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:
- The Next Disruptive ICS Attacker: An Advanced Persistent Threat (APT)?
August 18, 2021
No discussion on ICS attacks could be complete without talking about what some would call, ‘the elephant in the room.’ Critical infrastructure has always been a target for warfare, and modern ICS are no exception. Several high-profile ICS disruptions have in fact been attributed to malicious hackers working at the behest of a military or intelligence ...
- US Census Bureau hacked in January 2020 using Citrix exploit
August 18, 2021
US Census Bureau servers were breached on January 11, 2020, by hackers who exploited a Citrix ADC zero-day vulnerability as the US Office of Inspector General (OIG) disclosed in a recent report. “The purpose of these servers was to provide the Bureau with remote-access capabilities for its enterprise staff to access the production, development, and lab ...
- HolesWarm Malware Exploits Unpatched Windows, Linux Servers
August 18, 2021
By leveraging more than 20 known vulnerabilities in Linux and Windows servers, the HolesWarm cryptominer malware has been able to break into more than 1,000 cloud hosts just since June. The basic cryptominer botnet has been so successful at juggling so many different known vulnerabilities between attacks, researchers at Tencent who first identified HolesWarm refer to ...
- Japanese insurer Tokio Marine discloses ransomware attack
August 18, 2021
Tokio Marine Holdings, a multinational insurance holding company in Japan, announced this week that its Singapore branch, Tokio Marine Insurance Singapore (TMiS), suffered a ransomware attack. The announcement came at the beginning of the week and contains little information about the incident outside the action taken to deal with the intrusion. Read more… Source: Bleeping Computer
- CISA Alert: BadAlloc Vulnerability Affecting BlackBerry QNX RTOS
August 17, 2021
On August 17, 2021, BlackBerry publicly disclosed that its QNX Real Time Operating System (RTOS) is affected by a BadAlloc vulnerability—CVE-2021-22156. BadAlloc is a collection of vulnerabilities affecting multiple RTOSs and supporting libraries. BlackBerry QNX RTOS is ...
- Govt hackers impersonate HR employees to hit Israeli targets
August 17, 2021
Hackers associated with the Iranian government have focused attack efforts on IT and communication companies in Israel, likely in an attempt to pivot to their real targets. The campaigns have been attributed to the Iranian APT group known as Lyceum, Hexane, and Siamesekitten, running espionage campaigns since at least 2018. In multiple attacks detected in May and ...