Analysis

  • max time kernel
    138s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-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 3 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\Assist\$R0.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4480
    • 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:1828

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\Assist\3721\Coolbar\1.bmp

    Filesize

    604B

    MD5

    797a7955e4869d421f672cd2e5fb6bde

    SHA1

    4120908d501ad837286cafedc8cd8096dc2b6364

    SHA256

    f251946827b8ed34e1cf1909b1a0a68ab8a6a378a2043753c93b9156a781908e

    SHA512

    5aaaa681d6bf2aa88224c4884c739a325ba6d5d4cc2e668fe85910c5db1ab58bafceafc8478c050084c90a5c7d3a58e81939c1bb3aa18ffd4512a0ff3cb84002