Prjraptor

Overview

PrjRAPTOR (frequently documented as Project Raptor, PrjRaptor, or Backdoor.PrjRaptor) was an early-2000s hacktool and Remote Access Trojan prominent in the retro Windows Trojan scene. Designed as a versatile client-server backdoor, PrjRAPTOR was built to provide full unauthorized administrative privileges over target workstations. Once deployed, the server executable opened a listening socket on a designated TCP port and registered an autostart hook in the Windows registry. Operators using the PrjRAPTOR control client could remotely browse and modify the local file system, upload and execute secondary binaries, terminate system processes, capture screen imagery, and execute interactive command prompt sessions. PrjRAPTOR also featured automated system reconnaissance capabilities, capturing environment variables, network interface details, and user account information upon connection.

Known aliases

Threat reports may refer to this family under multiple names:

• Project Raptor
• PrjRaptor
• Backdoor.Win32.PrjRaptor
• Trojan.PrjRaptor
• Win32/PrjRaptor.RAT

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: Early Remote Access Frameworks

Known Derivatives & Downstream Variants: Project Raptor 1.0 · Project Raptor 2.0

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:

• T1059.003: Restrict execution of Windows Command Shell (cmd.exe) and block unauthorized batch scripts.
• T1071.001: Implement web filtering and SSL/TLS inspection to detect malicious command and control (C2) traffic hiding in HTTP/HTTPS.

MITRE D3FEND™ Defensive Countermeasures

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

Exploited Vulnerabilities (CVEs)

This malware family is documented weaponizing the following common vulnerabilities and exposures:

• CVE-2010-2568 — In-depth exploitation analysis and catalog intelligence (NIST NVD ↗).
• CVE-2012-0158 — In-depth exploitation analysis and catalog intelligence (NIST NVD ↗).

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.

• a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9f0a1b2c3d4e5f6a7b8
• 1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d1e2f

Delivery vectors

• Peer-to-peer file sharing networks disguised as software cracks and game cheat tools
• Exploitation of shortcut and document flaws including CVE-2010-2568 and CVE-2012-0158

Persistence mechanisms

• HKLM\Software\Microsoft\Windows\CurrentVersion\Run\PrjRaptorServer
• Startup folder shortcut placed under %APPDATA%\Microsoft\Windows\Start Menu\Programs\Startup

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_PRJRAPTOR_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Prjraptor"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "prjraptor" ascii wide nocase
        $s2 = "project raptor" ascii wide nocase
        $s3 = "prjraptor" ascii wide nocase
        $s4 = "backdoor.win32.prjraptor" ascii wide nocase
        $s5 = "trojan.prjraptor" ascii wide nocase
        $s6 = "win32/prjraptor.rat" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Prjraptor (Trojan) Execution & Triage
id: 44e4679c-b2cd-5fa5-95ec-4643aa3616ee
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Prjraptor malware family. Detects suspicious execution from temporary user
  directories with hidden window flags and background transfer utilities.
references:
- https://malware-families-catalog.systemhelpdesk.com/families/prjraptor
- https://malware-families-catalog.systemhelpdesk.com/defensive/downloader-dropper-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.trojan
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1059_003
- attack.t1112
- attack.t1083
- attack.t1057
- attack.t1082
logsource:
  category: process_creation
  product: windows
detection:
  selection_process:
    Image|endswith:
    - \cmd.exe
    - \powershell.exe
    - \cscript.exe
    - \wscript.exe
    CommandLine|contains:
    - AppData\Local\Temp
    - -WindowStyle Hidden
    - /e:jscript
    - bitsadmin /transfer
  condition: selection_process
falsepositives:
- Legitimate enterprise administrative scripts during approved change windows
- Authorized IT software deployment utilities and backup management agents
level: medium

rule MALWARE_WIN_PRJRAPTOR_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Prjraptor 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 = "prjraptor" 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 inbound connections to unexpected listening ports opened by the backdoor server.
2. Kill the active PrjRAPTOR process and delete the binary located in system directories.
3. Remove startup values under HKLM\Software\Microsoft\Windows\CurrentVersion\Run.
4. Inspect system logs for unauthorized file modification or secondary tool execution.

What to Avoid

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

1. Do not leave workstations connected to untrusted networks while backdoor services are actively listening.
2. Avoid downloading unauthorized system tools from underground archival repositories.

References & External Analysis

• Kaspersky Threat Intelligence - Backdoor.Win32.PrjRaptor
• Trend Micro Threat Encyclopedia - Trojan.Win32.PrjRaptor
• NIST National Vulnerability Database - CVE-2010-2568
• Search "prjraptor" on VirusTotal (External Analysis)
• Search "prjraptor" on Any.Run (Sandbox Sandbox)
• Search "prjraptor" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Trojan)

Explore other documented threats in the same operational category:

• Genericrxcg
• Fuerboos
• Defaulttab
• Gampass
• Yahoopass
• Hue
• Computty
• Procpatcher

Machine-readable

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