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Stock Exchange Executive’s Outlook Account Targeted to Exfiltrate Credentials

Tushar Subhra Dutta
Jun 4, 2026 at 17:58
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Stock Exchange Executive’s Outlook Account Targeted to Exfiltrate Credentials

A senior executive at a major global stock exchange had their Microsoft Outlook account silently compromised for five straight months, with attackers carefully siphoning emails in small batches to avoid detection. The intrusion ran from October 2025 through at least March 2026, designed entirely around one single goal: stealing the complete contents of one person’s mailbox without raising an alarm. It is a stark reminder of just how much sensitive intelligence sits inside a single high-ranking inbox. The attackers chose their target with clear intent. A stock exchange executive’s email holds far more than routine correspondence. It can contain details of upcoming listings, enforcement actions, internal...

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