Detection rules › Sigma

Suspicious SysAidServer Child

Severity
medium
Author
Florian Roth (Nextron Systems)
Source
upstream

Detects suspicious child processes of SysAidServer (as seen in MERCURY threat actor intrusions)

MITRE ATT&CK coverage

TacticTechniques
Lateral MovementT1210 Exploitation of Remote Services

Event coverage

ProviderEvent IDTitle
Sysmon1Process creation

Stages and Predicates

Stage 1: selection

or:
ParentImage|endswith: '\java.exe'
ParentImage|endswith: '\javaw.exe'
ParentCommandLine|contains: SysAidServer

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
ParentCommandLinematch
  • SysAidServer
ParentImageends_with
  • \java.exe corpus 7 (sigma 7)
  • \javaw.exe corpus 5 (sigma 5)