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
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..iflaRansom Note and Payment Demands
After encrypting files, STOP displays ransom notes demanding payment for file recovery:
!!!DATA_RESTORE!!!.txt!!!RESTORE_DATA!!!.txt!!!KEYPASS_DECRYPTION_INFO!!!.txt!!!DECRYPTION__KEYPASS__INFO!!!.txt!!!WHY_MY_FILES_NOT_OPEN!!!.txt!!!SAVE_FILES_INFO!!!.txt!readme.txtRansom message:
notes/!readme.txt
Note locations:
EveryFolder_openme.txtRansom message:
notes/_openme.txt
Note locations:
EveryFolder_readme.txtRansom message:
notes/_readme.txt
Note locations:
EveryFolder_open_.txt__readme.txt!!!YourDataRestore!!!.txtTechnical Indicators
Associated Executable Files
The following executable files are associated with STOP ransomware:
0302_2019-02-03_15-41.exe05177199.exe08212099.exe09446899.exe1.bin1.exe1601_2019-01-16_22-58.exe1846355404.EXE1MBIKZ45.exe20240829253.exe23954824.exe2401_2019-01-24_12-52.exe3.exe34EFCDSAX.EXE.TMP34fedwfe.exe39.exe3b84.exe3BD2J1DJ.exe3c31.exe3db3.exe419b.exe585939.exe7F2E.EXE850867.exe8687460552.EXEA3E1binexe.exeafvtnii.exeaiecxdy.exealudci.exeamix.exeaslejn.exeaylpsaww.exeays3ueggw.exeazbmtwy.exeB2.tmp.exebdpxte.exebe2.exebetting.exebigthing.exebin.binbqiewt.exebrgrtv3f.exebrpwmfdl.exebsvnx.exebuild.exebuildp.exebuildz.exeBujingle.exeBuskepas.execjebe.execovf.exeCUsersabdoAppDataLocalde14c4d4-af10-40ba-b2e7-b7cd78dfba75FCEB.tmp.exeCUsersUsAppDataLocalda3f3088-b399-4c9e-9d41-a0f53620c708E214.tmp.execveog.exeDHL7YG.exeDJVU Ransomware.exedmkdih.exedubi.exeDW8VXDZI.exeedrgweasdvrb.exeefzdqtpc.exeenbyzga.exeeqmmweay.exeexecutable.exeeyrfrip.exeF9RT5XP5.exefactura.exeFameros.exefce.exefile.binfile.exefjklzp.exefkpbzs.exefphemzq.exefqkwzdo.exefsprm.exefumiefqw.exefunuir.exefwnfeic.exefyyfc.exegapijonc.exegayn.exegazp.exegdusei.exegehfgfjk.exegepquoqguv.exegFaZbGmIgixj.exeglitters.exegunshot.exegvhhzwub.exeHerbalEssentials.exehgxctcth.exehlmoj.exeHuklus.exehumanity.exeHungle.exeHunlipaos.exehvfcfwbh.exehvlawaos.exeHYDOADC8.exeIEWO4X01.exeimportant.exeimportant_document.exeISJ5KN4I.exeIVE39D.exejrinzssq.exejrsnygu.exejsjof.exejtdnwf.exeJTDNWF.EXEKeypass.exekilleryuga.exekm0TTTU1Ig.exekrgqwi.exekyamstr.exeliegkzrz.exeload1903.exelogger270.exelpjlujyr.exelwxhwfcu.exemsoffice.exemvsnmp.exemyfile.exeNUMXYW9D.exeolbkummk.exeoqrvau.exeoqvq.exeozlep.exePBER65.exepbky.exepetshop.exephpAdLvuqphpwXWVudpqqfom.exeproc.exeProcessKiller.exeprogram.exePUQ5X3W2.exepzsjx.exeqdnhqd.exeqfnxti.exeqgrm9yxfr9.exeqhnvv.exeqnsuk.exeqoapybn.exeqtyzkum.exeqvwloVnL.exeqwvqvk.exeR2JL7SXH.exeredcsrvtf.exereport727.exerewrtrbvfd.exeridaigx.exeRJ9067X4.exerlpvcs.exeryuk.exesample.mlwsbap.exesbut.exeSetup160.exesgsdfgds.exesifrtudsndjxmz.exesoftware.exesqlreader.exestart.exestarticon2.exeSTOP.exeStop.exeStop7.exesvhost.exeswyfkv.exetalq.exetcygx.exeTechniques.exetwgiwo.exetwgruos.exetygrfed.exeubmahi.exeucxiwb.exeuiabfuuc.exeUIXF9YSH.exeukqxssy.exeupdate.exeupdatewin.exeupdatewin1.exeuqksn.exeurpress.binurpress.exeuvjhup.exeuwzqmrjc.exevatup.exevwmzyfx.exewchnu.exewcvqmaz.exewcyn.exeWMPLAYER.EXEwmplayer.exewnyknmp.exexnnhvtk.exexspf.exeycnsqgn.exeyhom.exeyhtvjk.exeyipogls.exeyowa.exeythgrfed.exeYTHGRFED.EXEyvircma.exeyvxi.exezBeQxOazejw.exezldik.exezplgo.exezqvu.exezstimge.exezufocosq.exeZXJ9GJ.exezzz.exerfcle.execkdlp.exeqorw.exeljrhywfh.exemalware.exegsqonx.exejpcmgaay.execrack.exe4088.exezbetcheckin_tracker_49.exetngub.exetlde.exexukac.exezunzzjvu.exebehasavunu.exe
Recovery and Decryption Tools
Good news! Decryption tools are available for STOP ransomware:
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Elastio Can Help You
Don't let STOP ransomware take over your data
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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: October 30, 2025
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