Nasreddine Bencherchali
42b99b165d
Co-authored-by: phantinuss <79651203+phantinuss@users.noreply.github.com>
39 lines
1.3 KiB
YAML
39 lines
1.3 KiB
YAML
title: Wlrmdr Lolbin Use as Launcher
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id: 9cfc00b6-bfb7-49ce-9781-ef78503154bb
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status: experimental
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description: Detects use of Wlrmdr.exe in which the -u parameter is passed to ShellExecute
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references:
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- https://twitter.com/0gtweet/status/1493963591745220608?s=20&t=xUg9DsZhJy1q9bPTUWgeIQ
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author: frack113, manasmbellani
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date: 2022/02/16
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modified: 2022/12/06
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tags:
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- attack.defense_evasion
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- attack.t1218
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logsource:
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category: process_creation
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product: windows
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detection:
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selection_child_img:
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- Image|endswith: '\wlrmdr.exe'
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- OriginalFileName: 'WLRMNDR.EXE'
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selection_child_cli:
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CommandLine|contains|all:
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# Note that the dash "-" can be replaced with a slash "/" (TODO: Use the "windash" modifier when it's introduced)
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- '-s '
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- '-f '
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- '-t '
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- '-m '
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- '-a '
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- '-u '
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selection_parent: # This selection is looking for processes spawned from wlrmdr using the "-u" flag
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ParentImage|endswith: '\wlrmdr.exe'
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filter:
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ParentImage: 'C:\Windows\System32\winlogon.exe'
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filter_null:
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ParentImage: '-'
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condition: selection_parent or (all of selection_child_* and not 1 of filter*)
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falsepositives:
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- Unknown
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level: medium
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