user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:Win32/Phorpiex.SX!MTB
Trojan:Win32/Phorpiex.SX!MTB - Windows Defender threat signature analysis

Trojan:Win32/Phorpiex.SX!MTB - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:Win32/Phorpiex.SX!MTB
Classification:
Type:Trojan
Platform:Win32
Family:Phorpiex
Detection Type:Concrete
Known malware family with identified signatures
Variant:SX
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 32-bit Windows platform, family Phorpiex

Summary:

This threat is a Trojan from the Phorpiex botnet family, a worm known for self-propagation and delivering additional malware payloads. The detection, which includes the string 'xmr.exe', indicates the Trojan has likely dropped a Monero cryptocurrency miner, which steals system resources and causes significant performance degradation.

Severity:
Medium
VDM Static Detection:
No specific strings found for this threat
YARA Rule:
rule Trojan_Win32_Phorpiex_SX_2147957801_0
{
    meta:
        author = "threatcheck.sh"
        detection_name = "Trojan:Win32/Phorpiex.SX!MTB"
        threat_id = "2147957801"
        type = "Trojan"
        platform = "Win32: Windows 32-bit platform"
        family = "Phorpiex"
        severity = "Critical"
        info = "MTB: Microsoft Threat Behavior"
        signature_type = "SIGNATURE_TYPE_PEHSTR_EXT"
        threshold = "31"
        strings_accuracy = "Low"
    strings:
        $x_20_1 = {f7 f9 6b d2 0f 52 ff 15 ?? ?? ?? ?? e8 ?? ?? ?? ?? 99 8b cf f7 f9 03 d6}  //weight: 20, accuracy: Low
        $x_10_2 = {53 8d 45 e8 50 ff 75 f8 8d 85 dc fc ff ff 50 ff 75 f0 ff 15 ?? ?? ?? ?? 8d 45 f8 50 68}  //weight: 10, accuracy: Low
        $x_1_3 = "xmr.exe" ascii //weight: 1
    condition:
        (filesize < 20MB) and
        (all of ($x*))
}
Known malware which is associated with this threat:
3bfe06669545cf2b91a149149cc23073d631e237f5aaac237dbe7da67b227477
05/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
1. Isolate the affected machine from the network to prevent lateral movement. 2. Run a full scan with an updated antivirus product to remove all malicious components. 3. Check for persistence mechanisms (e.g., scheduled tasks, registry run keys) and any dropped files like 'xmr.exe'. 4. Change all user and administrative passwords associated with the system.
=== 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:~$ ▊