# Playbook: Threat Prioritization & Automated Response Strategies

### 🚨 **Critical Priority (Immediate Response Required)**

#### **High-Severity Cyberattacks & Active Threats**

* **Ransomware Attack Detected** – Mass file encryption & extortion attempts.
  * 🚀 *Response:* Endpoint isolation, process termination, backup verification, & forensic analysis.
* **DC Sync Attack** – Credential theft via **Active Directory replication abuse**.
  * 🚀 *Response:* Block unauthorized replication requests, revoke permissions, and investigate compromised accounts.
* **Pass-the-Hash (PtH) / Token Abuse** – NTLM authentication misuse for lateral movement.
  * 🚀 *Response:* Disable compromised credentials, block unauthorized NTLM authentication attempts, enforce MFA.
* **Phishing Campaign with Malware / Credential Theft** – Leading to system compromise.
  * 🚀 *Response:* Email quarantine, endpoint scanning, user credential reset, phishing simulation training.
* **Remote Code Execution (RCE) Exploit Detected** – Unpatched system targeted in attack.
  * 🚀 *Response:* Patch immediately, isolate affected systems, investigate attacker actions, check exploit databases.
* **Data Exfiltration via DNS Tunneling or Cloud Storage Misconfigurations**.
  * 🚀 *Response:* Block suspicious DNS queries, audit cloud permissions, investigate unauthorized data transfers.
* **Privileged Account Compromise** – Enabling unauthorized transactions or system modifications.
  * 🚀 *Response:* Immediate privilege revocation, forensic investigation, identity validation, monitor privilege escalation attempts.
* **Web Shell Installation on Public-Facing Servers** – **Persistence threat detected**.
  * 🚀 *Response:* Remove web shell, analyze attacker access patterns, audit server configurations, monitor for follow-up attacks.
* **Malware Beaconing to Command-and-Control (C2) Infrastructure**.
  * 🚀 *Response:* Terminate beaconing process, block malicious domains/IPs, check other endpoints for infection.
* **Active Directory Privilege Escalation & Lateral Movement** – Stolen credentials used to **compromise domain infrastructure**.
  * 🚀 *Response:* Audit privilege escalation paths, monitor Kerberos ticket abuse, investigate unauthorized admin access.

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### ⚠️ **High Priority (Urgent Investigation Required)**

#### **Potential Security Breaches & Exploit Attempts**

* **Impossible Travel Logins & Geo-Based Authentication Anomalies**.
  * 🚀 *Response:* Validate user identity, enforce MFA, block high-risk sessions.
* **Suspicious MFA Failure Attempts** – Focused attack on sensitive accounts.
  * 🚀 *Response:* Investigate affected accounts, restrict privilege escalation paths, enforce MFA resets.
* **Privilege Escalation Attempt on Domain Controllers or Admin Accounts**.
  * 🚀 *Response:* Audit account changes, track NTLM/Kerberos authentication patterns, block escalation.
* **Unauthorized API Access / Token Abuse** – Financial or authentication service breach.
  * 🚀 *Response:* Disable misused API keys, enforce OAuth access control, review security logs for unusual API activity.
* **Web Application Firewall (WAF) Alerts** – **SQL Injection or Cross-Site Scripting (XSS) Attempt**.
  * 🚀 *Response:* Investigate affected applications, patch vulnerabilities, enhance web security monitoring.
* **User Login Anomalies** – Multiple failed login attempts in a short time.
  * 🚀 *Response:* Review credential stuffing indicators, monitor account lockout events, enforce CAPTCHA/MFA.
* **Exploit Code Publicly Available for Active Vulnerability**.
  * 🚀 *Response:* Cross-reference CVE databases, confirm exploit attempts, validate immediate patch availability.
* **Unusual Kerberos Ticket Granting Ticket (TGT) Activity** – Possible **credential forgery** attack.
  * 🚀 *Response:* Investigate forged tickets, enforce strict Kerberos authentication policies, scan for compromised admin accounts.
* **Abnormal Network Traffic Spikes** – Possible DDoS attack or flooding attempt.
  * 🚀 *Response:* Rate-limit traffic, investigate attacker IP sources, alert ISP for mitigation.
* **Automated Credential Stuffing Attack** – Repeated brute-force login attempts detected.
  * 🚀 *Response:* Apply account lockout policies, block attacker IP ranges, enforce CAPTCHA-based authentication.

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### 📌 **Medium Priority (Security Review Needed)**

#### **Insider Threats, Policy Violations & Suspicious Activity**

* **Insider Threat – Privileged User Abusing Access for Data Theft**.
  * 🚀 *Response:* Audit data access logs, monitor user behavior deviations, implement least privilege enforcement.
* **Unauthorized Email Forwarding Rules Created** – Possible **data leakage attempt**.
  * 🚀 *Response:* Review email security settings, disable suspicious forwarding, train employees on phishing detection.
* **Excessive Failed Login Attempts Across Multiple Employee Accounts**.
  * 🚀 *Response:* Investigate potential phishing campaigns or brute-force credential attacks.
* **Suspicious PowerShell or Bash Script Execution on Critical Servers**.
  * 🚀 *Response:* Scan for unauthorized scripts, block execution of known malicious script patterns, enforce script-signing policies.
* **Weak TLS Configuration Detected** – Outdated encryption standards in use.
  * 🚀 *Response:* Upgrade TLS settings, enforce strong cipher suites, ensure encryption compliance with industry standards.

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### 🛠 **Low Priority (Routine Monitoring & Alerts)**

#### **Security Hygiene, Configuration Issues & General Threat Awareness**

* **Unoptimized Security Policies Affecting Cloud-Based Access Controls**.
  * 🚀 *Response:* Review IAM permissions, enforce zero-trust access policies.
* **Use of Outdated Third-Party Libraries with Known Vulnerabilities**.
  * 🚀 *Response:* Identify vulnerable dependencies, enforce automated patching cycles.
* **Improper Session Timeout Leading to Unintended Account Access**.
  * 🚀 *Response:* Modify session timeout settings, restrict unauthenticated idle time.
* **Excessive Failed File Access Attempts Without Privileges**.
  * 🚀 *Response:* Investigate unauthorized access attempts, restrict access permissions.
* **Debug Logs Containing Non-Sensitive System Information**.
  * 🚀 *Response:* Ensure debug logs do not expose system internals to external actors.

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