t1539 | LoFP

t1539

Title	Tags
a user running azure cli, azure powershell, vs code, graph cli, or visual studio on a jump host, cloud shell, or vpn egress that differs from the workstation's windows sign-in ip can match if that activity still presents a compliant or managed workstation deviceid. validate whether the graph client ran on the enrolled device before treating the event as cookie theft.	t1078 t1528 t1539 t1550 azure elastic
a user who runs azure cli, azure powershell, vs code, graph cli, or visual studio from a new egress (vpn, hotel, cloud shell, jump host) while wam still attaches a compliant or managed workstation deviceid will match on first sight of that ip. exception: add known developer and cloud shell ranges after confirming the client ran there.	t1078 t1528 t1539 t1550 azure elastic
applications will tag the operating system as null when the device is not recognized as a managed device. in environments where users frequently switch between managed and unmanaged devices, this may lead to false positives.	t1539 okta elastic
automated integrations or scripts using service accounts with session cookies may trigger user-agent based detection. consider excluding known automation accounts by okta.actor.alternate_id.	t1539 t1550 okta elastic
developers performing browsers plugin or extension debugging.	t1539 cross-platform elastic
legitimate automation, sdks, or custom applications that obtain tokens through the microsoft authentication broker against graph, azure ad, or device registration service may use non-browser user agents. baseline approved service principals, managed identities, and developer tooling before tuning exclusions for known automation patterns.	t1078 t1539 t1566 azure elastic
legitimate node.js or undici-based automation, health checks, or internal services that use the microsoft authentication broker or the same first-party application ids against graph or exchange may match. developers using axios or undici with delegated flows can also resemble this pattern.	t1539 t1566 azure o365 elastic
legitimate users may appear in multiple countries within the window when using vpns or proxies with exit nodes in different countries, when traveling near borders, or when mobile networks geolocate to different countries. verify the source ips and asns in \"esql.source_ip_values\", confirm whether the locations are consistent with the user's expected activity, and exclude known vpn egress patterns after validation. shared iam users (an anti-pattern) used by multiple people will also match.	t1078 t1539 aws elastic
legitimate webproxy settings modification	t1539 t1557 macos elastic
microsoft teams, microsoft office, onedrive syncengine, microsoft authentication broker, outlook mobile, bing, azure portal, adibizaux, and office 365 management are omitted. the rest of the secureworks known-foci-clients.csv family (edge, onedrive, intune company portal, windows search, authenticator, sharepoint, planner, power bi, and similar) is omitted for the same reason: routine workstation or mobile graph whose microsoft 365 egress often differs from the windows sign-in ip without cookie theft. hunt those app_ids separately if harvest is already confirmed.	t1078 t1528 t1539 t1550 azure elastic
microsoft teams, office, onedrive syncengine, authentication broker, outlook mobile, bing, azure portal, and office 365 management are omitted because first sight of a mobile or m365 egress ip for those clients is routine.	t1078 t1528 t1539 t1550 azure elastic
mobile users switching between wifi and cellular may show ip address changes. correlate with device type and typical user behavior patterns.	t1539 t1550 okta elastic
split-tunnel or dual-homed devices can present a new microsoft 365 egress for tooling clients. confirm the ip belongs to the enrolled device before treating the event as cookie theft.	t1078 t1528 t1539 t1550 azure elastic
split-tunnel or dual-homed devices may present different egress ips for wam versus azure cli. confirm both ips belong to the same physical device before raising severity.	t1078 t1528 t1539 t1550 azure elastic
unknown	t1003 t1003.001 t1003.002 t1003.003 t1003.004 t1003.006 t1005 t1008 t1010 t1012 t1018 t1020 t1021 t1021.001 t1021.002 t1021.003 t1021.005 t1021.006 t1027 t1027.001 t1027.003 t1027.004 t1027.005 t1027.009 t1027.010 t1033 t1036 t1036.003 t1036.005 t1036.007 t1040 t1046 t1047 t1048 t1048.003 t1049 t1053 t1053.002 t1053.005 t1055 t1055.001 t1055.003 t1055.009 t1055.011 t1055.012 t1056 t1056.001 t1057 t1059 t1059.001 t1059.002 t1059.003 t1059.004 t1059.005 t1059.006 t1059.007 t1068 t1069 t1069.001 t1069.002 t1069.003 t1070 t1070.003 t1070.004 t1070.005 t1070.006 t1071 t1071.001 t1071.004 t1072 t1074 t1074.001 t1078 t1078.001 t1078.002 t1078.003 t1078.004 t1082 t1083 t1087 t1087.001 t1087.002 t1087.004 t1090 t1090.001 t1090.003 t1095 t1098 t1102 t1102.001 t1102.003 t1105 t1106 t1110 t1110.001 t1112 t1113 t1114 t1114.001 t1115 t1119 t1123 t1127 t1127.001 t1133 t1134 t1134.001 t1134.002 t1134.003 t1135 t1136 t1136.001 t1136.002 t1137 t1137.002 t1137.006 t1140 t1176 t1176.001 t1185 t1187 t1190 t1195 t1195.001 t1197 t1199 t1200 t1201 t1202 t1203 t1204 t1204.001 t1204.002 t1204.004 t1207 t1210 t1211 t1212 t1216 t1216.001 t1217 t1218 t1218.001 t1218.002 t1218.003 t1218.005 t1218.007 t1218.009 t1218.010 t1218.011 t1218.013 t1219 t1219.002 t1220 t1222 t1222.001 t1482 t1484 t1485 t1486 t1489 t1490 t1491 t1491.001 t1497 t1497.001 t1498 t1499 t1499.004 t1505 t1505.003 t1505.004 t1518 t1518.001 t1526 t1528 t1529 t1531 t1537 t1539 t1543 t1543.001 t1543.003 t1543.004 t1546 t1546.001 t1546.002 t1546.003 t1546.007 t1546.008 t1546.009 t1546.010 t1546.011 t1546.012 t1546.015 t1547 t1547.001 t1547.003 t1547.004 t1547.005 t1547.006 t1547.008 t1547.009 t1547.010 t1548 t1548.002 t1552 t1552.001 t1552.002 t1552.004 t1552.006 t1553 t1553.004 t1554 t1555 t1555.003 t1555.004 t1555.005 t1556 t1556.002 t1557 t1557.001 t1557.003 t1558 t1558.003 t1559 t1559.001 t1559.002 t1560 t1560.001 t1563 t1563.002 t1564 t1564.001 t1564.002 t1564.003 t1564.004 t1565 t1566 t1566.001 t1566.002 t1567 t1567.002 t1569 t1569.002 t1571 t1572 t1573 t1574 t1574.001 t1574.005 t1574.006 t1574.008 t1574.011 t1584 t1587 t1587.001 t1588 t1588.001 t1588.002 t1593 t1593.003 t1595 t1608 t1609 t1611 t1614 t1614.001 t1615 t1620 t1621 t1649 t1685 t1685.001 t1685.005 t1686 t1686.003 linux windows cisco zeek m365 azure aws gcp onelogin okta macos kubernetes rpc_firewall sigma
users legitimately switching networks (e.g., vpn connect/disconnect, office to home) may trigger ip-based detection. review the geographic distance and time between ip changes to assess legitimacy.	t1539 t1550 okta elastic