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TF-MAL-elf.kfos

📛 Threat Title

Malware family: kfos

Category: kfos First seen: Last updated: Source: ThreatFox Malwares

Description

ThreatFox malware family `elf.kfos`. Printable name: kfos.

Indicators of Compromise (1)

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

domain elf.kfos VT: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/domains/elf.kfos

IOC database

Type
domain
Value
elf.kfos
First seen
Last seen
Attached to this threat
Appears in
1 threat
Description
Extracted from Threat TF-MAL-elf.kfos

Open the full IOC page →

Threat Hunt — feed corroboration

Not present in any configured threat-intel feed.

Details From VirusTotal

VirusTotal: VT base fetch failed: HTTPError: 429 Client Error: Too Many Requests for url: https://www.virustotal.com/api/v3/domains/elf.kfos

References (1)

Remediations (10)

  • Microsoft Defender Detection Names: What They Mean and What to Do
    web:blog.gridinsoft.com

    Microsoft says its malware and unwanted software names follow the CARO naming scheme. In a typical Defender name, the part before the colon is the type, the part after the colon is the platform, the part after the slash is the family , and a suffix beginning with ! is an internal Microsoft indicator.

  • BPFDoor and Symbiote Rootkits Attacking Linux Systems Exploiting eBPF ...
    web:cybersecuritynews.com

    Two sophisticated Linux rootkits are posing increasingly serious threats to network security by exploiting eBPF technology to hide their presence from traditional detection systems. BPFDoor and Symbiote, both originating from 2021, represent a dangerous class of malware that combines advanced kernel-level access with powerful evasion capabilities.

  • kfos (Malware Family)
    web:malpedia.caad.fkie.fraunhofer.de

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

  • eBPF: A new frontier for malware - Red Canary
    web:redcanary.com

    Extended Berkeley Packet Filter (eBPF) is beginning to transform the Linux malware landscape. Here's what defenders should look out for.

  • 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.

  • 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.

  • New eBPF Filters for Symbiote and BPFdoor Malware
    web:www.fortinet.com

    FortiGuard Labs discovered new Symbiote and BPFDoor variants exploiting eBPF filters to enhance stealth through IPv6 support, UDP traffic, and dynamic port hopping for covert C2 communication.

  • CVE-2026-31431 Copy Fail Explained: IOCs and Patch Guide
    web:www.kodemsecurity.com

    CVE-2026-31431, the Copy Fail Linux kernel LPE, lets authenticated users gain root. See affected kernels, exploit details, IOCs and patches.

  • Mitigating malware and ransomware attacks - The National Cyber Security ...
    web:www.ncsc.gov.uk

    How to defend organisations against malware or ransomware attacks.

  • (PDF) eBPF-based Malware - ResearchGate
    web:www.researchgate.net

    Prevention and detection of eBPF-based malware is also explored, with the goal of providing organizations or legitimate users of eBPF techniques to harden their systems against eBPF-based malware ...

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