Paper
Overview
Executive Summary
The "Paper" malware family is typically categorized as adware, a Potentially Unwanted Program (PUP), or a browser hijacker. It is engineered to aggressively monetize an infected user's web traffic by injecting unauthorized advertisements, modifying search engine results, and tracking browsing habits without transparent consent.Infection Vector and Operational Tactics
Paper predominantly relies on software bundling for distribution. Users inadvertently install the adware when downloading "free" utilities—such as PDF converters, media players, or file extractors—from deceptive third-party software repositories. The adware components are hidden within "Express" or "Recommended" installation paths. Upon installation, Paper embeds itself deeply within the operating system and installed web browsers (Chrome, Edge, Firefox) via malicious extensions and modified proxy settings. Its primary behaviors include:- Ad Injection: Overlaying intrusive banner ads, pop-ups, and in-text hyperlinks on legitimate websites, severely degrading the user experience.
- Search Hijacking: Forcing the default search engine and homepage to redirect to an affiliate-controlled search portal, ensuring the adware operators receive a commission for every query.
- Data Harvesting: Continuously tracking the user's browsing history, search terms, and location data to build profiles for targeted advertising or to sell to third-party data brokers.
Security and Privacy Risks
While Paper does not typically exhibit destructive capabilities like ransomware, it poses a significant risk to user privacy and system stability. The injected advertisements are frequently served by low-reputation ad networks, increasing the likelihood of "malvertising" attacks that can lead to severe secondary infections.Mitigation and Removal
- Browser Remediation: Remove any unknown or suspicious browser extensions. Perform a complete reset of the affected web browsers to clear modified search and homepage settings.
- Endpoint Scanning: Utilize a reputable anti-malware or EDR solution to scan for and remove the underlying executables and registry modifications associated with the Paper family.
- Software Policies: Enforce strict application control policies (e.g., AppLocker) to prevent users from executing unapproved software installers that frequently bundle adware.
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: T1566.002 T1176 T1112
Tactical Mitigations
Based on the techniques used by this family, consider the following defensive strategies:
- T1566.002: Inspect email links for known malicious domains and use link-rewriting services for time-of-click analysis.
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_PAPER {
meta:
description = "Detects Paper (ransomware)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "paper" ascii wide nocase
$s2 = "adware.paper" ascii wide nocase
$s3 = "pup.paper" ascii wide nocase
$s4 = "browsermodifier.paper" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Paper Activity
id: 7e3f660480ab1640de8024c200b5a4d3
status: experimental
description: Detects generic indicators of the paper malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*paper*"
- "*adware.paper*"
- "*pup.paper*"
- "*browsermodifier.paper*"
condition: selection
level: mediumReferences & External Analysis
- Search "paper" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Paper Ransomware from Windows?
Manual removal of Paper 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 Paper a virus or a Ransomware?
Paper is classified as a Ransomware. Unlike traditional viruses that infect files, modern malware like Paper typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Paper infection?
Symptoms of Paper 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: ransomware)
Explore other malware families in the same category:
Protect Your Network Against Ransomwares
Want to prevent Paper and similar threats from compromising your organization? Read our comprehensive defensive guide: Ransomware Protection Guide.
Machine-readable
Get this profile as JSON: https://jordan123234-malware-families-explorer.static.hf.space/api/paper.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.