Possible BGP hijack

Beginning at 2020-02-04 17:33:54, we detected a possible BGP hijack.

Prefix 172.0.0.0/12, Normally announced by AS7018 ATT-INTERNET4, US

Starting at 2020-02-04 17:33:54, a more specific route (172.0.0.0/16) was announced by ASN 270308.

This was detected by 6 BGPMon peers.

Expected
Start time: 2020-02-04 17:33:54 UTC
Expected prefix: 172.0.0.0/12
Expected ASN: 7018 (ATT-INTERNET4, US)
Event Details
Detected advertisement: 172.0.0.0/16
Detected Origin ASN 270308 (MUNICIPIO DE MACAE, BR)
Detected AS Path 28292 53062 262589 52639 270308
Detected by number of BGPMon peers: 6

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