Mmxmr
Overview
Executive Summary
MMXMR is a specialized malicious cryptocurrency miner (cryptojacking malware) explicitly designed to illicitly mine Monero (XMR). By covertly hijacking the CPU and occasionally GPU resources of infected endpoints, MMXMR generates cryptocurrency for its operators, leading to severe performance degradation, increased power consumption, and hardware wear on the victim's machines.Technical Implementation and Execution
MMXMR is typically distributed via exploit kits targeting unpatched vulnerabilities, disguised as legitimate software updates, or dropped as a secondary payload by initial access trojans. Upon execution, MMXMR focuses on stealth and maximum resource utilization:- Process Injection: It frequently injects its mining payload into legitimate Windows processes (such as `svchost.exe`, `explorer.exe`, or `notepad.exe`) to mask its CPU consumption in the Task Manager.
- Resource Management: Advanced MMXMR variants monitor user activity. If the user opens the Task Manager or starts a resource-intensive application, the miner temporarily pauses or throttles its CPU usage to avoid detection.
- Stratum Protocol: The malware communicates with remote mining pools utilizing the Stratum mining protocol, receiving computational tasks and submitting calculated hashes to generate Monero for the attacker's wallet.
Operational Impact
While MMXMR does not steal data or encrypt files, it causes significant operational disruption. Infected machines suffer from extreme latency, overheating, and frequent crashes. In enterprise environments, widespread cryptojacking infections dramatically increase electricity costs and accelerate hardware degradation.Detection and Remediation
- Performance Monitoring: Utilize endpoint management tools to monitor for sustained, unexplained high CPU usage (often pinned at 90-100%) across multiple endpoints, a hallmark of cryptojacking.
- Network Traffic Analysis: Inspect outbound network traffic for connections utilizing the Stratum protocol or connections to known cryptocurrency mining pools, often occurring over non-standard ports or port 3333.
- Endpoint Detection and Response (EDR): Deploy EDR solutions configured to detect process hollowing and the execution of known mining binaries (often derivatives of XMRig) operating under the guise of system processes.
Known aliases
Threat reports may refer to this family under multiple names:
MITRE ATT&CK Techniques
This family has been observed using the following ATT&CK techniques: T1496 T1055 T1059
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1059: Restrict execution of scripting languages such as PowerShell, VBScript, or Python to authorized administrators. Enforce Script Block Logging.
Generated Detections (Boilerplate)
These YARA and Sigma rules are auto-generated based on the family name and aliases. They must be heavily tuned before deployment in a production environment.
YARA Rule
rule MALWARE_WIN_MMXMR {
meta:
description = "Detects Mmxmr (trojan)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "mmxmr" ascii wide nocase
$s2 = "miner.mmxmr" ascii wide nocase
$s3 = "coinminer.monero" ascii wide nocase
$s4 = "riskware.bitcoinminer" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Mmxmr Activity
id: c9bcd46aa867beee3f293e4ce590ea77
status: experimental
description: Detects generic indicators of the mmxmr malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*mmxmr*"
- "*miner.mmxmr*"
- "*coinminer.monero*"
- "*riskware.bitcoinminer*"
condition: selection
level: mediumReferences & External Analysis
- Search "mmxmr" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Mmxmr Trojan from Windows?
Manual removal of Mmxmr is highly discouraged as it may leave persistence mechanisms intact. We recommend disconnecting the device from the internet and utilizing a professional incident response service or enterprise-grade EDR software to conduct a full forensic sweep.
Is Mmxmr a virus or a Trojan?
Mmxmr is classified as a Trojan. Unlike traditional viruses that infect files, modern malware like Mmxmr typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Mmxmr infection?
Symptoms of Mmxmr can include unexpected system slowness, unauthorized outbound network traffic to unknown IP addresses, disabled security software, and suspicious background processes running from AppData or Temp directories.
Related Families (Category: trojan)
Explore other malware families in the same category:
Protect Your Network Against Trojans
Want to prevent Mmxmr and similar threats from compromising your organization? Read our comprehensive defensive guide: Banking Trojan Protection.
Machine-readable
Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/mmxmr.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.