Possible BGP hijack

Beginning at 2021-03-12 13:55:15, we detected a possible BGP hijack.

Prefix 72.37.128.0/17, Normally announced by AS3257 GTT-BACKBONE GTT, US

Starting at 2021-03-12 13:55:15, a more specific route (72.37.253.0/24) was announced by ASN 28605.

This was detected by 8 BGPMon peers.

Expected
Start time: 2021-03-12 13:55:15 UTC
Expected prefix: 72.37.128.0/17
Expected ASN: 3257 (GTT-BACKBONE GTT, US)
Event Details
Detected advertisement: 72.37.253.0/24
Detected Origin ASN 28605 (Defferrari Informatica Ltda., BR)
Detected AS Path 28140 28605
Detected by number of BGPMon peers: 8

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