aws instance

Title	Tags
it's possible that a new user will start to modify ec2 instances when they haven't before for any number of reasons. verify with the user that is modifying instances that this is the intended behavior.	t1078.004 aws instance splunk
it's possible that a user has legitimately deleted a network acl.	t1562.007 aws instance splunk
it's possible that an admin has created this acl with all ports open for some legitimate purpose however, this should be scoped and not allowed in production environment.	t1562.007 aws instance splunk
no false positives have been identified at this time.	t1003 t1003.001 t1003.003 t1003.005 t1005 t1012 t1016 t1021 t1021.001 t1027 T1027.011 t1036 t1036.003 t1036.004 t1037.001 t1041 t1046 t1048 t1048.003 t1053 t1053.005 T1053.007 t1055 t1055.001 T1055.002 t1059 t1059.001 t1059.002 t1059.003 t1059.004 t1059.005 t1059.007 t1068 t1069.001 t1069.002 t1070 t1070.004 T1070.008 t1071 t1071.004 t1074 t1078 t1078.004 t1082 t1087 t1087.001 t1087.002 t1087.004 t1090.001 t1090.003 t1098 t1098.003 t1105 t1110 T1110.003 t1112 t1113 t1114.001 t1124 t1127 t1129 t1134 t1134.004 t1134.005 t1185 t1190 t1195 t1200 t1202 t1203 t1204 t1204.002 T1204.003 t1207 t1210 t1212 t1218.005 t1218.007 t1218.010 t1218.011 t1220 t1222 t1222.001 t1482 t1484 t1484.001 t1485 t1486 t1489 t1490 T1497.003 t1498 t1505 t1526 t1529 t1531 t1543 t1546 t1546.001 t1546.002 t1546.011 t1547.003 t1547.005 T1547.012 t1548 t1548.002 t1552.002 t1552.004 t1552.006 t1552.007 t1553.005 t1554 t1555.003 t1555.005 t1556 T1557.002 t1558 T1558.004 t1560 t1560.001 t1562 t1562.001 t1562.004 t1562.006 t1562.008 t1564.001 t1564.004 t1566 t1566.001 t1566.002 t1574.001 T1574.009 T1590.005 t1649 amazon elastic container registry azure tenant circleci aws account o365 tenant github aws instance kubernetes infrastructure network identity windows endpoint splunk
the false-positive rate may vary based on the values of`datapointthreshold` and `deviationthreshold`. additionally, false positives may result when aws administrators roll out policies enforcing network blocks, causing sudden increases in the number of blocked outbound connections.	aws instance splunk
this is a strictly behavioral search, so we define \"false positive\" slightly differently. every time this fires, it will accurately reflect the first occurrence in the time period you're searching within, plus what is stored in the cache feature. but while there are really no \"false positives\" in a traditional sense, there is definitely lots of noise. this search will fire any time a new ip address is seen in the geoip database for any kind of provisioning activity. if you typically do all provisioning from tools inside of your country, there should be few false positives. if you are located in countries where the free version of maxmind geoip that ships by default with splunk has weak resolution (particularly small countries in less economically powerful regions), this may be much less valuable to you.	t1078 aws instance splunk
when a legitimate new user logins for the first time, this activity will be detected. check how old the account is and verify that the user activity is legitimate.	T1535 t1552 t1586.003 aws instance splunk