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

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

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:MSIL/AgentTesla.CCHS!MTB
Classification:
Type:Trojan
Platform:MSIL
Family:AgentTesla
Detection Type:Concrete
Known malware family with identified signatures
Variant:CCHS
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 detection indicates AgentTesla, a notorious .NET-based information stealer and remote access trojan. It is designed to capture keystrokes, log screen activity, steal credentials from web browsers and email clients, and exfiltrate sensitive system information, posing a significant data breach risk.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - screenLogger (PEHSTR_EXT)
YARA Rule:
rule Trojan_MSIL_AgentTesla_CCHS_2147902336_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:MSIL/AgentTesla.CCHS!MTB"
        threat_id = "2147902336"
        type = "Trojan"
        platform = "MSIL: .NET intermediate language scripts"
        family = "AgentTesla"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "15"
        strings_accuracy = "High"
    strings:
        $x_1_1 = "screenLogger" ascii //weight: 1
        $x_1_2 = "keyLogger" ascii //weight: 1
        $x_1_3 = "OSFullName" wide //weight: 1
        $x_1_4 = "CPU:" wide //weight: 1
        $x_1_5 = "User Name" wide //weight: 1
        $x_1_6 = "SbieDll.dll" wide //weight: 1
        $x_1_7 = "Opera Mail\\Opera Mail" wide //weight: 1
        $x_1_8 = "Software\\TightVNC" wide //weight: 1
        $x_1_9 = "DownloadManager\\Passwords" wide //weight: 1
        $x_1_10 = "hostname|encryptedPassword|encryptedUsername" wide //weight: 1
        $x_1_11 = "Google\\Chrome\\User Data" wide //weight: 1
        $x_1_12 = "Chromium\\User Data" wide //weight: 1
        $x_1_13 = "Mozilla\\icecat" wide //weight: 1
        $x_1_14 = "Elements Browser\\User Data" wide //weight: 1
        $x_1_15 = "Microsoft\\Edge\\User Data" wide //weight: 1
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: 0a523f890c3508b8eca3c13a1f4b6f96.exe
24fe87b1951171c60a79a85bd1edc5da865222b2065c8cd30de6d5dacabb5f85
24/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected system, perform a full malware scan, force a password reset for all potentially compromised credentials, and investigate for lateral movement or data exfiltration. Rebuild the system from a trusted backup.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 24/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊