Unusual File Download From File Sharing Websites

calendar Feb 12, 2024 · attack.defense_evasion attack.s0139 attack.t1564.004  ·
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Detects the download of suspicious file type from a well-known file and paste sharing domain

Sigma rule (View on GitHub)

 1title: Unusual File Download From File Sharing Websites
 2id: ae02ed70-11aa-4a22-b397-c0d0e8f6ea99
 3related:
 4    - id: 52182dfb-afb7-41db-b4bc-5336cb29b464
 5      type: similar
 6status: experimental
 7description: Detects the download of suspicious file type from a well-known file and paste sharing domain
 8references:
 9    - https://www.ultimatewindowssecurity.com/securitylog/encyclopedia/event.aspx?eventid=90015
10    - https://www.cisa.gov/uscert/ncas/alerts/aa22-321a
11    - https://www.microsoft.com/en-us/security/blog/2024/01/17/new-ttps-observed-in-mint-sandstorm-campaign-targeting-high-profile-individuals-at-universities-and-research-orgs/
12author: Florian Roth (Nextron Systems)
13date: 2022/08/24
14modified: 2024/02/09
15tags:
16    - attack.defense_evasion
17    - attack.s0139
18    - attack.t1564.004
19logsource:
20    product: windows
21    category: create_stream_hash
22detection:
23    selection_domain:
24        Contents|contains:
25            - '.githubusercontent.com'       # Includes both gists and github repositories / Michael Haag (idea)
26            - 'anonfiles.com'
27            - 'cdn.discordapp.com'
28            - 'cdn.discordapp.com/attachments/'
29            - 'ddns.net'
30            - 'dl.dropboxusercontent.com'
31            - 'ghostbin.co'
32            - 'glitch.me'
33            - 'gofile.io'
34            - 'hastebin.com'
35            - 'mediafire.com'
36            - 'mega.nz'
37            - 'onrender.com'
38            - 'paste.ee'
39            - 'pastebin.com'
40            - 'pastebin.pl'
41            - 'pastetext.net'
42            - 'privatlab.com'
43            - 'privatlab.net'
44            - 'send.exploit.in'
45            - 'sendspace.com'
46            - 'storage.googleapis.com'
47            - 'storjshare.io'
48            - 'supabase.co'
49            - 'temp.sh'
50            - 'transfer.sh'
51            - 'ufile.io'
52    selection_extension:
53        TargetFilename|contains:
54            - '.ps1:Zone'
55            - '.bat:Zone'
56            - '.cmd:Zone'
57    condition: all of selection*
58fields:
59    - TargetFilename
60    - Image
61falsepositives:
62    - Unknown
63level: medium

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