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

Trojan:MSIL/Crysan.ARAZ!MTB - Windows Defender Threat Analysis

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

Summary:

This threat is a Trojan from the Crysan malware family, a .NET-based application detected by Microsoft's machine learning behavioral analysis (!MTB). Crysan variants are often associated with information stealing or ransomware activities. The detected string 'gine Shielden' suggests the malware uses a commercial obfuscator to hide its malicious code and evade static analysis.

Severity:
Medium
VDM Static Detection:
Relevant strings associated with this threat:
 - gine Shielden v2.4.0.0 (PEHSTR_EXT)
YARA Rule:
rule Trojan_MSIL_Crysan_ARAZ_2147932156_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:MSIL/Crysan.ARAZ!MTB"
        threat_id = "2147932156"
        type = "Trojan"
        platform = "MSIL: .NET intermediate language scripts"
        family = "Crysan"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "2"
        strings_accuracy = "Low"
    strings:
        $x_2_1 = {11 05 11 06 9a 0c 08 12 03 28 ?? ?? ?? 0a 2c 17 06 09 7e ?? ?? ?? 04 61 d1 13 07 12 07 28 ?? ?? ?? 0a 6f ?? ?? ?? 0a 11 06 17 58 13 06 11 06 11 05 8e 69 32 cb}  //weight: 2, accuracy: Low
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
Filename: 80f14abe3016f509071235448f9129e9938b352367402d52dd8c4b0bc4c98e1c
80f14abe3016f509071235448f9129e9938b352367402d52dd8c4b0bc4c98e1c
05/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Isolate the affected host from the network immediately to prevent lateral movement. Use antivirus software to perform a full system scan and remove the threat. After removal, change all user and system passwords for accounts on the machine and investigate the initial infection vector.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 05/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊