T1185

Official Description

Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, and intercept information as part of various browser session hijacking techniques.(Citation: Wikipedia Man in the Browser)

A specific example is when an adversary injects software into a browser that allows them to inherit cookies, HTTP sessions, and SSL client certificates of a user then use the browser as a way to pivot into an authenticated intranet.(Citation: Cobalt Strike Browser Pivot)(Citation: ICEBRG Chrome Extensions) Executing browser-based behaviors such as pivoting may require specific process permissions, such as <code>SeDebugPrivilege</code> and/or high-integrity/administrator rights.

Another example involves pivoting browser traffic from the adversary's browser through the user's browser by setting up a proxy which will redirect web traffic. This does not alter the user's traffic in any way, and the proxy connection can be severed as soon as the browser is closed. The adversary assumes the security context of whichever browser process the proxy is injected into. Browsers typically create a new process for each tab that is opened and permissions and certificates are separated accordingly. With these permissions, an adversary could potentially browse to any resource on an intranet, such as [Sharepoint](https://attack.mitre.org/techniques/T1213/002) or webmail, that is accessible through the browser and which the browser has sufficient permissions. Browser pivoting may also bypass security provided by 2-factor authentication.(Citation: cobaltstrike manual)

Tactics: Collection
Platforms: Windows
MITRE Version: 2.1
Last Modified: May 12, 2026

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Reported Context (23)

Injected browser JavaScript alters withdrawal submissions and displayed address values in targeted exchange pages. Malicious RubyGems Packages Deploy Reverse Shells and Cryptocurrency-Theft Toolkit
The stealer injects scripts into the victim’s authenticated Chrome or Edge sessions to manipulate exchange and webmail pages. Underground Crypto-Stealing Operation Drained About $100,000
An injected script uses the victim's authenticated Google browser session to automate an account-takeover flow. Malicious Firefox Extension Uses Remote Payload to Hijack Google Accounts
The script uses the victim’s authenticated webmail session and CSRF token to make SOAP requests. LAUNDRY BEAR Exploits Zimbra Flaw to Steal Emails and Credentials
ted backdoor replaces or appends payload content to selected HTTP responses delivered through HAProxy. DPRK-Linked Toolkit Uses HAProxy Backdoor and CurlRAT to Target South Korean Organizations

CVE (18)

Malware (42)

People (11)

Threat Actors (37)

MITRE ATT&CK (147)

Vendors (16)

Products (59)

Tools (53)

Industries (20)

Countries (22)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.