topic Converting Active Directory Time Fields in Getting Data In

Converting Active Directory Time Fields

ogdin — Thu, 02 Sep 2010 06:30:01 GMT

AD stores certain fields like:

pwdLastSet

in a large integer format. How can I convert these to a human readable time format using Splunk?

Examples:

129290832000000000 129278238808929391

Re: Converting Active Directory Time Fields

gkanapathy — Thu, 02 Sep 2010 06:54:35 GMT

Looks to me like this, for example, would work:

... | eval human_time=strftime(pwdLastSet/1000000000,"%Y-%m-%d %H:%M:%S")

Re: Converting Active Directory Time Fields

ogdin — Thu, 02 Sep 2010 20:18:12 GMT

Close. Windows uses NT epoch. Below should work.

... | eval human_time=strftime(pwdLastSet/10000000-11644473600,"%Y-%m-%d %H:%M:%S")

Re: Converting Active Directory Time Fields

gkanapathy — Thu, 02 Sep 2010 21:47:13 GMT

Some parts of Windows uses NT epoch, which are based off 01/01/1601 00:00:00, but others (.NET-based mostly) use MS Ticks, which are 10^-7 seconds since 01/01/0001 00:00:00. (Using which calendar, I do not know.)

Re: Converting Active Directory Time Fields

ogdin — Fri, 03 Sep 2010 03:14:23 GMT

Yes. I should have qualified that. This specific field in the AD logs use NT epoch. Thanks.