Analysis

  • max time kernel
    118s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    31-12-2023 13:29

General

  • Target

    380b05c750732bd4c0887d90c684b5de.exe

  • Size

    45KB

  • MD5

    380b05c750732bd4c0887d90c684b5de

  • SHA1

    1be814a2f68acf74e6d716e2b4a87be870ee1e5e

  • SHA256

    3d55b037cd4d9041de0e54b74c146c698d185c124fad6a889309ce0878ddfc1d

  • SHA512

    b2a6a1252a52a0992d67a8b34e267196507ff0c78599cf6bfc759fb187f4e510eb17b098c92da22d4760f6e9814008702c54ddb255da0779fd0aafd3fd49b0bb

  • SSDEEP

    768:gdcI0SjL+ejzE7z/hcwFlrGGIaxuNplzTNCjKY50x:jSjLzE/fFlqNplzTNcjY

Malware Config

Signatures

  • Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs
  • Modifies Installed Components in the registry 2 TTPs 6 IoCs
  • ACProtect 1.3x - 1.4x DLL software 1 IoCs

    Detects file using ACProtect software.

  • Deletes itself 1 IoCs
  • Loads dropped DLL 1 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

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

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

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

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies registry class 14 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\380b05c750732bd4c0887d90c684b5de.exe
    "C:\Users\Admin\AppData\Local\Temp\380b05c750732bd4c0887d90c684b5de.exe"
    1⤵
    • Adds autorun key to be loaded by Explorer.exe on startup
    • Modifies Installed Components in the registry
    • Installs/modifies Browser Helper Object
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2900
    • C:\Windows\SysWOW64\regsvr32.exe
      "C:\Windows\System32\regsvr32.exe" /s sxmg4.dll
      2⤵
      • Loads dropped DLL
      PID:2848
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\380B05~1.EXE >> NUL
      2⤵
      • Deletes itself
      PID:1200

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\sxmg4.dll

    Filesize

    33KB

    MD5

    4bfbf5537b57a1258aabfb4e1bd3b01c

    SHA1

    f2cd1422a3c11d640b6947ae6ae6e83419acfae8

    SHA256

    19a2d37047036a4b1414d29c6055a9ab33fc8ca6033e64213191fbcd8d68beaa

    SHA512

    b3831d86687185ee2ceda7b5496d86e00fee865cdae06088ccc9c9c050ebfea6adfd69d0c2db4c8ef3c9c7480eeadb00ae67d25e889a1430ccbb3be0b5f01e62

  • memory/2848-5-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB