74 строки
3.5 KiB
YAML
74 строки
3.5 KiB
YAML
id: 29a29e5d-354e-4f5e-8321-8b39d25047bf
|
|
name: Dev-0228 File Path Hashes November 2021 (ASIM Version)
|
|
description: |
|
|
'This hunting query looks for file paths/hashes related to observed activity by Dev-0228. The actor is known to use custom version of popular tool like PsExec, Procdump etc. to carry its activity.
|
|
The risk score associated with each result is based on a number of factors, hosts with higher risk events should be investigated first.
|
|
This query uses the Microsoft Sentinel Information Model - https://docs.microsoft.com/azure/sentinel/normalization'
|
|
severity: High
|
|
requiredDataConnectors: []
|
|
queryFrequency: 6h
|
|
queryPeriod: 6h
|
|
triggerOperator: gt
|
|
triggerThreshold: 0
|
|
tactics:
|
|
- CredentialAccess
|
|
- Execution
|
|
relevantTechniques:
|
|
- T1569
|
|
- T1003
|
|
query: |
|
|
let files1 = dynamic(["C:\\Windows\\TAPI\\lsa.exe", "C:\\Windows\\TAPI\\pa.exe", "C:\\Windows\\TAPI\\pc.exe", "C:\\Windows\\TAPI\\Rar.exe"]);
|
|
let files2 = dynamic(["svchost.exe","wdmsvc.exe"]);
|
|
let FileHash1 = dynamic(["43109fbe8b752f7a9076eaafa417d9ae5c6e827cd5374b866672263fdebd5ec3", "ab50d8d707b97712178a92bbac74ccc2a5699eb41c17aa77f713ff3e568dcedb", "010e32be0f86545e116a8bc3381a8428933eb8789f32c261c81fd5e7857d4a77", "56cd102b9fc7f3523dad01d632525ff673259dbc9a091be0feff333c931574f7"]);
|
|
let FileHash2 = dynamic(["2a1044e9e6e87a032f80c6d9ea6ae61bbbb053c0a21b186ecb3b812b49eb03b7", "9ab7e99ed84f94a7b6409b87e56dc6e1143b05034a5e4455e8c555dbbcd0d2dd", "18a072ccfab239e140d8f682e2874e8ff19d94311fc8bb9564043d3e0deda54b"]);
|
|
imProcessCreate
|
|
| where ((Process has_any (files1)) and (ActingProcessSHA256 has_any (FileHash1))) or ((Process has_any (files2)) and (ActingProcessSHA256 has_any (FileHash2)))
|
|
// Increase risk score if recent alerts for the host
|
|
| join kind=leftouter (
|
|
SecurityAlert
|
|
| where ProviderName =~ "MDATP"
|
|
| extend ThreatName = tostring(parse_json(ExtendedProperties).ThreatName)
|
|
| mv-expand todynamic(Entities)
|
|
| extend DvcId = tostring(parse_json(Entities).MdatpDeviceId)
|
|
| where isnotempty(DvcId)
|
|
// Higher risk score are for Defender alerts related to threat actor
|
|
| extend AlertRiskScore = iif(ThreatName has_any ("Backdoor:MSIL/ShellClient.A", "Backdoor:MSIL/ShellClient.A!dll", "Trojan:MSIL/Mimikatz.BA!MTB"), 1.0, 0.5)
|
|
| project DvcId, AlertRiskScore)
|
|
on DvcId
|
|
| extend AlertRiskScore = iif(isempty(AlertRiskScore), 0.0, AlertRiskScore)
|
|
| extend AccountName = tostring(split(ActorUsername, @'\')[1]), AccountNTDomain = tostring(split(ActorUsername, @'\')[0])
|
|
| extend HostName = tostring(split(Dvc, ".")[0]), DomainIndex = toint(indexof(Dvc, '.'))
|
|
| extend HostNameDomain = iff(DomainIndex != -1, substring(Dvc, DomainIndex + 1), Dvc)
|
|
| project-away DomainIndex
|
|
entityMappings:
|
|
- entityType: Account
|
|
fieldMappings:
|
|
- identifier: FullName
|
|
columnName: ActorUsername
|
|
- identifier: Name
|
|
columnName: AccountName
|
|
- identifier: NTDomain
|
|
columnName: AccountNTDomain
|
|
- entityType: Host
|
|
fieldMappings:
|
|
- identifier: FullName
|
|
columnName: Dvc
|
|
- identifier: HostName
|
|
columnName: HostName
|
|
- identifier: DnsDomain
|
|
columnName: HostNameDomain
|
|
- entityType: File
|
|
fieldMappings:
|
|
- identifier: Name
|
|
columnName: FileName
|
|
version: 1.2.2
|
|
kind: Scheduled
|
|
metadata:
|
|
source:
|
|
kind: Community
|
|
author:
|
|
name: Microsoft Security Research
|
|
support:
|
|
tier: Community
|
|
categories:
|
|
domains: [ "Security - Threat Intelligence" ] |