Meterpreter

Overview

Meterpreter (cataloged across security vendors and threat intelligence databases under detections including HackTool:Win32/Meterpreter, Trojan:Win32/Meterpreter, and Meterpreter) is an advanced, dynamically extensible post-exploitation payload framework originating from the Metasploit Framework. Operating entirely in-memory via reflective DLL injection, Meterpreter leaves zero disk forensic footprints and avoids standard file-based antivirus signatures. It communicates over encrypted TLS/HTTPS or reverse TCP channels, providing remote penetration testers and unauthorized threat actors with comprehensive interactive control over compromised endpoints. Capabilities include memory dump extraction (Mimikatz integration for LSASS), keystroke logging, token manipulation, network route pivoting, process migration into system binaries (such as explorer.exe or svchost.exe), and executing arbitrary in-memory shellcode without spawning child processes.

Known aliases

Threat reports may refer to this family under multiple names:

• HackTool:Win32/Meterpreter
• Trojan:Win32/Meterpreter
• Meterpreter
• Metasploit:Meterpreter

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: Metasploit Framework

Known Derivatives & Downstream Variants: Meterpreter X86 · Meterpreter X64 · Mettle (Posix)

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:

• T1003.001: Monitor for LSASS memory dumping or registry SAM extraction. Enable Credential Guard on Windows systems.
• T1056.001: Implement Endpoint Detection and Response (EDR) to monitor for suspicious API calls related to keystroke interception. Enforce Multi-Factor Authentication (MFA) to render stolen passwords useless.
• 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):

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.

• b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2
• 7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1a2b3c4d5e6f7a8b

Delivery vectors

• meterpreter_stager.exe
• payload_reverse_tcp.bin

Persistence mechanisms

• HKCU\Software\Microsoft\Windows\CurrentVersion\Run\WindowsSecurityUpdate

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_METERPRETER_T1_ARTIFACT {
    meta:
        description = "Tier 1 Primitive Artifact: Raw string matches for Meterpreter"
        tier = "T1 - Primitive Artifact"
        confidence = "Low-Medium (Fast Triage)"
        author = "SystemHelpdesk Threat Research Desk"
        date = "2026-10-14"
    strings:
        $s1 = "meterpreter" ascii wide nocase
        $s2 = "hacktool:win32/meterpreter" ascii wide nocase
        $s3 = "trojan:win32/meterpreter" ascii wide nocase
        $s4 = "meterpreter" ascii wide nocase
        $s5 = "metasploit:meterpreter" ascii wide nocase
    condition:
        uint16(0) == 0x5a4d and any of them
}

title: SystemHelpDesk Detection - Meterpreter (Hacktool) Execution & Triage
id: 43c9e076-01f9-5d57-89e2-402503734968
status: production
description: Detects execution, defense evasion, and persistence behaviors associated
  with the Meterpreter 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/meterpreter
- https://malware-families-catalog.systemhelpdesk.com/defensive/ransomware-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.hacktool
- author.ricky-jordan
- source.systemhelpdesk-mfc
- attack.t1055_001
- attack.t1055_012
- attack.t1059_003
- attack.t1003_001
- attack.t1090
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_METERPRETER_T3_ATTRIBUTION {
    meta:
        description = "Tier 3 Attribution Fingerprint: Heuristic detection for Meterpreter 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 = "meterpreter" 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. Isolate the endpoint immediately to sever the attacker's live, interactive Meterpreter session and halt lateral movement.
2. Do NOT reboot the machine. Capture a live memory image (RAM dump) immediately; because Meterpreter is entirely memory-resident, a reboot destroys all evidence of the payload.
3. Utilize EDR or memory forensics (Volatility) to identify the specific process that was hollowed or injected to host the Meterpreter session.
4. Assume total endpoint compromise; perform a clean OS rebuild and force password resets for all accounts, as credential dumping is a standard post-exploitation step.

What to Avoid

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

1. Do not rely on standard antivirus scans to find the malware; Meterpreter never touches the hard drive and exists only in RAM.
2. Avoid leaving the machine connected to the network while investigating; the attacker has a live shell and can actively disrupt your response.

References & External Analysis

• Metasploit Unleashed - About Meterpreter
• Microsoft Defender Security Intelligence - HackTool:Win32/Meterpreter
• Search "meterpreter" on VirusTotal (External Analysis)
• Search "meterpreter" on Any.Run (Sandbox Sandbox)
• Search "meterpreter" on MalwareBazaar (Malware Samples)

Frequently Asked Questions

Related Threats (Category: Hacktool)

Explore other documented threats in the same operational category:

• Pswtool
• Autoruns
• Cobaltstrike
• Screenconnect
• Dllinject
• Binder
• Bruteforce
• Nettool

Machine-readable

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