Hub configuration

Name: Suspicious Calculator Usage
Author: sigmahq

More info

Suspicious Calculator Usage Detection Scenario by sigmahq | CrowdSec Hub

« Suspicious Calculator Usage »
v0.2 by sigmahq / proc_creation_win_calc_uncommon_exec
Attack scenariowindowsNot spoofableLow confidence

Detects suspicious use of 'calc.exe' with command line parameters or in a suspicious directory, which is likely caused by some PoC or detection evasion.

Installation

cscli scenarios install sigmahq/proc_creation_win_calc_uncommon_exec

YAML Configuration

1type: trigger
2name: sigmahq/proc_creation_win_calc_uncommon_exec
3description: |
4  Detects suspicious use of 'calc.exe' with command line parameters or in a suspicious directory, which is likely caused by some PoC or detection evasion. 
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && (evt.Parsed.CommandLine contains '\\calc.exe ' || evt.Parsed.Image endsWith '\\calc.exe' && not (evt.Parsed.Image contains ':\\Windows\\System32\\' || evt.Parsed.Image contains ':\\Windows\\SysWOW64\\' || evt.Parsed.Image contains ':\\Windows\\WinSxS\\'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1036
15
16  label: "Suspicious Calculator Usage"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24

Hub configuration

« Suspicious Calculator Usage »v0.2 by sigmahq / proc_creation_win_calc_uncommon_execAttack scenariowindowsNot spoofableLow confidenceMITRE:t1036

« Suspicious Calculator Usage »
v0.2 by sigmahq / proc_creation_win_calc_uncommon_exec
Attack scenariowindowsNot spoofableLow confidence