Security News > 2023 > April > Microsoft: Clop ransomware gang behind PaperCut server hacks
Microsoft has attributed recent attacks on PaperCut servers to the Clop and LockBit ransomware operations, which used the vulnerabilities to steal corporate data.
Today, Microsoft disclosed that the Clop and LockBit ransomware gangs are behind these PaperCut attacks and using them to steal corporate data from vulnerable servers.
In a series of tweets posted Wednesday afternoon, Microsoft states that it has attributed the recent PaperCut attacks to the Clop ransomware gang.
"Microsoft is attributing the recently reported attacks exploiting the CVE-2023-27350 and CVE-2023-27351 vulnerabilities in print management software PaperCut to deliver Clop ransomware to the threat actor tracked as Lace Tempest," tweeted Microsoft's Threat Intelligence researchers.
Microsoft tracks this particular threat actor as 'Lace Tempest,' whose activity overlaps with FIN11 and TA505, both linked to the Clop ransomware operation.
The exploitation of PaperCut servers fits a general pattern we have seen with the Clop ransomware gang over the past three years.
News URL
Related news
- Ransomware gangs now abuse Microsoft Azure tool for data theft (source)
- Microsoft: Vanilla Tempest hackers hit healthcare with INC ransomware (source)
- Microsoft Warns of New INC Ransomware Targeting U.S. Healthcare Sector (source)
- Microsoft ends development of Windows Server Update Services (WSUS) (source)
- Microsoft Identifies Storm-0501 as Major Threat in Hybrid Cloud Ransomware Attacks (source)
- Ransomware gang using stolen Microsoft Entra ID creds to bust into the cloud (source)
- Ransomware attackers hop from on-premises systems to cloud to compromise Microsoft 365 accounts (source)
- Microsoft fixes Remote Desktop issues caused by Windows Server update (source)
- Microsoft deprecates PPTP and L2TP VPN protocols in Windows Server (source)
- Microsoft says more ransomware stopped before reaching encryption (source)
Related Vulnerability
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2023-04-20 | CVE-2023-27351 | Improper Authentication vulnerability in Papercut MF and Papercut NG This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). | 7.5 |
| 2023-04-20 | CVE-2023-27350 | Improper Access Control vulnerability in Papercut NG This vulnerability allows remote attackers to bypass authentication on affected installations of PaperCut NG 22.0.5 (Build 63914). | 9.8 |