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r_m_skysea_clientview_Data_Leak.md

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Vendor: SkySea

Product: ClientView

Use-Case: Data Leak

Rules Models MITRE TTPs Event Types Parsers
41 18 8 12 12
Event Type Rules Models
app-activity T1048 - Exfiltration Over Alternative Protocol
EM-InRule-Fin: User has created an inbox forwarding rule to forward emails containing financial keywords

T1114.003 - Email Collection: Email Forwarding Rule
EM-InRule-EX: User has created an inbox forwarding rule to forward email to an external domain email
EM-InRule-Public: User has created an inbox forwarding rule to forward email to a public email domain
dlp-email-alert-out T1048.003 - Exfiltration Over Alternative Protocol: Exfiltration Over Unencrypted/Obfuscated Non-C2 Protocol
EM-BSum-first: Large amount of data in email for user with no history
EM-Bytes: Abnormally large outbound email for user
EM-Competition: Email to competition
EM-country-F: First email to country for the organization
EM-country-A: Abnormal email to country for the organization
EM-Gcountry-F: First email to country for the peer group
EM-Gcountry-A: Abnormal email to country
EM-Ucountry-F: First email to country for the user
EM-Ucountry-A: Abnormal email to country for the user
EM-UD-F: First email domain for user
EM-UD-A: Abnormal email domain for user
EM-GD-F: First email domain for group
EM-GD-A: Abnormal email domain for group
EM-OD-F: First email domain for organization
EM-OD-A: Abnormal email domain for organization
EM-G-EXEC-A: Abnormal for this peer group has forwarded/sent an email from an executive user
EM-EXEC-Personal: Email sent by an Executive user is forwarded to personal email
EM-EXEC-Public: Email sent by an Executive user is forwarded to public email
EM-PublicDomain: Email has been sent to public email domain from company email
EM-BSum-5MB: Over 5MB of data emailed to personal email domain.
EM-Personal-PrivacySize: Email with privacy keywords in subject is sent to personal email address from company email address and the email is larger than 10KB
EM-PersonalEmail: Email sent to their personal email from company email
EM-UFEXT-A: Abnormal file attachment type in email for user
EM-GFEXT-A: Abnormal file attachment type in email for peer group
EM-OFEXT-A: Abnormal file attachment type in email for organization
EM-Attachments: Abnormal number of attachments in outbound email for user
EM-File: Source code file found in outgoing email attachment
EM-Confidential-File: Confidential file found in outgoing email attachment
EM-N-SUM-20: Over 20MB sent by a new user over email

T1048 - Exfiltration Over Alternative Protocol
EM-DED: Email to a disposable email domain

T1020 - Automated Exfiltration
FEM-FU: Emailing a previously failed attachment
EM-Attachments: Attachments per Email
EM-OFEXT: Email file attachment types in the organization
EM-GFEXT: Email file attachment types in the peer group
EM-UFEXT: Email file attachment types by the user
EM-UD: Domains per user
EM-EXEC: E-mail subjects sent by an executive user
EM-G-EXEC: Peer groups that send emails from executives
FEM-FU: Users per file names in failed outgoing emails
EM-OD: Domains per organization
EM-GD: Domains per group
EM-Ucountry: Email Countries from/to user
EM-Gcountry: Email Countries from/to peer group
EM-country: Email Countries
EM-Bytes: Bytes per Email to external domains
EM-BSum-personal: Sum of bytes in outgoing emails to personal domains
file-write T1114.001 - T1114.001
FA-Outlook-pst: A file ends with either pst or ost
web-activity-allowed T1030 - Data Transfer Size Limits
A-WEB-EXFIL-ASSET: Large amount of data exfiltrated from host
WEB-New-File-20: User with no web activity history has uploaded 20MB or more

T1071.001 - Application Layer Protocol: Web Protocols
WEB-OUa-Browser-F: First activity using this web browser for the organization
WEB-FS: User has accessed a file sharing domain
WEB-OU-FS: One of the top file sharing users in the organization
WEB-OG-FS: One of the top file sharing users in the peer group

T1567.002 - Exfiltration Over Web Service: Exfiltration to Cloud Storage
WEB-FS: User has accessed a file sharing domain
WEB-OU-FS: One of the top file sharing users in the organization
WEB-OG-FS: One of the top file sharing users in the peer group
WEB-OG-FS: File sharing activities of users in the peer group
WEB-OU-FS: File sharing activities of users in the organization
WEB-OUa-Browser-New: Top web browsers being used in this organization