Blogs and Articles

CloudSEK uncovered MALFEX, a long-running npm supply-chain campaign linked to a single operator, using malicious packages to deploy RATs and credential stealers. Two packages remain installable, including one malicious postinstall that evaded advisories for 14 months.

CloudSEK found an attacker's control panel targeting vast.ai, a GPU rental marketplace. It rents containers beside victims to scan their networks. It reached one unprotected notebook and planted no miners. The panel exposed its own source code.

CloudSEK found 85 malicious npm packages, published in three minutes, likely named to surface in search when developers mistype popular libraries. They give attackers remote command access. The same server hosts a GPU-hijacking panel. No victims confirmed.

CloudSEK researchers uncovered GHAPPIER, a previously unreported loader operation spanning at least 65 public repositories, 73 infected files and 22 accounts. The investigation began with a compromised legitimate npm package whose malicious release carried valid provenance through trusted publishing. The report maps the wider infrastructure, links parts of the activity to the PolinRider campaign, and details indicators, attack flow and defensive actions.

CloudSEK researchers uncovered BigBear 2.0, a global Microsoft 365 phishing-as-a-service operation targeting hundreds of organizations across 40+ countries. The investigation exposed the attacker’s admin panel, affiliate network, phishing infrastructure, and thousands of stolen credentials and session cookies, revealing how modern AiTM attacks can hijack authenticated sessions even after MFA.

The first in CloudSEK's "Caught in 4K" series, where we pull ransomware operations out of the shadows and show exactly how they work. A misconfigured server opened a window straight into an Aurora ransomware operator's playbook: attacker tools, AI-assisted planning, and a look inside the actual negotiation panel where a victims and the operator settled on payment. In partnership with TRM Labs, we traced that payment on-chain, into a wider laundering network moving money across multiple victims. This is what ransomware looks like from the inside.

CloudSEK’s BRIDGEHEAD investigation exposes a 40-package npm typosquatting campaign that abuses WSL to reach Windows hosts and deploy a concealed Rust-based stealer. The malware targets cryptocurrency wallets, browser credentials, cookies and Telegram sessions, while executing largely in memory and using public infrastructure for reconnaissance and exfiltration, making detection and takedown significantly harder.

CloudSEK uncovered a Chinese-speaking threat operator using autonomous AI coding agents to scale cyberattacks, including mass WordPress compromise, cryptocurrency wallet theft, credential harvesting and cryptojacking. The exposed infrastructure also revealed a developing blockchain-based command-and-control system designed to make future operations more resilient to takedowns.

A Dependency Confusion Campaign Against Tinkoff Bank's Private Package Namespace