Possible BGP hijack

Beginning at 2021-11-17 00:34:12 UTC, we detected a possible BGP hijack.

Prefix 131.161.96.0/24, is normally announced by AS61789 PORTO SEGURO CIA DE SEGUROS GERAIS, BR.

But beginning at 2021-11-17 00:34:12, the same prefix (131.161.96.0/24) was also announced by ASN 19905.

This was detected by 69 BGPMon peers.

Expected
Start time: 2021-11-17 00:34:12 UTC
Expected prefix: 131.161.96.0/24
Expected ASN: 61789 (PORTO SEGURO CIA DE SEGUROS GERAIS, BR)
Event Details
Detected advertisement: 131.161.96.0/24
Detected Origin ASN 19905 (NEUSTAR-AS6, US)
Detected AS Path 271 6327 22822 19905
Detected by number of BGPMon peers: 69

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