Hunt for RDP sessions to unmanaged and non TPM devices

Group by: DeviceId, IPAddress, RemoteIP
Author: Robbe Van den Daele
Source: github.com/HybridBrothers/Hunting-Queries-Detection-Rules

This query can help you find devices performing RDP sessions to unmanaged or non-TPM protected devices.

MITRE ATT&CK coverage

Tactic	Techniques
Lateral Movement	`T1021.001` Remote Services: Remote Desktop Protocol

References

https://hybridbrothers.com/detecting-non-privileged-windows-hello-abuse/

Event coverage

Provider	Event/ActionType	Title
Sysmon	Event ID 3	Network connection
Security-Auditing	Event ID 5156	The Windows Filtering Platform has permitted a connection.
Defender-DeviceNetworkEvents	ConnectionSuccess	Connection succeeded

Rule body yaml

let no_tpm_devices = (
    ExposureGraphNodes
    // Get device nodes with their inventory ID
    | where NodeLabel == "device"
    | mv-expand EntityIds
    | where EntityIds.type == "DeviceInventoryId"
    // Get interesting properties
    | extend OnboardingStatus = tostring(parse_json(NodeProperties)["rawData"]["onboardingStatus"]),
        TpmSupported = tostring(parse_json(NodeProperties)["rawData"]["tpmData"]["supported"]),
        TpmEnabled = tostring(parse_json(NodeProperties)["rawData"]["tpmData"]["enabled"]),
        TpmActivated = tostring(parse_json(NodeProperties)["rawData"]["tpmData"]["activated"]),
        DeviceName = tostring(parse_json(NodeProperties)["rawData"]["deviceName"]),
        DeviceId = tostring(EntityIds.id)
    // Search for distinct devices
    | distinct DeviceId, DeviceName, OnboardingStatus, TpmSupported, TpmEnabled, TpmActivated
    // Get Unmanaged devices and device not supporting a TPM
    | where OnboardingStatus != "Onboarded" or (TpmSupported != "true" and TpmActivated != "true" and TpmEnabled != "true")
    | extend TpmSupported = iff(TpmSupported == "", "unknown", TpmSupported),
        TpmActivated = iff(TpmActivated == "", "unknown", TpmActivated),
        TpmEnabled = iff(TpmEnabled == "", "unknown", TpmEnabled)
);
let no_tpm_device_info = (
    DeviceNetworkInfo
    | where Timestamp > ago(7d)
    // Get latest network info for each device ID
    | summarize arg_max(Timestamp, *) by DeviceId
    | mv-expand todynamic(IPAddresses)
    | extend IPAddress = tostring(IPAddresses.IPAddress)
    // Find no TPM devices and join with their network information
    | join kind=inner no_tpm_devices on DeviceId
    | project DeviceId, DeviceName, MacAddress, IPAddress, OnboardingStatus, TpmActivated, TpmEnabled, TpmSupported
);
DeviceNetworkEvents
// Search for RDP connections to non-tpm devices
| where Timestamp > ago(1h)
| where ActionType == "ConnectionSuccess"
| where RemotePort == 3389
// Exclude MDI RDP Connections (known for NNR)
| where InitiatingProcessFileName !~ "microsoft.tri.sensor.exe"
| join kind=inner no_tpm_device_info on $left.RemoteIP == $right.IPAddress
| project-rename RemoteDeviceId = DeviceId1, RemoteDeviceName = DeviceName1, RemoteMacAddress = MacAddress, RemoteDeviceOnboardingStatus = OnboardingStatus, RemoteDeviceTpmActivated = TpmActivated, RemoteDeviceTpmEnabled = TpmEnabled, RemoteDeviceTpmSupported = TpmSupported
| project-away IPAddress

let no_tpm_devices = (
    ExposureGraphNodes
    // Get device nodes with their inventory ID
    | where NodeLabel == "device"
    | mv-expand EntityIds
    | where EntityIds.type == "DeviceInventoryId"
    // Get interesting properties
    | extend OnboardingStatus = tostring(parse_json(NodeProperties)["rawData"]["onboardingStatus"]),
        TpmSupported = tostring(parse_json(NodeProperties)["rawData"]["tpmData"]["supported"]),
        TpmEnabled = tostring(parse_json(NodeProperties)["rawData"]["tpmData"]["enabled"]),
        TpmActivated = tostring(parse_json(NodeProperties)["rawData"]["tpmData"]["activated"]),
        DeviceName = tostring(parse_json(NodeProperties)["rawData"]["deviceName"]),
        DeviceId = tostring(EntityIds.id)
    // Search for distinct devices
    | distinct DeviceId, DeviceName, OnboardingStatus, TpmSupported, TpmEnabled, TpmActivated
    // Get Unmanaged devices and device not supporting a TPM
    | where OnboardingStatus != "Onboarded" or (TpmSupported != "true" and TpmActivated != "true" and TpmEnabled != "true")
    | extend TpmSupported = iff(TpmSupported == "", "unknown", TpmSupported),
        TpmActivated = iff(TpmActivated == "", "unknown", TpmActivated),
        TpmEnabled = iff(TpmEnabled == "", "unknown", TpmEnabled)
);
let no_tpm_device_info = (
    DeviceNetworkInfo
    | where TimeGenerated > ago(7d)
    // Get latest network info for each device ID
    | summarize arg_max(TimeGenerated, *) by DeviceId
    | mv-expand todynamic(IPAddresses)
    | extend IPAddress = tostring(IPAddresses.IPAddress)
    // Find no TPM devices and join with their network information
    | join kind=inner no_tpm_devices on DeviceId
    | project DeviceId, DeviceName, MacAddress, IPAddress, OnboardingStatus, TpmActivated, TpmEnabled, TpmSupported
);
DeviceNetworkEvents
// Search for RDP connections to non-tpm devices
| where TimeGenerated > ago(1h)
| where ActionType == "ConnectionSuccess"
| where RemotePort == 3389
// Exclude MDI RDP Connections (known for NNR)
| where InitiatingProcessFileName !~ "microsoft.tri.sensor.exe"
| join kind=inner no_tpm_device_info on $left.RemoteIP == $right.IPAddress
| project-rename RemoteDeviceId = DeviceId1, RemoteDeviceName = DeviceName1, RemoteMacAddress = MacAddress, RemoteDeviceOnboardingStatus = OnboardingStatus, RemoteDeviceTpmActivated = TpmActivated, RemoteDeviceTpmEnabled = TpmEnabled, RemoteDeviceTpmSupported = TpmSupported
| project-away IPAddress

Stages and Predicates

Let binding: `no_tpm_devices`

let no_tpm_devices = (
    ExposureGraphNodes
    | where NodeLabel == "device"
    | mv-expand EntityIds
    | where EntityIds.type == "DeviceInventoryId"
    | extend OnboardingStatus = tostring(parse_json(NodeProperties)["rawData"]["onboardingStatus"]),
        TpmSupported = tostring(parse_json(NodeProperties)["rawData"]["tpmData"]["supported"]),
        TpmEnabled = tostring(parse_json(NodeProperties)["rawData"]["tpmData"]["enabled"]),
        TpmActivated = tostring(parse_json(NodeProperties)["rawData"]["tpmData"]["activated"]),
        DeviceName = tostring(parse_json(NodeProperties)["rawData"]["deviceName"]),
        DeviceId = tostring(EntityIds.id)
    | distinct DeviceId, DeviceName, OnboardingStatus, TpmSupported, TpmEnabled, TpmActivated
    | where OnboardingStatus != "Onboarded" or (TpmSupported != "true" and TpmActivated != "true" and TpmEnabled != "true")
    | extend TpmSupported = iff(TpmSupported == "", "unknown", TpmSupported),
        TpmActivated = iff(TpmActivated == "", "unknown", TpmActivated),
        TpmEnabled = iff(TpmEnabled == "", "unknown", TpmEnabled)
);

Let binding: `no_tpm_device_info`

let no_tpm_device_info = (
    DeviceNetworkInfo
    | where Timestamp > ago(7d)
    | summarize arg_max(Timestamp, *) by DeviceId
    | mv-expand todynamic(IPAddresses)
    | extend IPAddress = tostring(IPAddresses.IPAddress)
    | join kind=inner no_tpm_devices on DeviceId
    | project DeviceId, DeviceName, MacAddress, IPAddress, OnboardingStatus, TpmActivated, TpmEnabled, TpmSupported
);

Derived from no_tpm_devices.

Stage 1: `source`

DeviceNetworkEvents

Stage 2: `where`

| where Timestamp > ago(1h)

Stage 3: `where`

| where ActionType == "ConnectionSuccess"

Stage 4: `where`

| where RemotePort == 3389

Stage 5: `where`

| where InitiatingProcessFileName !~ "microsoft.tri.sensor.exe"

Stage 6: `join`

| join kind=inner no_tpm_device_info on $left.RemoteIP == $right.IPAddress

Stage 7: `project-rename`

| project-rename RemoteDeviceId = DeviceId1, RemoteDeviceName = DeviceName1, RemoteMacAddress = MacAddress, RemoteDeviceOnboardingStatus = OnboardingStatus, RemoteDeviceTpmActivated = TpmActivated, RemoteDeviceTpmEnabled = TpmEnabled, RemoteDeviceTpmSupported = TpmSupported

Stage 8: `project-away`

| project-away IPAddress

Stage 9: `summarize`

summarize by DeviceId

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

Field	Kind	Values
`ActionType`	eq	`ConnectionSuccess` transforms: `cased` corpus 9 (kusto 9)
`InitiatingProcessFileName`	ne	`microsoft.tri.sensor.exe` corpus 3 (kusto 3)
`NodeLabel`	eq	`device` transforms: `cased` corpus 3 (kusto 3)
`OnboardingStatus`	ne	`Onboarded` transforms: `cased` corpus 5 (kusto 5)
`RemotePort`	eq	`3389` transforms: `cased` corpus 11 (kusto 4, elastic 3, sigma 2, splunk 2)
`TpmActivated`	ne	`true` transforms: `cased` corpus 4 (kusto 4)
`TpmEnabled`	ne	`true` transforms: `cased` corpus 4 (kusto 4)
`TpmSupported`	ne	`true` transforms: `cased` corpus 4 (kusto 4)
`type`	eq	`DeviceInventoryId` transforms: `cased` corpus 5 (kusto 5)

Output fields

Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.

Field	Source
`DeviceId`	`summarize`

`j` / `k`	Scroll down / up
`d` / `u`	Half-page down / up
`gg` / `G`	Top / bottom
`h` / `l`	History back / forward
`f`	Follow link (`Shift` = new tab)
`/`	Focus search
`?`	Toggle this help
`↑` / `↓`	Navigate search results
`Enter`	Open highlighted result
`Esc`	Close results / dialog

`type:`	`events` / `rules` / `providers`
`vendor:`	`sigma` / `elastic` / `splunk` / `kusto` / `chronicle` (vendor name alone also works: `sigma:`, `kql:`, `secops:`…)
`tactic:`	TA-id, slug, or name: `credential_access`, `TA0006`
`technique:`	technique or sub-technique ID: `T1003`, `T1003.001` (alias `tech:`)
`severity:`	`critical` / `high` / `medium` / `low` / `informational` (alias `sev:`)
`risk_score`	Numeric comparison on the Elastic risk score (0 to 100): `risk_score>50`, `risk_score<=20`, `risk_score=99` (alias `risk`; Elastic rules only)
`stages:`	Rules with exactly N pipeline stages
`correlation:`	`single_event` / `sequence` / `alternatives` / `alternatives_cross_log` / `all_required` / `correlated`
`with:`	Co-occurrence event-id; stacks (`with:4624 with:4769`) to require all, while a comma list in one occurrence (`with:4624,4769`) is an either-or group. Implies multi-event
`like:`	Structural neighbors of a rule slug (equivalents + subsumption stricter / broader): `like:comsvcs_lsass_memory_dump-splunk-sysmon`
`groupby:`	Entity-grouping substring match against `group_by_keys`: `groupby:user`, `groupby:host`
`uses:`	Rules whose predicate tree touches the field (any kind, any value): `uses:CommandLine`
`excludes:`	Rules with top-level `not()` clauses on the field (FP whitelists): `excludes:ParentImage`
`field:` / `value:`	Predicate search; narrows rule cards to those with a matching leaf and drives the indicator tier. Unquoted = substring, wildcards allowed (`value:mimikatz`)
`indicator:`	Shorthand for `field:F value:V`: `indicator:Image=*\powershell.exe`
`kind:`	Filter by predicate kind. Narrows rule cards to those carrying a matching predicate leaf (`vendor:elastic kind:cidr_match`) and drives the indicator tier: `contains` / `starts_with` / `ends_with` / `regex` / `cidr` / `eq` / `in` … (operator aliases `op:`/`match:`)
`has:` / `no:`	`sample`, `field`, `notes`, `refs`, `trace`, `thirdparty`, `rule`, `pattern`, `timewindow`, `threshold`, `newterms`, `sigma`/`elastic`/`splunk`/`kusto`/`chronicle`
`-op:val`	Exclude matches; works on most operators but not `type:`/`like:`/`has:`/`no:` (use `no:<flag>` to exclude a rule flag): `tactic:execution -vendor:splunk`. Standalone `-kind:`/`-field:`/`-value:` drop every rule carrying a matching predicate leaf (`type:rules -kind:is_null`)
`field:"…"` / `value:"…"`	Quoted value = anchored exact match (also allows spaces): `value:"net user"`
`a,b`	Comma = OR inside one operator (`vendor:sigma,elastic`, `severity:high,critical`); repeating a facet merges the same way. `field:`/`value:` never split (literal commas)
`vendors:` / `stage:`	Singular and plural spellings fold to the canonical operator and value: `tactics:` = `tactic:`, `type:event` = `type:events`, `correlation:sequences` = `correlation:sequence`, `has:thresholds` = `has:threshold`
`"quoted phrase"`	Exact-match a multi-word phrase (free text)

Hunt for RDP sessions to unmanaged and non TPM devices

MITRE ATT&CK coverage

References

Event coverage

Rule body yaml

Stages and Predicates

Let binding: `no_tpm_devices`

Let binding: `no_tpm_device_info`

Stage 1: `source`

Stage 2: `where`

Stage 3: `where`

Stage 4: `where`

Stage 5: `where`

Stage 6: `join`

Stage 7: `project-rename`

Stage 8: `project-away`

Stage 9: `summarize`

Indicators

Output fields

Keyboard shortcuts

Search operators

Hunt for RDP sessions to unmanaged and non TPM devices

MITRE ATT&CK coverage

References

Event coverage

Rule body yaml

Stages and Predicates

Let binding: no_tpm_devices

Let binding: no_tpm_device_info

Stage 1: source

Stage 2: where

Stage 3: where

Stage 4: where

Stage 5: where

Stage 6: join

Stage 7: project-rename

Stage 8: project-away

Stage 9: summarize

Indicators

Output fields

Let binding: `no_tpm_devices`

Let binding: `no_tpm_device_info`

Stage 1: `source`

Stage 2: `where`

Stage 3: `where`

Stage 4: `where`

Stage 5: `where`

Stage 6: `join`

Stage 7: `project-rename`

Stage 8: `project-away`

Stage 9: `summarize`