Phantom Shuttle Chrome extension traffic-hijacking activity
Malware Activity
Summary
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The Phantom Shuttle Chrome extensions remain available in the Chrome Web Store and are actively hijacking user traffic to steal credentials, cookies, tokens, and personal data from users in China. The extensions pose as proxy-service tools, but they route traffic through attacker-controlled proxies and silently intercept sensitive activity. Their continued presence matters because the malicious code can exfiltrate high-value account data from installed browsers.
Related Happenings
Chrome Web Store malicious extensions coordinated campaign using shared C2
Campaign
First: 14.04.2026 23:33
Last: 14.04.2026 23:33
Sources 1
About this happening:
A coordinated **Chrome Web Store** extension operation is stealing **Google OAuth2 Bearer tokens**, deploying **backdoors**, and running **ad fraud** across more than **100 malici...
Chrome Web Store malicious extensions coordinated campaign using shared C2
CampaignAbout this happening: A coordinated **Chrome Web Store** extension operation is stealing **Google OAuth2 Bearer tokens**, deploying **backdoors**, and running **ad fraud** across more than **100 malici...
108 Malicious Chrome extension campaign
Campaign
First: 14.04.2026 14:30
Last: 14.04.2026 14:30
Sources 1
About this happening:
A **large-scale campaign** of **108 malicious Chrome extensions** exposed roughly **20,000 users** to **session hijacking** and data theft through a shared **C2 infrastructure**.
108 Malicious Chrome extension campaign
CampaignAbout this happening: A **large-scale campaign** of **108 malicious Chrome extensions** exposed roughly **20,000 users** to **session hijacking** and data theft through a shared **C2 infrastructure**.
108 Malicious Google Chrome extensions sharing a C2 backend
Malware Activity
First: 14.04.2026 11:35
Last: 14.04.2026 11:35
Sources 1
About this happening:
**108 malicious Google Chrome extensions** were found to use the same **C2 infrastructure** to steal credentials, sessions, and browsing data while injecting ads and arbitrary Jav...
108 Malicious Google Chrome extensions sharing a C2 backend
Malware ActivityAbout this happening: **108 malicious Google Chrome extensions** were found to use the same **C2 infrastructure** to steal credentials, sessions, and browsing data while injecting ads and arbitrary Jav...
ShieldGuard browser-extension data-harvesting malware
Malware Activity
First: 18.03.2026 16:15
Last: 18.03.2026 16:15
Sources 1
About this happening:
A malicious **ShieldGuard** browser extension was dismantled after it was found harvesting sensitive data from **crypto users**, putting wallet and account information at risk. Th...
ShieldGuard browser-extension data-harvesting malware
Malware ActivityAbout this happening: A malicious **ShieldGuard** browser extension was dismantled after it was found harvesting sensitive data from **crypto users**, putting wallet and account information at risk. Th...
QuickLens and ShotBird malicious Chrome extension update chain
Malware Activity
First: 09.03.2026 12:28
Last: 09.03.2026 12:28
Sources 1
About this happening:
The **QuickLens** and **ShotBird** Chrome extensions have become **malicious after ownership transfer**, turning trusted add-ons into a delivery path for code injection and data t...
QuickLens and ShotBird malicious Chrome extension update chain
Malware ActivityAbout this happening: The **QuickLens** and **ShotBird** Chrome extensions have become **malicious after ownership transfer**, turning trusted add-ons into a delivery path for code injection and data t...
Timeline
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23.12.2025 15:31 2 articles · 5mo ago
Phantom Shuttle Chrome extensions disclosed as traffic-hijacking tools
Initial DisclosureResearchers at Socket identified two Chrome Web Store extensions named Phantom Shuttle that masquerade as proxy and network-speed tools for users in China while routing user web traffic through attacker-controlled proxies to steal credentials, card details, passwords, session cookies, and API tokens. The extensions were still present in Chrome's official marketplace and had been active since at least 2017.
Show sources
- Malicious extensions in Chrome Web store steal user credentials — www.bleepingcomputer.com — 23.12.2025 15:31
- Malicious extensions in Chrome Web store steal user credentials — www.bleepingcomputer.com — 23.12.2025 15:31