Suspicious TSCON Start as SYSTEM

Severity: high
Author: Florian Roth (Nextron Systems)
Source: upstream

Detects a tscon.exe start as LOCAL SYSTEM

MITRE ATT&CK coverage

Tactic	Techniques
Command & Control	`T1219.002` Remote Access Tools: Remote Desktop Software

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`

or:
User|contains: AUTHORI
User|contains: AUTORI
Image|endswith: '\tscon.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.