Possible BGP hijack

Beginning at 2020-06-01 13:58:00, we detected a possible BGP hijack.

Prefix 170.109.120.0/21, Normally announced by AS7018 ATT-INTERNET4, US

Starting at 2020-06-01 13:58:00, a more specific route (170.109.120.0/22) was announced by ASN 266989.

This was detected by 10 BGPMon peers.

Expected
Start time: 2020-06-01 13:58:00 UTC
Expected prefix: 170.109.120.0/21
Expected ASN: 7018 (ATT-INTERNET4, US)
Event Details
Detected advertisement: 170.109.120.0/22
Detected Origin ASN 266989 (ETH ENTERPRISE TECNOLOGIA LTDA, BR)
Detected AS Path 208662 1299 3356 3549 53013 53013 266989
Detected by number of BGPMon peers: 10

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