MEDIUMVulnerability
Global

TeamFiltration Campaign Compromises Seven Microsoft 365 Accounts Using Default Passwords

·Source: The Hacker News

Updated:

Executive Summary

Cybersecurity researchers have disclosed details of an active TeamFiltration campaign codenamed UNK_CondorFiltration that has targeted over 5,700 accounts across 28 Microsoft 365 tenants. According to Proofpoint, the activity has primarily focused on Chilean retail and financial institutions. It originated from 1,487 unique AWS EC2 source IP addresses. "The campaign compromised 7 accounts –

Analysis

Cybersecurity researchers have disclosed details of an active TeamFiltration campaign codenamed UNK_CondorFiltration that has targeted over 5,700 accounts across 28 Microsoft 365 tenants. According to Proofpoint, the activity has primarily focused on Chilean retail and financial institutions. It originated from 1,487 unique AWS EC2 source IP addresses. "The campaign compromised 7 accounts –
Source Attribution

Originally published by The Hacker News on Sep 24, 2026.

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