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Malware

infostealers

1 mentions in 7 days · 3 in 30 days · 3 total · first seen · last

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Credential Theft: How Attackers Steal & Use Stolen Credentials

Huntress explains how attackers steal credentials through phishing, AitM, infostealers, and dumping, then use them for lateral movement, BEC, and ransomware.

Huntress published an educational overview of credential theft, citing that roughly 70% of confirmed data breaches begin with stolen credentials. It details acquisition methods including phishing, adversary-in-the-middle attacks that capture MFA session tokens, infostealers (nearly a quarter of threats Huntress observed in 2025), Mimikatz-based credential dumping, credential stuffing, and password spraying. The piece then covers post-theft actions such as lateral movement, privilege escalation, account takeover, business email compromise, and ransomware, and closes with behavioral detection guidance and layered prevention strategies.

Huntress · 5d agoResearch

Anthropic Users Hit by Infostealer Attacks, Session Thefts

A threat actor used multiple infostealers to harvest session data and hijack Claude accounts belonging to an unknown number of users.

Dark Reading reports that a threat actor deployed a variety of infostealer families to collect session information, which was then used to access Claude accounts belonging to an unknown number of users. Anthropic has not disclosed the scale of the compromise. The incident underscores session token theft via infostealer logs as an effective route into AI platform accounts.

Dark Reading · 15d agoMalware in the wild

Infostealers Harvest 1.7 Billion Credentials in Six Months

Flashpoint reports infostealers harvested 1.7 billion credentials in the first half of 2026.

Threat intelligence firm Flashpoint found that infostealer malware was responsible for the theft of 1.7 billion credentials during the first half of 2026. The figure underscores the scale of commodity credential harvesting feeding downstream account takeover, fraud and ransomware operations.

Infosecurity Magazine · 29d agoMalware in the wild

Appears with

ai model Claude 1organization Anthropic 1organization Flashpoint 1organization Huntress 1product Claude 1vendor Anthropic 1vendor Flashpoint 1vendor Huntress 1vendor Mimikatz 1victim Anthropic users 1
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