Sigma rule: Base64 Encoded Listing of Shadowcopy

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-d93b6680bdd6, updated 2023-01-30T00:00:00.000Z.

SigmaHQ marks this rule as deprecated.

Rule

Title
Base64 Encoded Listing of Shadowcopy
Status
deprecated
Level
high
Author
Christian Burkard (Nextron Systems)
Date
2022/03/01
Modified
2023/01/30
File
deprecated/windows/proc_creation_win_powershell_base64_listing_shadowcopy.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects base64 encoded listing Win32_Shadowcopy

Log source

product
windows
category
process_creation

Detection

selection:
    # Win32_Shadowcopy | ForEach-Object
    CommandLine|contains:
        - 'VwBpAG4AMwAyAF8AUwBoAGEAZABvAHcAYwBvAHAAeQAgAHwAIABGAG8AcgBFAGEAYwBoAC0ATwBiAGoAZQBjAHQA'
        - 'cAaQBuADMAMgBfAFMAaABhAGQAbwB3AGMAbwBwAHkAIAB8ACAARgBvAHIARQBhAGMAaAAtAE8AYgBqAGUAYwB0A'
        - 'XAGkAbgAzADIAXwBTAGgAYQBkAG8AdwBjAG8AcAB5ACAAfAAgAEYAbwByAEUAYQBjAGgALQBPAGIAagBlAGMAdA'
condition: selection

False positives (as the rule lists them)

  • Unlikely

Tags

  • attack.execution
  • attack.t1059.001
  • attack.defense_evasion
  • attack.t1027

MITRE ATT&CK ids this rule names

References

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/deprecated/windows/proc_creation_win_powershell_base64_listing_shadowcopy.yml

Sources and licences

  • SigmaHQ

    "Base64 Encoded Listing of Shadowcopy" by Christian Burkard (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/deprecated/windows/proc_creation_win_powershell_base64_listing_shadowcopy.yml.
    Licensed under the Detection Rule License (DRL) 1.1: https://github.com/SigmaHQ/Detection-Rule-License

    Detection Rule License (DRL) 1.1

Cite this page

Dragons Eye Ransomware Tracker, "Sigma rule: Base64 Encoded Listing of Shadowcopy",
entity page, dataset version ref-d93b6680bdd6, updated 2023-01-30T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/47688f1b-9f51-4656-b013-3cc49a166a36 (accessed 2026-11-03).
Underlying source: SigmaHQ rule 47688f1b-9f51-4656-b013-3cc49a166a36, commit ccbb0369507f796db0b0ae6854c8a2be471b9d84.

Pages change. The dataset version identifies the data, but no archive of old versions is kept, so this citation cannot be replayed later.