Analytics Alerts

Browse the Cortex analytics alert reference.

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1 alert match the current filters. technique: T1098 ✕

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  • Suspicious cloud compute instance SSH keys modification attempt Informational Cloud 7 variations

    An identity attempted to modify the SSH keys of a single compute instance. This may indicate an attacker's attempt to maintain persistence on the cloud instance.

    Activation:
    14 Days
    Training:
    30 Days
    Test:
    N/A (single event)
    Deduplication:
    5 Days
    ATT&CK tactics: Persistence (TA0003) Lateral Movement (TA0008)
    ATT&CK techniques: Account Manipulation: SSH Authorized Keys (T1098.004) Remote Services: Cloud Services (T1021.007) Remote Services: Direct Cloud VM Connections (T1021.008)
    Required data: AWS Audit Log Azure Audit Log Gcp Audit Log
    Detector tags: Cloud Lateral Movement Analytics
    Attacker's goals: Maintain persistence on a compromised compute instance. Escalate local privileges to gain root on compute instance.
    Investigative actions: Investigate if SSH keys were modified or added at the instance or project level. Investigate which permissions were obtained as a result of the SSH keys modification.

    Variations

    Suspicious cloud compute instance SSH keys modification attempt by an identity with high administrative activity

    Informational overridden

    An identity attempted to modify the SSH keys of a single compute instance. The identity has high administrative activity This may indicate an attacker's attempt to maintain persistence on the cloud instance. overridden

    Instance SSH keys were modified for the first time in the cloud provider

    High overridden

    An identity has modified the SSH keys of an instance for the first time in the cloud provider. This may indicate an attacker's attempt to maintain persistence on the cloud instance. overridden

    Suspicious cloud compute instance SSH keys modification by a service account

    Medium overridden

    A service account has modified the SSH keys of a single compute instance. This may indicate an attacker's attempt to maintain persistence on the cloud instance. overridden

    Suspicious cloud compute instance SSH keys modification

    Informational overridden

    An identity has modified the SSH keys of a single compute instance. This may indicate an attacker's attempt to maintain persistence on the cloud instance. overridden

    Suspicious GCP project level metadata modification by a service account

    Low overridden

    A service account has modified the metadata of the entire instances in the project. This may indicate an attacker's attempt to perform lateral movement within the project. overridden

    Suspicious GCP project level metadata modification

    Informational overridden

    An identity account has modified the metadata of the entire instances in the project. This may indicate an attacker's attempt to perform lateral movement within the project. overridden

    Suspicious GCP project level metadata modification attempt

    Informational overridden

    An identity account has modified the metadata of the entire instances in the project. This may indicate an attacker's attempt to perform lateral movement within the project. overridden