
Microsoft Teams Vishing Ransomware: STAC4749 Chaos Attack
STAC4749 dials employees on Teams, pretends to be IT support, and encrypts networks with Chaos ransomware in under 17 hours. 100+ North American orgs hit.
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4 results for “Sophos”

STAC4749 dials employees on Teams, pretends to be IT support, and encrypts networks with Chaos ransomware in under 17 hours. 100+ North American orgs hit.

AI-built ransomware toolkit using Claude Opus 4.5 generated 80+ EDR-evasion modules bypassing Sophos, CrowdStrike, and Defender. Sophos confirmed criminal use.

AI ransomware toolkit with 80 modules evades Sophos, CrowdStrike, and Defender in a confirmed active campaign. TTPs, IOCs, and defenses inside.

CVE-2022-3236 is a critical code injection vulnerability in the User Portal and Webadmin interfaces of Sophos Firewall versions 19.5 MR3 and older. Exploited as a zero-day by a Chinese APT (Storm Cloud / Volt Typhoon cluster), the flaw enabled unauthenticated root-level code execution on internet-facing firewall appliances. Sophos delivered an automatic hotfix but it required manual intervention on restricted networks, leaving many deployments exposed.