Established 2026Sunday, 6 September 2026
presents

The CloudySec Digest

The wires, edited.
← Front PageResearch Desk
Research

Attack of The Extensions

SpecterOps demonstrates how attackers can silently side-load Chromium extensions to establish browser-resident C2 channels, enabling persistent cookie theft that evades most endpoint controls.

Summary written by editorial AI · Source link below

Filed by SpecterOps1 min readRead at source ↗

TL;DR: Browser extensions can turn Chromium into a persistent foothold. This post introduces a way to silently install extensions turning Chromium browsers into a command and control (C2) platform for persistent cookie theft. Intro This blog is a continuation of Dough No! Revisiting Cookie Theft. In the previous blog, we looked at how Chromium’s Application […] The post Attack of The Extensions appeared first on SpecterOps .

Editorial Analysis

Why it matters

Browser-based C2 persistence evades traditional EDR and proxy controls; enterprises relying on Chromium without extension allow-lists face a blind spot that attackers are now actively weaponising.

What to do

Enforce a strict Chromium extension allow-list via Group Policy and monitor for unsigned or developer-mode extension installations.

Board brief

Browsers can be silently turned into attacker footholds; extension allow-listing is a low-cost control that closes this gap.

Forward-looking interpretation drafted by editorial AI under human review — not a reproduction of the source. See methodology.

Continue at the source
Read the full report at SpecterOps

External link — opens at SpecterOps in a new tab.

§
Continue with

More from the Research Desk