frack113
33 lines
1.2 KiB
YAML
Executable File
33 lines
1.2 KiB
YAML
Executable File
title: Malware Shellcode in Verclsid Target Process
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id: b7967e22-3d7e-409b-9ed5-cdae3f9243a1
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status: test
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description: Detects a process access to verclsid.exe that injects shellcode from a Microsoft Office application / VBA macro
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author: John Lambert (tech), Florian Roth (rule)
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references:
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- https://twitter.com/JohnLaTwC/status/837743453039534080
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date: 2017/03/04
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modified: 2021/11/27
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logsource:
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category: process_access
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product: windows
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definition: 'Use the following config to generate the necessary Event ID 10 Process Access events: <ProcessAccess onmatch="include"><CallTrace condition="contains">VBE7.DLL</CallTrace></ProcessAccess><ProcessAccess onmatch="exclude"><CallTrace condition="excludes">UNKNOWN</CallTrace></ProcessAccess>'
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detection:
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selection:
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TargetImage|endswith: '\verclsid.exe'
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GrantedAccess: '0x1FFFFF'
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combination1:
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CallTrace|contains|all:
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- '|UNKNOWN('
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- 'VBE7.DLL'
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combination2:
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SourceImage|contains: '\Microsoft Office\'
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CallTrace|contains: '|UNKNOWN'
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condition: selection and 1 of combination*
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falsepositives:
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- unknown
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level: high
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tags:
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- attack.defense_evasion
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- attack.privilege_escalation
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- attack.t1055
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