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

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

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Backdoor:Linux/Mirai.DC!MTB
Classification:
Type:Backdoor
Platform:Linux
Family:Mirai
Detection Type:Concrete
Known malware family with identified signatures
Variant:DC
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 Linux system compromised by a Mirai variant, specifically Mirai.DC. This malware functions as a backdoor, granting unauthorized access to the system and enlisting it into a botnet to launch potent Distributed Denial of Service (DDoS) attacks, as indicated by embedded strings like "attack_tcp.c" and "flood_tcp_ack". The !MTB suffix confirms that machine learning behavioral analysis strongly corroborated this malicious activity.

Severity:
Critical
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Backdoor_Linux_Mirai_DC_2147833473_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Backdoor:Linux/Mirai.DC!MTB"
        threat_id = "2147833473"
        type = "Backdoor"
        platform = "Linux: Linux platform"
        family = "Mirai"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
        threshold = "4"
        strings_accuracy = "High"
    strings:
        $x_1_1 = "attack_tcp.c" ascii //weight: 1
        $x_1_2 = "chacha20_quarterround" ascii //weight: 1
        $x_1_3 = "attack_udp.c" ascii //weight: 1
        $x_1_4 = "mylock" ascii //weight: 1
        $x_1_5 = "flood_tcp_ack" ascii //weight: 1
    condition:
        (filesize < 20MB) and
        (4 of ($x*))
}
Known malware which is associated with this threat:
Filename: arm7
cad1cd3550643999fb362df6559bfa167d3797bc829ec93f91bf27e0ffa5e99d
08/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected Linux system from the network. Eradicate the Mirai malware using trusted security tools, then apply all critical security patches and update default or weak credentials. Implement strict firewall rules and network segmentation to block C2 communication and outbound DDoS traffic, and continuously monitor for any signs of reinfection or persistent unauthorized access.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 08/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊