Detectionmediumtest
Potentially Suspicious Regsvr32 HTTP/FTP Pattern
Detects regsvr32 execution to download/install/register new DLLs that are hosted on Web or FTP servers.
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Florian Roth (Nextron Systems)Created Wed May 24Updated Fri May 26867356ee-9352-41c9-a8f2-1be690d78216windows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic3 selectors
detection:
selection_img:
- Image|endswith: '\regsvr32.exe'
- OriginalFileName: 'REGSVR32.EXE'
selection_flag:
CommandLine|contains:
- ' /i'
- ' -i'
selection_protocol:
CommandLine|contains:
- 'ftp'
- 'http'
condition: all of selection_*False Positives
Unknown
False positive likelihood has not been assessed. Additional context may be needed during triage.
MITRE ATT&CK
Tactics
Sub-techniques
Related Rules
Similar
Rule not found8e2b24c9-4add-46a0-b4bb-0057b4e6187d
Rule Metadata
Rule ID
867356ee-9352-41c9-a8f2-1be690d78216
Status
test
Level
medium
Type
Detection
Created
Wed May 24
Modified
Fri May 26
Path
rules/windows/process_creation/proc_creation_win_regsvr32_network_pattern.yml
Raw Tags
attack.defense-evasionattack.t1218.010