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Mallory pivots from this family to the IOCs, detections, and named campaigns that touch your stack, and pages you when something new lands.
1 CVE Mallory has correlated with this family across public research and vendor advisories. Each row links to the full Mallory page for that vulnerability.
In early December the Cybersecurity and Infrastructure Security Agency and German authorities warned of a directory traversal vulnerability in Zyxel firewalls being exploited to deploy Helldown ransomware.
4 distinct techniques documented for this family, organized by ATT&CK tactic.
7 indicators attributed across vendor reports, sandbox runs, and researcher write-ups. Full values are available in Mallory.
File hashes (MD5, SHA-1, SHA-256) from samples and reports.
5 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Ransomware deployed via exploitation of a Zyxel firewall directory traversal vulnerability.
Ransomware family observed expanding capabilities to encrypt Linux systems.
Ransomware used in rapid intrusions against European SMEs, including direct encryption of ESXi virtual disk images. The campaign used SSL VPN access via Zyxel firewalls, malware-less lateral movement over RDP, credential harvesting from Veeam configuration data, and distinct Windows and ESXi locker components across campaign waves.
Helldown is described as a ransomware family, specifically a new variant targeting Linux systems.
Match every observed IP, domain, and hash against your live telemetry.
Named campaigns wielding this family, with evidence pinned to each claim.
CVEs this family uses for access and lateral movement.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Every documented technique, ranked by evidence weight.
Reddit, Mastodon, and CTI community discussion around this family.