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Browser cookie and session theft

Mass harvesting of browser cookies, credentials and browsing data enabling session replay against victim accounts.

Current stories

buildOne report1 publisher

Replay kits load a stolen Claude cookie into a fingerprint the service already trusts

FlashPoint pulled 555 AI-service tokens out of a single 44,791-token stealer dump, 24 of them still valid, and five dollars is the Telegram bulk price because a copied session leaves the victim's own login working.

Publishers:dev.to

Reality

Evidence22
Adoption30
Hype gap+45
Incentives55
Confidence28
securityOne report1 publisher

Software priced 610,000 stolen Roblox accounts by what was inside them

Prosecutors in Ukraine's Lviv region say three men spent about a year harvesting Roblox session cookies and running them through software that valued each account before sale. They put the potential take at $480,000.

Publishers:therecord.media

Reality

Evidence58
Adoption66
Hype gap+15
Incentives55
Confidence57
buildOne report1 publisher

Four crypto extensions read session tokens from inside the tabs where traders are already logged in

Socket traced six Chrome and Firefox listings to one publisher operation whose collector reaches for Firebase access tokens and Axiom bundle keys. Chrome pulled four in July 2026. The Firefox one is still up.

Publishers:socket.dev

Reality

Evidence72
Adoption34
Hype gap+14
Incentives60
Confidence63
buildOne report1 publisher

BigBear 2.0 breaks WebAuthn in the browser to force a relayable MFA fallback

CloudSEK says the kit's JavaScript disrupts FIDO2 on a cloned Microsoft 365 login and steers the victim to TOTP, SMS or push, so the tenant's authentication strength policy decides whether the relay works.

Publishers:dev.to

Reality

Evidence40
Adoption
Not scored
Hype gap+12
Incentives50
Confidence45
productOne report1 publisher

Anthropic wipes saved cards after infostealers copy Claude login sessions

The company told affected customers by email, with nothing on its status page, and the only symptom on the user's side was usage that refilled and drained on its own. Watching that burn is now the account holder's job.

Reality

Evidence40
Adoption30
Hype gap+12
Incentives55
Confidence45
securityOne report1 publisher

A trailer date is a campaign schedule: fake GTA 6 sites are selling stolen session cookies

Fake Rockstar pages push a 1.1 MB Vidar sample that takes session cookies as well as saved passwords. Cookies replay past 2FA, which makes this a corporate access problem wearing a consumer costume.

Publishers:malwarebytes.com

Reality

Evidence61
Adoption32
Hype gap+12
Incentives73
Confidence44
securityOne report1 publisher

One console, two businesses: Broadcom says Jewelbug runs espionage and crypto fraud together

Broadcom's Threat Hunter Team says the same small team, the same infrastructure and one control panel serve both Chinese state espionage and a crypto-fraud sideline. Actor-type triage does not survive that.

Reality

Evidence58
Adoption68
Hype gap+12
Incentives62
Confidence55