TTP Replay and Evaluation: Closing Detection Gaps with Lares Purple Teaming

TTP Replay and Evaluation: Closing Detection Gaps with Lares Purple Teaming

TTP Replay and Evaluation: Closing Detection Gaps with Lares Purple Teaming 1200 630 Andrew Heller

Most threat detection failures happen because security teams don’t test their ability to detect actual attacks in real-time. Many organizations deploy EDR, SIEM, and SOAR platforms, but without validating detection, attackers still slip through the cracks unnoticed.

Lares’ Purple Teaming methodology utilizes TTP Replay—a structured process where Red Teams re-execute attack chains that mimic real-world adversaries. This ensures security teams can detect and respond to threats before they become incidents.


How TTP Replay Enhances Cyber Defense

1. Traditional Testing vs. Adversary Simulations

Traditional security assessments focus on patching vulnerabilities, but TTP Replay tests whether your defenses actually detect attacker behavior.

  • Traditional Testing: Scans for known vulnerabilities and missing patches.
  • TTP Replay: Replays real-world adversary tactics to validate detection rules.
🔍 Example TTP Replay Scenario:

Lares executes a Cobalt Strike beacon deployment and tests whether SIEM alerts trigger at various attack stages:

Attack Stage

Expected Detection

Common Failure Points

Initial Access

Suspicious download alert

Attackers evade detection using encoded payloads

Persistence

Registry modification alert

Weak logging configuration mis

ses key changes

Privilege Escalation

EDR detected process injection

Security tools may lack visibility into LOLBins

Lateral Movement

Correlation of authentication attempts

SIEM lacks cross-host correlation rules

This allows Blue Teams to validate whether security controls are correctly configured and tune detection where gaps exist.

2. Detection Engineering: Fine-Tuning Security Alerts

Once TTP Replay reveals detection gaps, Lares works with defenders to improve alert logic:

  • Adjust SIEM correlation rules to flag multiple failed logins across systems.
  • Modify EDR detection logic to better flag rundll32.exe spawning unusual processes.
  • Refine log retention settings to ensure important events are stored long enough for analysis.

🔍 Example Detection Rule for Cobalt Strike Beaconing:

This ensures security teams move beyond generic alerts and create custom, high-fidelity detections.

🔗 Want to validate your detection rules? Learn more about Lares’ Purple Teaming methodology: Purple Team Methodology 

Empowering Organizations to Maximize Their Security Potential.

Lares is a security consulting firm that helps companies secure electronic, physical, intellectual, and financial assets through a unique blend of assessment, testing, and coaching since 2008.

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