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

Trojan:Win64/AsyncRat.RPY!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:Win64/AsyncRat.RPY!MTB
Classification:
Type:Trojan
Platform:Win64
Family:AsyncRat
Detection Type:Concrete
Known malware family with identified signatures
Variant:RPY
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 AsyncRat

Summary:

This detection identifies a concrete variant of AsyncRat, a sophisticated Remote Access Trojan (RAT) known as Trojan:Win64/AsyncRat.RPY!MTB. This malware grants attackers comprehensive remote control over the compromised system, enabling data exfiltration, surveillance, and the execution of arbitrary commands. Detection relies on a specific signature match and machine learning behavioral analysis.

Severity:
Critical
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Trojan_Win64_AsyncRat_RPY_2147902278_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:Win64/AsyncRat.RPY!MTB"
        threat_id = "2147902278"
        type = "Trojan"
        platform = "Win64: Windows 64-bit platform"
        family = "AsyncRat"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "1"
        strings_accuracy = "High"
    strings:
        $x_1_1 = {8b c2 c1 c9 08 41 03 c8 8b d3 41 33 c9 c1 ca 08 41 03 d1 41 c1 c0 03 41 33 d2 41 c1 c1 03 44 33 ca 44 33 c1 41 ff c2 41 8b db 44 8b d8 41 83 fa 1b 72 cd}  //weight: 1, accuracy: High
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: donut.exe
518d6457e2d3e20e470f20b6399ce0f0ff5091dc6d2a0826d658247832ff4a8c
09/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the infected system from the network. Conduct a full system scan with updated antivirus software to remove the threat and any associated files. Investigate for persistence mechanisms, lateral movement, and data exfiltration, and reset any compromised user credentials.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 09/01/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊