Sigma rule: Potential Dridex Activity

Rule

Title

Potential Dridex Activity

Status

stable

Level

critical

Author

Florian Roth (Nextron Systems), oscd.community, Nasreddine Bencherchali (Nextron Systems)

Date

2019-01-10

Modified

2023-02-03

File

rules-emerging-threats/2019/Malware/Dridex/proc_creation_win_malware_dridex.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects potential Dridex acitvity via specific process patterns

Log source

product

windows

category

process_creation

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_*)

False positives (as the rule lists them)

• Unlikely

Tags

• attack.privilege-escalation
• attack.stealth
• attack.t1055
• attack.discovery
• attack.t1135
• attack.t1033
• detection.emerging-threats

MITRE ATT&CK ids this rule names

• T1033
• T1055
• T1135

References

• https://app.any.run/tasks/993daa5e-112a-4ff6-8b5a-edbcec7c7ba3
• https://redcanary.com/threat-detection-report/threats/dridex/

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules-emerging-threats/2019/Malware/Dridex/proc_creation_win_malware_dridex.yml