user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat VirTool:MSIL/Cajan.A!MTB
VirTool:MSIL/Cajan.A!MTB - Windows Defender threat signature analysis

VirTool:MSIL/Cajan.A!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: VirTool:MSIL/Cajan.A!MTB
Classification:
Type:VirTool
Platform:MSIL
Family:Cajan
Detection Type:Concrete
Known malware family with identified signatures
Variant:A
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: Virus Tool - Tool used to create or modify malware for .NET (Microsoft Intermediate Language) platform, family Cajan

Summary:

This threat, VirTool:MSIL/Cajan.A!MTB, is a .NET-based offensive security tool identified through behavioral analysis and concrete strings. It is strongly associated with known privilege escalation frameworks like 'winpeas' and 'SharpByeBear', potentially leveraging exploits like CVE-2019-1405 to gain elevated system privileges.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - winpeas (PEHSTR_EXT)
 - S3cur3Th1sSh1t/SharpByeBear (PEHSTR_EXT)
 - |#d1e49aac-8f56-4280-b9ba-993a6d77406c (NID)
 - }#d1e49aac-8f56-4280-b9ba-993a6d77406c (NID)
 - &|#b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 (NID)
 - &}#b2b3f03d-6a65-4f7b-a9c7-1c7ef74a9ba4 (NID)
 - y*|#56a863a9-875e-4185-98a7-b882c64b5ce5 (NID)
 - y*}#56a863a9-875e-4185-98a7-b882c64b5ce5 (NID)
 - C|#be9ba2d9-53ea-4cdc-84e5-9b1eeee46550 (NID)
 - C}#be9ba2d9-53ea-4cdc-84e5-9b1eeee46550 (NID)
 - L|#3b576869-a4ec-4529-8536-b80a7769e899 (NID)
 - L}#3b576869-a4ec-4529-8536-b80a7769e899 (NID)
 - |#5beb7efe-fd9a-4556-801d-275e5ffc04cc (NID)
 - }#5beb7efe-fd9a-4556-801d-275e5ffc04cc (NID)
 - |#01443614-cd74-433a-b99e-2ecdc07bfc25 (NID)
 - }#01443614-cd74-433a-b99e-2ecdc07bfc25 (NID)
 - |#d3e037e1-3eb8-44c8-a917-57927947596d (NID)
 - }#d3e037e1-3eb8-44c8-a917-57927947596d (NID)
 - |#7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c (NID)
 - }#7674ba52-37eb-4a4f-a9a1-f0f9a1619a2c (NID)
 - |#92e97fa1-2edf-4476-bdd6-9dd0b4dddc7b (NID)
 - }#92e97fa1-2edf-4476-bdd6-9dd0b4dddc7b (NID)
YARA Rule:
rule VirTool_MSIL_Cajan_A_2147760885_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "VirTool:MSIL/Cajan.A!MTB"
        threat_id = "2147760885"
        type = "VirTool"
        platform = "MSIL: .NET intermediate language scripts"
        family = "Cajan"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "3"
        strings_accuracy = "High"
    strings:
        $x_2_1 = "winpeas" ascii //weight: 2
        $x_1_2 = "S3cur3Th1sSh1t/SharpByeBear" ascii //weight: 1
        $x_1_3 = "CVE_2019_1405" ascii //weight: 1
    condition:
        (filesize < 20MB) and
        (
            ((1 of ($x_2_*) and 1 of ($x_1_*))) or
            (all of ($x*))
        )
}
Known malware which is associated with this threat:
Filename: winPEASany_ofs.exe
bdbfb7a35cf48dbaf1de8e6577fd6148a764860cf5eef8083ad1dddc2daf63b7
05/01/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected system to prevent further compromise. Conduct a full forensic investigation to ascertain the initial access vector and the extent of the breach. Eradicate all malicious artifacts, revert any unauthorized changes, and consider re-imaging the system. Enhance endpoint detection and response (EDR) capabilities, implement robust privilege access management (PAM), and ensure timely patching of all systems to mitigate similar future threats.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 05/01/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
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