Corelight - Multiple Compressed Files Transferred over HTTP
Id | 4e55e306-3022-43a1-870a-41c4d5116079 |
Rulename | Corelight - Multiple Compressed Files Transferred over HTTP |
Description | Detects compressed archives transferre over HTTP. |
Severity | Medium |
Tactics | Exfiltration |
Required data connectors | Corelight |
Kind | Scheduled |
Query frequency | 1h |
Query period | 1h |
Trigger threshold | 0 |
Trigger operator | gt |
Source Uri | https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Corelight/Analytic Rules/CorelightMultipleCompressedFilesTransferredOverHTTP.yaml |
Version | 1.0.0 |
Arm template | 4e55e306-3022-43a1-870a-41c4d5116079.json |
let threshold = 25;
Corelight
| where EventType =~ 'http'
| where HttpRequestMethod in~ ('POST', 'PUT')
| where isempty(HttpReferrerOriginal)
| where SrcMimeType in~ ('application/vnd.ms-cab-compressed', 'application/warc', 'application/x-7z-compressed', 'application/x-ace', 'application/x-arc', 'application/x-archive', 'application/x-arj', 'application/x-compress', 'application/x-cpio', 'application/x-dmg', 'application/x-eet', 'application/x-gzip', 'application/x-lha', 'application/x-lrzip', 'application/x-lz4', 'application/x-lzma', 'application/x-lzh', 'application/x-lzip', 'application/x-rar', 'application/x-rpm', 'application/x-stuffit', 'application/x-tar', 'application/x-xz', 'application/x-zoo', 'application/zip')
| summarize count() by UrlOriginal, SrcIpAddr, bin(TimeGenerated, 15m)
| where count_ > threshold
| extend IPCustomEntity = SrcIpAddr
triggerOperator: gt
version: 1.0.0
query: |
let threshold = 25;
Corelight
| where EventType =~ 'http'
| where HttpRequestMethod in~ ('POST', 'PUT')
| where isempty(HttpReferrerOriginal)
| where SrcMimeType in~ ('application/vnd.ms-cab-compressed', 'application/warc', 'application/x-7z-compressed', 'application/x-ace', 'application/x-arc', 'application/x-archive', 'application/x-arj', 'application/x-compress', 'application/x-cpio', 'application/x-dmg', 'application/x-eet', 'application/x-gzip', 'application/x-lha', 'application/x-lrzip', 'application/x-lz4', 'application/x-lzma', 'application/x-lzh', 'application/x-lzip', 'application/x-rar', 'application/x-rpm', 'application/x-stuffit', 'application/x-tar', 'application/x-xz', 'application/x-zoo', 'application/zip')
| summarize count() by UrlOriginal, SrcIpAddr, bin(TimeGenerated, 15m)
| where count_ > threshold
| extend IPCustomEntity = SrcIpAddr
status: Available
entityMappings:
- entityType: IP
fieldMappings:
- columnName: IPCustomEntity
identifier: Address
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Corelight/Analytic Rules/CorelightMultipleCompressedFilesTransferredOverHTTP.yaml
queryFrequency: 1h
requiredDataConnectors:
- connectorId: Corelight
dataTypes:
- Corelight
name: Corelight - Multiple Compressed Files Transferred over HTTP
queryPeriod: 1h
severity: Medium
kind: Scheduled
tactics:
- Exfiltration
id: 4e55e306-3022-43a1-870a-41c4d5116079
description: |
'Detects compressed archives transferre over HTTP.'
triggerThreshold: 0
{
"$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/4e55e306-3022-43a1-870a-41c4d5116079')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4e55e306-3022-43a1-870a-41c4d5116079')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01-preview",
"properties": {
"displayName": "Corelight - Multiple Compressed Files Transferred over HTTP",
"description": "'Detects compressed archives transferre over HTTP.'\n",
"severity": "Medium",
"enabled": true,
"query": "let threshold = 25;\nCorelight\n| where EventType =~ 'http'\n| where HttpRequestMethod in~ ('POST', 'PUT')\n| where isempty(HttpReferrerOriginal)\n| where SrcMimeType in~ ('application/vnd.ms-cab-compressed', 'application/warc', 'application/x-7z-compressed', 'application/x-ace', 'application/x-arc', 'application/x-archive', 'application/x-arj', 'application/x-compress', 'application/x-cpio', 'application/x-dmg', 'application/x-eet', 'application/x-gzip', 'application/x-lha', 'application/x-lrzip', 'application/x-lz4', 'application/x-lzma', 'application/x-lzh', 'application/x-lzip', 'application/x-rar', 'application/x-rpm', 'application/x-stuffit', 'application/x-tar', 'application/x-xz', 'application/x-zoo', 'application/zip')\n| summarize count() by UrlOriginal, SrcIpAddr, bin(TimeGenerated, 15m)\n| where count_ > threshold\n| extend IPCustomEntity = SrcIpAddr\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Exfiltration"
],
"alertRuleTemplateName": "4e55e306-3022-43a1-870a-41c4d5116079",
"customDetails": null,
"entityMappings": [
{
"fieldMappings": [
{
"columnName": "IPCustomEntity",
"identifier": "Address"
}
],
"entityType": "IP"
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Corelight/Analytic Rules/CorelightMultipleCompressedFilesTransferredOverHTTP.yaml",
"status": "Available",
"templateVersion": "1.0.0"
}
}
]
}