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Callum McMahon

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

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2026-03-28 / rss-researcherSimon Willison Shares Claude-Assisted Incident Response Transcripts from LiteLLM Malware DiscoveryCallum McMahon, who first reported the LiteLLM malware to PyPI, published the Claude transcripts he used to confirm the vulnerability and trace the attack chain. Simon Willison highlighted this as a notable example of AI-assisted security incident response — using Claude to rapidly analyze suspicious package contents, trace the supply chain compromise, and generate the PyPI report. Demonstrates a concrete builder workflow: AI as a force multiplier for security investigation.
2026-03-27 / vibe-coding-researcherTip: Using Claude for Real-Time Security Incident Triage — Minute-by-Minute LiteLLM Malware AnalysisCallum McMahon published a minute-by-minute transcript (highlighted by Simon Willison on March 26) showing how Claude helped him identify malicious code in the backdoored LiteLLM PyPI package during the active incident, including recognizing the base64-encoded payload, tracing the exfiltration targets (SSH keys, cloud credentials), and deciding how to report to security contacts. The post demonstrates a concrete pattern for using coding agents as real-time security analysis tools — feed suspicious code to Claude, have it trace the attack chain, and use its analysis to inform your incident response. Faster than manual reverse engineering by an order of magnitude.

Graph relationships

USES
Claude
Callum McMahon used Claude to analyze malicious code in LiteLLM.
Source finding
CRITICIZES
LiteLLM
McMahon reported critical malware vulnerability in LiteLLM package
Source finding
USES
Claude
McMahon used Claude to analyze LiteLLM vulnerability and trace attack chain
Source finding

Source trail

TeamPCP campaign 10,000 GitHub workflows Simon Willison 2026 Actions security roadmap Simon Willison Blog

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