Deepsea
Overview
Executive Summary
DeepSea is an intrusive adware family and Potentially Unwanted Program (PUP) that aggressively alters browser behavior and injects unsolicited advertisements into web pages. It is engineered to generate illicit revenue for its operators by forcing users to interact with sponsored content and affiliate links.Technical Analysis and Infection Chain
DeepSea typically infiltrates systems disguised as legitimate browser extensions, media players, or software updates. During installation, it silently deploys background services and modifies the Windows Registry to ensure it runs automatically upon system boot. Once active, DeepSea hooks into popular web browsers (including Chrome, Firefox, and Edge) to monitor web traffic. It intercepts HTTP/HTTPS requests to overlay pop-ups, banners, and in-text hyperlinks on legitimate websites. The adware relies heavily on obfuscated JavaScript to bypass basic ad-blockers and continuously communicates with command-and-control (C2) servers to fetch new advertising rules and payload updates.Privacy and Security Implications
The presence of DeepSea on a network introduces severe privacy risks. The adware tracks geolocation data, IP addresses, and browsing habits, creating detailed profiles of infected users. Additionally, the ad networks utilized by DeepSea are notorious for hosting malicious content, including tech support scams and phishing pages, which exponentially increases the risk of secondary infections.Remediation Guidance
- Network Filtering: Block known DeepSea C2 domains and advertising networks at the DNS or firewall level.
- Browser Auditing: Regularly audit and restrict the installation of unauthorized browser extensions using Group Policy (GPO) or endpoint management tools.
- System Cleaning: Utilize robust endpoint protection platforms (EPP) to identify and quarantine DeepSea components, followed by a complete reset of affected web browsers.
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_DEEPSEA {
meta:
description = "Detects Deepsea (advanced_threat)"
author = "SystemHelpdesk Boilerplate Generator"
date = "2026-07-06"
strings:
$s1 = "deepsea" ascii wide nocase
$s2 = "adware.deepsea" ascii wide nocase
$s3 = "pup.deepsea" ascii wide nocase
$s4 = "deepsea adware" ascii wide nocase
condition:
uint16(0) == 0x5a4d and any of them
}Sigma Rule
title: Suspicious Deepsea Activity
id: ece598fad875fdb1a15c39b09d2c8d2c
status: experimental
description: Detects generic indicators of the deepsea malware family.
logsource:
category: process_creation
product: windows
detection:
selection:
Image|endswith:
- '\cmd.exe'
- '\powershell.exe'
CommandLine|contains:
- "*deepsea*"
- "*adware.deepsea*"
- "*pup.deepsea*"
- "*deepsea adware*"
condition: selection
level: mediumReferences & External Analysis
- Search "deepsea" on VirusTotal (External Analysis)
Frequently Asked Questions
How do I remove the Deepsea Advanced_Threat from Windows?
Manual removal of Deepsea 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 Deepsea a virus or a Advanced_Threat?
Deepsea is classified as a Advanced_Threat. Unlike traditional viruses that infect files, modern malware like Deepsea typically operates as a standalone payload designed to compromise systems, steal data, or deploy secondary stage implants.
What are the main symptoms of a Deepsea infection?
Symptoms of Deepsea 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: advanced_threat)
Explore other malware families in the same category:
Protect Your Network Against Advanced_Threats
Want to prevent Deepsea 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://jordanricky1604-ship-it.github.io/malware-families-catalog/api/deepsea.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.