Definition

A red team engagement simulates a full adversary campaign — initial access, lateral movement, persistence, and objective achievement — without detection-team visibility, measuring whether defenders can detect and respond autonomously. A purple team exercise is a collaborative, transparent operation where red and blue teams work in tandem, mapping attacks to MITRE ATT&CK techniques and immediately tuning detection rules, delivering detection-coverage uplift rather than a pass/fail verdict.

Why it matters

The pressure on VAPT programmes is shifting in specific, observable ways:

• SAMA CSF 3.3.6 and NCA ECC-1 2-3-2 require advanced threat simulation for Tier-1 financial entities; regulators now ask which MITRE ATT&CK tactics were tested and what detection rate was achieved, favouring purple-team evidence.
• Red team engagements costing SAR 300K–700K deliver limited uplift if the SOC has fewer than 3 analysts or immature SIEM use-case libraries — purple team at SAR 150K–350K yields measurable detection-rule improvements for the same budget.
• CREST STAR and CBEST frameworks (adopted by CBUAE for systemic banks) require intelligence-led red team scoping; organisations must demonstrate threat-intelligence input (e.g. Mandiant or Group-IB threat profiles) to qualify.
• Purple team exercises directly address ISO/IEC 27001:2022 Annex A 5.7 (threat intelligence) and 8.16 (monitoring activities) by producing documented ATT&CK coverage maps that feed the SIEM tuning backlog.

Evidence sources to capture

What an auditor or reviewer will sample for — wire each source into your evidence repository before the next review cycle:

• Red team final report — attack path narrative, ATT&CK TTP matrix, dwell time, objectives achieved vs. attempted
• SIEM alert log (Splunk/Microsoft Sentinel) — true-positive rate during engagement window, missed detections list
• Purple team runbook — per-technique execution record, detection outcome, tuning action taken, analyst who confirmed
• ATT&CK Navigator layer export — techniques tested (green), detected (yellow), missed (red) for board reporting
• Threat-intelligence brief used for scenario design — actor profile, TTPs mapped to target industry, IOC seed list
• Incident response tickets opened during engagement — response time, escalation path, containment actions

Recommended next actions

A 90-day plan, sequenced so each step produces evidence the next step depends on:

• Day 0–30: CISO maps SOC maturity (staff count, SIEM use-case count, MTTR) against CBEST/TIBER readiness criteria; decides red vs. purple based on whether detection coverage is above 50% of ATT&CK Enterprise.
• Day 31–60: Threat-intelligence team (or vendor) produces actor-profile brief for target sector; red team scopes initial-access scenarios to 3–5 realistic TTPs (e.g. T1566.001 spearphishing, T1078 valid accounts).
• Day 61–90: Execute engagement; purple team mode requires daily sync calls and same-day detection-rule commits in Splunk/Sentinel; red team mode requires full comms blackout until debrief.
• Day 90+: SOC Lead ingests ATT&CK Navigator coverage map into SIEM backlog; targets closing 15–20 detection gaps per quarter from purple exercise outputs.
• Ongoing: Schedule annual red team and quarterly purple team exercises; track detection-coverage percentage in ATT&CK as a KPI reported to the board Risk Committee.

Example metrics

Instrument these and report them monthly to the executive sponsor; sustained adverse trends become board-level conversations:

• Red team dwell time before first detection: target <48 hours (industry average for mature SOCs is 72–120 hours)
• ATT&CK technique detection coverage post-purple exercise: target improvement of ≥20 percentage points per cycle
• SOC true-positive alert rate during purple exercise: target ≥70% of executed techniques generating an alert
• Mean time to detect (MTTD) for simulated lateral movement: target ≤4 hours
• Detection rules created/updated per purple exercise: target ≥10 new or modified Sigma/KQL rules

The executive frame

For an executive sponsor, the decision behind this piece reduces to three questions: what changes in the next two quarters, what is the cost of not acting, and what is the minimum credible response?

Held against your customers' security questionnaires and regulators that require independent penetration testing (PCI DSS 11.4, SAMA, ADGM/DIFC, RBI), the answer is rarely "do nothing" — but it is also rarely "rebuild the programme". The honest answer for most VAPT buyers is a sharply scoped uplift focused on the two indicators that move the most: % of findings retested and closed within 90 days and repeat-finding rate from prior test.

• What changes. The supervisory bar has moved on operating evidence, not on the control text itself.
• Cost of inaction. Findings carried into the next cycle compound; remediation in a regulator-driven timeframe costs 3–5× what proactive remediation costs.
• Minimum credible response. A 90-day uplift focused on the two indicators above, with a board-level commitment to the next review point.

Pitfalls we keep seeing

Across MAST Consulting Group's VAPT portfolio, the same recurring failure modes show up cycle after cycle. None are exotic; all are expensive when they reach the audit report.

• Pattern: findings without business impact, only CVSS scores. What good looks like: the same control evidenced inside the workflow it governs, not separately for the audit.
• Pattern: missing chain-of-attack narrative for critical findings. What good looks like: the same control evidenced inside the workflow it governs, not separately for the audit.
• Pattern: no retest budget agreed up front. What good looks like: the same control evidenced inside the workflow it governs, not separately for the audit.
• Pattern: scope written so loosely it invites scope creep mid-test. What good looks like: the same control evidenced inside the workflow it governs, not separately for the audit.

Tooling we actually reach for

MAST Consulting Group is deliberately tool-agnostic, but in practice the same shortlist keeps appearing on VAPT engagements because the integrations are cheap and the evidence is defensible:

• Nuclei — used not because it is fashionable, but because the audit trail it generates is one the reviewer accepts on the first ask.
• MobSF and Frida (mobile) — used not because it is fashionable, but because the audit trail it generates is one the reviewer accepts on the first ask.
• Postman / OpenAPI fuzzers (APIs) — used not because it is fashionable, but because the audit trail it generates is one the reviewer accepts on the first ask.

How MAST Consulting Group can help

MAST Consulting Group runs VAPT programmes for banks, insurers, healthcare networks, payments providers, telcos and government entities across the UAE, KSA, India and the wider GCC. We bring Lead Practitioners, sector specialists, and a working library of policies, risk methodologies and evidence templates that have passed audit at firms recognisable to your board.

If anything in this briefing is relevant to a programme you are scoping or rescuing, the fastest next step is a 30-minute working session with the practice lead. We will look at your specific situation, share what we have seen work for VAPT programmes at similar scale, and tell you honestly if the work is something you should bring to us or run in-house.