user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:MSIL/NjRat.ABUA!MTB
Trojan:MSIL/NjRat.ABUA!MTB - Windows Defender threat signature analysis

Trojan:MSIL/NjRat.ABUA!MTB - Windows Defender Threat Analysis

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

Summary:

This detection identifies a variant of the NjRat Remote Access Trojan (RAT), a well-known malware that allows attackers to gain complete control over an infected system. Its capabilities include stealing data, logging keystrokes, and accessing the webcam and microphone. The '!MTB' suffix indicates this was identified by a machine learning behavioral model, suggesting the file exhibits actions characteristic of this threat.

Severity:
Medium
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Trojan_MSIL_NjRat_ABUA_2147941477_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:MSIL/NjRat.ABUA!MTB"
        threat_id = "2147941477"
        type = "Trojan"
        platform = "MSIL: .NET intermediate language scripts"
        family = "NjRat"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "5"
        strings_accuracy = "Low"
    strings:
        $x_5_1 = {fe 0c 03 00 fe 0c 02 00 9a fe 0e 01 00 fe 0c 00 00 fe 0c 01 00 20 02 00 00 00 28 ?? 00 00 0a 28 ?? 00 00 0a 28 ?? 00 00 0a 28 ?? 00 00 0a fe 0e 00 00 fe 0c 02 00 20 01 00 00 00 d6 fe 0e 02 00 fe 0c 02 00 fe 0c 03 00 8e b7 3f ?? ff ff ff fe 0c 00 00 28 ?? 00 00 0a 28 ?? 00 00 0a 6f ?? 00 00 0a 14 14 6f ?? 00 00 0a 26 2a}  //weight: 5, accuracy: Low
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: 894356261240CA83D917CD5A1254076B.exe
5bc0dcb006307b8c5475a301c3396feed74941d577c33cb65aa8a0ae3bbccf81
21/11/2025
→VirusTotal↓Download Sample
Remediation Steps:
Isolate the affected machine from the network immediately. Use Windows Defender to perform a full scan and ensure the threat is removed. Due to the risk of full system compromise from this RAT, consider re-imaging the device and resetting all user credentials that were used on it.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 21/11/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊