Detection rules › Kusto

AV detections related to Ukraine threats

Status
available
Severity
high
Time window
1d
Source
github.com/Azure/Azure-Sentinel

'This query looks for Microsoft Defender AV detections for malware observed in relation to the war in Ukraine. Ref: https://msrc-blog.microsoft.com/2022/02/28/analysis-resources-cyber-threat-activity-ukraine/ '

MITRE ATT&CK coverage

TacticTechniques
ImpactT1485 Data Destruction

Rule body kusto

id: b6685757-3ed1-4b05-a5bd-2cacadc86c2a
name: AV detections related to Ukraine threats
description: |
  'This query looks for Microsoft Defender AV detections for malware observed in relation to the war in Ukraine.
    Ref: https://msrc-blog.microsoft.com/2022/02/28/analysis-resources-cyber-threat-activity-ukraine/ '
severity: High
status: Available
requiredDataConnectors:
  - connectorId: MicrosoftThreatProtection
    dataTypes:
      - SecurityAlert
queryFrequency: 1d
queryPeriod: 1d
triggerOperator: gt
triggerThreshold: 0
tactics:
  - Impact
relevantTechniques:
  - T1485
query: |
  let UA_threats = dynamic(["FoxBlade", "WhisperGate", "Lasainraw", "SonicVote", "CaddyWiper", "AprilAxe", "FiberLake", "Industroyer", "DesertBlade"]);
  SecurityAlert
  | where ProviderName =~ "MDATP"
  | extend ThreatFamilyName = tostring(parse_json(ExtendedProperties).ThreatFamilyName)
  | where ThreatFamilyName in~ (UA_threats)
  | extend HostName = tostring(split(CompromisedEntity, ".")[0]), DomainIndex = toint(indexof(CompromisedEntity, '.'))
  | extend HostNameDomain = iff(DomainIndex != -1, substring(CompromisedEntity, DomainIndex + 1), CompromisedEntity)
entityMappings:
  - entityType: Host
    fieldMappings:
      - identifier: FullName 
        columnName: CompromisedEntity
      - identifier: HostName
        columnName: HostName
      - identifier: DnsDomain
        columnName: HostNameDomain
version: 1.1.3
kind: Scheduled

Stages and Predicates

Parameters

let UA_threats = dynamic(["FoxBlade", "WhisperGate", "Lasainraw", "SonicVote", "CaddyWiper", "AprilAxe", "FiberLake", "Industroyer", "DesertBlade"]);

Stage 1: source

SecurityAlert

Stage 2: where

| where ProviderName =~ "MDATP"

Stage 3: extend

| extend ThreatFamilyName = tostring(parse_json(ExtendedProperties).ThreatFamilyName)

Stage 4: where

| where ThreatFamilyName in~ (UA_threats)

Stage 5: extend

| extend HostName = tostring(split(CompromisedEntity, ".")[0]), DomainIndex = toint(indexof(CompromisedEntity, '.'))

Stage 6: extend

| extend HostNameDomain = iff(DomainIndex != -1, substring(CompromisedEntity, DomainIndex + 1), CompromisedEntity)
HostNameDomain =
ifDomainIndex != -1substring(CompromisedEntity, (DomainIndex + 1))
elseCompromisedEntity

Indicators

Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.

FieldKindValues
ProviderNameeq
  • MDATP corpus 13 (kusto 13)
ThreatFamilyNamein
  • AprilAxe
  • CaddyWiper
  • DesertBlade
  • FiberLake
  • FoxBlade
  • Industroyer
  • Lasainraw
  • SonicVote
  • WhisperGate

Output fields

Fields the rule emits when it matches. Chronicle authors list these in the outcome block; they appear on the detection and $risk_score drives alerting. Sentinel / Defender XDR rules build them up through project / summarize / extend stages. Sentinel maps these into alert fields via entityMappings and customDetails; Defender XDR custom detections surface them as alert fields directly.

FieldSource
ThreatFamilyNameextend
DomainIndexextend
HostNameextend
HostNameDomainextend