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

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

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Backdoor:Linux/Mirai.DR!MTB
Classification:
Type:Backdoor
Platform:Linux
Family:Mirai
Detection Type:Concrete
Known malware family with identified signatures
Variant:DR
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 variant of the Mirai botnet malware, a backdoor specifically targeting Linux systems. Once infected, a device becomes part of a larger botnet used to conduct Distributed Denial-of-Service (DDoS) attacks. The presence of this file indicates a compromised system or that the file is staged for an attack.

Severity:
High
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Backdoor_Linux_Mirai_DR_2147850539_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Backdoor:Linux/Mirai.DR!MTB"
        threat_id = "2147850539"
        type = "Backdoor"
        platform = "Linux: Linux platform"
        family = "Mirai"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
        threshold = "1"
        strings_accuracy = "High"
    strings:
        $x_1_1 = "oob,6-3#+Tjmgltp#MW#23-38#TLT57*#BssofTfaHjw,604-05#+HKWNO/#ojhf#Df`hl*#" ascii //weight: 1
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: armv7l
f8d4b65199ab50701269e3ee39195b5334f3507b16eda661c9a488977636f589
07/12/2025
→VirusTotal↓Download Sample
Filename: i686
cf6b5a6a4a4e74aeccad61bb7e367d816d247c7f0a5f4ddbb7e4c519328843e8
06/12/2025
→VirusTotal↓Download Sample
Filename: armv5l
640b1b5ba4c58f149d995010a81d6970f6239cf1d9e8fb0a27901b14e89e2807
06/12/2025
→VirusTotal↓Download Sample
Filename: powerpc
2c91018d224e5b3abf9339b4cda821e370cb193481fea2a7cf78a44186f5a1e9
06/12/2025
→VirusTotal↓Download Sample
Filename: armv4l
a85c6a42523fb3c3db44bb5765ff4a708974019829e8cdf37b8dabd011545749
06/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected machine from the network. Remove the detected file and perform a full system scan with updated antivirus definitions. If the file is within a WSL instance, investigate that environment for compromise; if it is on a network share, find and investigate the source Linux machine. Change all credentials on affected systems.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 05/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊