user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:WinNT/Fetrog.A
Trojan:WinNT/Fetrog.A - Windows Defender threat signature analysis

Trojan:WinNT/Fetrog.A - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:WinNT/Fetrog.A
Classification:
Type:Trojan
Platform:WinNT
Family:Fetrog
Detection Type:Concrete
Known malware family with identified signatures
Variant:A
Specific signature variant within the malware family
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Trojan - Appears legitimate but performs malicious actions for WinNT platform, family Fetrog

Summary:

Trojan:WinNT/Fetrog.A is a concrete detection for a Windows NT-based Trojan from the Fetrog family. This malware typically aims to gain unauthorized access, steal data, or facilitate further compromise, indicated by specific file names like 'f3t_0g.dat' and device interaction strings such as '\DosDevices\rmpdk0g'.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - HcA (PEHSTR_EXT)
YARA Rule:
rule Trojan_WinNT_Fetrog_A_2147666039_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:WinNT/Fetrog.A"
        threat_id = "2147666039"
        type = "Trojan"
        platform = "WinNT: WinNT"
        family = "Fetrog"
        severity = "Critical"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "2"
        strings_accuracy = "High"
    strings:
        $x_2_1 = {48 8b f9 48 03 fa 48 33 c0 8a 01 41 f6 e0 49 03 c1 88 01 48 33 c0 48 ff c1 48 3b cf 75 eb}  //weight: 2, accuracy: High
        $x_2_2 = {80 39 eb 75 0c 48 0f be 41 01 48 8d 4c 08 02 eb 0e 80 39 e9 75 0e 48 63 41 01 48 8d 4c 08 05 b0 01 48 89 0a}  //weight: 2, accuracy: High
        $x_1_3 = "Net_U1ocike._2k" wide //weight: 1
        $x_1_4 = "f3t_0g.dat" wide //weight: 1
        $x_1_5 = "\\DosDevices\\rmpdk0g" wide //weight: 1
    condition:
        (filesize < 20MB) and
        (
            ((2 of ($x_1_*))) or
            ((1 of ($x_2_*))) or
            (all of ($x*))
        )
}
Known malware which is associated with this threat:
441f2a6775621af8c5d1ead7082e9573ad878bc90675ed55f86abfc8a9e8cc6f
22/03/2026
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected system from the network. Perform a full system scan with updated antivirus software and remove all detected malicious files. Review system logs for signs of further compromise or persistence mechanisms, and ensure all operating system and software vulnerabilities are patched.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 22/03/2026. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊