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March 25, 2025

Troy Hunt: A Sneaky Phish Just Grabbed my Mailchimp Mailing List

You know when you're really jet lagged and really tired and the cogs in your head are just moving that little bit too slow? That's me right now, and the penny has just dropped that a Mailchimp phish has grabbed my credentials, logged into my account and exported the mailing list for this blog. I'm deliberately keeping this post very succinct to ensure the message goes out to my impacted subscribers ASAP, then I'll update the post with more details.

VanHelsing, new RaaS in Town
  • VanHelsingRaaS is a new and rapidly growing ransomware-as-a-service (RaaS) affiliate program launched on March 7, 2025. The RaaS model allows a wide range of participants, from experienced hackers to newcomers, to get involved with a $5,000 deposit. Affiliates keep 80% of the ransom payments, while the core operators earn 20%. The only rule is not to target the Commonwealth of Independent States (CIS).
  • Check Point Research discovered two VanHelsing ransomware variants targeting Windows, but as the RaaS mentions in its advertisement, it provides more offerings “targeting Linux, BSD, ARM, and ESXi systems”. The program provides an intuitive control panel that simplifies operating ransomware attacks. Check Point Research obtained two variants of the VanHelsing Ransomware, compiled just five days apart. The newest variant shows significant updates, highlighting the fast-paced evolution of this ransomware.
  • In less than two weeks since its introduction to the cybercrime community, this ransomware operation has already infected three known victims, demanding large ransom payments for decryption and the deletion of stolen data. During negotiations, they demanded $500,000 to be paid to a specified Bitcoin wallet.
Weaver Ant: Tracking a China-Nexus Cyber Espionage Operation

Sygnia investigates Weaver Ant, a stealthy China-nexus threat actor targeting telecom providers. Learn how web shells enable persistence and espionage.

Chinese hackers spent four years inside Asian telco’s networks

The hackers compromised home routers made by Zyxel to gain entry into a “major” telecommunications company's environment.

VanHelsing Ransomware

orums as part of our Threat Discovery Process.
Designed to target Windows systems, this ransomware employs advanced encryption techniques and appends a unique file extension to compromised files. Its stealthy evasion tactics and persistence mechanisms make detection and removal challenging. This highlights the need for proactive cybersecurity measures and a robust incident response strategy to safeguard data integrity and minimize breach risks.

Target Technologies: Windows
Target Geography: France, USA.
Target Industry: Government, Manufacturing, Pharma.
Encrypted file extension: .vanhelsing
Observed First: 2025-03-16
Threat actor Communication mode: Tor