Potential Libvlc.DLL Sideloading

calendar May 15, 2025 · attack.defense-evasion attack.persistence attack.privilege-escalation attack.t1574.001  ·
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Detects potential DLL sideloading of "libvlc.dll", a DLL that is legitimately used by "VLC.exe"

Sigma rule (View on GitHub)

 1title: Potential Libvlc.DLL Sideloading
 2id: bf9808c4-d24f-44a2-8398-b65227d406b6
 3status: test
 4description: Detects potential DLL sideloading of "libvlc.dll", a DLL that is legitimately used by "VLC.exe"
 5references:
 6    - https://www.trendmicro.com/en_us/research/23/c/earth-preta-updated-stealthy-strategies.html
 7    - https://hijacklibs.net/entries/3rd_party/vlc/libvlc.html
 8author: X__Junior
 9date: 2023-04-17
10tags:
11    - attack.defense-evasion
12    - attack.persistence
13    - attack.privilege-escalation
14    - attack.t1574.001
15logsource:
16    category: image_load
17    product: windows
18detection:
19    selection:
20        ImageLoaded|endswith: '\libvlc.dll'
21    filter_main_vlc:
22        ImageLoaded|startswith:
23            - 'C:\Program Files (x86)\VideoLAN\VLC\'
24            - 'C:\Program Files\VideoLAN\VLC\'
25    condition: selection and not 1 of filter_main_*
26falsepositives:
27    - False positives are expected if VLC is installed in non-default locations
28level: medium

References

  • Earth Preta Updated Stealthy Strategies

    After months of investigation, we found that several undisclosed malware and interesting tools used for exfiltration purposes were being used by Earth Preta. We also observed that the threat actors were actively changing their tools, tactics, and procedures (TTPs) to bypass security solutions. In this blog entry, we will introduce and analyze the other tools and malware used by the threat actor.


    Read More

  • libvlc.dll on HijackLibs

    Check out the entry for libvlc.dll on HijackLibs - it is loaded by applications vulnerable to DLL Hijacking!


    Read More

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