Sigma rule: Potentially Suspicious File Download From ZIP TLD

A detection rule from the SigmaHQ repository, shown as its author published it. Dataset version ref-6387d3dc9751, updated 2023-05-18T00:00:00.000Z.

Rule

Title
Potentially Suspicious File Download From ZIP TLD
Status
test
Level
high
Author
Florian Roth (Nextron Systems)
Date
2023-05-18
File
rules/windows/create_stream_hash/create_stream_hash_zip_tld_download.yml
Commit
ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects the download of a file with a potentially suspicious extension from a .zip top level domain.

Log source

product
windows
category
create_stream_hash

Detection

selection:
    Contents|contains: '.zip/'
    TargetFilename|contains:
        - '.bat:Zone'
        - '.dat:Zone'
        - '.dll:Zone'
        - '.doc:Zone'
        - '.docm:Zone'
        - '.exe:Zone'
        - '.hta:Zone'
        - '.pptm:Zone'
        - '.ps1:Zone'
        - '.rar:Zone'
        - '.rtf:Zone'
        - '.sct:Zone'
        - '.vbe:Zone'
        - '.vbs:Zone'
        - '.ws:Zone'
        - '.wsf:Zone'
        - '.xll:Zone'
        - '.xls:Zone'
        - '.xlsm:Zone'
        - '.zip:Zone'
condition: selection

False positives (as the rule lists them)

  • Legitimate file downloads from a websites and web services that uses the ".zip" top level domain.

Tags

  • attack.stealth

References

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

Sources and licences

  • SigmaHQ

    "Potentially Suspicious File Download From ZIP TLD" by Florian Roth (Nextron Systems) (SigmaHQ). Rule: https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/create_stream_hash/create_stream_hash_zip_tld_download.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: Potentially Suspicious File Download From ZIP TLD",
entity page, dataset version ref-6387d3dc9751, updated 2023-05-18T00:00:00.000Z,
https://ransomware-tracker.com/detections/sigma/0bb4bbeb-fe52-4044-b40c-430a04577ebe (accessed 2026-11-03).
Underlying source: SigmaHQ rule 0bb4bbeb-fe52-4044-b40c-430a04577ebe, 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.