ShadowSyndicate "had been associated with the ALPHV/BlackCat, Cl0p, Royal, Play, Cactus, Nokoyawa, and Quantum ransomware operations."
Clop
Cl0p, also written as Clop, is a ransomware family and the name of an associated Russian-speaking, financially motivated ransomware and data-extortion operation.
Clop
Family profile
Cl0p, also written as Clop, is a ransomware family and the name of an associated Russian-speaking, financially motivated ransomware and data-extortion operation. It has been linked to activity tracked as TA505. Cl0p attacks have combined file encryption with data theft and threats to publish stolen information, while more recent campaigns have emphasized data-theft extortion without deploying an encryptor.
The operation is particularly associated with mass exploitation of vulnerabilities in enterprise managed-file-transfer software. Its campaigns have targeted Accellion FTA, Fortra GoAnywhere MFT, Progress MOVEit Transfer, and Cleo products, as well as enterprise business software such as Oracle E-Business Suite. Documented exploitation includes CVE-2023-0669 in GoAnywhere MFT and CVE-2023-34362 in MOVEit Transfer. These compromises enable theft of sensitive information and can expose data belonging to customers and other downstream organizations.
Cl0p uses a Tor-hosted leak site to identify victims and publish stolen data when payment demands are not met. It has also distributed stolen datasets through torrents, increasing their accessibility and complicating containment. Its campaigns affect organizations across multiple countries and industries, including healthcare, financial services, legal services, manufacturing, and distribution.
Capabilities
- Exfiltration
- Extortion
- Initial Access
Samples
Recent samples
1 sandbox sample in the Derp library, newest 1 shown
Reported operators
Threat actors
13 named in public reportingThe vulnerability was first reported on February 1, 2023 as being exploited by the Clop ransomware group, which said it had compromised over 100 organizations that use Fortra’s file-transfer technology.
Les hackers de ShinyHunters ont récemment compromis l'infrastructure du gang de ransomwares Cl0p.
Cl0p is a Russia-speaking ransomware and data-extortion group best known for exploiting zero-day vulnerabilities in enterprise file-transfer and business software.
Payments to ransomware gangs such as Bitpaymer, DopplePaymer, WastedLocker, and Clop carried a sanction violations risk in 2020... Clop: Disputed but speculated to be associated with Evil Corp.
Until November 21 when they gained admin rights on an unpatched machine, the attackers moved through UM's network compromising servers left and right until it finally deployed the Clop ransomware payload on 267 Windows systems.
Cl0p ransomware affiliates are actively exploiting this vulnerability against manufacturing, automotive, aerospace, and retail organizations.
Cl0p ransomware affiliates are exploiting exposed PTC Windchill and FlexPLM servers to steal engineering and product-design data.
the Oracle EBS platform has been under sustained, documented attack by the Cl0p ransomware group and suspected FIN11 operators throughout 2025 and into 2026
Cl0p Ransomware, aka Cl0p, is a ransomware group that emerged in February 2019 and targeted most industries worldwide, including retail, transportation, education, manufacturing, automotive, energy, financial, telecommunications and even healthcare.
Prior to its patching, attackers linked to the Clop ransomware operation were already exploiting CVE-2023-34362 as a zero-day vulnerability.
...observed the group using OpenSSH and Impacket to move laterally and deploy Clop ransomware.
The following analytic identifies the execution of CLOP ransomware variants using specific arguments ("runrun" or "temp.dat") to trigger their malicious activities.
Exploited software
Vulnerabilities linked to Clop
40 CVEsMITRE ATT&CK
Clop in ATT&CK
72 distinct techniquesTechniques
72 techniquesReporting
Research mentioning Clop
Harley Davidson Alleged Breach - CL0P Ransomware Adds Motorcycle Maker to the List
The CL0P ransomware operation has added motorcycle manufacturer Harley-Davidson to its public extortion leak site, claiming it compromised the company. The listing was highlighted by the ransomNews threat-monitoring account, but Harley-Davidson and its parent organization have not publicly confirmed an intrusion or data theft. CL0P provided no sample files, screenshots, ransom note, stolen-data archive, or technical indicators to substantiate the claim. The purported initial-access vector, affected business unit, scope and type of data allegedly stolen, and whether ransomware encryption occurred remain unknown; the incident should be treated as unconfirmed pending independent validation or an official disclosure.
Harley-Davidson Alleged Breach - CL0P Ransomware Adds Motorcycle Maker to the List | Cryptika Cybersecurity
GitHub - tjnel/certgraveyard_yara: Automated YARA rule generation from the Cert Central compromised certificate database. · GitHub
A public project called CertGraveyard has expanded efforts to document abused code-signing certificates used to sign malware, building a shared record of certificate abuse and helping defenders trigger revocations with certificate authorities. The project’s creator said the initiative grew out of years of reporting malicious certificates tied to malware such as SolarMarker, and has helped report more than 2,000 certificates, later growing to roughly 2,400 entries in the database. Supporting tooling includes certReport, which automates abuse reports from malware hashes using sources such as VirusTotal and MalwareBazaar, plus an API, downloadable datasets, feeds, hunting queries, and integrations with platforms including MalwareBazaar, UnpacMe, Malcat, MagicSword.io, and WDAC enforcement workflows. The database reflects a broader pattern in which threat actors repeatedly obtain or abuse valid Authenticode certificates to make malware appear trustworthy, reduce Windows warnings, and sustain delivery campaigns. Prior reporting cited SolarMarker cycling through impostor-issued certificates, FakeBat distributing signed MSI and MSIX installers, Netbounce using valid certificates and fake software branding, Dark Caracal signing Bandook variants with legitimate certificates, and Operation Red Signature abusing a stolen vendor certificate in a supply-chain intrusion. CertGraveyard’s operator said certificate authorities often act on external reports within hours, making revocation a practical disruption measure, though the project has also faced operational pressure including a major DDoS attack while handling heavy daily lookup and download volumes from defenders and malware-analysis integrations.
Ransomware Group clop Hits: HONGHE-TECH.COM
The Clop ransomware operation has repeatedly targeted enterprise networks with intrusions that begin with phishing or exploitation of exposed systems, followed by manual lateral movement, credential theft, and domain-wide deployment. Reporting from ANSSI and AhnLab linked earlier campaigns to TA505, describing attacks in which operators used tools such as Cobalt Strike and Mimikatz, encrypted files with .Clop or .CIop extensions, and disrupted business operations at victims including E-Land Group, Software AG, and reportedly Indiabulls Group. Analysts also observed Clop using signed malware components, targeting Active Directory environments, stopping business-critical services before encryption, and in some cases preserving shadow copies depending on the variant. The group increasingly shifted from encryption-only attacks to double extortion and broader data-leak pressure tactics. Clop operators published stolen files on leak sites, demanded multimillion-dollar payments, contacted victims' customers directly to intensify pressure, and were tied to mass data-theft campaigns exploiting managed file transfer flaws such as CVE-2023-0669 in Fortra GoAnywhere MFT, which was linked to theft from about 130 companies. More recent victim listings attributed to Clop include organizations in the U.S., Canada, Peru, China, Taiwan, and Europe across technology, manufacturing, retail, and other sectors, underscoring the group's continued global focus on enterprise-scale ransomware and data-breach operations.