Possible BGP hijack

Beginning at 2021-12-01 20:11:58, we detected a possible BGP hijack.

Prefix 13.13.0.0/17, Normally announced by AS22390 XEROX-WB, US

Starting at 2021-12-01 20:11:58, a more specific route (13.13.13.0/24) was announced by ASN 52871.

This was detected by 4 BGPMon peers.

Expected
Start time: 2021-12-01 20:11:58 UTC
Expected prefix: 13.13.0.0/17
Expected ASN: 22390 (XEROX-WB, US)
Event Details
Detected advertisement: 13.13.13.0/24
Detected Origin ASN 52871 (TASCOM TELECOMUNICACOES LTDA, BR)
Detected AS Path 263287 52871
Detected by number of BGPMon peers: 4

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