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API Reference: Implementing Honeypot for Ransomware Detection
Canary File Strategy
| Name Pattern | Extension | Purpose |
|---|---|---|
!Accounting_* |
.docx, .xlsx | Sorted first alphabetically |
~$Confidential_* |
.pdf, .csv | Mimics temp/open Office files |
!Payroll_* |
.xlsx, .bak | High-value bait |
Integrity Monitoring
import hashlib
from pathlib import Path
content = Path("canary.docx").read_bytes()
sha256 = hashlib.sha256(content).hexdigest()
Ransomware Extension Indicators
| Extension | Ransomware Family |
|---|---|
.encrypted |
Generic |
.locked |
LockBit, GandCrab |
.crypto |
CryptoLocker variants |
.ransom |
Generic |
.enc |
Various |
Samba Honeypot Share (full_audit VFS)
[FinanceArchive]
path = /srv/honeypot
vfs objects = full_audit
full_audit:success = open opendir write rename unlink
full_audit:failure = open
full_audit:facility = LOCAL7
full_audit:priority = NOTICE
Thinkst Canary API
# List incidents
curl "https://DOMAIN.canary.tools/api/v1/incidents/all" \
-d auth_token=TOKEN
# Acknowledge incident
curl "https://DOMAIN.canary.tools/api/v1/incident/acknowledge" \
-d auth_token=TOKEN -d incident=INC_ID
Detection Thresholds
| Metric | Threshold | Severity |
|---|---|---|
| Files modified in 60s | > 50 | CRITICAL |
| Canary file deleted | Any | CRITICAL |
| Canary hash changed | Any | CRITICAL |
| Known ransom extensions | Any | CRITICAL |
References
- Thinkst Canary: https://canary.tools/
- CISA Ransomware Guide: https://www.cisa.gov/stopransomware
- Canarytokens: https://canarytokens.org/