Possible BGP hijack

Beginning at 2018-10-18 01:40:00 UTC, we detected a possible BGP hijack.

Prefix 143.255.197.0/24, is normally announced by AS10 CSNET Coordination and Information Center (CSNET-CIC).

But beginning at 2018-10-18 01:40:00, the same prefix (143.255.197.0/24) was also announced by ASN 5.

This was detected by 18 BGPMon peers.

Expected
Start time: 2018-10-18 01:40:00 UTC
Expected prefix: 143.255.197.0/24
Expected ASN: 10 (CSNET Coordination and Information Center (CSNET-CIC))
Event Details
Detected advertisement: 143.255.197.0/24
Detected Origin ASN 5 (Symbolics, Inc.)
Detected AS Path 11071 3356 3549 263558 5
Detected by number of BGPMon peers: 18

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