Comprehensive and Detailed
The hijacked administrator account was used across multiple ASNs (indicating different network locations) in a short time, despite MFA and SSO. This suggests a stolen session or token misuse. Let's analyze:
A . Token theft detection with lockouts: Useful for detecting stolen SSO tokens, but it's reactive and may not prevent initial misuse across networks.
B . Context-based authentication: This adds real-time checks (e.g., geolocation, IP changes) to verify login attempts. Given the rapid ASN changes, this proactively mitigates the issue by challenging suspicious logins, aligning with CAS-005's focus on adaptive security.
C . Decentralize accounts: This removes SSO, increasing complexity and weakening MFA enforcement, which isn't practical or secure.
D . Biometric authentication: While strong, it doesn't address the network-hopping behavior and may not integrate easily with SSO.

The table shows that the user "SALES1" is consistently blocked despite having met the MFA requirements.
The common factor in these blocked attempts is the source IP address (8.11.4.16) being identified as from Germany while the user is assigned to France. This discrepancy suggests that the network geolocation is being misidentified by the authentication server, causing legitimate access attempts to be blocked.
Why Network Geolocation Misidentification?
Geolocation Accuracy: Authentication systems often use IP geolocation to verify the location of access attempts. Incorrect geolocation data can lead to legitimate requests being denied if they appear to come from unexpected locations.
Security Policies: Company security policies might block access attempts from certain locations to prevent unauthorized access. If the geolocation is wrong, legitimate users can be inadvertently blocked.
Consistent Pattern: The user "SALES1" from the IP address 8.11.4.16 is always blocked, indicating a consistent issue with geolocation.
Other options do not align with the pattern observed:
A: Bypass MFA requirements: MFA is satisfied, so bypassing MFA is not the issue.
C: Administrator access policy: This is about user access, not specific administrator access.
D: OTP codes: The user has satisfied MFA, so OTP code configuration is not the issue.
References:
CompTIA SecurityX Study Guide
"Geolocation and Authentication," NIST Special Publication 800-63B
"IP Geolocation Accuracy," Cisco Documentation

The SALES1 user is consistently being blocked despite satisfying MFA requirements, and the source IP is in Germany while the user assigned location is France. This indicates that the authentication server might be misidentifying the network geolocation or incorrectly associating the IP address with a different location, leading to the blockage of access.

User and Entity Behavior Analytics (UEBA) is the best solution to help the company overcome challenges associated with suspicious activity that cannot be categorized by traditional detection tools. UEBA uses advanced analytics to establish baselines of normal behavior for users and entities within the network. It then identifies deviations from these baselines, which may indicate malicious activity. This approach is particularly effective for detecting unknown threats and sophisticated attacks that do not match known indicators of compromise (IoCs).
Reference: CompTIA SecurityX Study Guide, Chapter on Advanced Threat Detection and Mitigation, Section on User and Entity Behavior Analytics (UEBA).