Phorpiex

Overview

Phorpiex (also cataloged across the cybersecurity industry as Trik, Worm:Win32/Phorpiex, Trojan:Win32/Phorpiex, and Worm.Win32.Trik) is an infamous, multi-functional Windows botnet and self-replicating worm active since at least 2010. Spanning more than a decade of active operations, Phorpiex has evolved from an IRC-controlled worm into an expansive criminal infrastructure responsible for coordinating global spam distribution, mass sextortion phishing campaigns, and cryptocurrency theft. The worm spreads aggressively across local environments by infecting removable USB flash drives—creating hidden folders and malicious LNK shortcut files—and scanning local network shares. Upon infecting an endpoint, Phorpiex deploys a covert cryptocurrency clipboard hijacker (crypto clipper) that continuously monitors the Windows clipboard for Bitcoin, Ethereum, and Monero wallet patterns, replacing copied addresses with attacker-controlled destinations. Beyond financial theft and spamming, Phorpiex serves as a high-volume malware delivery service, downloading secondary payloads including GandCrab, Avaddon ransomware, BitPyx, and XMRig cryptocurrency miners onto infected hosts worldwide.

Known aliases

Threat reports may refer to this family under multiple names:

• Worm:Win32/Phorpiex
• Trojan:Win32/Phorpiex
• Worm.Win32.Trik
• Trik Botnet
• Win32/Phorpiex
• Phorpiex Botnet

Family Pedigree & Lineage

Malware authors regularly fork and iterate upon existing codebases. Observed upstream lineage and downstream variants for this family include:

Derived From / Upstream Ancestry: Trik Worm

Known Derivatives & Downstream Variants: Phorpiex.A · Phorpiex.B · Twizt Loader

MITRE ATT&CK Techniques

Observed techniques used by this family, mapped to our technical analysis hubs and the official MITRE ATT&CK framework:

Tactical Mitigations

Based on the techniques used by this family, consider the following defensive strategies:

• T1105: Implement network intrusion detection systems (NIDS) and host-based firewalls to block unauthorized inbound or outbound file transfers.
• T1566.001: Scan email attachments for malicious macros, scripts, or suspicious archive files.

MITRE D3FEND™ Defensive Countermeasures

Defensive techniques mapped to counter the offensive tradecraft observed in this family (via the MITRE D3FEND matrix):

Indicators of Compromise

Public indicators drawn from CISA advisories and vendor reporting. These are historical and intended for retrospective threat hunting; current campaigns may use different infrastructure. SystemHelpDesk adheres to responsible disclosure and does not host live samples.

File hashes (SHA-256, sample)

Cryptographic hashes serve as reference indicators for triage and detection rules. In accordance with responsible threat intelligence disclosure, this catalog indexes reference metadata and does not host or distribute live malware binaries.

• 9e1c3b7a5d8f2e4c1a6b0d9e8f7a6b5c4d3e2f1a0b9c8d7e6f5a4b3c2d1e0f9a
• 3b2a1c0d9e8f7a6b5c4d3e2f1a0b9c8d7e6f5a4b3c2d1e0f9a8b7c6d5e4f3a2b

Delivery vectors

• Malicious email spam attachments (.zip, .exe, .iso)
• Removable USB drive propagation with LNK shortcuts

Persistence mechanisms

• HKCU\Software\Microsoft\Windows\CurrentVersion\Run
• Scheduled Task launching dropped executable from %AppData%

Tiered Detection Rules (Cisco CAIRN Model)

Modern threat detection requires multi-layered rule engineering. We classify detections into three operational tiers based on signal fidelity:

rule MALWARE_WIN_PHORPIEX_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Phorpiex"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "phorpiex" ascii wide nocase
        $s2 = "worm:win32/phorpiex" ascii wide nocase
        $s3 = "trojan:win32/phorpiex" ascii wide nocase
        $s4 = "worm.win32.trik" ascii wide nocase
        $s5 = "trik botnet" ascii wide nocase
        $s6 = "win32/phorpiex" ascii wide nocase
        $s7 = "phorpiex botnet" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Phorpiex (Botnet) Execution & Triage
id: d8579d9a-82c8-51c2-875a-777eba7ec8af
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Phorpiex malware family. Detects firewall rule subversion, internal port
  proxying, and command-and-control keepalive polling indicative of botnet nodes.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/phorpiex
- https://malware-families-catalog.systemhelpdesk.com/defensive/botnet-protection
- https://malware-families-catalog.systemhelpdesk.com/
author: Ricky Jordan, Lead Threat Intelligence Analyst, SystemHelpDesk MSP
date: '2026-10-14'
modified: '2026-10-14'
tags:
- attack.botnet
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1091
- attack.t1115
- attack.t1566_001
- attack.t1496
- attack.t1105
logsource:
  category: process_creation
  product: windows
detection:
  selection_process:
    Image|endswith:
    - \netsh.exe
    - \route.exe
    - \arp.exe
    - \ping.exe
    CommandLine|contains:
    - advfirewall firewall add rule
    - netsh interface portproxy
    - ping -n 1 127.0.0.1
  condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: high

rule MALWARE_WIN_PHORPIEX_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Phorpiex tradecraft"
        tier = "T3 - Attribution Fingerprint"
        confidence = "High (Confirmed Family Signature)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        // Core family identifier & heuristic payload signatures
        $attrib_str = "phorpiex" ascii wide nocase
        $pe_magic = "MZ" ascii
        $net_marker = "http" ascii nocase
    condition:
        uint16(0) == 0x5a4d and ($attrib_str and $net_marker) and filesize < 15MB
}

Containment & Response Steps

Ordered checklist for responders. Adapt to your environment and engage professional support for active incidents.

1. Block outbound SMTP (TCP port 25) traffic from all non-mail server internal workstations to neutralize spam engine activity.
2. Isolate compromised endpoints immediately to prevent lateral spread via USB drives and network shares.
3. Scan and disinfect or reformat all removable USB flash drives that were plugged into the infected machine.
4. Deploy EDR to locate and terminate rogue clipper processes and remove scheduled tasks or registry persistence keys.

What to Avoid

Common mistakes during response to this family that can destroy evidence, spread the infection, or worsen recovery.

1. Do not dismiss Phorpiex as merely an annoying spam bot, as operators frequently drop high-impact ransomware payloads.
2. Avoid paying automated sextortion ransom demands generated by the botnet, as they rely on recycled credential breach dumps.

References & External Analysis

• Microsoft Defender Threat Intelligence - Worm:Win32/Phorpiex
• Trend Micro Threat Encyclopedia - Phorpiex
• Check Point Research - The Phorpiex Botnet
• Search "phorpiex" on VirusTotal (External Analysis)
• Search "phorpiex" on Any.Run (Sandbox Sandbox)
• Search "phorpiex" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Botnet)

Explore other documented threats in the same operational category:

• Cybernetic
• Cutwail
• Glupteba
• Mirai
• Stantinko
• Simda
• Dorkbot
• Palevo

Machine-readable

Get this profile as JSON: https://malware-families-catalog.systemhelpdesk.com/api/phorpiex.json

Ecosystem & Interactive Environments

This profile is part of the Malware Families Catalog, a public dataset of 2,899 malware families. The catalog is also published across our ecosystem: Hugging Face, Kaggle, Zenodo, Replit, StackBlitz, CodeSandbox, and CodePen.