Possible BGP hijack

Beginning at 2023-08-29 00:23:19 UTC, we detected a possible BGP hijack.

Prefix 2001:3a8::/32, is normally announced by AS9848 SEJONGTELECOM-AS-KR Sejong Telecom, KR.

But beginning at 2023-08-29 00:23:19, the same prefix (2001:3a8::/32) was also announced by ASN 266970.

This was detected by 2 BGPMon peers.

Expected
Start time: 2023-08-29 00:23:19 UTC
Expected prefix: 2001:3a8::/32
Expected ASN: 9848 (SEJONGTELECOM-AS-KR Sejong Telecom, KR)
Event Details
Detected advertisement: 2001:3a8::/32
Detected Origin ASN 266970 ()
Detected AS Path 202365 50673 33891 3356 4230 61678 266970
Detected by number of BGPMon peers: 2

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