Analysis

  • max time kernel
    120s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    08-11-2024 12:23

General

  • Target

    i386/CbFsMntNtf3.dll

  • Size

    151KB

  • MD5

    d48ecfbbcbfee2b91f369394759bcdb3

  • SHA1

    3b19a6eba987f850a09dd8d4b4e9a4f5a12b99a8

  • SHA256

    1cbfad3699e6b14a56d9c55caeb65253d440e426431278a0968cc0308a8d1d95

  • SHA512

    2840869544bc099ad7b7c327ba2f1bf4e4cea27414c43b19a425b9e2b2ec971a4d93ce79253dfe7ecc8a463fa45e1c50b24342bfefd3fcfb199f5d586604b73c

  • SSDEEP

    1536:W8B5kdgz33c6J9N2YXxn+42sgqf/jme/SSbaEEUkggEG34cvhWVPIWtZrm8gCy4F:W8gO3Tn2YXxNB7jorVQhIWtZrHgJ4W+

Malware Config

Signatures

  • Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 1 IoCs
  • Modifies Shared Task Scheduler registry keys 2 TTPs 2 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 62 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\i386\CbFsMntNtf3.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2568
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\Users\Admin\AppData\Local\Temp\i386\CbFsMntNtf3.dll
      2⤵
      • Adds autorun key to be loaded by Explorer.exe on startup
      • Modifies Shared Task Scheduler registry keys
      • Installs/modifies Browser Helper Object
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      PID:2376

Network

MITRE ATT&CK Enterprise v15

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Downloads