Possible BGP hijack

Beginning at 2020-09-25 15:04:16 UTC, we detected a possible BGP hijack.

Prefix 177.74.240.0/21, is normally announced by AS263653 Costa Esmeralda Net Ltda Me, BR.

But beginning at 2020-09-25 15:04:16, the same prefix (177.74.240.0/21) was also announced by ASN 56046.

This was detected by 24 BGPMon peers.

Expected
Start time: 2020-09-25 15:04:16 UTC
Expected prefix: 177.74.240.0/21
Expected ASN: 263653 (Costa Esmeralda Net Ltda Me, BR)
Event Details
Detected advertisement: 177.74.240.0/21
Detected Origin ASN 56046 (CMNET-JIANGSU-AP China Mobile communications corporation, CN)
Detected AS Path 33891 52320 263444 263444 263444 22356 18881 12956 58453 9808 56046
Detected by number of BGPMon peers: 24

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