Coverage of named threat actors and intrusion sets examines reported incidents, infrastructure, disruption, and defensive guidance.
Search across headline titles and summaries.
Background for this topic.
Coverage under this tag concerns a named threat actor or intrusion set: an individual, group, or organized operation assessed to be responsible for malicious cyber activity. Reports may describe incidents, malware, attack infrastructure, disruption efforts, or analyst assessments. Attribution is often provisional, so actor names and reported links should be treated as intelligence judgments rather than established identity, nationality, sponsorship, or motive.
For defenders, such reporting can help connect incidents and prioritize monitoring, but indicators and techniques may be reused or become obsolete. Validate reported infrastructure, hashes, and behaviors against local telemetry; use confirmed weaknesses to guide vulnerability remediation and access controls. If activity is suspected, preserve relevant logs and evidence, contain affected accounts or systems, and coordinate investigation without relying on an actor label alone.
Threat actors are abusing ChatGPT's content-sharing feature to display fake OpenAI outage pages that direct users to download malware disguised as the ChatGPT desktop application. [...]
An unknown threat actor has been observed using a large language model (LLM) agent to conduct post-compromise actions after obtaining initial access following the exploitation of a publicly-accessible Marimo network using a recently disclosed vulnerability
Threat actors from the Silent Ransom Group, aka Luna Moth, are escalating attacks by impersonating IT staff in phone calls and even showing up in person to gain direct access to victim systems
A previously undocumented threat actor dubbed GREYVIBE has been attributed to ongoing and persistent attacks targeting Ukraine and Ukraine-related entities since at least August 2025
The North Korean state-sponsored threat actor known as Kimsuky (aka Velvet Chollima) has been attributed to a fresh set of cyber attacks targeting South Korean military and corporate entities through March and April 2026
Threat actors are exploiting a critical FortiClient EMS flaw, tracked as CVE-2026-35616, to deploy malware on unpatched systems. Threat actors are exploiting a critical FortiClient EMS vulnerability, tracked as CVE-2026-35616 (CVSS score of 9.1), that allows remote code execution without authentication. Fortinet released fixes in April after confirming zero-day attacks in the wild and urged […]
Microsoft and Resecurity disrupted Fox Tempest, a malware-signing service that used fake Microsoft certificates to make malware look legitimate. Resecurity supported Microsoft’s Digital Crimes Unit (DCU) in its disruption of Fox Tempest, a financially motivated threat actor operating a malware-signing-as-a-service (MSaaS) capability used by cybercriminals to make malicious files appear legitimate. On May 19, 2026, […]
Threat actors are continuing to exploit a critical, now-patched security flaw impacting FortiClient Endpoint Management Server (EMS) deployments to deliver a credential-stealing malware family dubbed EKZ Infostealer
New actor Jinx-0164 hit crypto developers with fake recruiter lures and macOS malware
A new campaign orchestrated by a previously undocumented threat actor has targeted cryptocurrency organizations with an aim to facilitate digital asset theft using recruitment-themed social engineering and bespoke macOS malware
Threat actors are targeting systems with high-performance computers in an ongoing cryptojacking campaign spread through a coordinated SEO poisoning operation that also manipulated AI chatbot recommendations. [...]
CrowdStrike has dismantled the Glassworm botnet in an operation aided by Google and Shadowserver, stripping the operators’ access to infrastructure that helped threat actors infect hundreds of pieces of open-source software with malware since early 2025, the company said Tuesday. The coordinated effort involved the simultaneous takedown of four attacker-controlled servers that were designed to […] The post CrowdStrike disrupts Glassworm botnet that preyed on open-source supply chain appeared first on CyberScoop.
Almost all organizations impersonated by Chinese phishing platforms are non-Chinese entities, suggesting operators deliberately avoid domestic targets
The Indian Computer Emergency Response Team (CERT-In) has issued new guidelines requiring organizations to patch critical security vulnerabilities in internet-exposed systems within 12 hours of being flagged where "feasible" to safeguard against potential threats stemming from threat actors' abuse of artificial intelligence (AI) tools and large language models (LLMs) to automate vulnerability
North Korea-linked Lazarus APT Group is using a stealthy memory-only RAT that leaves almost no forensic traces behind. North Korea-linked APT group Lazarus has never been shy about its ambitions, the threat actor has been tied to some of the most audacious financial heists in recent memory, draining hundreds of millions from cryptocurrency exchanges and […]
The Iranian state-sponsored threat actor known as Nimbus Manticore (aka Screening Serpens and UNC1549) has been attributed to a fresh campaign using lures impersonating organizations in the aviation and software sectors across the U.S., Europe, and the Middle East following the joint U.S.-Israeli military campaign against the country in late February 2026
TrendAI™ Research analyzed an intrusion where threat actors used the EtherHiding technique to route ClearFake payload delivery through smart contracts on the BNB Smart Chain testnet. The attack chain ended with two simultaneously deployed stealers, SectopRAT and ACRStealer alongside an on-chain execution tracker that confirmed each victim compromise in real time.
Attackers are exploiting the patched Ghost CMS flaw CVE-2026-26980, compromising over 700 unpatched sites, including universities. Threat actors are actively exploiting a security flaw, tracked as CVE-2026-26980, in Ghost CMS that was fixed months ago in real attacks against unpatched websites. According to Qianxin, the campaign has already affected more than 700 sites, including well-known organizations and […]
A hacker is selling a 340M-strong OnlyFans-linked dataset built by correlating old breaches and public data, not by hacking OnlyFans directly. A threat actor is adverertising a purported database containing data of 340 million OnlyFans users, but the available evidence points to something less dramatic than a direct breach. According to HackRead, which reported the […]
Threat actors are exploiting a recently disclosed critical security flaw in Ghost CMS to inject malicious JavaScript code with an aim to fuel ClickFix attacks