Possible BGP hijack

Beginning at 2020-05-20 19:09:54 UTC, we detected a possible BGP hijack.

Prefix 181.191.193.0/24, is normally announced by AS267457 INTERMAX INTERNET LTDA, BR.

But beginning at 2020-05-20 19:09:54, the same prefix (181.191.193.0/24) was also announced by ASN 267973.

This was detected by 112 BGPMon peers.

Expected
Start time: 2020-05-20 19:09:54 UTC
Expected prefix: 181.191.193.0/24
Expected ASN: 267457 (INTERMAX INTERNET LTDA, BR)
Event Details
Detected advertisement: 181.191.193.0/24
Detected Origin ASN 267973 (G.V.R. TELECOMUNICACOES E SERVICOS LTDA - ME, BR)
Detected AS Path 8781 1299 7738 8167 267973
Detected by number of BGPMon peers: 112

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