Detection rules › Kusto
Progress MOVEIt File transfer above threshold
Identifies Progress MOVEIt File Transfers above certain threshold in a 15min time period. Please note that entity mapping for arrays is not supported, so when there is a single value in an array, we will pull that value from the array as a single string to populate the entity to support entity mapping features within Sentinel. Additionally, if the array is multivalued, we will input a string to indicate this with a unique hash so that matching will not occur.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Exfiltration |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| MOVEit-DMZ-Audit | Event ID 0: MOVEit file-transfer audit record |
Rule body
id: 9bd18b63-f1ca-4375-95db-39fda00bfe20
name: Progress MOVEIt File transfer above threshold
description: |
'Identifies Progress MOVEIt File Transfers above certain threshold in a 15min time period.
Please note that entity mapping for arrays is not supported, so when there is a single value in an array, we will pull that value from the array as a single string to populate the entity to support entity mapping features within Sentinel. Additionally, if the array is multivalued, we will input a string to indicate this with a unique hash so that matching will not occur.'
severity: Medium
requiredDataConnectors:
- connectorId: WindowsForwardedEvents
dataTypes:
- WindowsEvent
queryFrequency: 15m
queryPeriod: 15m
triggerOperator: gt
triggerThreshold: 0
tactics:
- Exfiltration
relevantTechniques:
- T1020
query: |
let threshold = 500;
Event
| where EventID == 0 and Source == "MOVEit DMZ Audit" and EventLog == "Application"
| where RenderedDescription has_any ("Downloaded", "Uploaded")
| parse RenderedDescription with * "User '" userdisplayname "' (" *
| parse RenderedDescription with * "IPAddress: " ipaddress " FileID:" * " FileName: " filename " FolderID: " folderid " FolderPath: " folderpath " Username: " username " AgentBrand: " *
| summarize count_=count(), fileslist=make_set(filename) by Computer,userdisplayname,ipaddress,bin(TimeGenerated, 1d)
| where count_ >= threshold
| extend FileSample = iff(array_length(fileslist) == 1, tostring(fileslist[0]), strcat("SeeFilesListField","_", tostring(hash(tostring(fileslist)))))
entityMappings:
- entityType: Account
fieldMappings:
- identifier: Name
columnName: userdisplayname
- entityType: IP
fieldMappings:
- identifier: Address
columnName: ipaddress
- entityType: Host
fieldMappings:
- identifier: HostName
columnName: Computer
- entityType: File
fieldMappings:
- identifier: Name
columnName: FileSample
customDetails:
TransferCount: count_
FilesList: fileslist
incidentConfiguration:
createIncident: true
groupingConfiguration:
enabled: true
reopenClosedIncident: false
lookbackDuration: 5h
matchingMethod: Selected
groupByEntities:
- Account
- Host
version: 1.0.2
kind: Scheduled
Stages and Predicates
Parameters
let threshold = 500;
Stage 1: source
Event
Stage 2: where
| where EventID == 0 and Source == "MOVEit DMZ Audit" and EventLog == "Application"
Stage 3: where
| where RenderedDescription has_any ("Downloaded", "Uploaded")
Stage 4: parse
| parse RenderedDescription with * "User '" userdisplayname "' (" *
Stage 5: parse
| parse RenderedDescription with * "IPAddress: " ipaddress " FileID:" * " FileName: " filename " FolderID: " folderid " FolderPath: " folderpath " Username: " username " AgentBrand: " *
Stage 6: summarize
| summarize count_=count(), fileslist=make_set(filename) by Computer,userdisplayname,ipaddress,bin(TimeGenerated, 1d)
Stage 7: where
| where count_ >= threshold
Stage 8: extend
| extend FileSample = iff(array_length(fileslist) == 1, tostring(fileslist[0]), strcat("SeeFilesListField","_", tostring(hash(tostring(fileslist)))))
FileSample =if
fileslist == 1tostring(fileslist[0])else
strcat("SeeFilesListField", "_", tostring(hash(tostring(fileslist))))Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
EventID | eq |
| field:"EventID" kind:eq value:"0" |
EventLog | eq |
| field:"EventLog" kind:eq value:"Application" |
RenderedDescription | match |
| field:"RenderedDescription" kind:match |
count_ | ge |
| field:"count_" kind:ge value:"500" |
Output fields
These fields are emitted when the rule matches.
| Field | Source |
|---|---|
Computer | summarize |
count_ | summarize |
fileslist | summarize |
ipaddress | summarize |
userdisplayname | summarize |
FileSample | extend |