Through the years of analyzing identity compromises in the cloud, Fortinet researchers have seen the same attackers pop up regularly, some more frequently than others. Among the more prolific ones they’ve come to know is one they’ve dubbed “EC2 Grouper”. Over the past couple of years, they’ve seen this actor in several dozen customer environments, making them one of the more active groups we’ve tracked.
This usual suspect is attributed by their penchant for using similar user agents and the same security group naming convention in their attacks. While indicators such as user agents and even security group names can assist in attribution and hunting, Fortinet have found them unreliable for comprehensive threat detection.
Read more…
Source: Fortinet
Related:
- RondoDox: From Targeting Pwn2Own Vulnerabilities to Shotgunning Exploits
October 9, 2025
The Trend Zero Day Initiative (ZDI) Threat Hunting and Trend Research teams have identified a significant RondoDox botnet campaign that targets a wide range of internet-exposed infrastructure. This campaign consists of over 50 exploits, including unpatched router flaws across over 30 vendors, targeting vulnerabilities found in routers, digital video recorders (DVRs), network video recorders (NVRs), CCTV ...
- Inside Russian Market: Uncovering the Botnet Empire
October 9, 2025
The online cybercrime marketplace, Russian Market, has evolved from selling Remote Desktop Protocol (RDP) access to becoming one of the most active underground hubs for information-stealing malware logs, where stolen user credentials are traded daily. Each compromised login represents a potential gateway into corporate systems, enabling threat actors to launch credential-based attacks that put businesses, governments, ...
- Weaponized AI Assistants & Credential Thieves
October 9, 2025
Just weeks after the s1ngularity attack weaponized AI assistants, the NPM ecosystem was rocked by a far more dangerous threat: a self-propagating worm named Shai-Hulud. In a sobering demonstration of this rapid escalation in attack techniques, the worm has compromised over 187 packages, including several developer-facing tools published by cybersecurity firm CrowdStrike. These two distinct events ...
- Hack on Japan’s biggest brewer renews concerns over cyberattack readiness
October 8, 2025
Japan’s favorite beer brand is reeling from a cyberattack that paralyzed its production last week. Its factories have started brewing again, and some truckloads of beer are leaving its warehouses, but the attack has spotlighted the poor cybersecurity readiness among top-tier companies in the world’s fifth-largest economy. On Tuesday, Qilin, a ransomware group with a track ...
- Security bug in India’s income tax portal exposed taxpayers’ sensitive data
October 7, 2025
The Indian government’s tax authority has fixed a security flaw in its income tax filing portal that was exposing sensitive taxpayers’ data, TechCrunch has exclusively learned and confirmed with authorities. The flaw, discovered in September by a pair of security researchers Akshay CS and “Viral,” allowed anyone who was logged into the income tax department’s e-Filing ...
- Oracle patches actively exploited zero-day vulnerability in E-Business Suite
October 6, 2025
Oracle has patched a critical vulnerability in E-Business Suite that was actively exploited in data theft attacks by the Clop group. This is a zero-day vulnerability, registered as CVE-2025-61882, which allows remote code execution on affected systems without authentication. The flaw is located in the Concurrent Processing component of Oracle E-Business Suite, in the integration with ...