CmdID / Rules / Windows

Grixba Malware Reconnaissance Activity

A Sigma rule for process creation on Windows, from SigmaHQ’s emerging threats rules, by yxinmiracle, Swachchhanda Shrawan Poudel (Nextron Systems).

high 2 ATT&CK techniques

What it looks for

its detection, as SigmaHQ writes it

detection:
  selection_input_flag:
    CommandLine|contains:
      - '-i '
      - '-input '
      - '-i:'
      - '-input:'
  selection_input_options:
    CommandLine|contains:
      - ':f '
      - ':r '
      - ':s '
      - ' f '
      - ' r '
      - ' s '
  selection_mode_flag:
    CommandLine|contains:
      - '-m '
      - '-mode '
      - '-m:'
      - '-mode:'
  selection_scan_value:
    CommandLine|contains:
      - 'scan '
      - 'scanall '
  condition: all of selection_*

The rule’s detection, its selections and fields in order of name. The whole rule, with its references and false positives, is on SigmaHQ, by yxinmiracle, Swachchhanda Shrawan Poudel (Nextron Systems), under the Detection Rule License 1.1. CmdID evaluates it on a command line alone: a test on what a command line cannot show, such as the parent process or the user, is not met.

None of the everyday examples and documented commands on CmdID’s program pages trips it. To see whether a command line does, paste it into CmdID.

ATT&CK

the techniques it is tagged with

T1046Network Service Discovery

T1595.001Active Scanning: Scanning IP Blocks

Grixba Malware Reconnaissance Activity

What it looks for

ATT&CK

Other rules for T1046 Network Service Discovery