name: Detect SharpHound Usage
id: dd04b29a-beed-11eb-87bc-acde48001122
version: 2
date: '2021-05-27'
author: Michael Haag, Splunk
status: production
type: TTP
description: The following analytic identifies SharpHound binary usage by using the
  original filena,e. In addition to renaming the PE, other coverage is available to
  detect command-line arguments. This particular analytic looks for the original_file_name
  of `SharpHound.exe` and the process name. It is possible older instances of SharpHound.exe
  have different original filenames. Dependent upon the operator, the code may be
  re-compiled and the attributes removed or changed to anything else. During triage,
  review the metadata of the binary in question. Review parallel processes for suspicious
  behavior. Identify the source of this binary.
data_source:
- Sysmon Event ID 1
search:
  selection1:
    OriginalFileName: SharpHound.exe
  selection2:
    Image|endswith: sharphound.exe
  condition: (selection1 or selection2)
how_to_implement: To successfully implement this search you need to be ingesting information
  on process that include the name of the process responsible for the changes from
  your endpoints into the `Endpoint` datamodel in the `Processes` node. In addition,
  confirm the latest CIM App 4.20 or higher is installed and the latest TA for the
  endpoint product.
known_false_positives: False positives should be limited as this is specific to a
  file attribute not used by anything else. Filter as needed.
references:
- https://attack.mitre.org/software/S0521/
- https://thedfirreport.com/?s=bloodhound
- https://github.com/BloodHoundAD/BloodHound/tree/master/Collectors
- https://github.com/BloodHoundAD/SharpHound3
- https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1059.001/T1059.001.md#atomic-test-2---run-bloodhound-from-local-disk
tags:
  analytic_story:
  - Discovery Techniques
  - Ransomware
  asset_type: Endpoint
  confidence: 80
  impact: 30
  message: Potential SharpHound binary identified on $dest$
  mitre_attack_id:
  - T1087.002
  - T1069.001
  - T1482
  - T1087.001
  - T1087
  - T1069.002
  - T1069
  observable:
  - name: dest
    type: Endpoint
    role:
    - Victim
  product:
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  risk_score: 24
  security_domain: endpoint
tests:
- name: True Positive Test
  attack_data:
  - data: https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/attack_techniques/T1059.001/sharphound/windows-sysmon.log
    source: XmlWinEventLog:Microsoft-Windows-Sysmon/Operational
    sourcetype: xmlwineventlog