Audit message examples
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You can find detailed information in each audit message. All audit messages use the same format.
The following is a sample audit message as it might appear in the audit.log file:
2014-07-17T21:17:58.959669 [AUDT:[RSLT(FC32):SUCS][TIME(UI64):246979][S3AI(CSTR):"bc644d 381a87d6cc216adcd963fb6f95dd25a38aa2cb8c9a358e8c5087a6af5f"][ S3AK(CSTR):"UJXDKKQOXB7YARDS71Q2"][S3BK(CSTR):"s3small1"][S3K Y(CSTR):"hello1"][CBID(UI64):0x50C4F7AC2BC8EDF7][CSIZ(UI64):0 ][AVER(UI32):10][ATIM(UI64):1405631878959669][ATYP(FC32):SPUT ][ANID(UI32):12872812][AMID(FC32):S3RQ][ATID(UI64):1579224144 102530435]]
The audit message contains information about the event being recorded, as well as information about the audit message itself.
To identify which event is recorded by the audit message, look for the ATYP attribute (highlighted below):
2014-07-17T21:17:58.959669 [AUDT:[RSLT(FC32):SUCS][TIME(UI64):246979][S3AI(CSTR):"bc644d 381a87d6cc216adcd963fb6f95dd25a38aa2cb8c9a358e8c5087a6af5f"][ S3AK(CSTR):"UJXDKKQOXB7YARDS71Q2"][S3BK(CSTR):"s3small1"][S3K Y(CSTR):"hello1"][CBID(UI64):0x50C4F7AC2BC8EDF7][CSIZ(UI64):0 ][AVER(UI32):10][ATIM(UI64):1405631878959669][ATYP\(FC32\):SP UT][ANID(UI32):12872812][AMID(FC32):S3RQ][ATID(UI64):1579224 144102530435]]
The value of the ATYP attribute is SPUT. SPUT represents an S3 PUT transaction, which logs the ingest of an object to a bucket.
The following audit message also shows the bucket to which the object is associated:
2014-07-17T21:17:58.959669 [AUDT:[RSLT(FC32):SUCS][TIME(UI64):246979][S3AI(CSTR):"bc644d 381a87d6cc216adcd963fb6f95dd25a38aa2cb8c9a358e8c5087a6af5f"][ S3AK(CSTR):"UJXDKKQOXB7YARDS71Q2"][S3BK\(CSTR\):"s3small1"][S3 KY(CSTR):"hello1"][CBID(UI64):0x50C4F7AC2BC8EDF7][CSIZ(UI64): 0][AVER(UI32):10][ATIM(UI64):1405631878959669][ATYP(FC32):SPU T][ANID(UI32):12872812][AMID(FC32):S3RQ][ATID(UI64):157922414 4102530435]]
To discover when the PUT event occurred, note the Universal Coordinated Time (UTC) timestamp at the beginning of the audit message. This value is a human‐readable version of the ATIM attribute of the audit message itself:
2014-07-17T21:17:58.959669 [AUDT:[RSLT(FC32):SUCS][TIME(UI64):246979][S3AI(CSTR):"bc644d 381a87d6cc216adcd963fb6f95dd25a38aa2cb8c9a358e8c5087a6af5f"][ S3AK(CSTR):"UJXDKKQOXB7YARDS71Q2"][S3BK(CSTR):"s3small1"][S3K Y(CSTR):"hello1"][CBID(UI64):0x50C4F7AC2BC8EDF7][CSIZ(UI64):0 ][AVER(UI32):10][ATIM\(UI64\):1405631878959669][ATYP(FC32):SP UT][ANID(UI32):12872812][AMID(FC32):S3RQ][ATID(UI64):15792241 44102530435]]
ATIM records the time, in microseconds, since the beginning of the UNIX epoch. In the example, the value 1405631878959669 translates to Thursday, 17-Jul-2014 21:17:59 UTC.