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a0486edeea
+ Updated HELK field-index mapping file + After going through all the fields with 'fieldlist' output, I found a few rules that fixed.
45 lines
1.1 KiB
YAML
45 lines
1.1 KiB
YAML
action: global
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title: PowerShell Base64 Encoded Shellcode
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description: Detects Base64 encoded Shellcode
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status: experimental
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references:
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- https://twitter.com/cyb3rops/status/1063072865992523776
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author: Florian Roth
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date: 2018/11/17
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tags:
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- attack.defense_evasion
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- attack.t1036
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detection:
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condition: selection1 and selection2
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falsepositives:
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- Unknown
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level: critical
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---
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# Windows Audit Log
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logsource:
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product: windows
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service: security
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description: 'Requirements: Audit Policy : Detailed Tracking > Audit Process creation, Group Policy : Administrative Templates\System\Audit Process Creation'
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detection:
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selection1:
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EventID: 4688
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ProcessCommandLine: '*AAAAYInlM*'
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selection2:
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ProcessCommandLine:
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- '*OiCAAAAYInlM*'
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- '*OiJAAAAYInlM*'
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---
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# Sysmon
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logsource:
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product: windows
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service: sysmon
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detection:
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selection1:
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EventID: 1
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CommandLine: '*AAAAYInlM*'
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selection2:
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CommandLine:
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- '*OiCAAAAYInlM*'
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- '*OiJAAAAYInlM*'
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