Detection rules › Sigma

Potential Signing Bypass Via Windows Developer Features

Severity
high
Author
Nasreddine Bencherchali (Nextron Systems)
Source
upstream

Detects when a user enable developer features such as "Developer Mode" or "Application Sideloading". Which allows the user to install untrusted packages.

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: all of selection_img

or:
Image|endswith: '\SystemSettingsAdminFlows.exe'
OriginalFileName: SystemSettingsAdminFlows.EXE

Stage 2: all of selection_flag

CommandLine|contains: TurnOnDeveloperFeatures

Stage 3: all of selection_options

or:
CommandLine|contains: DeveloperUnlock
CommandLine|contains: EnableSideloading

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.

FieldKindValues
CommandLinematch
  • DeveloperUnlock
  • EnableSideloading
  • TurnOnDeveloperFeatures
Imageends_with
  • \SystemSettingsAdminFlows.exe
OriginalFileNameeq
  • SystemSettingsAdminFlows.EXE