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C20/100

Malware · high

Citrus ransomware uses VLESS, Sn00py and LLM assistance

Tier C · Keep an eye on it – Check if you’re affected

Who’s exposed: Organizations targeted by Citrus ransomware operators

Tier C because: Hits tech teams

Reach

Attack

Damage

Fix

The Brief

  • Securelist reports on Citrus ransomware, which combines VLESS for network traffic, Sn00py for file encryption, and large language model assistance.
  • The report describes a hybrid approach: established infrastructure techniques, methods for evading network filters, and LLM-powered automation.
  • The sources provided contain no details on victims, versions, CVEs, or patches.

Why it matters

Ransomware that uses VLESS to get past network filters and LLMs to automate parts of the attack can be harder for traditional perimeter defences to detect, so developers and operators should review their network monitoring and ransomware defences.

The checklist behind the tier

Checklist · 1 of 10 yes
YesHits tech teamsJudgment: ransomware encrypts enterprise servers and workstations that ops and IT teams run.
NoCore infrastructureJudgment: a ransomware family is not core infrastructure software that nearly every team runs.
NoPopular toolJudgment: Citrus is a threat actor's malware, not a widely used framework, tool or package.
NoExploited in the wildSecurelist snippet describes Citrus as a threat but does not explicitly report observed attacks.
NoPublic exploitSecurelist snippet does not say exploit code or a proof-of-concept is published.
NoRemote, no loginSecurelist snippet does not describe unauthenticated network access as the infection route.
NoFull takeoverSecurelist snippet does not explicitly state code execution, root or admin rights are obtained.
NoSecrets exposedSecurelist snippet does not report stolen credentials, keys, configs or customer data.
NoSupply chainSecurelist snippet does not report a compromised project, update, pipeline or package.
NoNo fix yetNot a vulnerability with a vendor patch; the sources do not describe a fix status.

Timeline

  1. Securelist publishes analysis of Citrus ransomware

  2. Securelist

    Citrus Ransomware: VLESS for traffic, Sn00py for encryption, and LLMs lending a hand

Source

Citrus Ransomware: VLESS for traffic, Sn00py for encryption, and LLMs lending a hand ↗ Securelist · 2h ago

First seen · 1 source · Full story page · How tiers are decided