Analytics Story: Compromised User Account

Date: 2023-01-19 ID: 19669154-e9d1-4a01-b144-e6592a078092 Author: Mauricio Velazco, Bhavin Patel, Splunk Product: Splunk Enterprise Security

Description

Monitor for activities and techniques associated with Compromised User Account attacks.

Why it matters

Compromised User Account occurs when cybercriminals gain unauthorized access to accounts by using different techniques like brute force, social engineering, phishing & spear phishing, credential stuffing, etc. By posing as the real user, cyber-criminals can change account details, send out phishing emails, steal financial information or sensitive data, or use any stolen information to access further accounts within the organization. This analytic story groups detections that can help security operations teams identify the potential signs of Compromised User Accounts.

Detections

Name ▲▼	Technique ▲▼	Type ▲▼
Detect Distributed Password Spray Attempts	Password Spraying, Brute Force	Hunting
Detect Password Spray Attempts	Password Spraying, Brute Force	TTP
PingID Mismatch Auth Source and Verification Response	Multi-Factor Authentication Request Generation, Multi-Factor Authentication, Device Registration	TTP
PingID Multiple Failed MFA Requests For User	Multi-Factor Authentication Request Generation, Valid Accounts, Brute Force	TTP
PingID New MFA Method After Credential Reset	Multi-Factor Authentication Request Generation, Multi-Factor Authentication, Device Registration	TTP
PingID New MFA Method Registered For User	Multi-Factor Authentication Request Generation, Multi-Factor Authentication, Device Registration	TTP
Abnormally High Number Of Cloud Infrastructure API Calls	Cloud Accounts, Valid Accounts	Anomaly
ASL AWS Concurrent Sessions From Different Ips	Browser Session Hijacking	Anomaly
AWS Concurrent Sessions From Different Ips	Browser Session Hijacking	TTP
AWS Console Login Failed During MFA Challenge	Compromise Accounts, Cloud Accounts, Multi-Factor Authentication Request Generation	TTP
AWS High Number Of Failed Authentications For User	Password Policy Discovery	Anomaly
AWS High Number Of Failed Authentications From Ip	Brute Force, Password Spraying, Credential Stuffing	Anomaly
AWS Multiple Users Failing To Authenticate From Ip	Brute Force, Password Spraying, Credential Stuffing	Anomaly
AWS Password Policy Changes	Password Policy Discovery	Hunting
AWS Successful Console Authentication From Multiple IPs	Compromise Accounts, Unused/Unsupported Cloud Regions	Anomaly
Azure AD Concurrent Sessions From Different Ips	Browser Session Hijacking	TTP
Azure AD High Number Of Failed Authentications For User	Brute Force, Password Guessing	TTP
Azure AD High Number Of Failed Authentications From Ip	Brute Force, Password Guessing, Password Spraying	TTP
Azure AD New MFA Method Registered For User	Modify Authentication Process, Multi-Factor Authentication	TTP
Azure AD Successful Authentication From Different Ips	Brute Force, Password Guessing, Password Spraying	TTP
Detect AWS Console Login by User from New City	Compromise Accounts, Cloud Accounts, Unused/Unsupported Cloud Regions	Hunting
Detect AWS Console Login by User from New Country	Compromise Accounts, Cloud Accounts, Unused/Unsupported Cloud Regions	Hunting
Detect AWS Console Login by User from New Region	Compromise Accounts, Cloud Accounts, Unused/Unsupported Cloud Regions	Hunting
ASL AWS Password Policy Changes	Password Policy Discovery	Hunting
Detect Password Spray Attack Behavior From Source	Password Spraying, Brute Force	TTP
Detect Password Spray Attack Behavior On User	Password Spraying, Brute Force	TTP

Data Sources

Name ▲▼	Platform ▲▼	Sourcetype ▲▼	Source ▲▼
AWS CloudTrail	AWS	`aws:cloudtrail`	`aws_cloudtrail`
AWS CloudTrail ConsoleLogin	AWS	`aws:cloudtrail`	`aws_cloudtrail`
AWS CloudTrail DeleteAccountPasswordPolicy	AWS	`aws:cloudtrail`	`aws_cloudtrail`
AWS CloudTrail DescribeEventAggregates	AWS	`aws:cloudtrail`	`aws_cloudtrail`
AWS CloudTrail GetAccountPasswordPolicy	AWS	`aws:cloudtrail`	`aws_cloudtrail`
AWS CloudTrail UpdateAccountPasswordPolicy	AWS	`aws:cloudtrail`	`aws_cloudtrail`
Azure Active Directory	Azure	`azure:monitor:aad`	`Azure AD`
Azure Active Directory Sign-in activity	Azure	`azure:monitor:aad`	`Azure AD`
Azure Active Directory User registered security info	Azure	`azure:monitor:aad`	`Azure AD`
PingID	N/A	`XmlWinEventLog`	`XmlWinEventLog:Security`
Windows Event Log Security 4625	Windows	`xmlwineventlog`	`XmlWinEventLog:Security`

References

https://www.proofpoint.com/us/threat-reference/compromised-account

Source: GitHub | Version: 1