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

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

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Backdoor:Linux/Mirai.EH!MTB
Classification:
Type:Backdoor
Platform:Linux
Family:Mirai
Detection Type:Concrete
Known malware family with identified signatures
Variant:EH
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 is a concrete detection of a Mirai botnet variant (EH) targeting Linux systems. It functions as a backdoor, allowing remote attackers to control the compromised device and likely enroll it into a botnet for further malicious activities such as Distributed Denial of Service (DDoS) attacks. The detection is strengthened by both specific code patterns and machine learning behavioral analysis.

Severity:
Critical
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Backdoor_Linux_Mirai_EH_2147901966_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Backdoor:Linux/Mirai.EH!MTB"
        threat_id = "2147901966"
        type = "Backdoor"
        platform = "Linux: Linux platform"
        family = "Mirai"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
        threshold = "3"
        strings_accuracy = "High"
    strings:
        $x_1_1 = {48 83 fa 20 48 89 d1 49 89 fa fc 76 53 48 89 f8 48 f7 d8 48 83 e0 07 48 29 c1 48 91 f3 a4 48 89 c1 48 83 e9 20 78 35 66 66 90 66 66 90 66 66 90 48 83 e9 20 48 8b 06 48 8b 56 08 4c 8b 46 10 4c 8b 4e 18 48 89 07 48 89 57 08 4c 89 47 10 4c 89 4f 18 48 8d 76 20 48 8d 7f 20 79 d4 48 83 c1 20 f3 a4 4c 89 d0 c3 90 90 45 31 c0 48 85 ff 41 ba 01 00 00 00 75 61 eb 76 48 0f be 07 4c 8b 0d b5 18 10 00 41 f6 04 41 08 74 64 31 d2 eb 15 6b d2 0a 0f be c1 8d 54 02 d0 81 fa ff 00 00 00 7f 4e 48 ff c7}  //weight: 1, accuracy: High
        $x_1_2 = {53 b8 64 00 00 00 0f 05 48 3d 00 f0 ff ff 48 89 c3 76 0f e8 6c d5 ff ff 89 da 48 83 cb ff f7 da 89 10 48 89 d8 5b c3}  //weight: 1, accuracy: High
        $x_1_3 = {48 8d 3c 28 48 89 c3 e8 b9 02 00 00 85 c0 79 04 48 83 cb ff 5a 48 89 d8 5b 5d c3}  //weight: 1, accuracy: High
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: cosmic.x86_64
fb9192c081c86d098cde51ab9a29ce0e859ffc093c491281cbc223172b69c8bc
25/01/2026
→VirusTotal↓Download Sample
Filename: cosmic.x86_64
855477132b0e716426db7b8aa1ee0a9663f721d5f38efcd08bf55252a3691673
25/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the compromised Linux system to prevent further infection and botnet activity. Identify and remove the detected Mirai backdoor executable. Patch all system vulnerabilities, change default/weak credentials, and implement strong network segmentation and firewall rules to block known Mirai command-and-control (C2) communications.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 25/01/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊