Malicious 'Edgecution' Extension Exploits Microsoft Edge Native Messaging for Ransomware Deployment
Security researchers reported on June 25, 2026, the discovery of a new malware campaign dubbed 'Edgecution,' which utilizes a malicious Microsoft Edge extension to deploy ransomware and a Python-based backdoor. The extension abuses the Native Messaging API to escape the browser sandbox and establish a persistent system-level executor. Attackers are reportedly using Microsoft Teams for social engineering, directing victims to fake 'Outlook Updates Management Console' websites to trick them into installing the malicious extension. This campaign is believed to be operated by an Initial Access Broker (IAB) linked to the 'Payout Kings' ransomware operation.
Signal context
First seen: Jun 25, 2026
Last updated: Jun 29, 2026
Status: Public signal
Key points
- Malicious 'Edgecution' extension for Microsoft Edge reported on June 25, 2026.
- Exploits Native Messaging API to escape browser sandbox and deploy ransomware/backdoor.
- Attackers use Microsoft Teams for social engineering to trick users into installation.
Signal analysis
BetaThis analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Sector: Information
Likely country: Location not provided
Watch phishing, executive impersonation and account-takeover exposure.
- Source type: outside the affected organization
Impact area: Availability
- 27 signals in the same sector
- 22 signals with the same likely impact area
- 1 signal linked to this organization/domain
External sources
Microsoft Shuts 73 GitHub Repos After Miasma Worm Compromise | AI Weeklyhttps://aiweekly.com/microsoft-github-miasma-worm-compromise/Public source from aiweekly.com.
Daily Cybersecurity News – June 25, 2026 - Cyber Recapshttps://cyberrecaps.com/news/cybersecurity-news-june-25-2026/Public source from cyberrecaps.com.
Cybersecurity Daily Briefing: June 25, 2026 - TECHMANIACS.comhttps://techmaniacs.com/2026/06/25/cybersecurity-daily-briefing-june-25-2026/Public source from techmaniacs.com.
Edge users beware — this malicious extension can break out of the sandbox and install ransomware | TechRadarhttps://www.techradar.com/pro/security/edge-users-beware-this-malicious-extension-can-break-out-of-the-sandbox-and-install-ransomwarePublic source from techradar.com.
Related signals
Grouped by why the signal is relevant.
eogb.co.uk Hit by Stormous Ransomware Group
eogb.co.uk, a UK-based organization, was claimed as a victim by the Stormous ransomware group. The incident was discovered on June 28, 2026, at 21:29 UTC, with deep access to Microsoft Dynamics GP, internal legal documents, partnership agreements, customer contracts, operational spreadsheets, financial reports, and executive documents.
Latvijas Valsts Mezi (LVM) Suffers Cybersecurity Breach
Latvia's state-owned company Latvijas Valsts Mezi (LVM) confirmed a cybersecurity breach of its IT systems, reported on June 26, 2026. The incident, discovered around June 22, led to hackers accessing LVM's IT infrastructure. External IT systems, including 'LVM GEO' and the 'Mednis' hunting app, were taken offline, along with some internal communication systems. A foreign ransomware group claimed responsibility for the attack, which raised concerns due to LVM's role in developing an electoral IT platform for Latvia's parliamentary elections.
Settra Suffers Ransomware Attack, Corporate Accounting Data Compromised
Settra, a company based in Singapore, was impacted by a ransomware attack with an estimated attack date of June 11, 2026. The attackers gained deep access to Microsoft Dynamics GP, compromising complete corporate accounting, invoices, and vendor details. This incident was disclosed on Ransomware.live.
French government messaging platform Tchap breached via compromised user account
DINUM, the French government's digital affairs directorate, warned that hackers breached Tchap, France's encrypted messaging platform for public sector workers, using a compromised user account. The incident was detected by ANSSI, after which the affected account was blocked and an investigation launched into what conversations and data may have been accessed. DINUM has notified France's data protection authority, CNIL, due to the potential exposure of personal data. A threat actor claimed responsibility, alleging they used social engineering to access an education-related account and scrape messages, account information, and files, including 13.5GB of data from the French tax authority and other civil servants.
Challenge Manufacturing Data Breach Exposes Social Security Numbers
Challenge Manufacturing, an automotive manufacturing company, disclosed a data breach to the Texas Attorney General on June 26, 2026. The Chaos ransomware group claimed responsibility on May 17, 2026, stating they obtained 270 GB of data from the company's systems.
Alamo Heights ISD Reports Data Breach Following Ransomware Attack
Alamo Heights Independent School District (ISD) reported a data breach impacting over 26,000 people, disclosed to the Texas Attorney General's office on June 25, 2026 (published June 26, 2026 UTC). The breach was linked to a ransomware attack by the Qilin group, which occurred on April 9, 2026. The compromised information included names, Social Security numbers, driver's license numbers, and bank and medical information.