Detection rules › Kusto Query Language

Detecting Macro Invoking ShellBrowserWindow COM Objects

Source: upstream

'This query detects a macro invoking ShellBrowserWindow COM Objects evade naive parent/child Office detection rules.'

MITRE ATT&CK coverage

Tactic	Techniques
Lateral Movement	`T1021.003` Remote Services: Distributed Component Object Model

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `source`

Event

Stage 2: `where`

and
  EventID eq "1"
  EventLog eq "Microsoft-Windows-Sysmon/Operational"

Stage 3: `parse`

Stage 4: `where`

and
  CommandLine match "{c08afd90-f2a1-11d1-8455-00a0c91f3880}"
  Image match "rundll32.exe"
  ParentImage match "svchost.exe"

Stage 5: `parse`

Stage 6: `summarize`

Stage 7: `extend`

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
`CommandLine`	match	`{c08afd90-f2a1-11d1-8455-00a0c91f3880}`
`EventID`	eq	`1` corpus 3 (splunk 3)
`EventLog`	eq	`Microsoft-Windows-Sysmon/Operational`
`Image`	match	`rundll32.exe`
`ParentImage`	match	`svchost.exe`

Detecting Macro Invoking ShellBrowserWindow COM Objects

MITRE ATT&CK coverage

Event coverage

Stages and Predicates

Stage 1: source

Stage 2: where

Stage 3: parse

Stage 4: where

Stage 5: parse

Stage 6: summarize

Stage 7: extend