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Incident Response Guide

Critical response actions for security breaches and compromised data. When you discover a breach, time is critical.

Critical
Security breaches require immediate attention. The first 24 hours determine the effectiveness of your response.
Immediate Response Timeline
Critical actions organized by urgency and impact
First 15 Minutes
  • Change compromised passwords
  • Enable 2FA if not active
  • Check for suspicious activity
  • Secure critical accounts
First Hour
  • Notify affected parties
  • Document the incident
  • Review breach scope
  • Monitor for abuse
First 24 Hours
  • Comprehensive audit
  • Security posture review
  • Policy updates
  • Long-term monitoring

Response by Data Type Compromised

Email & Password Compromised
Most common breach type. Immediate credential rotation required.

Immediate Actions (0-15 minutes)

  1. 1Change password on the compromised service immediately
  2. 2Change password on all services using the same credentials
  3. 3Enable two-factor authentication everywhere possible
  4. 4Check email account for unauthorized access

Follow-up Actions (1-24 hours)

  1. 5Review email forwarding rules and filters
  2. 6Check for new account registrations using your email
  3. 7Implement password manager with unique passwords
  4. 8Monitor for suspicious activity for 30 days
Personal Information (Email, Phone, Username)
Account compromise risk. Monitoring and documentation essential.

Immediate Actions (0-1 hour)

  1. 1Document all compromised information types
  2. 2Place fraud alerts with credit bureaus
  3. 3Monitor financial accounts for suspicious activity
  4. 4Contact your bank and credit card companies

Extended Actions (1-7 days)

  1. 5File identity theft report with FTC
  2. 6Consider credit freeze with all bureaus
  3. 7Set up identity monitoring services
  4. 8Review and update privacy settings on all accounts

Response by Breach Source Type

Database Breach
Large-scale server compromise. Structured data exposure.

Characteristics:

  • Large number of affected users from single source
  • Structured data with consistent field types
  • Often includes encrypted/hashed passwords
  • May contain extensive personal information

Response Strategy:

  1. 1Verify authenticity: Check if the breach is confirmed by the service provider
  2. 2Assess data sensitivity: Review what specific fields were compromised
  3. 3Check password hashing: Determine if passwords were properly secured
  4. 4Monitor official communications: Follow company updates and required actions
Stealer Log (Malware)
Malware-extracted data. Often includes system information and real-time credentials.
Warning
Stealer logs indicate active malware infection. System compromise likely.

Characteristics:

  • Contains login credentials from infected devices
  • Recent/current credentials from compromised systems
  • Browser data, cookies, saved passwords
  • Often includes cryptocurrency wallet data

Critical Response Actions:

  1. 1Isolate infected systems: Disconnect from network immediately
  2. 2Change all credentials: Assume all saved passwords are compromised
  3. 3Secure cryptocurrency assets: Move funds to new wallets immediately
  4. 4Full system remediation: Professional malware removal or complete rebuild
  5. 5Network security audit: Check for lateral movement within organization

Response by User Type

Personal Account

Priority Actions:

  • Change password immediately
  • Enable 2FA on all accounts
  • Review account activity
  • Monitor for identity theft

Family Considerations:

  • • Notify family members if shared accounts affected
  • • Check children's accounts for unauthorized access
  • • Review joint financial accounts
  • • Update emergency contact information
Corporate Account

Immediate Escalation:

  • Notify IT security team immediately
  • Follow incident response procedures
  • Document all affected systems
  • Assess regulatory reporting requirements

Business Continuity:

  • • Implement emergency access procedures
  • • Coordinate with legal and compliance teams
  • • Prepare stakeholder communications
  • • Review cyber insurance coverage
Administrator Account
Critical system access compromised
Administrator compromise can affect entire infrastructure.

Emergency Response:

  1. 1Disable compromised admin account immediately
  2. 2Revoke all active sessions and API keys
  3. 3Audit all recent administrative actions
  4. 4Review access logs for unauthorized changes
  5. 5Implement emergency access protocols
Family Member Account

Coordinated Response:

  • Contact family member immediately
  • Guide them through security steps
  • Check for shared account impact
  • Document family-wide security review

Protection Strategy:

  • • Review all shared family accounts
  • • Update emergency contact methods
  • • Implement family password manager
  • • Schedule regular security awareness discussions
Data Removal Services

If your personal information appears in breach data and you need it removed from our database, we provide a verified data removal process that protects your privacy while maintaining platform integrity.

Learn About Data RemovalSubmit Removal Request
Emergency Support
When every second counts, get immediate assistance

Critical Incident Support

Create urgent support ticket
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Support Guide

Response Time Expectations

Critical incidents:15-30 minutes
High priority:1-2 hours
Standard support:4-8 hours
After Initial Response
Long-term security posture improvements

Security Hardening

  • Implement password manager across all accounts
  • Enable 2FA on all critical services
  • Regular security training and awareness
  • Implement continuous monitoring solutions

Ongoing Monitoring

  • Set up breach monitoring alerts
  • Regular dark web monitoring
  • Quarterly security assessments
  • Identity theft monitoring services
Documentation - LeakZero | LeakZero