user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:Win64/ShellcodeRunner.MK!MTB
Trojan:Win64/ShellcodeRunner.MK!MTB - Windows Defender threat signature analysis

Trojan:Win64/ShellcodeRunner.MK!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:Win64/ShellcodeRunner.MK!MTB
Classification:
Type:Trojan
Platform:Win64
Family:ShellcodeRunner
Detection Type:Concrete
Known malware family with identified signatures
Variant:MK
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: Trojan - Appears legitimate but performs malicious actions for 64-bit Windows platform, family ShellcodeRunner

Summary:

Trojan:Win64/ShellcodeRunner.MK!MTB is a trojan designed to execute arbitrary shellcode on 64-bit Windows systems. This type of malware often acts as a stager, allowing an attacker to download and run more advanced payloads like ransomware or remote access trojans. The detection is based on machine learning behavioral analysis, indicating suspicious code execution patterns.

Severity:
Medium
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Trojan_Win64_ShellcodeRunner_MK_2147955284_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:Win64/ShellcodeRunner.MK!MTB"
        threat_id = "2147955284"
        type = "Trojan"
        platform = "Win64: Windows 64-bit platform"
        family = "ShellcodeRunner"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "25"
        strings_accuracy = "Low"
    strings:
        $x_15_1 = {48 89 44 24 68 48 89 5c 24 70 0f b6 73 08 66 90 40 f6 c6 04 ?? ?? 48 8d 05 16 38 3e 00 bb 21 00 00 00 ?? ?? ?? ?? ?? 48 8b 44 24 68 48 8b 5c 24 70}  //weight: 15, accuracy: Low
        $x_10_2 = {48 89 5c 24 38 48 89 44 24 30 48 8d 05 7b 6a 34 00 ?? ?? ?? ?? ?? 48 89 44 24 18 48 8b 5c 24 30 48 8b 4c 24 38}  //weight: 10, accuracy: Low
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: SecuriteInfo.com.Win64.Evo-gen.49255384
072333ce09b199d45b08e799eb28d8b1a2940f4afd97083ca12d4b2573a6922c
03/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected endpoint from the network to prevent lateral movement. Use antivirus software to quarantine or remove the detected file, then perform a full system scan. Investigate the initial point of compromise and consider resetting user credentials.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 03/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊