Lacey Cochrane
@NullVectorXUSTrusted contributorCompletionist
11 followers143 downloads2,343 copies55 likes67,608 views
232 detections
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Detects the deployment of MeshCentral remote access agents and the creation of a specific ransom note file on compromised PeopleSoft servers, indicative of ShinyHunters activity. The rule looks for the creation of a file named 'README-IF-YOU-SEE-THIS-YOUVE-BEEN-HACKED.TXT' or the execution of 'meshagent' or 'meshcentral' processes from suspicious directories or initiated by common shell/download utilities.
Detects when an actor searches Slack audit logs, which could indicate an attacker attempting to understand logging capabilities or evade detection. Also detects bulk session resets initiated by an administrator, which may be a response to an account takeover or an attacker attempting to evict legitimate users from their sessions.
Detects the specific ShinyHunters lateral movement pattern involving automated SSH credential spraying using 'sshpass' or rapid SSH connections to multiple hosts with PeopleSoft admin accounts, often after reading '/etc/hosts' for target identification. The rule looks for multiple SSH connections within a 10-minute window from a single host and user, specifically targeting common PeopleSoft-related usernames.
Detects attempts to abuse the device code flow targeting Microsoft Office and Authentication Broker applications from unmanaged and non-compliant devices with unbound tokens. This activity is indicative of device code phishing, where an attacker tricks a user into authenticating a malicious application.
Detects network connections to known ShinyHunters infrastructure, including specific IP addresses and DNS queries for 'azurenetfiles.net', which has been linked to their operations targeting Oracle PeopleSoft servers via gadget chain exploitation.
Okta MFA Push Bombing / Fatigue
Cortex XDR
Detects repeated push denials for the same user within a short timeframe, indicating an active MFA fatigue attack where an adversary is attempting to overwhelm a user with MFA requests in hopes they will eventually approve one.
Detects high volume Google Cloud Storage (GCS) object listing and downloads, which can indicate reconnaissance of cloud storage contents or data exfiltration. The rule aggregates operations by identity, bucket, and project ID over a one-hour period and flags activity exceeding 50 total operations.
Slack Canvas External Access & Tampering
Cortex XDR
Detects external users accessing internal Slack canvases and suspicious canvas deletion or access level changes. Canvases can contain sensitive runbooks, credentials, and organizational data, making these actions critical to monitor for potential data exfiltration or unauthorized access.
Detects attempts to list, read, create, update, or delete Kubernetes secrets via the Kubernetes API server. This activity could indicate an adversary attempting to gain access to sensitive information or manipulate the environment.
Detects the creation or deletion of Kubernetes namespaces and nodes via the API server. This activity can indicate an adversary attempting to establish persistence, expand their control, or disrupt the environment within a Kubernetes cluster.
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