1200KM / sigma-rule

Suspicious LSASS Access Via MalSecLogon — Sigma Rule

Sigma rule 472159c5-31b9-4f56-b794-b766faa8b0a7. Suspicious LSASS Access Via MalSecLogon — Sigma Rule. Detects suspicious access to LSASS handle via a call trace to "seclogon.dll" with a suspicious access right.

Rule metadata and linked tags

Author: Samir Bousseaden (original elastic rule), Nasreddine Bencherchali (Nextron Systems). Source status: test; severity: high. Source dates: 2022-06-29 / not supplied.

{
  "category": "process_access",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 48ab68741167fa31699b9eb167313f70de067b8b424ce5f145e5a222b0b3da25

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Suspicious LSASS Access Via MalSecLogon
id: 472159c5-31b9-4f56-b794-b766faa8b0a7
status: test
description: Detects suspicious access to LSASS handle via a call trace to "seclogon.dll" with a suspicious access right.
references:
    - https://twitter.com/SBousseaden/status/1541920424635912196
    - https://github.com/elastic/detection-rules/blob/2bc1795f3d7bcc3946452eb4f07ae799a756d94e/rules/windows/credential_access_lsass_handle_via_malseclogon.toml
    - https://splintercod3.blogspot.com/p/the-hidden-side-of-seclogon-part-3.html
author: Samir Bousseaden (original elastic rule), Nasreddine Bencherchali (Nextron Systems)
date: 2022-06-29
tags:
    - attack.credential-access
    - attack.t1003.001
logsource:
    category: process_access
    product: windows
detection:
    selection:
        TargetImage|endswith: '\lsass.exe'
        SourceImage|endswith: '\svchost.exe'
        GrantedAccess: '0x14c0'
        CallTrace|contains: 'seclogon.dll'
    condition: selection
falsepositives:
    - Unknown
level: high

Original YAML and metadata in JSON

False positives

Unknown

Source references

Connected ecosystem references

Exact source-tagged techniques

T1003.001 · LSASS Memory · Detection rules & anomalies

Telemetry review

Read the original logsource above, then inspect the linked detection workspaces for technique-level sensor context. No per-rule telemetry equivalence is inferred.

Pinned research references. No browser attack runner, live simulation result or validated detector is asserted. Source mappings and validation limits are preserved. ATT&CK / Atomic provenance · Detection provenance.