Analysis

  • max time kernel
    122s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    04/02/2024, 18:38

General

  • Target

    8fde3f8b6233ec067c2f19dfe7e947bb.exe

  • Size

    93KB

  • MD5

    8fde3f8b6233ec067c2f19dfe7e947bb

  • SHA1

    849cb9f4b8d3f2a6d302a8c75b46b586d9f4046d

  • SHA256

    134964a3a0ca44c9b9c371e76f266600924c82dd9ff7220052af2d6b3f98f59e

  • SHA512

    79d70be1aa7f4589a976745bea7b528d155b0e54c6361741d9f466c373458dd9579193cc89ddff19b0bce28b570773ee1b969ecbe906a31ae61b97446c75bf80

  • SSDEEP

    1536:DSj113BXyOuN8EYtpAloGKpabl2qL/D6SGcGr6zOhYiBP3HWM9VW0h1fRA0gqFl:DgtRHCoDpCkK6SfzOKiB7jW0h1RVFl

Malware Config

Signatures

  • Loads dropped DLL 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Installs/modifies Browser Helper Object 2 TTPs 1 IoCs

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

  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Modifies registry class 5 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8fde3f8b6233ec067c2f19dfe7e947bb.exe
    "C:\Users\Admin\AppData\Local\Temp\8fde3f8b6233ec067c2f19dfe7e947bb.exe"
    1⤵
    • Checks whether UAC is enabled
    • Drops file in System32 directory
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1476
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s C:\Windows\system32\drivera.dll
      2⤵
      • Loads dropped DLL
      • Installs/modifies Browser Helper Object
      • Modifies registry class
      PID:2996

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • \Windows\SysWOW64\drivera.dll

          Filesize

          146KB

          MD5

          fbd1a0dd96e559b6b3f4433d4c37d855

          SHA1

          536f861a349fbcd9a108e51d134398eb2059fc9f

          SHA256

          93d44443472184498349a735673b0d1564f2dbdade5b748078a7689e7007ce42

          SHA512

          22dd0a96f06a1524d576ca97d847ae7e6a4e2c6e877b587af9af8f6642466de5a8ed7c032b5759ae981f30df1522994232f754965c09c9f78ed378a6e677718c

        • memory/1476-0-0x0000000000400000-0x000000000044B000-memory.dmp

          Filesize

          300KB

        • memory/1476-1-0x00000000001B0000-0x00000000001B2000-memory.dmp

          Filesize

          8KB

        • memory/1476-9-0x0000000000400000-0x000000000044B000-memory.dmp

          Filesize

          300KB

        • memory/2996-8-0x0000000000470000-0x000000000049A000-memory.dmp

          Filesize

          168KB