120 lines
3.8 KiB
YAML
120 lines
3.8 KiB
YAML
title: Renamed Binary
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author: Matthew Green - @mgreen27, Ecco, James Pemberton / @4A616D6573, oscd.community
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(improvements), Andreas Hunkeler (@Karneades)
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date: 2019/06/15
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description: Detects the execution of a renamed binary often used by attackers or
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malware leveraging new Sysmon OriginalFileName datapoint.
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_10:
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OriginalFileName: regsvr32.exe
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SELECTION_11:
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OriginalFileName: wmic.exe
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SELECTION_12:
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OriginalFileName: certutil.exe
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SELECTION_13:
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OriginalFileName: rundll32.exe
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SELECTION_14:
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OriginalFileName: cmstp.exe
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SELECTION_15:
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OriginalFileName: msiexec.exe
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SELECTION_16:
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OriginalFileName: 7z.exe
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SELECTION_17:
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OriginalFileName: winrar.exe
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SELECTION_18:
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OriginalFileName: wevtutil.exe
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SELECTION_19:
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OriginalFileName: net.exe
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SELECTION_2:
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OriginalFileName: cmd.exe
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SELECTION_20:
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OriginalFileName: net1.exe
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SELECTION_21:
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OriginalFileName: netsh.exe
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SELECTION_22:
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Image: '*\cmd.exe'
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SELECTION_23:
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Image: '*\powershell.exe'
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SELECTION_24:
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Image: '*\powershell_ise.exe'
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SELECTION_25:
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Image: '*\psexec.exe'
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SELECTION_26:
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Image: '*\psexec64.exe'
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SELECTION_27:
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Image: '*\cscript.exe'
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SELECTION_28:
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Image: '*\wscript.exe'
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SELECTION_29:
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Image: '*\mshta.exe'
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SELECTION_3:
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OriginalFileName: powershell.exe
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SELECTION_30:
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Image: '*\regsvr32.exe'
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SELECTION_31:
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Image: '*\wmic.exe'
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SELECTION_32:
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Image: '*\certutil.exe'
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SELECTION_33:
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Image: '*\rundll32.exe'
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SELECTION_34:
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Image: '*\cmstp.exe'
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SELECTION_35:
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Image: '*\msiexec.exe'
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SELECTION_36:
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Image: '*\7z.exe'
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SELECTION_37:
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Image: '*\winrar.exe'
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SELECTION_38:
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Image: '*\wevtutil.exe'
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SELECTION_39:
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Image: '*\net.exe'
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SELECTION_4:
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OriginalFileName: powershell_ise.exe
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SELECTION_40:
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Image: '*\net1.exe'
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SELECTION_41:
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Image: '*\netsh.exe'
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SELECTION_5:
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OriginalFileName: psexec.exe
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SELECTION_6:
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OriginalFileName: psexec.c
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SELECTION_7:
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OriginalFileName: cscript.exe
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SELECTION_8:
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OriginalFileName: wscript.exe
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SELECTION_9:
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OriginalFileName: mshta.exe
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condition: (SELECTION_1 and (SELECTION_2 or SELECTION_3 or SELECTION_4 or SELECTION_5
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or SELECTION_6 or SELECTION_7 or SELECTION_8 or SELECTION_9 or SELECTION_10
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or SELECTION_11 or SELECTION_12 or SELECTION_13 or SELECTION_14 or SELECTION_15
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or SELECTION_16 or SELECTION_17 or SELECTION_18 or SELECTION_19 or SELECTION_20
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or SELECTION_21) and not ((SELECTION_22 or SELECTION_23 or SELECTION_24 or
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SELECTION_25 or SELECTION_26 or SELECTION_27 or SELECTION_28 or SELECTION_29
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or SELECTION_30 or SELECTION_31 or SELECTION_32 or SELECTION_33 or SELECTION_34
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or SELECTION_35 or SELECTION_36 or SELECTION_37 or SELECTION_38 or SELECTION_39
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or SELECTION_40 or SELECTION_41)))
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falsepositives:
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- Custom applications use renamed binaries adding slight change to binary name. Typically
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this is easy to spot and add to whitelist
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id: 36480ae1-a1cb-4eaa-a0d6-29801d7e9142
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level: medium
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logsource:
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category: process_creation
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product: windows
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modified: 2020/09/06
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references:
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- https://attack.mitre.org/techniques/T1036/
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- https://mgreen27.github.io/posts/2019/05/12/BinaryRename.html
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- https://mgreen27.github.io/posts/2019/05/29/BinaryRename2.html
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1036
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- attack.t1036.003
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yml_filename: win_renamed_binary.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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