detection.wiki

Detection rules › Sigma

Potentially Suspicious Ping/Copy Command Combination

Status
test
Severity
medium
Log source
product windows, category process_creation
Author
X__Junior (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects uncommon and potentially suspicious one-liner command containing both "ping" and "copy" at the same time, which is usually used by malware.

MITRE ATT&CK coverage

TacticTechniques
StealthT1070.004 Indicator Removal: File Deletion

Event coverage

ProviderEventTitle
SysmonEvent ID 1Process creation

Rule body yaml

title: Potentially Suspicious Ping/Copy Command Combination
id: ded2b07a-d12f-4284-9b76-653e37b6c8b0
status: test
description: |
    Detects uncommon and potentially suspicious one-liner command containing both "ping" and "copy" at the same time, which is usually used by malware.
references:
    - Internal Research
author: X__Junior (Nextron Systems)
date: 2023-07-18
modified: 2024-03-06
tags:
    - attack.stealth
    - attack.t1070.004
logsource:
    category: process_creation
    product: windows
detection:
    # Note: In the case of sysmon and similar logging utilities, see this discussion https://github.com/SigmaHQ/sigma/discussions/4277
    selection_cmd:
        - Image|endswith: '\cmd.exe'
        - OriginalFileName: 'Cmd.Exe'
    selection_action:
        CommandLine|contains|all:
            - 'ping' # Covers "ping" and "ping.exe"
            - 'copy '
    selection_cli_1:
        CommandLine|contains|windash: ' -n ' # Count
    selection_cli_2:
        CommandLine|contains|windash: ' -y '
    condition: all of selection_*
falsepositives:
    - Unknown
level: medium

Stages and Predicates

Stage 0: condition

all of selection_*

Stage 1: selection_cmd

selection_cmd:
    - Image|endswith: '\cmd.exe'
    - OriginalFileName: 'Cmd.Exe'

Stage 2: selection_action

selection_action:
    CommandLine|contains|all:
        - 'ping'
        - 'copy '

Stage 3: selection_cli_1

selection_cli_1:
    CommandLine|contains|windash: ' -n '

Stage 4: selection_cli_2

selection_cli_2:
    CommandLine|contains|windash: ' -y '

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
CommandLinematch
  • -n transforms: windash corpus 3 (sigma 3)
  • -y transforms: windash
  • copy corpus 12 (sigma 11, chronicle 1)
  • ping corpus 6 (sigma 4, splunk 1, kusto 1)
Imageends_with
  • \cmd.exe corpus 130 (sigma 130)
OriginalFileNameeq
  • Cmd.Exe corpus 65 (sigma 43, splunk 17, elastic 5)