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

DDoS:Linux/Gafgyt.YA!MTB - Windows Defender Threat Analysis

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

Summary:

This threat is a variant of the Gafgyt malware, which targets Linux-based systems and IoT devices. It spreads by exploiting weak or default credentials, incorporating the compromised device into a botnet. The botnet is then used to conduct Distributed Denial of Service (DDoS) attacks.

Severity:
Medium
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule DDoS_Linux_Gafgyt_YA_2147741748_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "DDoS:Linux/Gafgyt.YA!MTB"
        threat_id = "2147741748"
        type = "DDoS"
        platform = "Linux: Linux platform"
        family = "Gafgyt"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
        threshold = "2"
        strings_accuracy = "Low"
    strings:
        $x_1_1 = {3c 4e 65 77 53 74 61 74 75 73 55 52 4c 3e 24 28 2f 62 69 6e 2f 62 75 73 79 62 6f 78 20 77 67 65 74 20 2d 67 20 [0-3] 2e [0-3] 2e [0-3] 2e}  //weight: 1, accuracy: Low
        $x_1_2 = "POST /ctrlt/DeviceUpgrade_1" ascii //weight: 1
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: mpsl
1b6ea2bf9b398b1ac8f2752d267b5ad6ff6b2a01f5ca9cea54d4d9c28375fe70
06/12/2025
→VirusTotal↓Download Sample
Filename: x86_64
53b36043164bb36ecde561c0bba63d781f21c76a07fb05fbc36ec598bf8e62cb
05/12/2025
→VirusTotal↓Download Sample
Filename: arm5
5e63fc81c4bd1f9a445dde009c5ebcbe6f021f2e42dc54f56d3fb1b289ddcdb3
05/12/2025
→VirusTotal↓Download Sample
Filename: arm7
ab477db4fe96fdc52c6d97b5319db16a9aaceb63a316f5e87ad2777944de83ef
05/12/2025
→VirusTotal↓Download Sample
Filename: arm6
fc0fe771434958f87fcdd5300b56dce03bfea8c797603df90ffc04405945510c
05/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Isolate the affected device from the network immediately to prevent participation in DDoS attacks. Ensure the detected file has been removed and change all default or weak passwords on the system. Consider re-imaging the device from a known-good source to ensure complete removal.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 08/11/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊