Security Incident Response Runbook¶

Procedures for handling security incidents including credential exposure, unauthorized access, and security policy violations.

Severity Classification¶

API Key/Secret Exposure¶

Symptoms¶

• Secrets found in logs, code commits, or public repositories
• Unexpected API calls from unknown sources
• Exchange reporting unusual activity

Immediate Actions (P1)¶

1. Identify exposed credentials:

   # Check what was exposed
   # - Exchange API keys (Binance, etc.)
   # - AWS credentials
   # - Database passwords
   # - JWT signing keys
   

2. Rotate exchange API keys immediately:

   # 1. Create new API key on exchange (manually via exchange UI)
   # 2. Update Secrets Manager
   aws secretsmanager put-secret-value \
     --secret-id tradai/${ENVIRONMENT}/exchange-keys \
     --secret-string '{"api_key":"NEW_KEY","api_secret":"NEW_SECRET"}'
   
   # 3. Restart services to pick up new credentials
   aws ecs update-service \
     --cluster tradai-${ENVIRONMENT} \
     --service tradai-strategy-service-${ENVIRONMENT} \
     --force-new-deployment
   

3. Revoke old exchange keys (via exchange UI)

4. Check for unauthorized activity:

   # Review exchange order history for unauthorized trades
   # Review API call logs for suspicious patterns
   

AWS Credential Rotation¶

If AWS credentials exposed:

1. Disable compromised credentials:

   # For IAM user access keys
   aws iam update-access-key \
     --user-name $USER_NAME \
     --access-key-id $COMPROMISED_KEY_ID \
     --status Inactive
   
   # For IAM user
   aws iam delete-login-profile --user-name $USER_NAME
   

2. Create new credentials:

   aws iam create-access-key --user-name $USER_NAME
   

3. Review CloudTrail for unauthorized actions:

   aws cloudtrail lookup-events \
     --lookup-attributes AttributeKey=AccessKeyId,AttributeValue=$COMPROMISED_KEY_ID \
     --start-time $(date -u -v-24H +%Y-%m-%dT%H:%M:%SZ)
   

4. Delete compromised credentials (after verification):

   aws iam delete-access-key \
     --user-name $USER_NAME \
     --access-key-id $COMPROMISED_KEY_ID
   

JWT Token Invalidation¶

If JWT signing key compromised:

1. Rotate Cognito app client secret:

   # Generate new client secret
   aws cognito-idp update-user-pool-client \
     --user-pool-id $USER_POOL_ID \
     --client-id $CLIENT_ID \
     --generate-secret
   

2. Force sign-out all users:

   aws cognito-idp admin-user-global-sign-out \
     --user-pool-id $USER_POOL_ID \
     --username $USERNAME
   

Unauthorized Access Detected¶

Symptoms¶

• Unexpected IAM activity in CloudTrail
• Unknown IP addresses in access logs
• Privilege escalation attempts
• Resource creation outside normal patterns

Diagnosis¶

1. Review CloudTrail events:

   # Recent suspicious events
   aws cloudtrail lookup-events \
     --lookup-attributes AttributeKey=EventName,AttributeValue=CreateAccessKey \
     --start-time $(date -u -v-24H +%Y-%m-%dT%H:%M:%SZ) \
     --query 'Events[*].{Time:EventTime,User:Username,Event:EventName,Source:EventSource}'
   

2. Check for new IAM users/roles:

   # List recently created users
   aws iam list-users \
     --query "Users[?CreateDate>='$(date -u -v-7d +%Y-%m-%dT%H:%M:%SZ)']"
   
   # List recently created roles
   aws iam list-roles \
     --query "Roles[?CreateDate>='$(date -u -v-7d +%Y-%m-%dT%H:%M:%SZ)']"
   

3. Check API Gateway access logs:

   aws logs filter-log-events \
     --log-group-name /aws/api-gateway/tradai-${ENVIRONMENT} \
     --start-time $(date -u -v-24H +%s)000 \
     --filter-pattern '{ $.status = 401 || $.status = 403 }'
   

ECS Task Isolation¶

If a container is suspected compromised:

1. Stop the suspicious task:

   aws ecs stop-task \
     --cluster tradai-${ENVIRONMENT} \
     --task $TASK_ARN \
     --reason "Security incident investigation"
   

2. Update security group to deny all egress (preserve for forensics):

   # Create isolated security group
   aws ec2 create-security-group \
     --group-name tradai-isolated-${ENVIRONMENT} \
     --description "Isolated for security investigation" \
     --vpc-id $VPC_ID
   
   # No ingress or egress rules - fully isolated
   

3. Capture task logs for forensics:

   aws logs get-log-events \
     --log-group-name /ecs/tradai-${SERVICE_NAME}-${ENVIRONMENT} \
     --log-stream-name $LOG_STREAM \
     --start-time $(date -u -v-24H +%s)000 \
     --output json > forensics-logs-$(date +%Y%m%d).json
   

Network Security Breach¶

Symptoms¶

• Unexpected outbound connections
• Data exfiltration attempts in VPC Flow Logs
• Unusual traffic patterns

Diagnosis¶

1. Check VPC Flow Logs:

   aws logs filter-log-events \
     --log-group-name /aws/vpc/flowlogs/tradai-${ENVIRONMENT} \
     --start-time $(date -u -v-24H +%s)000 \
     --filter-pattern '[version, accountid, interfaceid, srcaddr, dstaddr, srcport, dstport, protocol, packets, bytes, start, end, action=REJECT, logstatus]'
   

2. Look for unexpected destinations:

   # Check for traffic to unexpected IPs
   aws logs filter-log-events \
     --log-group-name /aws/vpc/flowlogs/tradai-${ENVIRONMENT} \
     --start-time $(date -u -v-1H +%s)000 \
     --filter-pattern '[version, accountid, interfaceid, srcaddr, dstaddr != 10.*, srcport, dstport, protocol, packets, bytes, start, end, action=ACCEPT, logstatus]'
   

Containment¶

1. Block suspicious IPs via WAF:

   # Get WAF Web ACL
   WAF_ACL_ID=$(aws wafv2 list-web-acls --scope REGIONAL --query "WebACLs[?Name=='tradai-${ENVIRONMENT}-waf'].Id" --output text)
   
   # Add IP to block list (requires updating WAF rule)
   

2. Update security group to block IP:

   # Add deny rule to NACL for immediate block
   aws ec2 create-network-acl-entry \
     --network-acl-id $NACL_ID \
     --rule-number 50 \
     --protocol -1 \
     --rule-action deny \
     --egress \
     --cidr-block $SUSPICIOUS_IP/32
   

CloudTrail Audit Analysis¶

Common Queries¶

Failed API calls:

aws cloudtrail lookup-events \
  --lookup-attributes AttributeKey=ReadOnly,AttributeValue=false \
  --start-time $(date -u -v-24H +%Y-%m-%dT%H:%M:%SZ) \
  --query 'Events[?ErrorCode!=`null`].{Time:EventTime,Event:EventName,Error:ErrorCode,User:Username}'

Root account activity (should be rare):

aws cloudtrail lookup-events \
  --lookup-attributes AttributeKey=Username,AttributeValue=root \
  --start-time $(date -u -v-7d +%Y-%m-%dT%H:%M:%SZ)

IAM policy changes:

aws cloudtrail lookup-events \
  --start-time $(date -u -v-24H +%Y-%m-%dT%H:%M:%SZ) \
  --query 'Events[?contains(EventName, `Policy`)].{Time:EventTime,Event:EventName,User:Username}'

Security group changes:

aws cloudtrail lookup-events \
  --lookup-attributes AttributeKey=EventSource,AttributeValue=ec2.amazonaws.com \
  --start-time $(date -u -v-24H +%Y-%m-%dT%H:%M:%SZ) \
  --query 'Events[?contains(EventName, `SecurityGroup`)].{Time:EventTime,Event:EventName,User:Username}'

Post-Incident Actions¶

Immediate (within 1 hour)¶

• [ ] Contain the incident (rotate credentials, isolate resources)
• [ ] Preserve evidence (logs, configurations, artifacts)
• [ ] Notify stakeholders (team lead, security contact)
• [ ] Document initial findings

Short-term (within 24 hours)¶

• [ ] Complete root cause analysis
• [ ] Verify all compromised credentials rotated
• [ ] Review all related resources for tampering
• [ ] Check for persistence mechanisms (backdoors, new users/keys)
• [ ] Update WAF/security group rules as needed

Long-term (within 7 days)¶

• [ ] Write incident report with timeline
• [ ] Identify and implement preventive measures
• [ ] Update runbooks with lessons learned
• [ ] Review and update monitoring/alerting
• [ ] Conduct team debrief

Emergency Contacts¶

Verification Checklist¶

After security incident resolution:

• [ ] All compromised credentials rotated
• [ ] Unauthorized access terminated
• [ ] No persistent backdoors found
• [ ] CloudTrail showing normal activity
• [ ] VPC Flow Logs clean
• [ ] Services operating normally
• [ ] Monitoring alerts configured for recurrence
• [ ] Incident documented and reported