Threat actormedium
Operation MacroMaze: APT28 exploits webhooks for covert data exfiltration
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-21509 | Local Security Feature Bypass in Microsoft Office Under Active Exploitation | 7.8 | 71% | KEV | KEV |
Indicators of compromise
auto-extracted · verify before use · export allAll| Type | Indicator | Context |
|---|---|---|
| domain | webhook.site | uments that contain an “INCLUDEPICTURE” field pointing to a webhook[.]site URL hosting a JPG. “All analyzed documents share a common |
From the original article
3 min read at securityaffairs.com
Russia-linked APT28 targeted European entities with a webhook-based macro malware campaign called Operation MacroMaze. Russia-linked APT28 (aka UAC-0001, aka Fancy Bear , Pawn Storm , Sofacy Group , Sednit , BlueDelta, and STRONTIUM ) launched Operation MacroMaze, targeting select entities in Western and Central Europe from September 2025 to January 2026.
By @securityaffairs · securityaffairs.com
A short excerpt; the article and its images belong to the publisher. Summary, key facts and assessment above are AI-written from the article and can be wrong.