Greedy File Deletion Using Del

Title: Greedy File Deletion Using Del
Status: test
Description:Detects execution of the "del" builtin command to remove files using greedy/wildcard expression. This is often used by malware to delete content of folders that perhaps contains the initial malware infection or to delete evidence.
References:
  -https://www.joesandbox.com/analysis/509330/0/html#1044F3BDBE3BB6F734E357235F4D5898582D
  -https://learn.microsoft.com/en-us/windows-server/administration/windows-commands/erase
Author: frack113 , X__Junior (Nextron Systems)
Date: 2021-12-02
modified:2023-09-11
Tags:

• -'attack.stealth'
• -'attack.t1070.004'

Logsource:

• category: process_creation
• product: windows

Detection:
  selection_img:
Image|endswith:'\cmd.exe' OriginalFileName:'Cmd.Exe'   selection_del:
    CommandLine|contains:
      -'del '
      -'erase '

  selection_extensions:
    CommandLine|contains:
      -'\\\*.au3'
      -'\\\*.dll'
      -'\\\*.exe'
      -'\\\*.js'

  condition:all of selection_*
Falsepositives:
  -Unknown
Level: medium