Backdoor:Linux/Mirai.EU!MTB

user@threatcheck.sh ~ threat-analysis

bash

$ analyze-threat Backdoor:Linux/Mirai.EU!MTB

Backdoor:Linux/Mirai.EU!MTB - Windows Defender threat signature analysis

$ cat analysis.txt

=== THREAT ANALYSIS REPORT ===

Threat Name: Backdoor:Linux/Mirai.EU!MTB

Classification:

Type:Backdoor

Platform:Linux

Family:Mirai

Detection Type:Concrete

Known malware family with identified signatures

Variant:EU

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

VDM Static Detection:

No specific strings found for this threat

YARA Rule:

rule Backdoor_Linux_Mirai_EU_2147905483_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Backdoor:Linux/Mirai.EU!MTB"
        threat_id = "2147905483"
        type = "Backdoor"
        platform = "Linux: Linux platform"
        family = "Mirai"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_ELFHSTR_EXT"
        threshold = "2"
        strings_accuracy = "Low"
    strings:
        $x_1_1 = {4b ff fe 6d 3d 60 10 02 3d 20 00 00 80 0b e0 10 39 29 00 00 38 6b e0 10 2f 80 00 00 41 ?? ?? ?? 2f 89 00 00 41 9e 00 0c 7d ?? ?? ?? 4e 80 04 21 80 01 00 14 38 21 00 10 7c 08 03 a6 4e 80 00 20}  //weight: 1, accuracy: Low
        $x_1_2 = {80 09 00 00 38 89 00 04 2f 80 00 00 40 ?? ?? ?? 7c 9d 23 78}  //weight: 1, accuracy: Low
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}

Known malware which is associated with this threat:

Filename: nabppc

eba1d094b75564d87c5aa0e5e84dc9bcd5b7660389daf3cbf57368f35e70db2d

28/01/2026

→VirusTotal ↓Download Sample

Filename: nabppc

f4b93a1e444bb7b7581e6ac874d57ae72d46c8446c4a2cde98027c51b8bd1085

27/01/2026

→VirusTotal ↓Download Sample

Filename: nabppc

7fb27a6651bc2a9d70151f867cc72b7529e024db61e4a713a9618cb1b5e508b2

24/01/2026