TF-MAL-elf.umbreon

Description

ThreatFox malware family `elf.umbreon`. Printable name: Umbreon. Aliases: Espeon.

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

• Umbreon, Software S0221 | MITRE ATT&CK®
  web:attack.mitre.org

  A Linux rootkit that provides backdoor access and hides from defenders.

  2026-05-22 05:24 UTC
• NOBELIUM Malware Family: Overview, Variants, and Mitigation
  web:hunt.io

  Explore the NOBELIUM malware family , its known variants like SUNBURST and FoggyWeb, targeted sectors, associated threat actors, and effective mitigation strategies.

  2026-05-22 05:24 UTC
• Remediate vulnerabilities with Microsoft Defender Vulnerability ...
  web:learn.microsoft.com

  Remediate security weaknesses discovered through security recommendations, and create exceptions if needed, in Defender Vulnerability Management.

  2026-05-22 05:24 UTC
• Umbreon (Malware Family) - Fraunhofer
  web:malpedia.caad.fkie.fraunhofer.de

  Details for the Umbreon malware family including references, samples and yara signatures.

  2026-05-22 05:24 UTC
• RESURGE Malware and CVE-2025-0282: Critical Threats and Defender ...
  web:windowsforum.com

  The emergence of RESURGE signals more than just another entry in a long line of malware threats. According to CISA, RESURGE contains advanced persistence features inherited from the SPAWNCHIMERA malware family—a group notorious for its ability to survive system reboots and avoid simplistic remediation .

  2026-05-22 05:24 UTC
• Malware Incident Response: The 7-Step Playbook for 2025 - Breachsense
  web:www.breachsense.com

  Complete malware remediation now requires addressing both the infected endpoint and the stolen authentication data. Your malware incident response playbook must account for both.

  2026-05-22 05:24 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 05:24 UTC
• A hierarchical deep learning framework with doubly regularized loss for ...
  web:www.nature.com

  This study proposes a hierarchical deep learning framework for Portable Executable (PE) malware detection and family categorization, underpinned by a novel Doubly Regularized Binary Cross-Entropy ...

  2026-05-22 05:24 UTC
• Mitigating malware and ransomware attacks - The National Cyber Security ...
  web:www.ncsc.gov.uk

  This guidance helps private and public sector organisations deal with the effects of malware (which includes ransomware). It provides actions to help organisations prevent a malware infection, and also steps to take if you're already infected. Following this guidance will reduce: the likelihood of becoming infected the spread of malware throughout your organisation the impact of the infection

  2026-05-22 05:24 UTC
• Umbreon Rootkit Being Distributed via Manual Installs
  web:www.securityweek.com

  Malware & Threats Umbreon Rootkit Being Distributed via Manual Installs A recently analyzed Linux rootkit is being distributed via manual installations and targeting both Intel and ARM platforms, embedded platforms included, and provides attackers with complete control over the compromised devices, Trend Micro researchers warn.

  2026-05-22 05:24 UTC

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