In August 2025, Trend Micro investigated a new ransomware campaign orchestrated by The Gentlemen, an emerging and previously undocumented threat group. This threat actor quickly established itself within the threat landscape by demonstrating advanced capabilities through their systematic compromise of enterprise environments.
By adapting their tools mid-campaign—shifting from generic anti-AV utilities to highly targeted, specific variants—the attackers demonstrate versatility and determination, posing a significant threat to organizations regardless of their security defenses. The campaign’s attack chain exposed several highly sophisticated and concerning tactics. Notably, the threat actor exploited legitimate drivers for defense evasion, abused Group Policy Objects (GPO) to facilitate domain-wide compromise, and deployed custom malicious tools designed to disable security solutions present in the environment.
Read more…
Source: Trend Micro
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Report Ties North Korean Attacks to New Malware, Linked by Word Macros
October 1, 2018
Newly discovered malware from the world of cyberespionage connects the dots between the tools and operations of the little-known Reaper group believed to act on behalf of the North Korean government. The latest findings indicate that the remote access Trojans (RAT) in the KONNI and DOGCALL families are the work of the same operator, tasked with ...
- An insider view of a cybersecurity training workshop for employees of Europe’s transmission system operators.
October 1, 2018
After the hackers had stealthily accessed the SCADA system and blew the transformer with a loud bang, the defenceless employees had no option but to remove the control plugs and manually turn the machine back on. “That’s what they had to do in Ukraine,” said Michael John, Director of Operations at the European Network for Cybersecurity (ENCS), referring to the world’s ...
- Cybersecurity Researchers Spotted First-Ever UEFI Rootkit in the Wild
September 27, 2018
Cybersecurity researchers at ESET have unveiled what they claim to be the first-ever UEFI rootkit being used in the wild, allowing hackers to implant persistent malware on the targeted computers that could survive a complete hard-drive wipe. Dubbed LoJax, the UEFI rootkit is part of a malware campaign conducted by the infamous Sednit group, also known as ...
- Cobalt threat group serves up SpicyOmelette in fresh bank attacks
September 27, 2018
Advanced persistent threat group (APT) the Cobalt Gang, also known as Gold Kingswood, is spreading SpicyOmelette malware in campaigns targeting financial institutions worldwide. In a world where cyberattacks against businesses and consumers alike are spreading and evolving in nature and sophistication, it is often financial institutions which bear the brunt. Banking customers hoodwinked by fraudulent schemes or ...
- VPNFilter’s Arsenal Expands With Newly Discovered Modules
September 26, 2018
Seven new modules discovered in VPNFilter further fill in the blanks about how the malware operates and reveals a wider breath of capabilities. Researchers have discovered new modules in VPNFilter – the malware behind the widespread campaign in May that infected 75 router brands – revealing that its capabilities are much more widespread and sophisticated than previously thought. After ...
- New Linux Kernel Bug Affects Red Hat, CentOS, and Debian Distributions
September 26, 2018
Security researchers have published the details and proof-of-concept (PoC) exploits of an integer overflow vulnerability in the Linux kernel that could allow an unprivileged user to gain superuser access to the targeted system. The vulnerability, discovered by cloud-based security and compliance solutions provider Qualys, which has been dubbed “Mutagen Astronomy,” affects the kernel versions released between ...