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

Trojan:MSIL/AsyncRAT.S!MTB - Windows Defender Threat Analysis

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

Summary:

This detection identifies a variant of AsyncRAT, a sophisticated .NET-based Remote Access Trojan (RAT). It leverages various living-off-the-land binaries (like mshta, regsvr32, rundll32, bitsadmin, PowerShell) and API hooking techniques to establish persistence, evade defenses, and enable remote control, data exfiltration, or further malicious activities on the compromised system.

Severity:
High
VDM Static Detection:
Relevant strings associated with this threat:
 - nnn.exe (PEHSTR_EXT)
 - TournamentTrackerUI.DashBoard.resources (PEHSTR_EXT)
 - FromBase64String (PEHSTR_EXT)
 - !#HSTR:IntentBase64 (PEHSTR_EXT)
 - ToBase64String (PEHSTR_EXT)
 - !#HSTR:StringCodeForMshta.A!pli (PEHSTR_EXT)
 - mshta (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.C!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.L!pli (PEHSTR_EXT)
 - WH_MOUSE (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.O!pli (PEHSTR_EXT)
 - WH_SHELL (PEHSTR_EXT)
 - !#HSTR:StringCodeForRegsvr32.A!pli (PEHSTR_EXT)
 - regsvr32 (PEHSTR_EXT)
 - !#HSTR:StringCodeForRundll32.A!pli (PEHSTR_EXT)
 - rundll32 (PEHSTR_EXT)
 - !#HSTR:StringCodeForBITSJobs.A!pli (PEHSTR_EXT)
 - bitsadmin (PEHSTR_EXT)
 - !#HSTR:StringCodeForPowerShell.G!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForScheduledTask.A!pli (PEHSTR_EXT)
 - shch (PEHSTR_EXT)
 - !#HSTR:StringCodeForDataEncoding.D!pli (PEHSTR_EXT)
Known malware which is associated with this threat:
e4ea373bf70b008d51db2d707171a01a40c45e7e01d2ed61eef21199fd30c8dd
21/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the infected host, perform a full endpoint security scan, and remove all detected malicious files. Investigate for established persistence mechanisms (e.g., scheduled tasks, registry modifications) and signs of data exfiltration or lateral movement. Update all system software and reinforce endpoint security controls.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 21/01/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊