Ramdo
Overview
Executive Summary
Ramdo (also known as Redyms) is a specialized Trojan and botnet client explicitly designed for click fraud and search engine manipulation. Active since at least 2013, it silently hijacks a victim's computing resources and internet connection to automatically "click" on online advertisements, generating fraudulent pay-per-click revenue for the attackers. It operates entirely in the background, making it highly difficult for a user to detect without security software.Infection Vector and Technical Capabilities
Ramdo is almost exclusively distributed via exploit kits (such as the historically prominent Magnitude Exploit Kit) hosted on compromised or malicious websites. Users are infected silently via drive-by downloads when visiting these sites with an unpatched web browser or plugin (like Flash or Java). Its technical operation focuses on covert web interaction:- Hidden Browser Instances: Upon execution, Ramdo creates invisible, hidden instances of legitimate web browsers (like Internet Explorer or Chrome). The user sees no browser window, but the malware is actively surfing the web in the background.
- Automated Click Fraud: The malware receives a list of target URLs (ads) from its Command and Control (C2) server. It uses the hidden browser instances to load these ads and programmatically simulate human clicks, generating fraudulent revenue for the attacker's affiliate accounts.
- Domain Generation Algorithm (DGA): Ramdo utilizes a DGA to locate its C2 servers. It algorithmically generates hundreds of potential domain names daily, attempting to connect to them. This makes it highly resilient against simple DNS blocklists or domain takedowns.
Threat Assessment
While Ramdo does not directly steal files or deploy ransomware, it poses a significant threat to network performance and operational integrity. A Ramdo infection consumes considerable bandwidth and CPU resources. Furthermore, the presence of Ramdo indicates that the endpoint is vulnerable to exploit kits, meaning more destructive malware could easily follow.Incident Response and Remediation
- Network Traffic Analysis: Security teams should monitor DNS logs for the telltale signs of a DGA (hundreds of failed DNS queries for nonsensical, random-looking domain names). This is the fastest way to identify a Ramdo infection on the network.
- Malware Removal: Utilize enterprise antivirus or EDR to scan and remove the Ramdo executable. Pay close attention to hidden startup folders and registry `Run` keys where it establishes persistence.
- Vulnerability Patching: Because Ramdo spreads via exploit kits, the infection is proof of unpatched software. The affected endpoint must have its OS and all third-party software (browsers, plugins, PDF readers) immediately updated to close the initial infection vector.
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: T1568.002 T1129 T1547.001
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_RAMDO {
meta:
description = "Detects Ramdo (click_fraud)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "ramdo" ascii wide nocase
$s2 = "trojan.ramdo" ascii wide nocase
$s3 = "clickfraud.redyms" ascii wide nocase
$s4 = "win32/ramdo" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Ramdo Activity
id: 020c8e49f4eb53841563b66dc8994687
status: experimental
description: Detects generic indicators of the ramdo malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*ramdo*"
- "*trojan.ramdo*"
- "*clickfraud.redyms*"
- "*win32/ramdo*"
condition: selection
level: mediumReferences & External Analysis
- Search "ramdo" on VirusTotal (External Analysis)
Frequently Asked Questions
Where can I learn more about ramdo?
Refer to the linked MITRE ATT&CK technique pages, which document the behaviors associated with this family.
How do I remove the Ramdo Click_Fraud from Windows?
Manual removal of Ramdo 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 Ramdo a virus or a Click_Fraud?
Ramdo is classified as a Click_Fraud. Unlike traditional viruses that infect files, modern malware like Ramdo typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Ramdo infection?
Symptoms of Ramdo 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: click_fraud)
Explore other malware families in the same category:
Protect Your Network Against Click_Frauds
Want to prevent Ramdo and similar threats from compromising your organization? Read our comprehensive defensive guide: Suspect an Infection? What to do.
Machine-readable
Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/ramdo.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.