Sigma rule: Suspicious File Download From IP Via Wget.EXE

Rule

Title

Suspicious File Download From IP Via Wget.EXE

Status

test

Level

high

Author

Nasreddine Bencherchali (Nextron Systems)

Date

2023-07-27

File

rules/windows/process_creation/proc_creation_win_wget_download_direct_ip.yml

Commit

ccbb0369507f796db0b0ae6854c8a2be471b9d84

Detects potentially suspicious file downloads directly from IP addresses using Wget.exe

Log source

product

windows

category

process_creation

Detection

selection_img:
    - Image|endswith: '\wget.exe'
    - OriginalFileName: 'wget.exe'
selection_ip:
    CommandLine|re: '://[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
selection_http:
    CommandLine|contains: 'http'
selection_flag:
    - CommandLine|re: '\s-O\s'
    - CommandLine|contains: '--output-document'
selection_ext:
    CommandLine|endswith:
        # Note you can transform this into a "contains" to increase coverage but you would need to take care of some FP.
        - '.ps1'
        - ".ps1'"
        - '.ps1"'
        - '.dat'
        - ".dat'"
        - '.dat"'
        - '.msi'
        - ".msi'"
        - '.msi"'
        - '.bat'
        - ".bat'"
        - '.bat"'
        - '.exe'
        - ".exe'"
        - '.exe"'
        - '.vbs'
        - ".vbs'"
        - '.vbs"'
        - '.vbe'
        - ".vbe'"
        - '.vbe"'
        - '.hta'
        - ".hta'"
        - '.hta"'
        - '.dll'
        - ".dll'"
        - '.dll"'
        - '.psm1'
        - ".psm1'"
        - '.psm1"'
condition: all of selection_*

False positives (as the rule lists them)

• Unknown

Tags

• attack.execution

References

• https://www.gnu.org/software/wget/manual/wget.html

Read on 2026-11-03T00:58:21.399Z under licence sigma-drl-1.1@d5f4c36a from https://github.com/SigmaHQ/sigma/blob/ccbb0369507f796db0b0ae6854c8a2be471b9d84/rules/windows/process_creation/proc_creation_win_wget_download_direct_ip.yml