CERT-In advisory CIAD-2026-0058 (4 November 2026) describes a threat actor called Crafty Falcon that uses AI-assisted tooling against NBFCs, fintechs, payment aggregators and crypto exchanges. The interesting part for engineers is the attack path: it is mostly about environment hygiene and API design, not exotic exploits.

The attack path in short

  • Entry through internet-exposed UAT/staging servers, file-upload and deserialisation bugs, hardcoded API tokens and services without MFA
  • Pivot to production through credentials, tokens or network routes shared with test
  • Command execution through cloud control-plane services such as AWS Systems Manager and Lambda
  • Direct API calls from reverse-engineered apps, with traffic routed through trusted third-party IP ranges to pass allow-lists
  • A Rs 1 test transfer, then large transfers to mule accounts

Engineering fixes

  • Environment isolation: no shared credentials, keys, databases or routes between test and prod; alert on any test-to-prod access
  • Server-side validation: treat the client as untrusted, sign API requests, and replace IP allow-lists with identity-based controls such as mutual TLS or scoped keys
  • Secrets: scan repos and CI/CD pipelines for hardcoded secrets, rotate them, and switch to short-lived, narrowly scoped tokens
  • Patching: fix file-upload and deserialisation flaws in internet-facing apps first; use WAF virtual patching only as a stopgap; make app folders read-only and monitor file integrity for web shells

Monitoring and fraud rules

  • Real-time alerts on remote command execution, production serverless changes, and new users, roles or access keys
  • Restrict outbound traffic from servers
  • Flag a small transfer to a new beneficiary followed by a large one; add velocity limits and maker-checker approval for merchant settlements
  • Keep 24x7 coverage with lower thresholds on weekends and holidays, and confirm clean-up with forensic checks before closing an incident

More detail: the full Crafty Falcon advisory breakdown and eight-step response plan

Written by the team at Affix Center, an IT services company in Lower Parel, Mumbai.