87 lines
2.6 KiB
YAML
87 lines
2.6 KiB
YAML
title: Suspicious PowerShell Cmdline
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author: Teymur Kheirkhabarov (idea), Vasiliy Burov (rule), oscd.community
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date: 2020/10/11
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description: Detects the PowerShell command lines with reversed strings
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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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CommandLine: '*golon*'
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SELECTION_11:
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CommandLine: '*tninon*'
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SELECTION_12:
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CommandLine: '*eddih*'
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SELECTION_13:
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CommandLine: '*tpircS*'
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SELECTION_14:
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CommandLine: '*ssecorp*'
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SELECTION_15:
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CommandLine: '*llehsrewop*'
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SELECTION_16:
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CommandLine: '*esnopser*'
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SELECTION_17:
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CommandLine: '*daolnwod*'
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SELECTION_18:
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CommandLine: '*tneilCbeW*'
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SELECTION_19:
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CommandLine: '*tneilc*'
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SELECTION_2:
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Image: '*\powershell.exe'
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SELECTION_20:
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CommandLine: '*ptth*'
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SELECTION_21:
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CommandLine: '*elifotevas*'
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SELECTION_22:
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CommandLine: '*46esab*'
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SELECTION_23:
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CommandLine: '*htaPpmeTteG*'
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SELECTION_24:
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CommandLine: '*tcejbO*'
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SELECTION_25:
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CommandLine: '*maerts*'
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SELECTION_26:
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CommandLine: '*hcaerof*'
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SELECTION_27:
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CommandLine: '*ekovni*'
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SELECTION_28:
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CommandLine: '*retupmoc*'
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SELECTION_3:
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CommandLine: '*hctac*'
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SELECTION_4:
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CommandLine: '*kearb*'
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SELECTION_5:
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CommandLine: '*dnammoc*'
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SELECTION_6:
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CommandLine: '*ekovn*'
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SELECTION_7:
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CommandLine: '*eliFd*'
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SELECTION_8:
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CommandLine: '*rahc*'
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SELECTION_9:
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CommandLine: '*etirw*'
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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 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 or SELECTION_22 or SELECTION_23 or SELECTION_24 or SELECTION_25
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or SELECTION_26 or SELECTION_27 or SELECTION_28))
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falsepositives:
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- Unlikely
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id: b6b49cd1-34d6-4ead-b1bf-176e9edba9a4
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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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references:
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- https://2019.offzone.moscow/ru/report/hunting-for-powershell-abuses/
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- https://speakerdeck.com/heirhabarov/hunting-for-powershell-abuse?slide=66
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status: experimental
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tags:
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- attack.defense_evasion
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- attack.t1027
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- attack.execution
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- attack.t1059.001
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yml_filename: win_powershell_cmdline_reversed_strings.yml
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yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation
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