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

Backdoor:Linux/Gafgyt.AZ!xp - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Backdoor:Linux/Gafgyt.AZ!xp
Classification:
Type:Backdoor
Platform:Linux
Family:Gafgyt
Detection Type:Concrete
Known malware family with identified signatures
Variant:AZ
Specific signature variant within the malware family
Suffix:!xp
Confidence:Very High
False-Positive Risk:Low

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

Summary:

Backdoor:Linux/Gafgyt.AZ!xp is a variant of the Gafgyt malware family that targets Linux-based systems, often IoT devices. The malware incorporates the compromised device into a botnet to participate in Distributed Denial-of-Service (DDoS) attacks. It also contains functionality to find and terminate other processes, likely to remove competing malware or security tools.

Severity:
Critical
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Backdoor_Linux_Gafgyt_AZ_2147817555_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Backdoor:Linux/Gafgyt.AZ!xp"
        threat_id = "2147817555"
        type = "Backdoor"
        platform = "Linux: Linux platform"
        family = "Gafgyt"
        severity = "Critical"
        info = "xp: an internal category used to refer to some threats"
        signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
        threshold = "3"
        strings_accuracy = "High"
    strings:
        $x_1_1 = "wkUxzvutsrqp_nm-ihgfFCcba" ascii //weight: 1
        $x_1_2 = "sending kill request" ascii //weight: 1
        $x_1_3 = "[killer] finding and killing processes holding port" ascii //weight: 1
        $x_1_4 = "[attack] starting attack" ascii //weight: 1
        $x_1_5 = "/proc/cpuinfo" ascii //weight: 1
        $x_1_6 = "npxXoudifFeEgGaACScs" ascii //weight: 1
    condition:
        (filesize < 20MB) and
        (3 of ($x*))
}
Known malware which is associated with this threat:
Filename: mirai.x86
38b4560f692a917a8da916e8fa7ed141fe38703b3d6f3a614f7b5d2d37c09eda
10/12/2025
→VirusTotal↓Download Sample
Filename: mirai.mips
964cbc8388c9b95046f986b8618878198adff6932f1e8918f797c105bcca49df
10/12/2025
→VirusTotal↓Download Sample
Filename: mirai.arm
5af18de9965ec5b65164155b5e9af924eb43935bbb002c1e581aa8e9551aaa0f
10/12/2025
→VirusTotal↓Download Sample
Filename: mirai.ppc
798bf0bba7a22707557a27f5fcd7f1717cd12fe4bda53510ed459cfe71cca337
10/12/2025
→VirusTotal↓Download Sample
Filename: mirai.mpsl
6ccb561e2f7e50232add60823f8392547f6313715adf1778616b90e36d6012e7
10/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
1. Isolate the affected Linux device from the network. 2. Identify and remove the malicious file and its persistence mechanisms (e.g., cron jobs, startup scripts). 3. Re-image the device from a known-good backup and change all credentials. 4. Investigate and patch the initial point of compromise, such as weak passwords or unpatched services.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 18/11/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊