Emerging Threatcriticalstable

Potential Dridex Activity

Detects potential Dridex acitvity via specific process patterns

Convert In Phoenix Studio

Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Florian Roth (Nextron Systems), oscd.community, Nasreddine Bencherchali (Nextron Systems)Created Thu Jan 10Updated Fri Feb 03e6eb5a96-9e6f-4a18-9cdd-642cfda21c8e2019

Emerging Threat

Active Threat

Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.

Log Source

WindowsProcess Creation

ProductWindows← raw: windows

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection_svchost:
        Image|endswith: '\svchost.exe'
        CommandLine|contains|all:
            - 'C:\Users\'
            - '\Desktop\'
    filter_svchost:
        ParentImage|startswith: 'C:\Windows\System32\'
    selection_regsvr:
        ParentImage|endswith: '\excel.exe'
        Image|endswith: '\regsvr32.exe'
        CommandLine|contains:
            - ' -s '
            - '\AppData\Local\Temp\'
    filter_regsvr:
        CommandLine|contains: '.dll'
    selection_anomaly_parent:
        ParentImage|endswith: '\svchost.exe'
    selection_anomaly_child_1:
        Image|endswith: '\whoami.exe'
        CommandLine|contains: ' /all'
    selection_anomaly_child_2:
        Image|endswith:
            - '\net.exe'
            - '\net1.exe'
        CommandLine|contains: ' view'
    condition: (selection_svchost and not filter_svchost) or (selection_regsvr and not filter_regsvr) or (selection_anomaly_parent and 1 of selection_anomaly_child_*)