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

Backdoor:Linux/Gafgyt.AI!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Backdoor:Linux/Gafgyt.AI!MTB
Classification:
Type:Backdoor
Platform:Linux
Family:Gafgyt
Detection Type:Concrete
Known malware family with identified signatures
Variant:AI
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 Gafgyt

Summary:

This is a critical Linux-based Gafgyt botnet variant, identified through concrete signatures and behavioral analysis. It establishes a backdoor, communicates with a hardcoded command-and-control server (64.225.125.105:6969), and possesses capabilities to launch various Distributed Denial of Service (DDoS) attacks, including UDP floods and HTTP STOMP.

Severity:
Critical
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Backdoor_Linux_Gafgyt_AI_2147767628_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Backdoor:Linux/Gafgyt.AI!MTB"
        threat_id = "2147767628"
        type = "Backdoor"
        platform = "Linux: Linux platform"
        family = "Gafgyt"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
        threshold = "5"
        strings_accuracy = "High"
    strings:
        $x_1_1 = "SendHTTPHex" ascii //weight: 1
        $x_1_2 = "udpfl00d" ascii //weight: 1
        $x_1_3 = "OVHKILL" ascii //weight: 1
        $x_1_4 = "NFOKILL" ascii //weight: 1
        $x_1_5 = "HTTPSTOMP" ascii //weight: 1
        $x_2_6 = "64.225.125.105:6969" ascii //weight: 2
        $x_2_7 = "vseattack" ascii //weight: 2
        $x_2_8 = "Self Rep Fucking NeTiS and Thisity 0n Ur FuCkInG FoReHeAd We BiG L33T HaxErS" ascii //weight: 2
    condition:
        (filesize < 20MB) and
        (
            ((5 of ($x_1_*))) or
            ((1 of ($x_2_*) and 3 of ($x_1_*))) or
            ((2 of ($x_2_*) and 1 of ($x_1_*))) or
            ((3 of ($x_2_*))) or
            (all of ($x*))
        )
}
Known malware which is associated with this threat:
Filename: frost.arm7
c1c4f1c5aac0226e55dc5a531b7a5072a387ddcb0366278f719aa44701e22435
04/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the compromised Linux system, remove the detected malware, and block the identified C2 IP address (64.225.125.105) at the network perimeter. Conduct a full forensic analysis to identify persistence mechanisms, lateral movement, and other potentially compromised systems. Ensure all Linux systems are fully patched and secure.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 03/01/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊