Possible BGP hijack

Beginning at 2020-03-13 08:08:10 UTC, we detected a possible BGP hijack.

Prefix 1.18.121.0/24, is normally announced by AS23599 DDNSKR-KR Korea Internet Security Agency, KR.

But beginning at 2020-03-13 08:08:10, the same prefix (1.18.121.0/24) was also announced by ASN 24143.

This was detected by 4 BGPMon peers.

Expected
Start time: 2020-03-13 08:08:10 UTC
Expected prefix: 1.18.121.0/24
Expected ASN: 23599 (DDNSKR-KR Korea Internet Security Agency, KR)
Event Details
Detected advertisement: 1.18.121.0/24
Detected Origin ASN 24143 (CNNIC-QCN-AP Qingdao Cable TV Network Center, CN)
Detected AS Path 38987 20804 4134 4847 24143
Detected by number of BGPMon peers: 4

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