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[DELINEA] Failed Publickey [Brute Force] [10/1]

[DELINEA] Failed Publickey [Brute Force] [10/1]

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Detection Logic

alert any $EXTERNAL_NET any -> $HOME_NET any (msg:"[DELINEA] Failed Publickey [Brute Force] [10/1]"; content: "centrifyEventID
| 3d
| 27101"; nocase; content: "reason
| 3d
| AUTH
| 5f
| FAIL
| 5f
| PUBKEY"; nocase; parse_src_ip: 1; default_proto: tcp; default_dst_port: $SSH_PORT; after: track by_src, count 10, seconds 300; threshold: type suppress, track by_src, count 1, seconds 300; xbits: set,brute_force,track ip_src, expire 21600; classtype: brute-force; program: adclient; sid:  5004301; rev:2;)

Field Validations

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