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

Trojan:MSIL/AgentTesla.AD!MTB - Windows Defender Threat Analysis

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

Summary:

This is a concrete detection of Trojan:MSIL/AgentTesla.AD!MTB, indicating a highly sophisticated information stealer. The malware employs multiple obfuscation techniques, utilizes system hooking, and leverages networking and cryptography to exfiltrate sensitive data, potentially delivered via social engineering tactics like fake resume or restaurant applications.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - SecureTeam.Attributes.ObfuscatedByAgileDotNetAttribute (PEHSTR_EXT)
 - SmartAssembly.Attributes.PoweredByAttribute (PEHSTR_EXT)
 - SecureTeam.Attributes.ObfuscatedByCliSecureAttribute (PEHSTR_EXT)
 - Xenocode.Client.Attributes.AssemblyAttributes.ProcessedByXenocode (PEHSTR_EXT)
 - CryptoObfuscator.ProtectedWithCryptoObfuscatorAttribute (PEHSTR_EXT)
 - NineRays.Obfuscator.Evaluation (PEHSTR_EXT)
 - System.Net (PEHSTR_EXT)
 - System.Security.Cryptography.AesCryptoServiceProvider (PEHSTR_EXT)
 - hOOWd989DTOHFEOtZr.dVHUYZkf5VVcnHC4cP (PEHSTR_EXT)
 - ResumesApp.Properties.Resources.resources (PEHSTR_EXT)
 - EP1_Restaurante.Properties (PEHSTR_EXT)
 - |#d4f940ab-401b-4efc-aadc-ad5f3c50688a (NID)
 - }#d4f940ab-401b-4efc-aadc-ad5f3c50688a (NID)
 - !#HSTR:StringCodeForMshta.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.C!pli (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)
 - !#HSTR:StringCodeForDataEncoding.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.J!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.K!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteFileCopy.B!pli (PEHSTR_EXT)
 - !#HSTR:ExecutionGuardrails (PEHSTR_EXT)
 - !#HSTR:StringCodeForFileDeletion.A!pli (PEHSTR_EXT)
YARA Rule:
rule Trojan_MSIL_AgentTesla_AD_2147742722_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:MSIL/AgentTesla.AD!MTB"
        threat_id = "2147742722"
        type = "Trojan"
        platform = "MSIL: .NET intermediate language scripts"
        family = "AgentTesla"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "5"
        strings_accuracy = "Low"
    strings:
        $x_5_1 = {02 11 06 11 07 6f ?? 00 00 0a 13 08 03 11 05 6f ?? 00 00 0a 59 13 09 11 05 12 08 28 ?? 00 00 0a 6f ?? 00 00 0a 00 11 09 17 59 25 13 09 16 fe 02 16 fe 01 13 11 11 11 2c 05}  //weight: 5, accuracy: Low
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: Arrival Notice & invoice.exe
86001a3435ac0e6ec179643bfed46e41ac367289869625ae2378537762bfcdb1
09/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected system from the network to prevent further data exfiltration or lateral movement. Ensure Windows Defender or an equivalent endpoint detection and response (EDR) solution is up-to-date and run a full system scan to remove all malicious components. Promptly reset all user account passwords, especially for critical services, and reinforce security awareness training to prevent similar infections.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 09/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊