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

Trojan:Win64/CobaltStrike.T!MTB - Windows Defender Threat Analysis

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

Summary:

This is a concrete detection of a Win64 CobaltStrike Trojan, a sophisticated post-exploitation framework commonly used by threat actors for command and control and lateral movement. The threat leverages advanced techniques including persistence via Run keys and BITS jobs, abuse of Windows Living Off The Land Binaries (mshta, rundll32), system hooking, and obfuscation, indicating a high-confidence compromise by a malicious actor.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - ;t$ r (PEHSTR_EXT)
 - Test.dll (PEHSTR_EXT)
 - \.\PhysicalDrive0 (PEHSTR_EXT)
 - C:\Users\Public (PEHSTR_EXT)
 - Software\Microsoft\Windows\CurrentVersion\Run (PEHSTR_EXT)
 - NewWYDll\NewWYDll\Release\NewWYDll.pdb (PEHSTR_EXT)
 - %s\updater.exe (PEHSTR_EXT)
 - %s\libcurl.dll (PEHSTR_EXT)
 - t$0 (PEHSTR_EXT)
 - TzM (PEHSTR_EXT)
 - t$hL (PEHSTR_EXT)
 - |#TEL (NID)
 - }#TEL (NID)
 - gq|#TEL (NID)
 - gq}#TEL (NID)
 - !#HSTR:IntentBase64 (PEHSTR_EXT)
 - ToBase64String (PEHSTR_EXT)
 - !#HSTR:StringCodeForMshta.A!pli (PEHSTR_EXT)
 - mshta (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.C!pli (PEHSTR_EXT)
 - WH_CBT (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.L!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.O!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRegsvr32.A!pli (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)
YARA Rule:
rule Trojan_Win64_CobaltStrike_T_2147904324_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:Win64/CobaltStrike.T!MTB"
        threat_id = "2147904324"
        type = "Trojan"
        platform = "Win64: Windows 64-bit platform"
        family = "CobaltStrike"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "2"
        strings_accuracy = "Low"
    strings:
        $x_2_1 = {8b 03 03 45 ?? ff 73 fc 50 8b 43 ?? 03 45 fc 50 ff 95 ?? ?? ?? ?? 0f b7 46 ?? 83 c4 ?? ff 45 e4 83 c3 ?? 39 45 e4}  //weight: 2, accuracy: Low
        $x_2_2 = {8b 45 f4 8a 00 88 45 ff 8a 01 0f be 7d ff 88 45 ?? 0f be c0 2b f8 ff 45 f4 80 7d ff}  //weight: 2, accuracy: Low
    condition:
        (filesize < 20MB) and
        (1 of ($x*))
}
Known malware which is associated with this threat:
Filename: autoruns.exe
f2b41e3f4d71315710a8a9f94b9f1f56be0e6d48634d27efe5045a4276e8cc34
07/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the infected system to prevent further spread. Conduct a thorough forensic investigation to identify the initial compromise vector, lateral movement, and any deployed payloads. Remove all identified malicious files and persistence mechanisms. Implement endpoint detection and response (EDR) solutions for continuous monitoring and threat hunting, and consider a full system rebuild if the extent of compromise is unclear.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 07/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
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