Monitoring For Persistence Via BITS

Title: Monitoring For Persistence Via BITS
Status: test
Description:BITS will allow you to schedule a command to execute after a successful download to notify you that the job is finished. When the job runs on the system the command specified in the BITS job will be executed. This can be abused by actors to create a backdoor within the system and for persistence. It will be chained in a BITS job to schedule the download of malware/additional binaries and execute the program after being downloaded.
References:
  -https://www.fireeye.com/blog/threat-research/2020/10/kegtap-and-singlemalt-with-a-ransomware-chaser.html
  -http://0xthem.blogspot.com/2014/03/t-emporal-persistence-with-and-schtasks.html
  -https://isc.sans.edu/diary/Wipe+the+drive+Stealthy+Malware+Persistence+Mechanism+-+Part+1/15394
Author: Sreeman
Date: 2020-10-29
modified:2024-01-25
Tags:

• -'attack.persistence'
• -'attack.execution'
• -'attack.stealth'
• -'attack.t1197'

Logsource:

• product: windows
• category: process_creation

Detection:
  selection_img:
Image|endswith:'\bitsadmin.exe' OriginalFileName:'bitsadmin.exe'   selection_cli_notify_1:
    CommandLine|contains: '/SetNotifyCmdLine'
  selection_cli_notify_2:
    CommandLine|contains:
      -'%COMSPEC%'
      -'cmd.exe'
      -'regsvr32.exe'

  selection_cli_add_1:
    CommandLine|contains: '/Addfile'
  selection_cli_add_2:
    CommandLine|contains:
      -'http:'
      -'https:'
      -'ftp:'
      -'ftps:'

  condition:selection_img and (all of selection_cli_notify_* or all of selection_cli_add_*)
Falsepositives:
  -Unknown
Level: medium