Ransomware Research

STOP Ransomware

STOP is a malicious ransomware strain that encrypts victim files and demands ransom payment for decryption. First observed in the wild on December 1, 2017, this ransomware has been actively targeting systems worldwide. Security researchers also track this malware under the aliases: STOP-Keypass, STOP-Djvu, Djvu.

Quick Facts

Ransomware Family
STOP
First Seen
December 1, 2017
Known Aliases
STOP-KeypassSTOP-DjvuDjvu

How STOP Ransomware Works

Targeted Files

https://www.bleepingcomputer.com/forums/t/671473/stop-ransomware-stop-puma-djvu-promo-drume-support-topic https://www.bleepingcomputer.com/forums/t/671473/stop-ransomware-stop-suspended-yourdatarestore-txt-support-topic

File Encryption Patterns

STOP modifies encrypted files using specific patterns to mark them as encrypted:

File extensions added after encryption:

..STOP..promorad..DATASTOP..STOPDATA..KEYPASS..WHY..SAVEfiles..DATAWAIT..INFOWAIT..puma..pumax..pumas..shadow..djvu..jzeq..jzie..djvuu..udjvu..uudjvu..codnat..djvuq..djvus..djvur..djvut..djvup..pdff..tro..tfude..tfudeq..tfudet..rumba..adobe..adobee..blower..promos..promoz..promok..promorad2..kroput..kroput1..charck..pulsar1..klope..kropun..charcl..kropun1..doples..luces..luceq..chech..proden..drume..tronas..grovas..trosak..grovat..roland..refols..raldug..etols..guvara..browec..norvas..moresa..verasto..hrosas..kiratos..todarius..hofos..roldat..dutan..sarut..fedasot..berost..forasom..fordan..bufas..dotmap..radman..ferosas..rectot..skymap..mogera..rezuc..stone..redmat..lanset..davda..poret..pidon..heroset..boston..myskle..muslat..gerosan..vesad..horon..neras..truke..dalle..lotep..nusar..litar..besub..cezor..gycc..gyew..gyza..lokas..godes..budak..vusad..herad..berosuce..gehad..gusau..madek..tocue..darus..lapoi..todar..dodoc..bopador..novasof..ntuseg..ndarod..access..format..nelasod..mogranos..cosakos..nvetud..lotej..kovasoh..prandel..zatrov..masok..brusaf..londec..krusop..mtogas..nasoh..coharos..nacro..pedro..nuksus..vesrato..cetori..masodas..stare..carote..shariz..gero..hese..xoza..seto..peta..moka..meds..kvag..domn..karl..nesa..boot..noos..kuub..reco..bora..leto..nols..werd..coot..derp..nakw..meka..toec..mosk..lokf..peet..grod..mbed..kodg..zobm..rote..msop..hets..righ..gesd..merl..mkos..nbes..piny..redl..kodc..nosu..repp..alka..bboo..rooe..mmnn..ooss..mool..nppp..rezm..lokd..jazi..jawr..foop..remk..npsk..opqz..mado..jope..mpaj..lalo..lezp..qewe..mpal..sqpc..mzlq..koti..covm..pezi..nlah..kkll..zwer..nypd..usam..tabe..vawe..moba..pykw..zida..maas..repl..kuus..erif..kook..nile..oonn..vari..boop..geno..kasp..ogdo..npph..kolz..copa..lyli..moss..foqe..mmpa..efji..iiss..jdyi..vpsh..agho..vvoa..epor..sglh..lisp..weui..nobu..igdm..booa..omfl..igal..qlkm..coos..wbxd..pola..cosd..plam..ygkz..cadq..tirp..ribd..reig..enfp..ekvf..ytbn..fdcz..urnb..lmas..iicc..wrui..rejg..pcqq..igvm..nusm..ehiz..eqew..paas..pahd..mppq..qscx..sspq..iqll..ddsg..gatz..eqza..gash..qopz..qore..fofd..sato..saba..foty..foza..coty..kiop..kiwm..kifr..jycx..jypo..jywd..jyos..typo..tyos..tywd..darj..dapo..dazx..craa..qarj..qazx..qapo..coba..coaq..cosw..goba..goaq..gosw..qotr..qoqa..qowd..iotr..iowd..ioqa..hhoo..hhee..hhmm..tgvv..tgpo..thgz..bhgr..bhui..bhtw..ahtw..ahgr..ahui..neqp..neon..nerz..erqw..assm..mztu..mzop..mzqw..pouu..poqw..zouu..zoqw..bpto..bpws..bpsm..znto..taqw..taoy..tasa..yytw..yyza..popn..poaz..wspn..wsaz..wsuu..kitu..kizu..kiqu..miqe..mitu..miza..gaqq..waqq..gazp..gayn..wazp..wayn..agvv..agpo..aghz..vvoo..vvmm..erop..weqp..werz..weon..vatq..vaze..vapo..gaze..gatq..gapo..xaro..xatz..xash..nzoq..teza..nzqw..nztt..wzer..wzoq..wztt..wzqw..jaqw..jaoy..jasa..mzre..mzqt..mzhi..azop..azqt..azhi..wwty..wwpl..wwza..oohu..oopl..ooza..hgew..hgfu..hgml..hgkd..rzew..rzml..rzkd..ttwq..ttrd..ttap..ttza..mlwq..mlrd..mlap..mlza..ptqw..pthh..ptrz..ithh..itqw..itrz..zpas..zput..zpww..ppvs..ppvt..ppvw..yzqe..yzoo..yzaq..nbzi..hhuy..hhaz..ljuy..ljaz..nbwr..niwm..cdqw..cdmx..cdaz..cdwe..cdtt..cdpo..cdcc..ldhy..cdxx..nooa..qqqe..iisa..wnlu..hoop..pqgs..orkf..koom..bbbw..bbbe..cuag..bbbr..yoqs..stax..eucy..nqhd..maiv..lkfr..lkhy..muuq..miia..irjg..rtgf..qqqw..moia..zaps..aeur..cool..wisz..wiaw..nood..looy..vook..kool..uazq..uajs..kaaa..bgjs..bgzq..qehu..qepi..vepi..vehu..paaa..qeza..veza..lqqw..xcmb..waqa..zzla..rivd..maql..tisc..nqsq..piiq..reqg..maak..vtua..guer..qmak..hlas..vfgj..neer..sevr..pooe..moqs..wiot..efdc..hgsh..ufwj..gujd..irfk..rigd..mmuz..udla..ttii..xcvf..voom..fgnh..rigj..sijr..bbnm..npsg..xcbg..gtys..fgui..hhjk..iiof..dewd..jhbg..qbaa..nuhb..dmay..egfg..mmob..bpqd..rguy..dwqs..wdlo..zqqw..ssoi..hajd..fefg..ifla

Ransom Note and Payment Demands

After encrypting files, STOP displays ransom notes demanding payment for file recovery:

file!!!DATA_RESTORE!!!.txt
file!!!RESTORE_DATA!!!.txt
file!!!KEYPASS_DECRYPTION_INFO!!!.txt
file!!!DECRYPTION__KEYPASS__INFO!!!.txt
file!!!WHY_MY_FILES_NOT_OPEN!!!.txt
file!!!SAVE_FILES_INFO!!!.txt
file!readme.txt

Ransom message:

notes/!readme.txt

Note locations:

EveryFolder
file_openme.txt

Ransom message:

notes/_openme.txt

Note locations:

EveryFolder
file_readme.txt

Ransom message:

notes/_readme.txt

Note locations:

EveryFolder
file_open_.txt
file__readme.txt
file!!!YourDataRestore!!!.txt

Technical Indicators

Associated Executable Files

The following executable files are associated with STOP ransomware:

  • 0302_2019-02-03_15-41.exe
  • 05177199.exe
  • 08212099.exe
  • 09446899.exe
  • 1.bin
  • 1.exe
  • 1601_2019-01-16_22-58.exe
  • 1846355404.EXE
  • 1MBIKZ45.exe
  • 20240829253.exe
  • 23954824.exe
  • 2401_2019-01-24_12-52.exe
  • 3.exe
  • 34EFCDSAX.EXE.TMP
  • 34fedwfe.exe
  • 39.exe
  • 3b84.exe
  • 3BD2J1DJ.exe
  • 3c31.exe
  • 3db3.exe
  • 419b.exe
  • 585939.exe
  • 7F2E.EXE
  • 850867.exe
  • 8687460552.EXE
  • A3E1binexe.exe
  • afvtnii.exe
  • aiecxdy.exe
  • aludci.exe
  • amix.exe
  • aslejn.exe
  • aylpsaww.exe
  • ays3ueggw.exe
  • azbmtwy.exe
  • B2.tmp.exe
  • bdpxte.exe
  • be2.exe
  • betting.exe
  • bigthing.exe
  • bin.bin
  • bqiewt.exe
  • brgrtv3f.exe
  • brpwmfdl.exe
  • bsvnx.exe
  • build.exe
  • buildp.exe
  • buildz.exe
  • Bujingle.exe
  • Buskepas.exe
  • cjebe.exe
  • covf.exe
  • CUsersabdoAppDataLocalde14c4d4-af10-40ba-b2e7-b7cd78dfba75FCEB.tmp.exe
  • CUsersUsAppDataLocalda3f3088-b399-4c9e-9d41-a0f53620c708E214.tmp.exe
  • cveog.exe
  • DHL7YG.exe
  • DJVU Ransomware.exe
  • dmkdih.exe
  • dubi.exe
  • DW8VXDZI.exe
  • edrgweasdvrb.exe
  • efzdqtpc.exe
  • enbyzga.exe
  • eqmmweay.exe
  • executable.exe
  • eyrfrip.exe
  • F9RT5XP5.exe
  • factura.exe
  • Fameros.exe
  • fce.exe
  • file.bin
  • file.exe
  • fjklzp.exe
  • fkpbzs.exe
  • fphemzq.exe
  • fqkwzdo.exe
  • fsprm.exe
  • fumiefqw.exe
  • funuir.exe
  • fwnfeic.exe
  • fyyfc.exe
  • gapijonc.exe
  • gayn.exe
  • gazp.exe
  • gdusei.exe
  • gehfgfjk.exe
  • gepquoqguv.exe
  • gFaZbGmI
  • gixj.exe
  • glitters.exe
  • gunshot.exe
  • gvhhzwub.exe
  • HerbalEssentials.exe
  • hgxctcth.exe
  • hlmoj.exe
  • Huklus.exe
  • humanity.exe
  • Hungle.exe
  • Hunlipaos.exe
  • hvfcfwbh.exe
  • hvlawaos.exe
  • HYDOADC8.exe
  • IEWO4X01.exe
  • important.exe
  • important_document.exe
  • ISJ5KN4I.exe
  • IVE39D.exe
  • jrinzssq.exe
  • jrsnygu.exe
  • jsjof.exe
  • jtdnwf.exe
  • JTDNWF.EXE
  • Keypass.exe
  • killeryuga.exe
  • km0TTTU1Ig.exe
  • krgqwi.exe
  • kyamstr.exe
  • liegkzrz.exe
  • load1903.exe
  • logger270.exe
  • lpjlujyr.exe
  • lwxhwfcu.exe
  • msoffice.exe
  • mvsnmp.exe
  • myfile.exe
  • NUMXYW9D.exe
  • olbkummk.exe
  • oqrvau.exe
  • oqvq.exe
  • ozlep.exe
  • PBER65.exe
  • pbky.exe
  • petshop.exe
  • phpAdLvuq
  • phpwXWVud
  • pqqfom.exe
  • proc.exe
  • ProcessKiller.exe
  • program.exe
  • PUQ5X3W2.exe
  • pzsjx.exe
  • qdnhqd.exe
  • qfnxti.exe
  • qgrm9yxfr9.exe
  • qhnvv.exe
  • qnsuk.exe
  • qoapybn.exe
  • qtyzkum.exe
  • qvwloVnL.exe
  • qwvqvk.exe
  • R2JL7SXH.exe
  • redcsrvtf.exe
  • report727.exe
  • rewrtrbvfd.exe
  • ridaigx.exe
  • RJ9067X4.exe
  • rlpvcs.exe
  • ryuk.exe
  • sample.mlw
  • sbap.exe
  • sbut.exe
  • Setup160.exe
  • sgsdfgds.exe
  • sifrtud
  • sndjxmz.exe
  • software.exe
  • sqlreader.exe
  • start.exe
  • starticon2.exe
  • STOP.exe
  • Stop.exe
  • Stop7.exe
  • svhost.exe
  • swyfkv.exe
  • talq.exe
  • tcygx.exe
  • Techniques.exe
  • twgiwo.exe
  • twgruos.exe
  • tygrfed.exe
  • ubmahi.exe
  • ucxiwb.exe
  • uiabfuuc.exe
  • UIXF9YSH.exe
  • ukqxssy.exe
  • update.exe
  • updatewin.exe
  • updatewin1.exe
  • uqksn.exe
  • urpress.bin
  • urpress.exe
  • uvjhup.exe
  • uwzqmrjc.exe
  • vatup.exe
  • vwmzyfx.exe
  • wchnu.exe
  • wcvqmaz.exe
  • wcyn.exe
  • WMPLAYER.EXE
  • wmplayer.exe
  • wnyknmp.exe
  • xnnhvtk.exe
  • xspf.exe
  • ycnsqgn.exe
  • yhom.exe
  • yhtvjk.exe
  • yipogls.exe
  • yowa.exe
  • ythgrfed.exe
  • YTHGRFED.EXE
  • yvircma.exe
  • yvxi.exe
  • zBeQxOa
  • zejw.exe
  • zldik.exe
  • zplgo.exe
  • zqvu.exe
  • zstimge.exe
  • zufocosq.exe
  • ZXJ9GJ.exe
  • zzz.exe
  • rfcle.exe
  • ckdlp.exe
  • qorw.exe
  • ljrhywfh.exe
  • malware.exe
  • gsqonx.exe
  • jpcmgaay.exe
  • crack.exe
  • 4088.exe
  • zbetcheckin_tracker_49.exe
  • tngub.exe
  • tlde.exe
  • xukac.exe
  • zunzzjvu.exe
  • behasavunu.exe

Recovery and Decryption Tools

Good news! Decryption tools are available for STOP ransomware:

0

1

2

Elastio Can Help You

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About This Analysis

This STOP ransomware analysis is part of Elastio's comprehensive ransomware detection database. Elastio provides advanced ransomware protection and recovery solutions, helping organizations defend against and recover from ransomware attacks like STOP.

Last updated: July 30, 2025

STOP Ransomware - Detectable by Elastio