TF-MAL-elf.helldown

Description

ThreatFox malware family `elf.helldown`. Printable name: HellDown.

Indicators of Compromise (1)

Each indicator is enriched from the IOC database, threat-intel feed corroboration (Threat Hunt) and VirusTotal. Click one to expand.

References (1)

• ThreatFox: IOCs for this family ThreatFox Malwares

• Data Encrypted for Impact, Technique T1486 - MITRE ATT&CK®
  web:attack.mitre.org

  To maximize impact on the target organization, malware designed for encrypting data may have worm-like features to propagate across a network by leveraging other attack techniques like Valid Accounts, OS Credential Dumping, and SMB/Windows Admin Shares.

  2026-05-22 02:08 UTC
• Helldown Ransomware: an overview of this emerging threat
  web:blog.sekoia.io

  Helldown is a notably active new intrusion set, as shown by its large number of victims. Available data indicates that the group mainly targets Zyxel firewalls by exploiting an undocumented vulnerabilities.

  2026-05-22 02:08 UTC
• Helldown Ransomware Exploiting Zyxel Devices Using Zero-Day Vulnerability
  web:cybersecuritynews.com

  A new ransomware threat dubbed " Helldown " has emerged, actively exploiting vulnerabilities in Zyxel firewall devices to breach corporate networks. Cybersecurity researchers have uncovered evidence linking the Helldown ransomware group to a series of attacks targeting Zyxel firewalls, particularly those using IPSec VPN for remote access.

  2026-05-22 02:08 UTC
• HellDown (Malware Family)
  web:malpedia.caad.fkie.fraunhofer.de

  Helldown Ransomware Malware Analysis Report HellDown 2024-11-22 ⋅ Medium (@lcam) ⋅ Luca Mella How to target European SME with Ransomware? Through Zyxel! HellDown Babuk 2024-10-31 ⋅ Twitter (@nextronresearch) ⋅ Nextron Systems Tweet about discovery of HellDown ransomware HellDown

  2026-05-22 02:08 UTC
• Emulating the Hellish Helldown Ransomware - AttackIQ
  web:www.attackiq.com

  Files matching an extension list are identified and encrypted in place using similar encryption algorithms as used by Helldown ransomware. Detection and Mitigation Opportunities Given the number of different techniques being utilized by this threat, it can be difficult to know which to prioritize for prevention and detection opportunities.

  2026-05-22 02:08 UTC
• Technical Approaches to Uncovering and Remediating Malicious ... - CISA
  web:www.cisa.gov

  It highlights technical approaches to uncovering malicious activity and includes mitigation steps according to best practices. The purpose of this report is to enhance incident response among partners and network administrators along with serving as a playbook for incident investigation.

  2026-05-22 02:08 UTC
• Helldown Ransomware Malware Technical Analysis Report | ThreatMon End ...
  web:www.linkedin.com

  🚨 New Report Alert: Helldown Ransomware Technical & Malware Analysis 🚨 We are excited to announce the release of our in-depth technical and malware analysis report on Helldown Ransomware ...

  2026-05-22 02:08 UTC
• Mitigating malware and ransomware attacks - The National Cyber Security ...
  web:www.ncsc.gov.uk

  How to defend organisations against malware or ransomware attacks.

  2026-05-22 02:08 UTC
• Helldown - RansomLook
  web:www.ransomlook.io

  Helldown is an emerging ransomware group first identified in August 2024, known for its fast-evolving and cross-platform threat capabilities. It exploits critical vulnerabilities—most notably CVE-2024-42057 in Zyxel firewalls—for initial access and demonstrates modular design and anti-detection mechanisms.

  2026-05-22 02:08 UTC
• Helldown Ransomware - A New Emerging Ransomware Threat
  web:www.truesec.com

  Helldown Ransomware targets diverse sectors, from museums to network giants like Zyxel. Read more about this emerging ransomware threat.

  2026-05-22 02:08 UTC

Only Available for Registered Users. Sign in to view.