Suspicious Msbuild Execution By Uncommon Parent Process

Severity: medium
Author: frack113
Source: upstream

Detects suspicious execution of 'Msbuild.exe' by a uncommon parent process

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation

Stages and Predicates

Stage 1: `selection`

or:
Image|endswith: '\MSBuild.exe'
OriginalFileName: MSBuild.exe

Stage 2: `not filter_parent`

or:
ParentImage|endswith: '\cmd.exe'
ParentImage|endswith: '\devenv.exe'
ParentImage|endswith: '\explorer.exe'
ParentImage|endswith: '\msbuild.exe'
ParentImage|endswith: '\nuget.exe'
ParentImage|endswith: '\python.exe'

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
`Image`	ends_with	`\MSBuild.exe`
`OriginalFileName`	eq	`MSBuild.exe`
`ParentImage`	ends_with	`\cmd.exe` corpus 13 (sigma 13) `\devenv.exe` `\explorer.exe` corpus 11 (sigma 11) `\msbuild.exe` `\nuget.exe` `\python.exe` corpus 2 (sigma 2)