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We're gradually updating threat actor names in our reports to align with the new weather-themed taxonomy. Learn about Microsoft threat actor names
Ransom:Win32/WinPlock.B
Aliases: No associated aliases
Summary
Windows Defender AV detects and removes this threat.
This ransomware can stop you from using your PC or accessing your data. It might ask you to pay money to a malicious hacker.
We've seen this ransomware being downloaded by a trojan detected as TrojanDownloader:JS/Crimace.A, which is being distributed via email messages that pretend to be fax.
Read more in this blog: Fake fax ushers in revival of a ransomware family.
Our ransomware FAQ page has more information on this type of threat.
The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.
Read our latest report: A worthy upgrade: Next-gen security on Windows 10 proves resilient against ransomware outbreaks in 2017.
If you've already paid, see our ransomware page for help on what to do now.
Run antivirus or antimalware software
Use the following free Microsoft software to detect and remove this threat:
- Windows Defender for Windows 8.1 and Windows 10, or Microsoft Security Essentials for Windows 7 and Windows Vista
- Microsoft Safety Scanner
You should also run a full scan. A full scan might find hidden malware.
Advanced troubleshooting
To restore your PC, you might need to download and run Windows Defender Offline. See our advanced troubleshooting page for more help.
You can also ask for help from other PC users at the Microsoft virus and malware community.
If you’re using Windows XP, see our Windows XP end of support page.
Use cloud protection
Use cloud protection to help guard against the latest malware threats. It’s turned on by default for Microsoft Security Essentials and Windows Defender for Windows 10.
Go to All settings > Update & security > Windows Defender and make sure that your Cloud-based Protection settings is turned On.
Get more help
You can also see our advanced troubleshooting page for more help or search the Microsoft virus and malware community for more help.
If you’re using Windows XP, see our Windows XP end of support page.
Threat behavior
Arrival
This ransomware may be downloaded by TrojanDownloader:JS/Crimace.A.
Installation
This ransomware drops a copy itself:
- %APPDATA% \Microsoft\Crypto\32mem.exe
It also creates the following file, which lists the files it encrypts during its file encryption routine:
- %APPDATA% \Microsoft\Crypto\en_files.txt
It also adds the following files:
- %SystemRoot% \Your files are locked !!!!!.txt
- %SystemRoot% \Your files are locked !!!!.txt
- %SystemRoot% \Your files are locked !!!.txt
- %SystemRoot% \Your files are locked !!.txt
- %SystemRoot% \Your files are locked !.txt
It creates the following entry so that it runs every time you start your PC:
In subkey: HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Sets value: "<Random>"
With data: "%APPDATA%\Microsoft\Crypto\32mem.exe"
Payload
.$er |
.000 |
.001 |
.002 |
.113 |
.123c |
.123d |
.123dx |
.1ph |
.2d |
.2mg |
.360 |
.3d |
.3d2 |
.3d4 |
.3da |
.3dc |
.3df |
.3dl |
.3dm |
.3dmf |
.3dmk |
.3don |
.3dp |
.3dr |
.3ds |
.3dt |
.3dv |
.3dw |
.3dx |
.3dxml |
.3fr |
.3g2 |
.3ga |
.3gp |
.3gp2 |
.3gpp |
.3gpp2 |
.3mm |
.3p2 |
.4db |
.4dd |
.4dv |
.4mp |
.4th |
.4ui |
.60d |
.6cm |
.73b |
.787 |
.7z |
.7z.001 |
.7z.002 |
.8cm |
.8pbs |
.8svx |
.8xi |
.9.png |
._eml |
.a00 |
.a01 |
.a02 |
.a2c |
.a2m |
.a3w |
.a4m |
.a4p |
.a4w |
.a52 |
.a5rpt |
.a5w |
.a65 |
.aa |
.aa3 |
.aac |
.aam |
.aao |
.aax |
.ab3 |
.abcd |
.abdata |
.abf |
.abk |
.abm |
.abw |
.abx |
.aby |
.ac3 |
.ac5 |
.ac6 |
.accdb |
.accde |
.accdr |
.acd-zip |
.ace |
.acm |
.acp |
.acr |
.act |
.adc |
.adcp |
.ade |
.adf |
.adp |
.adts |
.adz |
.aep |
.aepx |
.aes |
.aet |
.aetx |
.af2 |
.af3 |
.afc |
.afd |
.aff |
.afp |
.afs |
.aft |
.afx |
.agd |
.aggr |
.agi |
.agp |
.ai |
.aic |
.aif |
.aifb |
.aifc |
.aiff |
.aim |
.aimppl |
.ain |
.ais |
.aiv |
.ajp |
.akp |
.al |
.alac |
.alaw |
.albm |
.all |
.alp |
.als |
.alz |
.am4 |
.am5 |
.am6 |
.am7 |
.amc |
.amf |
.amr |
.ams |
.amu |
.amv |
.amx |
.amz |
.an |
.an8 |
.anh |
.anim |
.anm |
.anme |
.ans |
.aob |
.aof |
.ap |
.apd |
.ape |
.aph |
.apm |
.apng |
.aps |
.apt |
.apx |
.apz |
.arc |
.ard |
.arff |
.arh |
.ari |
.aria |
.ariax |
.arj |
.ark |
.aro |
.arr |
.arsc |
.art |
.artproj |
.artwork |
.arw |
.as |
.as2proj |
.as3proj |
.as4 |
.asat |
.asc |
.ascii |
.ascs |
.asd |
.ase |
.ashprj |
.ashx |
.asm |
.asnd |
.asp |
.aspx |
.asw |
.at3 |
.ate |
.ati |
.atl |
.atm |
.atr |
.atrac |
.au |
.au3 |
.aud |
.aup |
.aut |
.ava |
.avchd |
.avhd |
.avi |
.avp |
.awb |
.awd |
.awdb |
.awm |
.aww |
.axx |
.ay |
.azf |
.azs |
.azw |
.azw1 |
.azw3 |
.azw4 |
.azz |
.b1 |
.b2a |
.b3d |
.b4s |
.b5i |
.b64 |
.b6i |
.ba |
.bac |
.bak |
.bak2 |
.bak3 |
.bakx |
.bak~ |
.band |
.bap |
.bas |
.bay |
.bb |
.bbc |
.bbcd |
.bcf |
.bci |
.bck |
.bcl |
.bcm |
.bdb |
.bdf |
.bean |
.bet |
.bfa |
.bfc |
.bfx |
.bgt |
.bh |
.bho |
.bhx |
.bib |
.bidule |
.bik |
.bim |
.bix |
.bk1 |
.bkc |
.bkf |
.bkk |
.bkp |
.bks |
.bld |
.blend |
.blend1 |
.blend2 |
.blkrt |
.bluej |
.blz |
.bm2 |
.bmc |
.bmf |
.bmz |
.bna |
.bnp |
.boc |
.bok |
.bonk |
.boo |
.book |
.box |
.bp3 |
.bpa |
.bpb |
.bpd |
.bpdx |
.bpf |
.bpg |
.bpk |
.bpm |
.bpn |
.bpnueb |
.bpr |
.bps |
.bpw |
.br3 |
.br4 |
.br5 |
.br6 |
.br7 |
.brain |
.brd |
.brf |
.brk |
.brl |
.brn |
.bro |
.brw |
.bs2 |
.bs4 |
.bsd |
.bsdl |
.bsf |
.bsk |
.btd |
.btf |
.btif |
.btoa |
.bup |
.bur |
.bvd |
.bvp |
.bwf |
.bwg |
.bwi |
.bws |
.bwt |
.bww |
.bz |
.bz2 |
.bza |
.bzabw |
.bzip |
.bzip2 |
.c |
.c00 |
.c01 |
.c02 |
.c10 |
.c2d |
.c3d |
.c3z |
.c4 |
.c4d |
.caf |
.caff |
.cal |
.cals |
.cam |
.camm |
.camproj |
.camrec |
.camv |
.can |
.cap |
.caproj |
.capx |
.car |
.cawr |
.cbl |
.cbp |
.cbr |
.cbu |
.cbz |
.cc |
.cca |
.ccb |
.ccd |
.ccf |
.cch |
.ccr |
.ccs |
.cct |
.cd |
.cd2 |
.cd5 |
.cdb |
.cdd |
.cdda |
.cddx |
.cdf |
.cdg |
.cdi |
.cdm |
.cdmm |
.cdmt |
.cdmtz |
.cdmz |
.cdo |
.cdpx |
.cdpz |
.cdr |
.cdt |
.cdw |
.cdz |
.ce |
.ceb |
.cedprj |
.cef |
.cel |
.celtx |
.cf2 |
.cfa |
.cff |
.cfs |
.cg |
.cg3 |
.cga |
.cgm |
.cgp |
.ch3 |
.chef |
.chg |
.chml |
.chn |
.cib |
.cif |
.cil |
.cimg |
.cin |
.cit |
.ck9 |
.ckd |
.ckf |
.ckp |
.ckt |
.cl2 |
.cl2arc |
.cl2doc |
.cl2lyt |
.cl2tpl |
.cl4 |
.cl5 |
.class |
.clb |
.clg |
.clk |
.cls |
.clx |
.cm10 |
.cmap |
.cmbl |
.cmf |
.cmmp |
.cmod |
.cmx |
.cmz |
.cna |
.cnd |
.cng |
.cnm |
.cnv |
.cob |
.colz |
.cov |
.cp9 |
.cpb |
.cpc |
.cpd |
.cpe |
.cpf |
.cpg |
.cph |
.cpio |
.cpk |
.cpmz |
.cpp |
.cpr |
.cps |
.cpt |
.cptx |
.cpx |
.cpy |
.cr2 |
.crd |
.crds |
.crev |
.crt |
.crtr |
.crtx |
.crw |
.crypted |
.cryptra |
.crz |
.cs |
.csa |
.csd |
.csf |
.csh |
.csi |
.cso |
.csp |
.csproj |
.csr |
.csx |
.ct |
.ctm |
.cts |
.ctv |
.ctv3 |
.cu |
.cub |
.cut |
.cv5 |
.cvc |
.cvg |
.cvi |
.cvs |
.cvw |
.cvx |
.cwb |
.cwk |
.cwp |
.cwt |
.cwz |
.cx3 |
.cxd |
.cxf |
.cxp |
.cxt |
.cxx |
.cyp |
.cys |
.czd |
.czi |
.czip |
.czp |
.d00 |
.d01 |
.d2v |
.d3d |
.d3v |
.d64 |
.da2 |
.daa |
.daf |
.dal |
.dam |
.dao |
.dash |
.dav |
.dax |
.daz |
.db |
.db1 |
.db3 |
.dba |
.dbc |
.dbd |
.dbf |
.dbk |
.dbo |
.dbpro |
.dbproj |
.dbr |
.dbs |
.dbt |
.dbv |
.dbx |
.dc |
.dc2 |
.dc3 |
.dc4 |
.dca |
.dcb |
.dcd |
.dce |
.dcf |
.dcm |
.dco |
.dcpf |
.dct |
.dcx |
.dd |
.ddl |
.ddrw |
.dds |
.ddt |
.ded |
.deproj |
.des |
.design |
.det |
.dev |
.dex |
.df1 |
.df2 |
.dfc |
.dff |
.dfg |
.dfk |
.dfproj |
.dfs |
.dft |
.dfx |
.dgb |
.dgc |
.dgk |
.dgn |
.dgs |
.dib |
.dicom |
.dif |
.dig |
.dim |
.dime |
.dis |
.divx |
.djr |
.djv |
.djvu |
.dke |
.dls |
.dlv |
.dlx |
.dm |
.dm3 |
.dmb |
.dmf |
.dmo |
.dmr |
.dms |
.dmsat |
.dmsd |
.dmsd3d |
.dmse |
.dmsm |
.dmsm3d |
.dmsp |
.dmss |
.dmx |
.dna |
.dnc |
.dne |
.dng |
.dnl |
.dob |
.doc |
.docm |
.docx |
.docxml |
.docz |
.dot |
.dotm |
.dotx |
.dov |
.dp1 |
.dpb |
.dpd |
.dpp |
.dpr |
.dproj |
.dra |
.drf |
.drg |
.drmx |
.drw |
.drz |
.ds2 |
.dsa |
.dsd |
.dse |
.dsf |
.dsg |
.dsgm |
.dsi |
.dsk |
.dsm |
.dso |
.dsp |
.dss |
.dsx |
.dsy |
.dta |
.dtp |
.dtr |
.dts |
.dtshd |
.dtx |
.dv |
.dv-avi |
.dv4 |
.dvdproj |
.dvds |
.dvf |
.dvg |
.dvo |
.dvr |
.dvr-ms |
.dvx |
.dw |
.dwa |
.dwd |
.dwf |
.dwfx |
.dwg |
.dwp |
.dwz |
.dx |
.dxb |
.dxf |
.dxg |
.dxr |
.dz |
.e01 |
.e4a |
.e57 |
.eap |
.ear |
.ebk |
.ecm |
.ecp |
.ecs |
.eda |
.edat2 |
.edb |
.ede |
.edf |
.edfx |
.edg |
.edge |
.edk |
.edn |
.edq |
.edrwx |
.eds |
.edv |
.efa |
.efe |
.efk |
.efl |
.efq |
.efr |
.efs |
.efu |
.efv |
.efx |
.egc |
.egg |
.egp |
.eio |
.eip |
.ekb |
.el |
|
.emc |
.eml |
.emlx |
.enc |
.enex |
.ep |
.epf |
.epi |
.epp |
.eps |
.epsf |
.epub |
.eql |
.er1 |
.erf |
.erl |
.es2 |
.esb |
.esf |
.eui |
.evo |
.evr |
.evy |
.ewb |
.ewd |
.ex |
.exb |
.exl |
.exm |
.exp |
.exr |
.exw |
.eye |
.ezp |
.f04 |
.f06 |
.f32 |
.f3d |
.f4a |
.f4p |
.f4v |
.f64 |
.f90 |
.fac |
.face |
.facefx |
.fasta |
.fax |
.fb2 |
.fbc |
.fbf |
.fbk |
.fbm |
.fbp |
.fbp7 |
.fbr |
.fbw |
.fbz |
.fbz7 |
.fcd |
.fcf |
.fcgi |
.fcstd |
.fcw |
.fdd |
.fdi |
.fdp |
.fdr |
.fds |
.fdx |
.fft |
.fg |
.fgl |
.fh10 |
.fh11 |
.fh3 |
.fh4 |
.fh5 |
.fh6 |
.fh7 |
.fh8 |
.fh9 |
.fhd |
.fhf |
.fif |
.fig |
.fimpp |
.fits |
.fla |
.flac |
.flame |
.flb |
.flka |
.flkb |
.flo |
.flow |
.flp |
.flr |
.flt |
.flv |
.flx |
.fm |
.fmpsl |
.fmv |
.fmz |
.fnbk |
.fnc |
.fodp |
.fods |
.fodt |
.fop |
.forth |
.fox |
.fp3 |
.fp8 |
.fpa |
.fpenc |
.fpf |
.fpj |
.fpos |
.fpp |
.fpx |
.frg |
.frj |
.frm |
.fro |
.frx |
.fry |
.fs |
.fsif |
.fsm |
.fsproj |
.fsq |
.fsx |
.ft10 |
.ft11 |
.ft7 |
.ft8 |
.ft9 |
.ftl |
.ftm |
.ftmb |
.ftn |
.ftw |
.fwdn |
.fx |
.fxa |
.fxcproj |
.fxl |
.fxm |
.fxml |
.fxs |
.fz |
.fza |
.fzf |
.fzp |
.fzz |
.g3 |
.g721 |
.g723 |
.g726 |
.gal |
.gan |
.gb1 |
.gb2 |
.gbap |
.gbas |
.gbi |
.gbk |
.gbs |
.gca |
.gcd |
.gcdp |
.gcw |
.gcx |
.gdf |
.gdrive |
.gds |
.ged |
.gem |
.gen |
.geo |
.gexf |
.gfar |
.gfb |
.gfe |
.gfp |
.gho |
.ghs |
.gi |
.gig |
.gih |
.gkh |
.gl |
.gla |
.glade |
.glb |
.gld |
.glox |
.gls |
.gm |
.gm6 |
.gm81 |
.gmd |
.gmk |
.gmspr |
.gmx |
.gmz |
.gno |
.gom |
.gp3 |
.gp5 |
.gpd |
.gpf |
.gpg |
.gpj |
.gpp |
.gpr |
.gra |
.grade |
.grasp |
.grf |
.grn |
.gro |
.grob |
.groove |
.groovy |
.grr |
.gry |
.gs3 |
.gsd |
.gsm |
.gsproj |
.gszip |
.gtar |
.gtp |
.gts |
.gvi |
.gvy |
.gwp |
.gxd |
.gxk |
.gz |
.gz2 |
.gza |
.gzip |
.h |
.h0 |
.h11 |
.h12 |
.h264 |
.ha |
.hal |
.haml |
.has |
.hbc |
.hbc2 |
.hbe |
.hbk |
.hbx |
.hcc |
.hce |
.hci |
.hcp |
.hcr |
.hcx |
.hdmov |
.hdp |
.hdr |
.hdv |
.hex |
.hf |
.hfs |
.hfv |
.hh |
.hip |
.hipnc |
.hki |
.hki1 |
.hki2 |
.hki3 |
.hkm |
.hlsl |
.hma |
.hmi |
.hmk |
.hmxp |
.hpd |
.hpi |
.hpk |
.hpl |
.hpp |
.hqx |
.hr |
.hrf |
.hrl |
.hs |
.hsf |
.html0 |
.htmlz |
.htxt |
.htz4 |
.htz5 |
.hwp |
.hxn |
.hxx |
.hyp |
.hz |
.i00 |
.i01 |
.i02 |
.iba |
.ibb |
.ibcd |
.ibq |
.ic1 |
.ic3 |
.ic3d |
.ica |
.icap |
.icb |
.ice |
.icml |
.icmt |
.icpr |
.ics |
.idap |
.idea |
.idml |
.idms |
.idpk |
.idw |
.if |
.ifc |
.ifczip |
.iff |
.iges |
.igs |
.igx |
.iiq |
.ilbm |
.ildoc |
.ima |
.imd |
.imf |
.img |
.imj |
.imz |
.incd |
.inct |
.incx |
.ind |
.indb |
.indd |
.inds |
.ink |
.inl |
.inm |
.ino |
.int |
.ipd |
.ipf |
.ipj |
.ipk |
.ipn |
.ipt |
.ipx |
.ircp |
.irf |
.irock |
.irp |
.irx |
.ish |
.ish2 |
.ish3 |
.isma |
.ismv |
.iso |
.isoz |
.isz |
.iv |
.iv2i |
.iva |
.ive |
.ivf |
.ivr |
.iw |
.iwxdata |
.iwz |
.ix2 |
.ixa |
.ixb |
.ize |
.izz |
.izzy |
.j |
.j2c |
.j2k |
.j3o |
.jac |
.jam |
.jar.pack |
.jas |
.jav |
.java |
.jb2 |
.jbc |
.jbig |
.jbig2 |
.jbk |
.jbmp |
.jclic |
.jcp |
.jed |
.jfif |
.jfsl |
.jic |
.jif |
.jiff |
.jis |
.jng |
.jo |
.jo-7z |
.job |
.joe |
.jp1 |
.jp2 |
.jpc |
.jpe |
.jpeg |
.jpf |
.jpg |
.jpg2 |
.jpr |
.jps |
.jpx |
.jrtf |
.jsd |
.jsda |
.jsfl |
.jt |
.jtf |
.jts |
.jtv |
.jtx |
.jude |
.jvsg |
.jwl |
.jxr |
.k25 |
.k26 |
.k3g |
.kar |
.kb2 |
.kdbx |
.kdc |
.kde |
.kdk |
.key |
.kfn |
.kfx |
.kgb |
.kic |
.kin |
.kit |
.kmv |
.kodak |
.koob |
.koz |
.kpf |
.kpg |
.kpp |
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|
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.opf |
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|
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.ync |
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.yz1 |
.z3d |
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.zabw |
.zap |
.zdp |
.zfx |
.zgm |
.zi |
.zif |
.zip |
.zipx |
.zix |
.zl |
.zm1 |
.zm2 |
.zm3 |
.zmv |
.zoo |
.zpi |
.zps |
.zvr |
.zw |
.zz |
|
|
Prevention
The following can indicate that you have this threat on your PC:
- You see this message:
- You see files similar to:
- %APPDATA% \Microsoft\Crypto\32mem.exe
- %APPDATA% \Microsoft\Crypto\en_files.txt
- %SystemRoot% \Your files are locked !!!!!.txt
- %SystemRoot% \Your files are locked !!!!.txt
- %SystemRoot% \Your files are locked !!!.txt
- %SystemRoot% \Your files are locked !!.txt
- %SystemRoot% \Your files are locked !.txt
- You see registry modifications such as:
In subkey: HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Sets value: "<Random>"
With data: "%APPDATA%\Microsoft\Crypto\32mem.exe"