T1534 Internal Spearphishing
After they already have access to accounts or systems within the environment, adversaries may use internal spearphishing to gain access to additional information or compromise other users within the same organization. Internal spearphishing is multi-staged campaign where a legitimate account is initially compromised either by controlling the user's device or by compromising the account…
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Sigma rules to hunt it
SigmaHQ has no rules for this technique.
Rules from SigmaHQ · Detection Rule License 1.1. Technique from MITRE ATT&CK®.