DeadLock is a ransomware family discovered in July 2025. It is notable for not being associated with any known affiliate programs and for lacking a Data Leak Site (DLS). This, combined with the limited number of reported victims, has resulted in low exposure for the group. However, Group-IB specialists have discovered an interesting use of Polygon smart contracts for proxy server address rotation or distribution.
This finding warrants public attention, especially since the abuse of this specific blockchain for malicious purposes has not been widely reported. In addition, the recent discovery of similar techniques show that the abuse of smart contracts for malicious purposes could become an emerging trend.
Read more…
Source: Group IB
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- CISA Releases One Industrial Control Systems Advisory
January 31, 2023
CISA released one Industrial Control Systems (ICS) advisory on January 31, 2023. This advisory provides timely information about current security issues, vulnerabilities, and exploits surrounding ICS. CISA encourages users and administrators to review the newly released ICS advisory for technical details and mitigations. Read more… Source: U.S. Cybersecurity and Infrastructure Security Agency
- Prilex modification now targeting contactless credit card transactions
January 31, 2023
Prilex is a singular threat actor that has evolved from ATM-focused malware into unique modular PoS malware – actually, the most advanced PoS threat Kaspersky have seen so far, as described in a previous article. Forget about those old memory scrapers seen in PoS attacks. Prilex goes beyond these, and it has evolved very differently. This ...
- Exploit released for critical VMware vRealize RCE vulnerability
January 31, 2023
Horizon3 security researchers have released proof-of-concept (PoC) code for a VMware vRealize Log Insight vulnerability chain that allows attackers to gain remote code execution on unpatched appliances. VMware patched four security vulnerabilities in its vRealize log analysis tool last week, two being critical and allowing remote attackers to execute code on compromised devices. Read more… Source: Bleeping Computer
- University of Michigan Health says cyber attack impacted public websites, not patient info
January 30, 2023
Michigan Health officials say its public websites experienced issues due to a cyber attack but claims the issue did not impact patient information. In a statement on Monday, officials say the attack affected a “third-party vendor we use to host some of our sites.” Read more… Source: CBS Detroit News
- Come to the dark side: hunting IT professionals on the dark web
January 30, 2023
The dark web is a collective name for a variety of websites and marketplaces that bring together individuals willing to engage in illicit or shady activities. Dark web forums contain ads for selling and buying stolen data, offers to code malware and hack websites, posts seeking like-minded individuals to participate in attacks on companies, and ...
- JD Sports hit by cyber-attack that leaked 10m customers’ data
January 30, 2023
The fashion retailer JD Sports said the personal and financial information of 10 million customers was potentially accessed by hackers in a cyber-attack. The company said incident, which affected some online orders made by customers between November 2018 and October 2020, targeted purchases of products of its JD, Size?, Millets, Blacks, Scotts and Millets Sport brands. Read ...