user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Backdoor:MSIL/XWormRAT.J!MTB
Backdoor:MSIL/XWormRAT.J!MTB - Windows Defender threat signature analysis

Backdoor:MSIL/XWormRAT.J!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Backdoor:MSIL/XWormRAT.J!MTB
Classification:
Type:Backdoor
Platform:MSIL
Family:XWormRAT
Detection Type:Concrete
Known malware family with identified signatures
Variant:J
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 .NET (Microsoft Intermediate Language) platform, family XWormRAT

Summary:

This threat is a specific variant (J) of the XWormRAT family, identified as a backdoor using machine learning behavioral analysis (!MTB). XWormRAT is a sophisticated Remote Access Trojan (RAT) designed to provide attackers with unauthorized remote access and full control over the compromised system, enabling data theft, surveillance, and further malicious activities.

Severity:
Critical
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Backdoor_MSIL_XWormRAT_J_2147904895_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Backdoor:MSIL/XWormRAT.J!MTB"
        threat_id = "2147904895"
        type = "Backdoor"
        platform = "MSIL: .NET intermediate language scripts"
        family = "XWormRAT"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "6"
        strings_accuracy = "Low"
    strings:
        $x_2_1 = {04 20 e8 03 00 00 d8 28}  //weight: 2, accuracy: High
        $x_2_2 = {0a 0b 07 14 73 ?? ?? ?? 0a 20 10 27 00 00 20 98 3a 00 00 6f}  //weight: 2, accuracy: Low
        $x_2_3 = {07 6c 23 00 00 00 00 00 00 d0 41 5b 13 04 12 04 28}  //weight: 2, accuracy: High
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: 7c622d72a82e616159a824854790e747afca0d3b4f596156bc1883f2ecf4ae90
7c622d72a82e616159a824854790e747afca0d3b4f596156bc1883f2ecf4ae90
26/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the infected system from the network. Perform a full system scan with Windows Defender to quarantine and remove the detected malware. Conduct a thorough forensic analysis to determine the extent of compromise, including potential data exfiltration or installation of additional malware, and reset all relevant user and administrative passwords.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 26/01/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊