1type: trigger
2name: sigmahq/proc_creation_win_cmd_ping_del_combined_execution
3description: |
4  Detects a method often used by ransomware. Which combines the "ping" to wait a couple of seconds and then "del" to delete the file in question. Its used to hide the file responsible for the initial infection for example
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.CommandLine contains ' -n ' || evt.Parsed.CommandLine contains ' /n ' || evt.Parsed.CommandLine contains ' –n ' || evt.Parsed.CommandLine contains ' —n ' || evt.Parsed.CommandLine contains ' ―n ') && evt.Parsed.CommandLine contains 'Nul' && (evt.Parsed.CommandLine contains ' -f ' || evt.Parsed.CommandLine contains ' /f ' || evt.Parsed.CommandLine contains ' –f ' || evt.Parsed.CommandLine contains ' —f ' || evt.Parsed.CommandLine contains ' ―f ' || evt.Parsed.CommandLine contains ' -q ' || evt.Parsed.CommandLine contains ' /q ' || evt.Parsed.CommandLine contains ' –q ' || evt.Parsed.CommandLine contains ' —q ' || evt.Parsed.CommandLine contains ' ―q ') && evt.Parsed.CommandLine contains 'ping' && evt.Parsed.CommandLine contains 'del ')
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1070.004
15
16  label: "Suspicious Ping/Del Command Combination"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24