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Clop

Clop (Cl0p) is a ransomware and data-extortion group known for mass-exploiting enterprise file-transfer software flaws to steal data and extort victims.

Known aliases

  • Cl0p
  • Cl0p ransomware group
  • Clop extortion gang
  • Clop ransomware
  • Clop ransomware gang
  • UNC2546

Current stories

securityOne report1 publisher

Victims confirmed 247 of a record 2,627 ransomware claims in Q3, Comparitech says

Comparitech counted 2,627 ransomware attacks claimed in Q3 2026, a quarterly record up 27% on Q2 and 61% on a year earlier. Victims have confirmed 247 of those claims, so the record is mostly a count of what the gangs themselves assert.

Reality

Evidence42
Adoption
Not scored
Hype gap+30
Incentives
Not scored
Confidence40
securityConfirmed5 publishers

Kiteworks clears customers to restart file-transfer servers after a weekend shutdown on a federal tip

Kiteworks lifted its worldwide shutdown advice after patching a critical flaw in a feature used by under 1% of customers. Self-hosted operators stopped and restarted on the vendor's word alone, with no CVE yet to check the fix against.

Perspective Coverage

5 publishers
Builder
Builder 23%
Operator
Operator 60%
Investor
Investor 17%

Reality

Evidence55
Adoption
Not scored
Hype gap+15
Incentives70
Confidence60
securityOne report1 publisher

ShinyHunters' leak samples expose named FBI agents' medical exams

ShinyHunters has shown journalists FBI medical exams that name agents and their addresses, from a set it says covers about 60,000 current and former staff. The FBI has so far confirmed only an incident in FBIJobs-related systems, and the group is threatening to publish within five days.

Publishers:malwarebytes.com

Reality

Evidence45
Adoption
Not scored
Hype gap+20
Incentives60
Confidence45
securityOne report1 publisher

Clop's 43-victim batch puts PLM servers, not file transfer, at the centre of mass exploitation

Shell says it is investigating after Clop claimed 89GB of engineering data. It is one of 43 names the gang tied to a single flaw in internet-exposed PTC Windchill and FlexPLM.

Reality

Evidence60
Adoption
Not scored
Hype gap+25
Incentives60
Confidence58
securityConfirmed5 publishers

Kiteworks tells customers to shut down even internal file-sharing servers for six hours

Kiteworks told customers worldwide to power off its file-sharing servers for six hours on September 26 after a federal warning of a possible attack. Servers with no internet exposure are included, so being on release 9.5.1 with every known fix does not by itself clear a customer.

Perspective Coverage

5 publishers
Builder
Builder 18%
Operator
Operator 73%
Investor
Investor 9%

Reality

Evidence58
Adoption
Not scored
Hype gap+20
Incentives45
Confidence62
securityOne report1 publisher

ShinyHunters breached Clop's leak site through an unpatched Grav path traversal flaw

ShinyHunters took over Clop's Tor leak site by exploiting CVE-2026-42608, an unauthenticated path traversal flaw in Grav CMS. The fix reached the still-popular Grav 1.7 branch only after the breach, in release 1.7.53.4.

Reality

Evidence68
Adoption
Not scored
Hype gap+5
Incentives62
Confidence66
securityConfirmed14 publishers

ShinyHunters pins its claimed FBI breach on an unpatched PeopleSoft RCE

The extortion crew defaced apply.fbijobs.gov on September 22 and told reporters it got remote code execution from a new Oracle PeopleSoft flaw, the same one it says it is now using against Fortune 500 targets. No technical details are public.

Perspective Coverage

14 publishers
Builder
Builder 20%
Operator
Operator 67%
Investor
Investor 13%

Reality

Evidence40
Adoption
Not scored
Hype gap+40
Incentives75
Confidence60
securityConfirmed6 publishers

ShinyHunters claims the private keys to Clop's onion address after defacing the leak site

BleepingComputer confirmed the defacement and the file ShinyHunters uploaded to Clop's Tor site. The stolen logs and the onion keys are so far only the attacker's account, and Clop has 72 hours to make contact.

Perspective Coverage

6 publishers
Builder
Builder 18%
Operator
Operator 63%
Investor
Investor 19%

Reality

Evidence60
Adoption55
Hype gap+35
Incentives78
Confidence62
securityOne report1 publisher

Clop asks ShinyHunters to come online from the leak site ShinyHunters defaced

For two days ShinyHunters published eight-figure demands on Clop's onion address and served Salesforce data through it. On September 21 a short message attributed to Clop appeared there instead, asking for contact.

Publishers:hackread.com

Reality

Evidence55
Adoption35
Hype gap+8
Incentives78
Confidence55
productOne report1 publisher

ShinyHunters says it controls the private keys to Cl0p's onion address

ShinyHunters told BleepingComputer it took Cl0p's source code, the contents of /var/log and the private keys to the gang's Tor address, and gave Cl0p 72 hours to pay. That last item decides who can host the same onion URL.

Publishers:techradar.com

Reality

Evidence32
Adoption22
Hype gap+34
Incentives82
Confidence44
securityOne report1 publisher

Both banks Everest named in April traced the breach to a third-party vendor

Intel 471's 18-month sweep of the underground counted 340 financial-sector extortion victims across 74 countries, 159 firms with access for sale and 562 claimed DDoS attacks. The dated intrusions came in through vendors and help-desk calls.

Publishers:intel471.com

Reality

Evidence40
Adoption55
Hype gap+22
Incentives78
Confidence47
securityOne report1 publisher

Attackers dump PaperCut databases through the freshly patched auth bypass chain

PaperCut shipped emergency fixes for CVE-2026-81578 and CVE-2026-82078 on Thursday and Friday, and by the weekend Defused was watching honeypot intruders bypass authentication and read database tables instead of running code.

Reality

Evidence62
Adoption58
Hype gap+18
Incentives58
Confidence60
buildOne report1 publisher

Clop's Windchill implant borrows the app's own keystore, so app logs are the only witness

ReliaQuest says a custom JSP web shell decrypts LDAP admin secrets with Windchill's own API and indexes the design vault over existing database connections. Network telemetry sees very little.

Publishers:dev.to

Reality

Evidence34
Adoption20
Hype gap+26
Incentives62
Confidence36