O365_Exchange_RecipientPermission_SendAs
ID: 100222
Description:
Add-RecipientPermission SendAs on an Exchange Mailbox - KLK
Repository: Fluency Group: Office365 Type: event
Default Status:
Enabled
Tags: | |||
---|---|---|---|
O365 | Office | Exchange | Mailbox |
Selector:
Query:
Filters:
Standard:
Field | MUST hit |
---|---|
@fields.Operation | Add-RecipientPermission |
@fields.Workload | Exchange |
Field | MUST NOT hit |
---|---|
Additional JSON:
function json_doc_filter (doc)
for i,v in ipairs(doc['@fields'].Parameters)
do
print(v.Name .. ": " .. v.Value)
if v.Name == "AccessRights" and v.Value == "SendAs" then
return true
end
end
return false
end
return json_doc_filter
Behavior Rule:
Key | Type | Behavior Category |
---|---|---|
@fields.UserId | username | application activity |
Risks:
Risks | Base Score | Dimension |
---|---|---|
ALERT_NORMAL | 100 | alert |
Attributes:
Alias | Key |
---|---|
IP | @fields.ClientIP |
ObjectId | @fields.ObjectId |
Operation | @fields.Operation |
ISP | @fields._ip.isp |
City | @fields._ip.city |
Country | @fields._ip.country |
UserId | @fields.UserId |
ExternalAccess | @fields.ExternalAccess |
Identity | @fields.ParametersFields.Identity |
Trustee | @fields.ParametersFields.Trustee |
AccessRights | @fields.ParametersFields.AccessRights |
SubjetUsername | @fields.SubjectUserName |
TargetUsername | @fields.TargetUserName |
SubjectFullName | @fields.SubjectFullName |
TargetFullName | @fields.TargetFullName |
Correlation Rules:
First Occurrence:
Name | Window | Fields |
---|---|---|
NewTarget | 30 days | @fields.ObjectId |
Risks: | ML_NEW_USER | |
NewUser | 30 days | @fields.UserId |
Risks: | ML_NEW_USER |
Aggregation:
Name | Window | Field | AggType | Match |
---|---|---|---|---|
MultipleRecipients | 1 day | @fields.ObjectId | cardinality | gt 1 |
Risks: | ALERT_NORMAL |
History:
User | Date |
---|---|
ke*y@fluencysecurity.com | 2021 Mar 30 04:26:18 EDT |
ke*y@fluencysecurity.com | 2021 Mar 30 08:25:39 EDT |
— | 2021 Apr 6 11:17:43 EDT |
— | 2021 Apr 6 11:18:54 EDT |
ke*y@fluencysecurity.com | 2021 Jun 24 10:25:39 EDT |
em*n@fluencysecurity.com | 2021 Jul 6 23:52:45 EDT |
ho*d@fluencysecurity.com | 2021 Aug 11 15:44:48 EDT |
ho*d@fluencysecurity.com | 2021 Aug 11 16:02:10 EDT |
ke*y@fluencysecurity.com | 2021 Sep 13 06:17:15 EDT |
ke*y@fluencysecurity.com | 2022 Feb 18 01:05:13 EST |
This page was automatically created/formatted on Wed, 2022 May 4 21:43:53 EDT, from rule_dump.json (4d88bffdfb1cea26b3985f2193033606)