t1037 | LoFP

t1037

Title	Tags
infrastructure-as-code, configuration management, and patching automation routinely create, update, and delete vm extensions. the first time a given extension resource name is operated on from a new source as number will alert. baseline expected management networks (corporate egress, ci/cd runners, third-party automation saas) and exclude their as numbers if the activity is verified as authorized. read operations are typically not emitted to the azure activity log; the rule predominantly fires on write and delete.	t1037 T1651 azure elastic
investigate the contents of the \"userinitmprlogonscript\" value to determine of the added script is legitimate	t1037 t1037.001 windows sigma
legitimate addition of logon scripts via the command line by administrators or third party tools	t1037 t1037.001 windows sigma
legitimate administration activities	t1007 t1016 t1018 t1033 t1037 t1037.005 t1040 t1046 t1053 t1053.002 t1053.003 t1059 t1059.012 t1069 t1069.001 t1070 t1070.004 t1078 t1078.003 t1082 t1087 t1087.001 t1090 t1098 t1105 t1136 t1136.001 t1140 t1201 t1489 t1518 t1518.001 t1529 t1546 t1546.014 t1548 t1548.001 t1552 t1552.001 t1553 t1553.004 t1555 t1555.001 t1564 t1564.002 t1565 t1565.001 t1592 t1592.004 t1685 t1685.006 t1686 linux windows macos sigma
legitimate administrative activity	t1037 t1484 t1547 windows elastic
legitimate logon scripts or custom shells may trigger false positives. apply additional filters accordingly.	t1037 t1037.001 windows sigma
the vast majority of vm writes are benign: provisioning, resizing, tagging, extension/identity changes, autoscale, and configuration management by users, service principals, and managed identities. this rule is informational only and is intended for correlation and baselining, not standalone alerting.	t1037 T1651 rules_building_block elastic