Potential re-named sdelete usage ASIM Version

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Id	5b6ae038-f66e-4f74-9315-df52fd492be4
Rulename	Potential re-named sdelete usage (ASIM Version)
Description	This detection looks for command line parameters associated with the use of Sysinternals sdelete (https://docs.microsoft.com/sysinternals/downloads/sdelete) to delete multiple files on a host’s C drive. A threat actor may re-name the tool to avoid detection and then use it for destructive attacks on a host. This detection uses the ASIM imProcess parser, this will need to be deployed before use - https://docs.microsoft.com/azure/sentinel/normalization
Severity	Low
Tactics	DefenseEvasion Impact
Techniques	T1485 T1036
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/Potentialre-namedsdeleteusage(ASIMVersion).yaml
Version	1.0.6
Arm template	5b6ae038-f66e-4f74-9315-df52fd492be4.json

KQL

imProcess
| where CommandLine has_all ("accepteula", "-s", "-r", "-q")
| where Process !endswith "sdelete.exe"
| where CommandLine !has "sdelete"
| extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])

YAML

relevantTechniques:
- T1485
- T1036
entityMappings:
- fieldMappings:
  - columnName: ActorUsername
    identifier: FullName
  - columnName: AccountName
    identifier: Name
  - columnName: AccountNTDomain
    identifier: NTDomain
  entityType: Account
- fieldMappings:
  - columnName: Dvc
    identifier: FullName
  - columnName: DvcHostname
    identifier: HostName
  - columnName: DvcDomain
    identifier: DnsDomain
  entityType: Host
- fieldMappings:
  - columnName: DvcIpAddr
    identifier: Address
  entityType: IP
triggerThreshold: 0
description: |
  'This detection looks for command line parameters associated with the use of Sysinternals sdelete (https://docs.microsoft.com/sysinternals/downloads/sdelete) to delete multiple files on a host's C drive.
  A threat actor may re-name the tool to avoid detection and then use it for destructive attacks on a host.
  This detection uses the ASIM imProcess parser, this will need to be deployed before use - https://docs.microsoft.com/azure/sentinel/normalization'  
metadata:
  author:
    name: Microsoft Security Research
  source:
    kind: Community
  categories:
    domains:
    - Security - Threat Protection
  support:
    tier: Community
requiredDataConnectors: []
triggerOperator: gt
version: 1.0.6
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/Potentialre-namedsdeleteusage(ASIMVersion).yaml
id: 5b6ae038-f66e-4f74-9315-df52fd492be4
queryFrequency: 1h
query: |
  imProcess
  | where CommandLine has_all ("accepteula", "-s", "-r", "-q")
  | where Process !endswith "sdelete.exe"
  | where CommandLine !has "sdelete"
  | extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])  
severity: Low
queryPeriod: 1h
name: Potential re-named sdelete usage (ASIM Version)
tactics:
- DefenseEvasion
- Impact
kind: Scheduled

ARM