title: Command Line Execution with Suspicious URL and AppData Strings
author: Florian Roth, Jonhnathan Ribeiro, oscd.community
date: 2019/01/16
description: Detects a suspicious command line execution that includes an URL and
    AppData string in the command line parameters as used by several droppers (js/vbs
    > powershell)
detection:
    SELECTION_1:
        EventID: 1
    SELECTION_2:
        Image: '*\cmd.exe'
    SELECTION_3:
        CommandLine: '*http*'
    SELECTION_4:
        CommandLine: '*://*'
    SELECTION_5:
        CommandLine: '*%AppData%*'
    condition: (SELECTION_1 and SELECTION_2 and SELECTION_3 and SELECTION_4 and SELECTION_5)
falsepositives:
- High
fields:
- CommandLine
- ParentCommandLine
id: 1ac8666b-046f-4201-8aba-1951aaec03a3
level: medium
logsource:
    category: process_creation
    product: windows
modified: 2020/11/20
references:
- https://www.hybrid-analysis.com/sample/3a1f01206684410dbe8f1900bbeaaa543adfcd07368ba646b499fa5274b9edf6?environmentId=100
- https://www.hybrid-analysis.com/sample/f16c729aad5c74f19784a24257236a8bbe27f7cdc4a89806031ec7f1bebbd475?environmentId=100
status: experimental
tags:
- attack.execution
- attack.t1059.003
- attack.t1059.001
- attack.command_and_control
- attack.t1105
yml_filename: win_susp_cmd_http_appdata.yml
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation