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A China-based threat actor known for deploying Medusa ransomware has been linked to the weaponization of a combination of zero-day and N-day vulnerabilities to orchestrate "high-velocity" attacks and break into susceptible internet-facing systems. "The threat actor's high operational tempo and proficiency in identifying exposed perimeter assets have proven successful, with recent intrusions heavily impacting healthcare organizations, as well as those in the education, professional services, and finance sectors in Australia, the United Kingdom, and the United States," the Microsoft Threat Intelligence team said . Attacks mounted by Storm-1175 have also leveraged zero-day exploits, in some cases, before they have been publicly disclosed, as well as recently disclosed vulnerabilities to obtain initial access. Select incidents have involved the threat actor chaining together multiple exploits (e.g., OWASSRF ) for post-compromise activity. Upon...

An Iran-nexus threat actor is suspected to be behind a password-spraying campaign targeting Microsoft 365 environments in Israel and the U.A.E. amid ongoing conflict in the Middle East. The activity, assessed to be ongoing, was carried out in three distinct attack waves that took place on March 3, March 13, and March 23, 2026, per Check Point. "The campaign is primarily focused on Israel and the U.A.E., impacting more than 300 organizations in Israel and over 25 in the U.A.E.," the Israeli cybersecurity company said . "Activity associated with the same actor was also observed against a limited number of targets in Europe, the United States, the United Kingdom, and Saudi Arabia." The campaign is assessed to have targeted the cloud environments of government entities, municipalities, technology, transportation, energy sector organizations, and private-sector companies in the region. Password spraying is a form of brute-force attack where a...

Threat actors associated with Qilin  and Warlock ransomware operations have been observed using the bring your own vulnerable driver ( BYOVD ) technique to silence security tools running on compromised hosts, according to findings from Cisco Talos and Trend Micro. Qilin attacks analyzed by Talos have been found to deploy a malicious DLL named "msimg32.dll," which initiates a multi-stage infection chain to disable endpoint detection and response (EDR) solutions. The DLL, launched via DLL side-loading, is capable of terminating more than 300 EDR drivers from almost every security vendor in the market. "The first stage consists of a PE loader responsible for preparing the execution environment for the EDR killer component," Talos researchers Takahiro Takeda and Holger Unterbrink said . "This secondary payload is embedded within the loader in an encrypted form." The DLL loader implements an array of techniques to evade de...

Germany's Federal Criminal Police Office (aka BKA or the Bundeskriminalamt) has unmasked the real identities of two of the key figures associated with the now-defunct REvil (aka Sodinokibi ) ransomware-as-a-service (RaaS) operation. One of the threat actors, who went by the alias UNKN , functioned as a representative of the group, advertising the ransomware in June 2019 on the XSS cybercrime forum. He has now been identified as Daniil Maksimovich Shchukin , a 31-year-old Russian national. He also went by the online monikers Oneiilk2, Oneillk2, Oneillk22, and GandCrab. The development was reported by independent security journalist Brian Krebs. "From early 2019 at the latest until at least July 2021, the wanted person, in cooperation with other individuals, acted as the leader of one of the largest global ransomware groups, known as GandCrab/REvil," BKA said. "The perpetrators demanded large ransom payments in exchange for decrypting and not leaki...

The latest ThreatsDay Bulletin is basically a cheat sheet for everything breaking on the internet right now. No corporate fluff or boring lectures here, just a quick and honest look at the messy reality of keeping systems safe this week. Things are moving fast. The list includes researchers chaining small bugs together to create massive backdoors, old software flaws coming back to haunt us, and some very clever new tricks that let attackers bypass security logs entirely without leaving a trace. We are also seeing sketchier traffic on the underground and the usual supply chain mess, where one bad piece of code threatens thousands of apps. It is definitely worth a quick scan before you log off for the day, if only to make sure none of this is sitting in your own network. Let's get into it. Pre-auth RCE chain exposed Security Flaws in Progress ShareFile watchTower Labs has disclosed two securi...