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

Trojan:MSIL/Orcusrat.ADT!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:MSIL/Orcusrat.ADT!MTB
Classification:
Type:Trojan
Platform:MSIL
Family:Orcusrat
Detection Type:Concrete
Known malware family with identified signatures
Variant:ADT
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 Orcusrat

Summary:

This detection identifies the Orcus Remote Access Trojan (RAT), a malicious program designed to grant an attacker unauthorized remote control over the infected system. Based on the evidence, its capabilities include spying on the user by taking screenshots, stealing data, and executing remote commands.

Severity:
Medium
VDM Static Detection:
Relevant strings associated with this threat:
 - TakeScreenshot (PEHSTR_EXT)
YARA Rule:
rule Trojan_MSIL_Orcusrat_ADT_2147779931_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:MSIL/Orcusrat.ADT!MTB"
        threat_id = "2147779931"
        type = "Trojan"
        platform = "MSIL: .NET intermediate language scripts"
        family = "Orcusrat"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "15"
        strings_accuracy = "High"
    strings:
        $x_4_1 = "Orcus" ascii //weight: 4
        $x_4_2 = "KillButton_Click" ascii //weight: 4
        $x_4_3 = "get_KeyLoggerService" ascii //weight: 4
        $x_4_4 = "TakeScreenshot" ascii //weight: 4
        $x_4_5 = "_keyboardHookHandle" ascii //weight: 4
        $x_3_6 = "get_IcmpSockets" ascii //weight: 3
        $x_3_7 = "IsATcpAnaylzerRunning" ascii //weight: 3
        $x_3_8 = "set_AntiVMs" ascii //weight: 3
        $x_3_9 = "set_AntiDebugger" ascii //weight: 3
        $x_3_10 = "set_TaskSchedulerTaskName" ascii //weight: 3
    condition:
        (filesize < 20MB) and
        (
            ((5 of ($x_3_*))) or
            ((1 of ($x_4_*) and 4 of ($x_3_*))) or
            ((2 of ($x_4_*) and 3 of ($x_3_*))) or
            ((3 of ($x_4_*) and 1 of ($x_3_*))) or
            ((4 of ($x_4_*))) or
            (all of ($x*))
        )
}
Known malware which is associated with this threat:
2a5dafb98fd56a645d5a43453e6f3e0bcc04176987c851000929773e54b55caf
07/11/2025
→VirusTotal↓Download Sample
Remediation Steps:
Isolate the affected host from the network immediately. Use Windows Defender to quarantine and remove the detected threat. Investigate the initial access vector and scan for persistence mechanisms.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 08/11/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊