Wangiri vs IRSF
Wangiri ("one ring and cut") and International Revenue Share Fraud (IRSF) both monetize premium-rate international numbers. Wangiri baits the victim into calling back; IRSF originates the calls from compromised PBX or SIM-box infrastructure.
| Attribute | Wangiri | IRSF |
|---|---|---|
| Origination | Victim initiates callback | Compromised PBX / stolen credentials |
| Volume model | Broad missed-call sweeps | Concentrated call generation |
| Detection window | Callback minutes after bait | Minutes to hours from origination |
| Loss bearer | End subscriber | Enterprise / operator |
| Common defense | Missed-call filtering, subscriber warnings | PBX hardening, real-time CDR anomaly detection |
Verdict
Both feed the same revenue-share ecosystem, but they target different pockets. Anti-fraud stacks that only watch outbound minute spikes catch IRSF and miss Wangiri; those that only warn subscribers catch Wangiri and miss IRSF.