PUA - System Informer Driver Load

Status: test
Severity: medium
Log source: product windows, category driver_load
Author: Florian Roth (Nextron Systems)
Source: github.com/SigmaHQ/sigma

Detects driver load of the System Informer tool

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1543` Create or Modify System Process
Privilege Escalation	`T1543` Create or Modify System Process

Event coverage

Provider	Event	Title
Sysmon	Event ID 6	Driver loaded

Rule body yaml

title: PUA - System Informer Driver Load
id: 10cb6535-b31d-4512-9962-513dcbc42cc1
related:
    - id: 67add051-9ee7-4ad3-93ba-42935615ae8d
      type: similar
status: test
description: Detects driver load of the System Informer tool
references:
    - https://systeminformer.sourceforge.io/
    - https://github.com/winsiderss/systeminformer
author: Florian Roth (Nextron Systems)
date: 2023-05-08
modified: 2024-11-23
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.t1543
logsource:
    category: driver_load
    product: windows
detection:
    selection:
        - ImageLoaded|endswith: '\SystemInformer.sys'
        - Hashes|contains:
              - 'SHA256=8B9AD98944AC9886EA4CB07700E71B78BE4A2740934BB7E46CA3B56A7C59AD24'
              - 'SHA256=A41348BEC147CA4D9EA2869817527EB5CEA2E20202AF599D2B30625433BCF454'
              - 'SHA256=38EE0A88AF8535A11EFE8D8DA9C6812AA07067B75A64D99705A742589BDD846D'
              - 'SHA256=A773891ACF203A7EB0C0D30942FB1347648F1CD918AE2BFD9A4857B4DCF5081B'
              - 'SHA256=4C3B81AC88A987BBDF7D41FA0AECC2CEDF5B9BD2F45E7A21F376D05345FC211D'
              - 'SHA256=3241BC14BEC51CE6A691B9A3562E5C1D52E9D057D27A3D67FD0B245C350B6D34'
              - 'SHA256=047C42E9BBA28366868847C7DAFC1E043FB038C796422D37220493517D68EE89'
              - 'SHA256=18931DC81E95D0020466FA091E16869DBE824E543A4C2C8FE644FA71A0F44FEB'
              - 'SHA256=B4C2EF76C204273132FDE38F0DED641C2C5EE767652E64E4C4071A4A973B6C1B'
              - 'SHA256=640954AFC268565F7DAA6E6F81A8EE05311E33E34332B501A3C3FE5B22ADEA97'
              - 'SHA256=251BE949F662C838718F8AA0A5F8211FB90346D02BD63FF91E6B224E0E01B656'
              - 'SHA256=E2606F272F7BA054DF16BE464FDA57211EF0D14A0D959F9C8DCB0575DF1186E4'
              - 'SHA256=3A9E1D17BEEB514F1B9B3BACAEE7420285DE5CBDCE89C5319A992C6CBD1DE138'
    condition: selection
falsepositives:
    - System Informer is regularly used legitimately by system administrators or developers. Apply additional filters accordingly
level: medium

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    - ImageLoaded|endswith: '\SystemInformer.sys'
    - Hashes|contains:
          - 'SHA256=8B9AD98944AC9886EA4CB07700E71B78BE4A2740934BB7E46CA3B56A7C59AD24'
          - 'SHA256=A41348BEC147CA4D9EA2869817527EB5CEA2E20202AF599D2B30625433BCF454'
          - 'SHA256=38EE0A88AF8535A11EFE8D8DA9C6812AA07067B75A64D99705A742589BDD846D'
          - 'SHA256=A773891ACF203A7EB0C0D30942FB1347648F1CD918AE2BFD9A4857B4DCF5081B'
          - 'SHA256=4C3B81AC88A987BBDF7D41FA0AECC2CEDF5B9BD2F45E7A21F376D05345FC211D'
          - 'SHA256=3241BC14BEC51CE6A691B9A3562E5C1D52E9D057D27A3D67FD0B245C350B6D34'
          - 'SHA256=047C42E9BBA28366868847C7DAFC1E043FB038C796422D37220493517D68EE89'
          - 'SHA256=18931DC81E95D0020466FA091E16869DBE824E543A4C2C8FE644FA71A0F44FEB'
          - 'SHA256=B4C2EF76C204273132FDE38F0DED641C2C5EE767652E64E4C4071A4A973B6C1B'
          - 'SHA256=640954AFC268565F7DAA6E6F81A8EE05311E33E34332B501A3C3FE5B22ADEA97'
          - 'SHA256=251BE949F662C838718F8AA0A5F8211FB90346D02BD63FF91E6B224E0E01B656'
          - 'SHA256=E2606F272F7BA054DF16BE464FDA57211EF0D14A0D959F9C8DCB0575DF1186E4'
          - 'SHA256=3A9E1D17BEEB514F1B9B3BACAEE7420285DE5CBDCE89C5319A992C6CBD1DE138'

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
`Hashes`	match	`SHA256=047C42E9BBA28366868847C7DAFC1E043FB038C796422D37220493517D68EE89` `SHA256=18931DC81E95D0020466FA091E16869DBE824E543A4C2C8FE644FA71A0F44FEB` `SHA256=251BE949F662C838718F8AA0A5F8211FB90346D02BD63FF91E6B224E0E01B656` `SHA256=3241BC14BEC51CE6A691B9A3562E5C1D52E9D057D27A3D67FD0B245C350B6D34` `SHA256=38EE0A88AF8535A11EFE8D8DA9C6812AA07067B75A64D99705A742589BDD846D` `SHA256=3A9E1D17BEEB514F1B9B3BACAEE7420285DE5CBDCE89C5319A992C6CBD1DE138` `SHA256=4C3B81AC88A987BBDF7D41FA0AECC2CEDF5B9BD2F45E7A21F376D05345FC211D` `SHA256=640954AFC268565F7DAA6E6F81A8EE05311E33E34332B501A3C3FE5B22ADEA97` `SHA256=8B9AD98944AC9886EA4CB07700E71B78BE4A2740934BB7E46CA3B56A7C59AD24` `SHA256=A41348BEC147CA4D9EA2869817527EB5CEA2E20202AF599D2B30625433BCF454` `SHA256=A773891ACF203A7EB0C0D30942FB1347648F1CD918AE2BFD9A4857B4DCF5081B` `SHA256=B4C2EF76C204273132FDE38F0DED641C2C5EE767652E64E4C4071A4A973B6C1B` `SHA256=E2606F272F7BA054DF16BE464FDA57211EF0D14A0D959F9C8DCB0575DF1186E4`
`ImageLoaded`	ends_with	`\SystemInformer.sys`

`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)

PUA - System Informer Driver Load

MITRE ATT&CK coverage

Event coverage

Rule body yaml

Stages and Predicates

Stage 0: `condition`

Stage 1: `selection`

Indicators

Keyboard shortcuts

Search operators

PUA - System Informer Driver Load

MITRE ATT&CK coverage

Event coverage

Rule body yaml

Stages and Predicates

Stage 0: condition

Stage 1: selection

Indicators

Stage 0: `condition`

Stage 1: `selection`