Suspicious 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: Suspicious File Download From File Sharing Websites
 2id: 52182dfb-afb7-41db-b4bc-5336cb29b464
 3related:
 4    - id: ae02ed70-11aa-4a22-b397-c0d0e8f6ea99
 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://fabian-voith.de/2020/06/25/sysmon-v11-1-reads-alternate-data-streams/
12    - 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/
13author: Florian Roth (Nextron Systems)
14date: 2022/08/24
15modified: 2024/02/09
16tags:
17    - attack.defense_evasion
18    - attack.s0139
19    - attack.t1564.004
20logsource:
21    product: windows
22    category: create_stream_hash
23detection:
24    selection_domain:
25        Contents|contains:
26            - '.githubusercontent.com'       # Includes both gists and github repositories / Michael Haag (idea)
27            - 'anonfiles.com'
28            - 'cdn.discordapp.com'
29            - 'cdn.discordapp.com/attachments/'
30            - 'ddns.net'
31            - 'dl.dropboxusercontent.com'
32            - 'ghostbin.co'
33            - 'glitch.me'
34            - 'gofile.io'
35            - 'hastebin.com'
36            - 'mediafire.com'
37            - 'mega.nz'
38            - 'onrender.com'
39            - 'paste.ee'
40            - 'pastebin.com'
41            - 'pastebin.pl'
42            - 'pastetext.net'
43            - 'privatlab.com'
44            - 'privatlab.net'
45            - 'send.exploit.in'
46            - 'sendspace.com'
47            - 'storage.googleapis.com'
48            - 'storjshare.io'
49            - 'supabase.co'
50            - 'temp.sh'
51            - 'transfer.sh'
52            - 'ufile.io'
53    selection_extension:
54        TargetFilename|contains:
55            - '.exe:Zone'
56            - '.vbs:Zone'
57            - '.vbe:Zone'
58            - '.dll:Zone'
59            - '.one:Zone'
60            - '.hta:Zone'
61            - '.lnk:Zone'
62            - '.xll:Zone'
63            - '.cpl:Zone'
64    condition: all of selection*
65falsepositives:
66    - Some false positives might occur with binaries download via Github
67level: high

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