Bitsadmin Activity

Elastic Stack Serverless Security

Windows Background Intelligent Transfer Service (BITS) is a low-bandwidth, asynchronous file transfer mechanism. Adversaries may abuse BITS to persist, download, execute, and even clean up after running malicious code.

Rule type: eql

Rule indices:

• logs-endpoint.events.process-*
• logs-windows.sysmon_operational-*
• endgame-*
• logs-system.security*
• winlogbeat-*

Severity: low

Risk score: 21

Runs every: 60m

Searches indices from: now-119m (https://www.elastic.co/guide/en/elasticsearch/reference/current/common-options.html#date-math[Date Math format], see also Additional look-back time)

Maximum alerts per execution: 100

References: None

Tags:

• Domain: Endpoint
• OS: Windows
• Use Case: Threat Detection
• Tactic: Command and Control
• Data Source: Elastic Defend
• Rule Type: BBR
• Data Source: Sysmon
• Data Source: Elastic Endgame
• Data Source: System

Version: 105

Rule authors:

• Elastic

Rule license: Elastic License v2

process where host.os.type == "windows" and event.type == "start" and
  (
   (process.name : "bitsadmin.exe" and process.args : (
        "*Transfer*", "*Create*", "AddFile", "*SetNotifyFlags*", "*SetNotifyCmdLine*",
        "*SetMinRetryDelay*", "*SetCustomHeaders*", "*Resume*")
   ) or
   (process.name : "powershell.exe" and process.args : (
        "*Start-BitsTransfer*", "*Add-BitsFile*",
        "*Resume-BitsTransfer*", "*Set-BitsTransfer*", "*BITS.Manager*")
   )
  )

Framework: MITRE ATT&CKTM

• Tactic:

  • Name: Command and Control
  • ID: TA0011
  • Reference URL: https://attack.mitre.org/tactics/TA0011/

• Technique:

  • Name: Ingress Tool Transfer
  • ID: T1105
  • Reference URL: https://attack.mitre.org/techniques/T1105/

• Tactic:

  • Name: Defense Evasion
  • ID: TA0005
  • Reference URL: https://attack.mitre.org/tactics/TA0005/

• Technique:

  • Name: BITS Jobs
  • ID: T1197
  • Reference URL: https://attack.mitre.org/techniques/T1197/

• Tactic:

  • Name: Persistence
  • ID: TA0003
  • Reference URL: https://attack.mitre.org/tactics/TA0003/

• Technique:

  • Name: BITS Jobs
  • ID: T1197
  • Reference URL: https://attack.mitre.org/techniques/T1197/