The ShinyHunters and CL0P threat groups have returned with new claimed victims. ShinyHunters has resurfaced with a new onion-based data leak site, with the group publishing data allegedly stolen from three victims, with two apparently linked to recent vishing attacks targeting single sign-on (SSO) accounts at Okta, Microsoft and Google, which can lead to compromises of connected enterprise applications and services. In an email to The Cyber Express, a ShinyHunters spokesperson said “a lot more victims are to come from the new vishing campaign.” The CL0P ransomware group, meanwhile, has claimed 43 victims in recent days, its first victims since its exploitation of Oracle E-Business Suite vulnerabilities last year netted more than 100 victims. The group reportedly was targeting internet-facing Gladinet CentreStack file servers in its latest extortion campaign, but the threat group has posted no technical details to support the new claims.

ShinyHunters Returns

ShinyHunters has resurfaced following 2025 campaigns that saw breaches of PornHub and Salesforce environments and a “suspicious insider” at CrowdStrike. The group, which has also gone by Scattered LAPSUS$ Hunters, has claimed three new victims, all of whom have had confirmed breaches in recent weeks. One of the claimed victims is SoundCloud, which confirmed a breach in mid-December that the company said “consisted only of email addresses and information already visible on public SoundCloud profiles and affected approximately 20% of SoundCloud users.” Investment firm Betterment is another claimed victim with a recent confirmed breach. While it’s not clear if the incident is related to the ShinyHunters claims, the company reported a January 9 incident in which “an unauthorized individual gained access to certain Betterment systems through social engineering. This means the individual used identity impersonation and deception to gain access, rather than compromising our technical infrastructure. The unauthorized access involved third-party software platforms that Betterment uses to support our marketing and operations.” The third claimed victim is financial data firm Crunchbase, which confirmed a data exfiltration incident in a statement to SecurityWeek. ShinyHunters told The Cyber Express that only Crunchbase and Betterment are from the SSO vishing campaign. “We are releasing victims from many of our previous campaigns and ongoing campaigns onto our data leak site, not exclusively the SSO vishing campaign data thefts,” the spokesperson said. Meanwhile, a threat actor who goes by “LAPSUS-GROUP” has emerged recently on the BreachForums 5.0 cybercrime forum claiming data stolen from a Canadian retail SaaS company, but ShinyHunters told The Cyber Express that the actor is an “impersonator group” and has no connection to ShinyHunters.

CL0P Claims 43 New Victims

The Cl0p ransomware group appears to have launched a new extortion campaign, although it is not clear what vulnerabilities or services the group is targeting. The group listed 21 new victims last week, and then another 22 over the weekend. Alleged victims include a major hotel chain, an IT services company, a UK payment processing firm, a workforce management company, and a Canada-based mining company. In a note to clients today, threat intelligence company Cyble wrote, “At the time of reporting, Cl0p has not disclosed technical details, the volume or type of data allegedly exfiltrated, nor announced any ransom deadlines for these victims. No proof-of-compromise samples have been published. We continue to monitor the situation for further disclosures, validation of the victim listings, or escalation by the group.”

Victims of the CL0P ransomware group’s August campaign targeting Oracle E-Business Suite vulnerabilities are still coping with the aftermath of the cyberattacks, as Korean Air and the University of Phoenix have become the latest to reveal details of the breach. The University of Phoenix reported earlier this month in an SEC filing that it was among the Oracle EBS victims, after the company was named as a victim by CL0P on the threat group’s dark web data leak site. In a new filing with the Maine Attorney General’s office, the University of Phoenix revealed the extent of the breach – nearly 3.5 million people may have had their personal data compromised, including names, dates of birth, Social Security numbers, and bank account and routing numbers. The sample notification letter provided by the university offered victims complimentary identity protection services. including a year of credit monitoring, dark web monitoring, a $1 million identity fraud loss reimbursement policy, and identity theft recovery services. Oracle EBS victims continue to grapple with the aftermath of the attacks even as CL0P has reportedly moved on to a new extortion campaign targeting internet-facing Gladinet CentreStack file servers.

Korean Air Among Oracle EBS Victims

Korean Air also reported a cyberattack that appears linked to the Oracle EBS campaign. According to news reports, KC&D Service – the former in-flight catering subsidiary of the airline that’s now owned by a private equity firm – informed Korean Air of a leak that involved personal data belonging to the airline’s employees. The compromised data involved 30,000 records and included names and bank account numbers. The breach was revealed in an “internal notice,” according to the reports. The airline said no customer data appears to have been compromised by the breach. According to Korea JoongAng Daily, Woo Kee-hong, vice chairman of Korean Air, said in a message to employees, “Korean Air takes this incident very seriously, especially since it involves employee data, even if it originated from a third-party vendor that was sold off. We are currently focusing all our efforts on identifying the full scope of the breach and who was affected.” While the reports didn’t specifically mention the Oracle EBS campaign, “Korean Air Catering” was one of more than 100 victims listed by CL0P on its data leak site. Other confirmed victims in the Oracle campaign have included The Washington Post, Harvard University, Dartmouth College, the University of Pennsylvania, American Airlines’ Envoy Air, Logitech, Cox, Mazda, Canon, and Hitachi’s GlobalLogic.

CL0P’s File Services Exploits

CL0P’s ability to exploit file sharing and transfer services at scale has made it a top five ransomware group over its six-year history, with more than 1,000 known victims to date, according to Cyble threat intelligence data. Other CL0P campaigns have targeted Cleo MFT, MOVEit, CrushFTP, SolarWinds Serv-U, PaperCut, and GoAnywhere, among others. CL0P’s exploitation of Cleo MFT vulnerabilities led to a record number of ransomware attacks earlier this year, and CL0P has also successfully exploited Accellion FTA vulnerabilities. Some reports have linked the Oracle EBS campaign to the FIN11 threat group, with CL0P acting as the public face of the campaign.

The CL0P ransomware group appears to be targeting internet-facing Gladinet CentreStack file servers in its latest extortion campaign. The Curated Intelligence project said in a LinkedIn post that incident responders from its community “have encountered a new CLOP extortion campaign targeting Internet-facing CentreStack file servers.” Cyble said in a note to clients today that CL0P appears to be readying its dark web data leak site (DLS) for a new wave of victims following its exploitation of Oracle E-Business Suite vulnerabilities that netted more than 100 victims. “Monitoring of Cl0p's DLS indicates recent archiving and grouping of all previously listed victims associated with Oracle E-Business Suite exploitation under different folders, a move that strongly suggests preparation for a new wave of data leak publications,” Cyble said. “This restructuring activity is assessed to be linked to the ongoing exploitation of Gladinet CentreStack, with Cl0p likely staging victims for coordinated disclosure similar to its prior mass-extortion campaigns. No victim samples or deadlines related to the CentreStack victims have been published yet.”

CL0P May Be Targeting Gladinet CentreStack Vulnerabilities

It’s not clear if the CL0P campaign is exploiting a known or zero-day vulnerability, but in a comment on the LinkedIn post, Curated Intelligence said that an October Huntress report is “Likely related.” That report focused on CVE-2025-11371, a Files or Directories Accessible to External Parties vulnerability in Gladinet CentreStack and TrioFox that was added to CISA’s Known Exploited Vulnerabilities (KEV) catalog on Nov. 4. In a Dec. 10 report, Huntress noted that threat actors were also targeting CVE-2025-30406, a Gladinet CentreStack Use of Hard-coded Cryptographic Key vulnerability, and CVE-2025-14611, a Gladinet CentreStack and Triofox Hard Coded Cryptographic vulnerability. CVE-2025-30406 was added to the CISA KEV catalog in April, and CVE-2025-14611 was added to the KEV database on Dec. 15. In a Dec. 18 update to that post, Huntress noted the Curated Intelligence findings and said, “At present, we cannot say definitively that this is exploitation by the cl0p ransomware gang, but considering the timing of this reporting, we felt it was prudent to share this recent threat intel.” The latest release on Gladinet's CentreStack website as of December 8 is version 16.12.10420.56791, Huntress noted. “We recommend that potentially impacted Gladinet customers update to this latest version immediately and ensure that the machineKey is rotated,” the blog post said. Curated Intelligence noted that recent port scan data shows more than 200 unique IPs running the “CentreStack - Login” HTTP Title, “making them potential targets of CLOP who is exploiting an unknown CVE (n-day or zero-day) in these systems.”

CL0P’s History of File Transfer Attacks

Curated Intelligence noted that CL0P has a long history of targeting file sharing and transfer services. “This is yet another similar data extortion campaign by this adversary,” the project said. “CLOP is well-known for targeting file transfer servers such as Oracle EBS, Cleo FTP, MOVEit, CrushFTP, SolarWinds Serv-U, PaperCut, GoAnywhere, among others.” CL0P’s exploitation of Cleo MFT vulnerabilities led to a record number of ransomware attacks earlier this year, and CL0P has also successfully exploited Accellion FTA vulnerabilities. The group’s ability to successfully exploit vulnerabilities at scale has made it a top five ransomware group over its six-year-history (image below from Cyble). [caption id="attachment_107950" align="aligncenter" width="1200"] CL0P is a top five ransomware group over its six-year history (Cyble)[/caption]