Detectionhightest

WhoAmI as Parameter

Detects a suspicious process command line that uses whoami as first parameter (as e.g. used by EfsPotato)

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Florian Roth (Nextron Systems)Created Mon Nov 29Updated Sun Dec 25e9142d84-fbe0-401d-ac50-3e519fb00c89windows

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection:
        CommandLine|contains: '.exe whoami'
    condition: selection

False Positives

Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

References

MITRE ATT&CK

Tactics

Techniques

CAR Analytics

2016-03-001 · CAR 2016-03-001

Rule Metadata

Rule ID

e9142d84-fbe0-401d-ac50-3e519fb00c89

Status

test

Level

high

Type

Detection

Created

Mon Nov 29

Modified

Sun Dec 25

Author

Path

rules/windows/process_creation/proc_creation_win_susp_whoami_as_param.yml

Raw Tags

attack.discoveryattack.t1033car.2016-03-001