Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    20-06-2024 06:12

General

  • Target

    Assist/$R0.dll

  • Size

    156KB

  • MD5

    aaf5a6b61ca11868c31011a68d95a5ef

  • SHA1

    d58bb83332af9e56758ff5cb1fcd3173567e6c4c

  • SHA256

    a8cd1c0f58135ad104b0d2a3064d3d4b9792be5ff40a721aac7eb37e26708b36

  • SHA512

    e6461950958a38089197932f6ba34b578a6d6932e1cf7412a2c93f5841e853468037c0cd2081d3ef5f744ab04df7b8b967113aa255066a1f22ae980dc6ceca3b

  • SSDEEP

    3072:rLUxXZ6+a0acTJyxc+avp3U0S96yM33fJgqVfuO8LLx14:cxZ6/cNSKd7r33VfVA

Score
6/10

Malware Config

Signatures

  • Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

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

  • Modifies Internet Explorer settings 1 TTPs 6 IoCs
  • Modifies registry class 46 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\Assist\$R0.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2068
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\Users\Admin\AppData\Local\Temp\Assist\$R0.dll
      2⤵
      • Installs/modifies Browser Helper Object
      • Modifies Internet Explorer settings
      • Modifies registry class
      PID:2012

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Assist\Coolbar\custom.bmp

    Filesize

    540B

    MD5

    5574db264ea5ce3078abb52030ffebff

    SHA1

    efcaeb05e5e40f24b12c346ef1ec14268465ef9d

    SHA256

    5ab9d0bfbf2b8141ab316f1f4697e38e20b2b5da912df5b6e1e2f03d4b30e6ee

    SHA512

    986cc36d7f1e8f40748002e0d31b1d4e743df3b21cca018cecc9917c3d85ab4fc64f2da4c47b135d61be5d28733c1eb841bc89c7d20d8fbc118a78411c27e559