New Service Creation Using Sc.EXE

Severity: low
Author: Timur Zinniatullin, Daniil Yugoslavskiy, oscd.community
Source: upstream

Detects the creation of a new service using the "sc.exe" utility.

MITRE ATT&CK coverage

Tactic	Techniques
Persistence	`T1543.003` Create or Modify System Process: Windows Service
Privilege Escalation	`T1543.003` Create or Modify System Process: Windows Service

Event coverage

Provider	Event ID	Title
Sysmon	1	Process creation
Security-Auditing	4688	A new process has been created.

Stages and Predicates

Stage 1: `selection`

CommandLine|contains: binPath
CommandLine|contains: create
Image|endswith: '\sc.exe'

Stage 2: `not 1 of filter_optional_dropbox`

or:
ParentImage|startswith: 'C:\Program Files (x86)\Dropbox\Client\'
ParentImage|startswith: 'C:\Program Files\Dropbox\Client\'
ParentImage|endswith: '\Dropbox.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
`CommandLine`	match	`binPath` corpus 4 (sigma 4) `create` corpus 8 (sigma 8)
`Image`	ends_with	`\sc.exe` corpus 17 (sigma 17)
`ParentImage`	ends_with	`\Dropbox.exe` corpus 2 (sigma 2)
`ParentImage`	starts_with	`C:\Program Files (x86)\Dropbox\Client\` `C:\Program Files\Dropbox\Client\`