Possible BGP hijack

Beginning at 2024-02-06 12:44:32 UTC, we detected a possible BGP hijack.

Prefix 122.154.20.0/24, is normally announced by AS133761 FORESTTH-AS-AP Mr. Naphat, TH.

But beginning at 2024-02-06 12:44:32, the same prefix (122.154.20.0/24) was also announced by ASN 39891.

This was detected by 2 BGPMon peers.

Expected
Start time: 2024-02-06 12:44:32 UTC
Expected prefix: 122.154.20.0/24
Expected ASN: 133761 (FORESTTH-AS-AP Mr. Naphat, TH)
Event Details
Detected advertisement: 122.154.20.0/24
Detected Origin ASN 39891 (ALJAWWALSTC-AS, SA)
Detected AS Path 63956 6939 4651 9931 133761
Detected by number of BGPMon peers: 2

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