- mus10
- mvb
- nan
- nap
- ncb
- ncd
- ncf
- ndo
- nff
- nft
- nil
- nist
- nlb
- nlm
- nls
- nlu
- nod
- ns2
- nsf
- nso
- nst
- ntf
- ntx
- nupkg
- nwc
- nws
- o01
- obd
- obj
- obz
- ocx
- ods
- off
- ofn
- oft
- okt
- olb
- ole
- oogl
- opl
- opo
- opt
- opx
- or2
- or3
- ora
- orc
- org
- oss
- ost
- otl
- out
- p10
- p3
- p65
- p7c
- pab
- pac
- pak
- pal
- part
- pas
- pat
- pbd
- pbf
- pbk
- pbl
- pbm
- pbr
- pcd
- pce
- pch
- pcl
- pcm
- pcp
- pcs
- pct
- pcx
- pdb
- pdd
- pdp
- pdq
- pds
- pf
- pfa
- pfb
- pfc
- pfm
- pgd
- pgl
- pgm
- pgp
- php
- php
- pict
- pif
- pin
- pix
- pjx
- pkg
- pkr
- plg
- pli
- plm
- pls
- plt
- pm5
- pm6
- png
- pog
- pol
- pop
- pot
- pov
- pp4
- ppa
- ppf
- ppm
- ppp
- pqi
- prc
- pre
- prf
- prj
- prn
- prp
- prs
- prt
- prv
- psb
- psi
- psm
- psp
- ptd
- ptm
- pwl
- pwp
- pwz
- qad
- qbw
- qd3d
- qdt
- qfl
- qic
- qif
- qlb
- qry
- qst
- qti
- qtp
- qts
- qtx
- qxd
- ram
- ras
- rbh
- rcc
- rdf
- rdl
- rec
- reg
- rep
- res
- rft
- rgb
- rll
- rmd
- rmf
- rmi
- rom
- rov
- rpm
- rpt
- rrs
- rsl
- rsm
- rtk
- rtm
- rts
- rul
- rvp
- s3i
- s3m
- sam
- sav
- sbk
- sbl
- sc2
- sc3
- scc
- scd
- scf
- sci
- scn
- scp
- scr
- sct01
- scv
- sd2
- sdf
- sdk
- sdl
- sdr
- sds
- sdt
- sdv
- sdw
- sdx
- sea
- sep
- ses
- sf
- sf2
- sfd
- sfi
- sfr
- sfw
- shw
- sig
- sit
- siz
- ska
- skl
- slb
- sld
- slk
- sm3
- smp
- snd
- sndr
- sndt
- sou
- spd
- spl
- sqc
- sqr
- ssd
- ssf
- st
- stl
- stm
- str
- sty
- svx
- swa
- swf
- swp
- sys
- syw
- t2t
- t64
- taz
- tbk
- tcl
- tdb
- tex
- tga
- tgz
- tig
- tlb
- tle
- tlog
- tmp
- toc
- tol
- tos
- tpl
- tpp
- trk
- trm
- trn
- ttf
- tz
- uwf
- v8
- vap
- vbp
- vbw
- vbx
- vce
- vcf
- vct
- vda
- vi
- viff
- vir
- viv
- vqe
- vqf
- vrf
- vrml
- vsd
- vsix
- vsl
- vsn
- vst
- vsw
- vxd
- wcm
- wdb
- wdg
- web
- wfb
- wfd
- wfm
- wfn
- wmv
- xaml
- xml
- xml
It appends the following extension to the file name of the encrypted files:
- .lockfile
It drops the following file(s) as ransom note:
- {Encrypted directory}\LOCKFILE-README-{Hostname}-{Generated ID}.hta
SOLUTION
9.800
16.922.04
23 Aug 2021
16.923.00
24 Aug 2021
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
Step 2
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.
Step 3
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 4
Restart in Safe Mode
Step 5
Search and delete these files
- {Encrypted directory}\LOCKFILE-README-{Hostname}-{Generated ID}.hta
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Ransom.Win64.LOCKFILE.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 this Knowledge Base page for more information.
Step 7
Restore encrypted files from backup.
Step 8
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win64.LOCKFILE.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:
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