From January through May 2026, Mandiant identified a financially motivated data theft extortion campaign executed by the threat cluster UNC3753 (also tracked as “Luna Moth,” “Chatty Spider,” and “Silent Ransom Group”) targeting dozens of organizations across professional, legal, and financial services in the United States.
UNC3753 leverages voice phishing (vishing) and social engineering deception techniques to achieve remote access into corporate environments. Using pretexts such as data migration or invoice related emails, the threat actors initiate phone conversations posing as IT support and convince targets to host screen-sharing sessions and download remote monitoring and management (RMM) utilities.
Read more…
Source: Mandiant
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- ZDI-21-502: An Information Disclosure Bug In ISC Bind Server
June 16, 2021
Last year, we received a submission of a remote code execution vulnerability in the ISC BIND server. Later, that same anonymous researcher submitted a second bug in this popular DNS server. Similar to the first bug, it exists within the Simple and Protected GSSAPI Negotiation Mechanism (SPNEGO) component, and its location is quite close to ...
- Apple Hurries Patches for Safari Bugs Under Active Attack
June 15, 2021
Apple issued two out-of-band security fixes for its Safari web browser, fixing zero-day vulnerabilities that “may have been actively exploited,” according to a Monday security bulletin by the company. The bugs affect sixth-generation Apple iPhones, iPads and iPod touch model hardware, released between 2013 and 2018. “Apple is aware of a report that this issue may ...
- Critical remote code execution flaw in thousands of VMWare vCenter servers remains unpatched
June 15, 2021
Researchers have warned that thousands of internet-facing VMWare vCenter servers still harbor critical vulnerabilities weeks after patches were released. The vulnerabilities impact VMWare vCenter Server, a centralized management utility. VMWare issued patches for two critical bugs, CVE-2021-21985 and CVE-2021-21986, on May 25. Read more… Source: ZDNet
- Paradise Ransomware source code released on a hacking forum
June 15, 2021
The complete source code for the Paradise Ransomware has been released on a hacking forum allowing any would-be cyber criminal to develop their own customized ransomware operation. Released on the hacking forum XSS, the link to the source code is only accessible to active users on the site who have previously replied to or reacted to ...
- Andariel evolves to target South Korea with ransomware
June 15, 2021
In April 2021, we observed a suspicious Word document with a Korean file name and decoy. It revealed a novel infection scheme and an unfamiliar payload. While we were doing our research into these findings, Malwarebytes published a nice report with technical details about the same series of attacks, which they attributed to the Lazarus ...
- REvil ransomware hits US nuclear weapons contractor
June 14, 2021
US nuclear weapons contractor Sol Oriens has suffered a cyberattack allegedly at the hands of the REvil ransomware gang, which claims to be auctioning data stolen during the attack. Sol Oriens describes itself as helping the “Department of Defense and Department of Energy Organizations, Aerospace Contractors, and Technology Firms carry out complex programs.” However, job postings first ...