Suspicious File Download From File Sharing Domain Via Curl.EXE

  1title: Suspicious File Download From File Sharing Domain Via Curl.EXE
  2id: 56454143-524f-49fb-b1c6-3fb8b1ad41fb
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 26status: test
 27description: Detects potentially suspicious file download from file sharing domains using curl.exe
 28references:
 29    - https://labs.withsecure.com/publications/fin7-target-veeam-servers
 30    - https://github.com/WithSecureLabs/iocs/blob/344203de742bb7e68bd56618f66d34be95a9f9fc/FIN7VEEAM/iocs.csv
 31author: Nasreddine Bencherchali (Nextron Systems)
 32date: 2023-05-05
 33modified: 2026-03-29
 34tags:
 35    - attack.execution
 36logsource:
 37    category: process_creation
 38    product: windows
 39detection:
 40    selection_img:
 41        - Image|endswith: '\curl.exe'
 42        - OriginalFileName: 'curl.exe'
 43    selection_websites:
 44        CommandLine|contains:
 45            - '.githubusercontent.com'       # Includes both gists and github repositories / Michael Haag (idea)
 46            - '0x0.st'
 47            - 'anonfiles.com'
 48            - 'bashupload.com'
 49            - 'cdn.discordapp.com'
 50            - 'chunk.io'
 51            - 'ddns.net'
 52            - 'dl.dropboxusercontent.com'
 53            - 'ghostbin.co'
 54            - 'github.com'
 55            - 'glitch.me'
 56            - 'gofile.io'
 57            - 'hastebin.com'
 58            - 'mediafire.com'
 59            - 'mega.nz'
 60            - 'onrender.com'
 61            - 'pages.dev'
 62            - 'paste.ee'
 63            - 'pastebin.com'
 64            - 'pastebin.pl'
 65            - 'pastetext.net'
 66            - 'pixeldrain.com'
 67            - 'privatlab.com'
 68            - 'privatlab.net'
 69            - 'send.exploit.in'
 70            - 'sendspace.com'
 71            - 'storage.googleapis.com'
 72            - 'storjshare.io'
 73            - 'supabase.co'
 74            - 'temp.sh'
 75            - 'transfer.sh'
 76            - 'trycloudflare.com'
 77            - 'ufile.io'
 78            - 'w3spaces.com'
 79            - 'workers.dev'
 80            - 'x0.at'
 81    selection_http:
 82        CommandLine|contains: 'http'
 83    selection_flag:
 84        CommandLine|contains:
 85            - ' -O'  # covers the alias for --remote-name and --output
 86            - '--remote-name'
 87            - '--output'
 88    selection_ext:
 89        CommandLine|endswith:
 90            - ".ps1"
 91            - ".ps1'"
 92            - '.ps1"'
 93            - ".dat"
 94            - ".dat'"
 95            - '.dat"'
 96            - ".msi"
 97            - ".msi'"
 98            - '.msi"'
 99            - ".bat"
100            - ".bat'"
101            - '.bat"'
102            - ".exe"
103            - ".exe'"
104            - '.exe"'
105            - ".vbs"
106            - ".vbs'"
107            - '.vbs"'
108            - ".vbe"
109            - ".vbe'"
110            - '.vbe"'
111            - ".hta"
112            - ".hta'"
113            - '.hta"'
114            - ".dll"
115            - ".dll'"
116            - '.dll"'
117            - ".psm1"
118            - ".psm1'"
119            - '.psm1"'
120    condition: all of selection_*
121falsepositives:
122    - Unknown
123level: high
124regression_tests_path: regression_data/rules/windows/process_creation/proc_creation_win_curl_download_susp_file_sharing_domains/info.yml