user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Backdoor:Linux/Mirai.FV!MTB
Backdoor:Linux/Mirai.FV!MTB - Windows Defender threat signature analysis

Backdoor:Linux/Mirai.FV!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Backdoor:Linux/Mirai.FV!MTB
Classification:
Type:Backdoor
Platform:Linux
Family:Mirai
Detection Type:Concrete
Known malware family with identified signatures
Variant:FV
Specific signature variant within the malware family
Suffix:!MTB
Detected via machine learning and behavioral analysis
Detection Method:Behavioral
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Backdoor - Provides unauthorized remote access for Linux platform, family Mirai

Summary:

This detection identifies a Backdoor:Linux/Mirai.FV!MTB variant, a sophisticated threat primarily targeting Linux-based IoT devices. It acts as a backdoor, establishing persistent access to infected systems and typically enlisting them into a Mirai botnet for large-scale Distributed Denial of Service (DDoS) attacks.

Severity:
Critical
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Backdoor_Linux_Mirai_FV_2147906265_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Backdoor:Linux/Mirai.FV!MTB"
        threat_id = "2147906265"
        type = "Backdoor"
        platform = "Linux: Linux platform"
        family = "Mirai"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
        threshold = "2"
        strings_accuracy = "Low"
    strings:
        $x_1_1 = {20 40 d1 d1 bb 10 20 40 d1 d1 b9 10 20 40 d1 d1 b7 10 20 40 d1 d1 b5 10 52 80 42 81 32 29 00 04 b0 81}  //weight: 1, accuracy: High
        $x_1_2 = {20 6e 00 08 30 10 00 40 00 08 22 6e 00 08 32 80 20 6e 00 08 20 28 00 0c 22 00 22 6e 00 08 20 29 00 08 24 01 94 80 2d 42 ff f8 4a ae ff f8 ?? ?? 20 2e ff f8 b0 ae ff f0 ?? ?? 2d 6e ff f0 ff f8}  //weight: 1, accuracy: Low
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: Aqua.m68k
b81d47a5d54682a4d1f7fffdafab27af2b941fe3949b53addacd047659599457
22/01/2026
→VirusTotal↓Download Sample
Filename: Aqua.m68k
112991b3fd27e609cd7cfb244337c0d0f364d1a8b3bf1539cb535f4059c75af2
20/01/2026
→VirusTotal↓Download Sample
Filename: Aqua.m68k
1ea7a58c3f1dfd9f76a081b872d0d7179a4a02d83fb6732d25c71fb94cb8dc84
20/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the infected Linux device from the network. Change all default or weak credentials, apply all available firmware and software updates, and perform a factory reset or a full system re-image if possible. Implement strong firewall rules and monitor network traffic for outbound connections to command-and-control servers.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 20/01/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊