Government-linked corporation
Four layers of security. One intrusion none of them saw.
What we found
An intrusion four layers deep
A national organisation holding workforce data for an entire country had four layers of security in place. None of them had flagged anything.
Our threat hunting found an intrusion already inside the environment. The attacker was operating with valid administrative credentials, which is why nothing had triggered. They had accessed sensitive files and had begun deleting their own login traces to remove the evidence of how they got in.
The evidence
What the account was doing
STATUS
Contained before any data left the environment.
LAYERS BYPASSED
Four, none of which raised an alert.
ADMIN CREDENTIALS
Valid, and in active use by the attacker.
FILE ACCESS
Sensitive files confirmed accessed.
LOG DELETION
Halted while in progress.
What we did
Containment and remediation
We contained the threat, produced a full incident report tracing the activity, and advised on remediation.
The client's position before the engagement was not unusual. They had invested in controls and had no reason to believe anything was wrong. What they did not have was anyone continuously examining what those controls were failing to catch, and an attacker using legitimate credentials will not trigger a control designed to detect illegitimate ones.
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