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Malware · SOC Analyst What's the first thing you do when you receive a suspicious email submission from a user?
(1) DO NOT click any links or open attachments. (2) Detonate in sandbox — VMRay, Joe Sandbox, Any.Run for safe analysis. (3) Extract IOCs — sender email, sender IP, URLs, file hashes (SHA-256). (4) Check IOC reputation — VirusTotal, AlienVault OTX, urlscan.io. (5) If malicious confirmed: search inbox for other affected users (potential phishing campaign), block sender domain, retract emails via M365 admin if possible. (6) Update detection — add IOCs to SIEM blocklist, write Sigma rule for similar patterns. (7) User communication — confirm to reporter, wider awareness if campaign. Time-target: 30 minutes from receipt to first action.
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