Possible BGP hijack

Beginning at 2023-03-11 15:59:46 UTC, we detected a possible BGP hijack.

Prefix 31.187.78.0/24, is normally announced by AS136787 TEFINCOMSA-AS-AP TEFINCOM S.A., PA.

But beginning at 2023-03-11 15:59:46, the same prefix (31.187.78.0/24) was also announced by ASN 12400.

This was detected by 4 BGPMon peers.

Expected
Start time: 2023-03-11 15:59:46 UTC
Expected prefix: 31.187.78.0/24
Expected ASN: 136787 (TEFINCOMSA-AS-AP TEFINCOM S.A., PA)
Event Details
Detected advertisement: 31.187.78.0/24
Detected Origin ASN 12400 (PARTNER-AS, IL)
Detected AS Path 49134 53356 6939 6762 9116 12400
Detected by number of BGPMon peers: 4

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