Malware in the recycle bin (Normalized Process Events)
Id | 61988db3-0565-49b5-b8e3-747195baac6e |
Rulename | Malware in the recycle bin (Normalized Process Events) |
Description | Identifies malware that has been hidden in the recycle bin. To use this analytics rule, make sure you have deployed the ASIM normalization parsers |
Severity | Medium |
Tactics | DefenseEvasion |
Techniques | T1564 |
Kind | Scheduled |
Query frequency | 1d |
Query period | 1d |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/imProcess_malware_in_recyclebin.yaml |
Version | 1.2.3 |
Arm template | 61988db3-0565-49b5-b8e3-747195baac6e.json |
let procList = dynamic(["cmd.exe","ftp.exe","schtasks.exe","powershell.exe","rundll32.exe","regsvr32.exe","msiexec.exe"]);
imProcessCreate
| where CommandLine has "recycler"
| where Process has_any (procList)
| extend FileName = tostring(split(Process, '\\')[-1])
| where FileName in~ (procList)
| project StartTimeUtc = TimeGenerated, Dvc, User, Process, FileName, CommandLine, ActingProcessName, EventVendor, EventProduct
| extend timestamp = StartTimeUtc, AccountCustomEntity = User, HostCustomEntity = Dvc
metadata:
author:
name: Yuval Naor
support:
tier: Community
source:
kind: Community
categories:
domains:
- Security - Threat Protection
severity: Medium
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/imProcess_malware_in_recyclebin.yaml
description: |
'Identifies malware that has been hidden in the recycle bin.
To use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'
tags:
- Id: b8266f81-2715-41a6-9062-42486cbc9c73
version: 1.0.0
- SchemaVersion: 0.1.0
Schema: ASIMProcessEvent
triggerOperator: gt
queryPeriod: 1d
requiredDataConnectors: []
queryFrequency: 1d
triggerThreshold: 0
tactics:
- DefenseEvasion
query: |
let procList = dynamic(["cmd.exe","ftp.exe","schtasks.exe","powershell.exe","rundll32.exe","regsvr32.exe","msiexec.exe"]);
imProcessCreate
| where CommandLine has "recycler"
| where Process has_any (procList)
| extend FileName = tostring(split(Process, '\\')[-1])
| where FileName in~ (procList)
| project StartTimeUtc = TimeGenerated, Dvc, User, Process, FileName, CommandLine, ActingProcessName, EventVendor, EventProduct
| extend timestamp = StartTimeUtc, AccountCustomEntity = User, HostCustomEntity = Dvc
kind: Scheduled
relevantTechniques:
- T1564
version: 1.2.3
id: 61988db3-0565-49b5-b8e3-747195baac6e
entityMappings:
- fieldMappings:
- columnName: AccountCustomEntity
identifier: FullName
entityType: Account
- fieldMappings:
- columnName: HostCustomEntity
identifier: FullName
entityType: Host
name: Malware in the recycle bin (Normalized Process Events)
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/61988db3-0565-49b5-b8e3-747195baac6e')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/61988db3-0565-49b5-b8e3-747195baac6e')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01-preview",
"properties": {
"displayName": "Malware in the recycle bin (Normalized Process Events)",
"description": "'Identifies malware that has been hidden in the recycle bin.\nTo use this analytics rule, make sure you have deployed the [ASIM normalization parsers](https://aka.ms/ASimProcessEvent)'\n",
"severity": "Medium",
"enabled": true,
"query": "let procList = dynamic([\"cmd.exe\",\"ftp.exe\",\"schtasks.exe\",\"powershell.exe\",\"rundll32.exe\",\"regsvr32.exe\",\"msiexec.exe\"]); \nimProcessCreate\n| where CommandLine has \"recycler\"\n| where Process has_any (procList)\n| extend FileName = tostring(split(Process, '\\\\')[-1])\n| where FileName in~ (procList)\n| project StartTimeUtc = TimeGenerated, Dvc, User, Process, FileName, CommandLine, ActingProcessName, EventVendor, EventProduct\n| extend timestamp = StartTimeUtc, AccountCustomEntity = User, HostCustomEntity = Dvc\n",
"queryFrequency": "P1D",
"queryPeriod": "P1D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion"
],
"techniques": [
"T1564"
],
"alertRuleTemplateName": "61988db3-0565-49b5-b8e3-747195baac6e",
"customDetails": null,
"entityMappings": [
{
"entityType": "Account",
"fieldMappings": [
{
"columnName": "AccountCustomEntity",
"identifier": "FullName"
}
]
},
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "HostCustomEntity",
"identifier": "FullName"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Detections/ASimProcess/imProcess_malware_in_recyclebin.yaml",
"tags": [
{
"Id": "b8266f81-2715-41a6-9062-42486cbc9c73",
"version": "1.0.0"
},
{
"Schema": "ASIMProcessEvent",
"SchemaVersion": "0.1.0"
}
],
"templateVersion": "1.2.3"
}
}
]
}