56 lines
1.4 KiB
YAML
56 lines
1.4 KiB
YAML
title: HTML Help Shell Spawn
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author: Maxim Pavlunin
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date: 2020/04/01
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description: Detects a suspicious child process of a Microsoft HTML Help system when
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executing compiled HTML files (.chm)
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_2:
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ParentImage: C:\Windows\hh.exe
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SELECTION_3:
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Image: '*\cmd.exe'
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SELECTION_4:
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Image: '*\powershell.exe'
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SELECTION_5:
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Image: '*\wscript.exe'
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SELECTION_6:
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Image: '*\cscript.exe'
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SELECTION_7:
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Image: '*\regsvr32.exe'
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SELECTION_8:
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Image: '*\wmic.exe'
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SELECTION_9:
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Image: '*\rundll32.exe'
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condition: (SELECTION_1 and SELECTION_2 and (SELECTION_3 or SELECTION_4 or SELECTION_5
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or SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9))
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falsepositives:
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- unknown
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fields:
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- CommandLine
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- ParentCommandLine
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id: 52cad028-0ff0-4854-8f67-d25dfcbc78b4
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level: high
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logsource:
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category: process_creation
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product: windows
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modified: 2020/09/01
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references:
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- https://www.trustwave.com/en-us/resources/blogs/spiderlabs-blog/chm-badness-delivers-a-banking-trojan/
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1218.001
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- attack.t1218.010
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- attack.t1218.011
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- attack.execution
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- attack.t1223
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- attack.t1059.001
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- attack.t1059.003
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- attack.t1059.005
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- attack.t1059.007
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- attack.t1047
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yml_filename: win_html_help_spawn.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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