1type: trigger
2name: sigmahq/proc_creation_win_curl_download_direct_ip_susp_extensions
3description: |
4  Detects potentially suspicious file downloads directly from IP addresses using curl.exe
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\curl.exe' || evt.Parsed.OriginalFileName == 'curl.exe') && evt.Parsed.CommandLine matches '://[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1,3}' && evt.Parsed.CommandLine contains 'http' && (evt.Parsed.CommandLine contains ' -O' || evt.Parsed.CommandLine contains '--remote-name' || evt.Parsed.CommandLine contains '--output') && (evt.Parsed.CommandLine endsWith '.bat' || evt.Parsed.CommandLine endsWith '.bat"' || evt.Parsed.CommandLine endsWith '.dat' || evt.Parsed.CommandLine endsWith '.dat"' || evt.Parsed.CommandLine endsWith '.dll' || evt.Parsed.CommandLine endsWith '.dll"' || evt.Parsed.CommandLine endsWith '.exe' || evt.Parsed.CommandLine endsWith '.exe"' || evt.Parsed.CommandLine endsWith '.gif' || evt.Parsed.CommandLine endsWith '.gif"' || evt.Parsed.CommandLine endsWith '.hta' || evt.Parsed.CommandLine endsWith '.hta"' || evt.Parsed.CommandLine endsWith '.jpeg' || evt.Parsed.CommandLine endsWith '.jpeg"' || evt.Parsed.CommandLine endsWith '.log' || evt.Parsed.CommandLine endsWith '.log"' || evt.Parsed.CommandLine endsWith '.msi' || evt.Parsed.CommandLine endsWith '.msi"' || evt.Parsed.CommandLine endsWith '.png' || evt.Parsed.CommandLine endsWith '.png"' || evt.Parsed.CommandLine endsWith '.ps1' || evt.Parsed.CommandLine endsWith '.ps1"' || evt.Parsed.CommandLine endsWith '.psm1' || evt.Parsed.CommandLine endsWith '.psm1"' || evt.Parsed.CommandLine endsWith '.vbe' || evt.Parsed.CommandLine endsWith '.vbe"' || evt.Parsed.CommandLine endsWith '.vbs' || evt.Parsed.CommandLine endsWith '.vbs"' || evt.Parsed.CommandLine endsWith '.bat\'' || evt.Parsed.CommandLine endsWith '.dat\'' || evt.Parsed.CommandLine endsWith '.dll\'' || evt.Parsed.CommandLine endsWith '.exe\'' || evt.Parsed.CommandLine endsWith '.gif\'' || evt.Parsed.CommandLine endsWith '.hta\'' || evt.Parsed.CommandLine endsWith '.jpeg\'' || evt.Parsed.CommandLine endsWith '.log\'' || evt.Parsed.CommandLine endsWith '.msi\'' || evt.Parsed.CommandLine endsWith '.png\'' || evt.Parsed.CommandLine endsWith '.ps1\'' || evt.Parsed.CommandLine endsWith '.psm1\'' || evt.Parsed.CommandLine endsWith '.vbe\'' || evt.Parsed.CommandLine endsWith '.vbs\''))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14
15  label: "Suspicious File Download From IP Via Curl.EXE"
16  behavior : "windows:audit"
17  remediation: false
18
19scope:
20  type: ParentProcessId
21  expression: evt.Parsed.ParentProcessId
22
23