1type: trigger
2name: sigmahq/proc_creation_win_regsvr32_http_ip_pattern
3description: |
4  Detects regsvr32 execution to download and install DLLs located remotely where the address is an IP address.
5filter: |
6  (evt.Meta.service == 'sysmon' && evt.Parsed.EventID == '1') && ((evt.Parsed.Image endsWith '\\regsvr32.exe' || evt.Parsed.OriginalFileName == 'REGSVR32.EXE') && (evt.Parsed.CommandLine contains ' /i:http://1' || evt.Parsed.CommandLine contains ' /i:http://2' || evt.Parsed.CommandLine contains ' /i:http://3' || evt.Parsed.CommandLine contains ' /i:http://4' || evt.Parsed.CommandLine contains ' /i:http://5' || evt.Parsed.CommandLine contains ' /i:http://6' || evt.Parsed.CommandLine contains ' /i:http://7' || evt.Parsed.CommandLine contains ' /i:http://8' || evt.Parsed.CommandLine contains ' /i:http://9' || evt.Parsed.CommandLine contains ' /i:https://1' || evt.Parsed.CommandLine contains ' /i:https://2' || evt.Parsed.CommandLine contains ' /i:https://3' || evt.Parsed.CommandLine contains ' /i:https://4' || evt.Parsed.CommandLine contains ' /i:https://5' || evt.Parsed.CommandLine contains ' /i:https://6' || evt.Parsed.CommandLine contains ' /i:https://7' || evt.Parsed.CommandLine contains ' /i:https://8' || evt.Parsed.CommandLine contains ' /i:https://9' || evt.Parsed.CommandLine contains ' -i:http://1' || evt.Parsed.CommandLine contains ' -i:http://2' || evt.Parsed.CommandLine contains ' -i:http://3' || evt.Parsed.CommandLine contains ' -i:http://4' || evt.Parsed.CommandLine contains ' -i:http://5' || evt.Parsed.CommandLine contains ' -i:http://6' || evt.Parsed.CommandLine contains ' -i:http://7' || evt.Parsed.CommandLine contains ' -i:http://8' || evt.Parsed.CommandLine contains ' -i:http://9' || evt.Parsed.CommandLine contains ' -i:https://1' || evt.Parsed.CommandLine contains ' -i:https://2' || evt.Parsed.CommandLine contains ' -i:https://3' || evt.Parsed.CommandLine contains ' -i:https://4' || evt.Parsed.CommandLine contains ' -i:https://5' || evt.Parsed.CommandLine contains ' -i:https://6' || evt.Parsed.CommandLine contains ' -i:https://7' || evt.Parsed.CommandLine contains ' -i:https://8' || evt.Parsed.CommandLine contains ' -i:https://9'))
7blackhole: 2m
8#status: test
9labels:
10  service: windows
11  confidence: 1
12  spoofable: 0
13  classification:
14   - attack.t1218.010
15
16  label: "Potentially Suspicious Regsvr32 HTTP IP Pattern"
17  behavior : "windows:audit"
18  remediation: false
19
20scope:
21  type: ParentProcessId
22  expression: evt.Parsed.ParentProcessId
23
24