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:
- Suspected Kimsuky (APT-Q-2) attacks South Korean companies
April 11, 2025
Kimsuky, alias Mystery Baby, Baby Coin, Smoke Screen, Black Banshe, etc., is tracked internally by Qi’anxin as APT-Q-2. The APT group was publicly disclosed in 2013, with attack activity dating as far back as 2012. Kimsuky’s main target for attacks has been South Korea, involving defense, education, energy, government, healthcare, and think tanks, with a focus ...
- Researcher uncovers dozens of sketchy Chrome extensions with 4 million installs
April 11, 2025
Google is hosting dozens of extensions in its Chrome Web Store that perform suspicious actions on the more than 4 million devices that have installed them and that their developers have taken pains to carefully conceal. The extensions, which so far number at least 35, use the same code patterns, connect to some of the same ...
- GOFFEE continues to attack organizations in Russia
April 10, 2025
GOFFEE is a threat actor that first came to our attention in early 2022. Since then, Kaspersky researchers have observed malicious activities targeting exclusively entities located in the Russian Federation, leveraging spear phishing emails with a malicious attachment. Starting in May 2022 and up until summer of 2023, GOFFEE deployed modified Owowa (malicious IIS module) in ...
- Incomplete NVIDIA Patch to CVE-2024-0132 Exposes AI Infrastructure and Data to Critical Risks
April 10, 2025
In September 2024, NVIDIA released several updates to address a critical vulnerability (CVE-2024-0132) in its NVIDIA Container Toolkit. If exploited, this vulnerability could expose AI infrastructure, data, or sensitive information. With a CVSS v3.1 rating of 9.0, all customers were advised to update their affected software immediately. Further research, however, uncovered that the patch was incomplete. ...
- Password Spray Attacks Taking Advantage of Lax MFA
April 10, 2025
In the first quarter of 2025, Rapid7’s Managed Threat Hunting team observed a significant volume of brute-force password attempts leveraging FastHTTP, a high-performance HTTP server and client library for Go, to automate unauthorized logins via HTTP requests. This rapid volume of credential spraying was primarily designed to discover and compromise accounts not properly secured by multi-factor ...
- Operation Endgame follow-up leads to five detentions and interrogations as well as server takedowns
April 9, 2025
Following the massive botnet takedown codenamed Operation Endgame in May 2024, which shut down the biggest malware droppers, including IcedID, SystemBC, Pikabot, Smokeloader and Bumblebee, law enforcement agencies across North America and Europe dealt another blow to the malware ecosystem in early 2025. In a coordinated series of actions, customers of the Smokeloader pay-per-install botnet, operated ...