Malicious DLL File Dropped in the Teams or OneDrive Folder

SIGMA detection rule by frack113 · NOASSERTION

Detects creation of a malicious DLL file in the location where the OneDrive or Team applications Upon execution of the Teams or OneDrive application, the dropped malicious DLL file ("iphlpapi.dll") is sideloaded

title: Malicious DLL File Dropped in the Teams or OneDrive Folder
id: 1908fcc1-1b92-4272-8214-0fbaf2fa5163
status: test
description: |
    Detects creation of a malicious DLL file in the location where the OneDrive or Team applications
    Upon execution of the Teams or OneDrive application, the dropped malicious DLL file ("iphlpapi.dll") is sideloaded
references:
    - https://blog.cyble.com/2022/07/27/targeted-attacks-being-carried-out-via-dll-sideloading/
author: frack113
date: 2022-08-12
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: file_event
    product: windows
detection:
    selection:
        TargetFilename|contains|all:
            - 'iphlpapi.dll'
            - '\AppData\Local\Microsoft'
    condition: selection
falsepositives:
    - Unknown
level: high

[[ currentRule.title && currentRule.title.length > 60 ? currentRule.title.slice(0, 60) + '…' : currentRule.title ]]

477a7cc0-e144-4348-9fe9-34773aef426b

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Executable code, not a declarative rule

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