sigmahighHunting

Suspicious File Execution From Internet Hosted WebDav Share

Detects the execution of the "net use" command to mount a WebDAV server and then immediately execute some content in it. As seen being used in malicious LNK files

MITRE ATT&CK

T1059.001

execution

Detection Query

selection_img:
  - Image|contains: \cmd.exe
  - OriginalFileName: Cmd.EXE
selection_base:
  CommandLine|contains|all:
    - " net use http"
    - "& start /b "
    - \DavWWWRoot\
selection_ext:
  CommandLine|contains:
    - ".exe "
    - ".dll "
    - ".bat "
    - ".vbs "
    - ".ps1 "
condition: all of selection_*

Author

pH-T (Nextron Systems)

Created

2022-09-01

Data Sources

windowsProcess Creation Events

Platforms

windows

References

Tags

attack.executionattack.t1059.001

Raw Content

title: Suspicious File Execution From Internet Hosted WebDav Share
id: f0507c0f-a3a2-40f5-acc6-7f543c334993
status: test
description: Detects the execution of the "net use" command to mount a WebDAV server and then immediately execute some content in it. As seen being used in malicious LNK files
references:
    - https://twitter.com/ShadowChasing1/status/1552595370961944576
    - https://www.virustotal.com/gui/file/a63376ee1dba76361df73338928e528ca5b20171ea74c24581605366dcaa0104/behavior
author: pH-T (Nextron Systems)
date: 2022-09-01
modified: 2023-02-21
tags:
    - attack.execution
    - attack.t1059.001
logsource:
    category: process_creation
    product: windows
detection:
    selection_img:
        - Image|contains: '\cmd.exe'
        - OriginalFileName: 'Cmd.EXE'
    selection_base:
        CommandLine|contains|all:
            - ' net use http'
            - '& start /b '
            - '\DavWWWRoot\'
    selection_ext:
        CommandLine|contains:
            - '.exe '
            - '.dll '
            - '.bat '
            - '.vbs '
            - '.ps1 '
    condition: all of selection_*
falsepositives:
    - Unknown
level: high