Originating in Japan, “one (ring) and cut” is a scam that continues to afflict CSPs around the world.
Also known as “ping call” or “spam vocal” (France), usually the scam involves the random automatic dialing of many mobile phones on the CSP’s network.
The Wangiri Fraud Challenge
The number appears as a missed call on a subscriber’s phone. The subscriber, thinking that they missed a legitimate call, or just out of curiosity, is enticed to return the call.
The number they are calling is a premium rate service number, which is facilitating a far more dangerous International Revenue Share Fraud, potentially costing tens of thousands of dollars in just minutes.
How do we solve this problem?
Our solution captures several key characteristics for every B-number range and quickly matches these characteristics with known Wangiri patterns. The module works for Voice and SMS.
The B-number characteristics are captured in a profile made up from A-number diversity, call spread, average call duration (voice), individual call duration (voice) and other statistical measures. Profiles are only maintained while they are active to keep resource usage to a minimum.
The solution integrates the XINTEC hotlist number database to accelerate detection when there is a match. The solution also learns from recent Wangiri fraud attacks to identify countries/ranges most likely to originate future Wangiri fraud attacks and then uses this knowledge to speed identification.