Overview

overview

10

Static

static

5

3873f8364f...66.exe

windows7-x64

10

3873f8364f...66.exe

windows10-2004-x64

1

Analysis

  • max time kernel
    127s
  • max time network
    121s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    31/12/2023, 13:42

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General

  • Target

    3873f8364f44d6913f9a9d24c87c9966.exe

  • Size

    512KB

  • MD5

    3873f8364f44d6913f9a9d24c87c9966

  • SHA1

    4385490a341605c460df30643d5c8c311513bce9

  • SHA256

    8ae357c63f21bf00a7def4c00f551760d18bd1ff81f2869dfd0cb9351c7237fa

  • SHA512

    baf1c529a7e96e88e3e9e15d4dc1de913eef7a051972b1054d2b57187ebfb921a25580e26b56a7c08c12a9529dfe5bf5a392b20c6b0b01da8f738f26d188a70d

  • SSDEEP

    6144:1VY0W0sVVZ/dkq5BCoFaJ2i5Lf24C07N5OvSLTUF6pQxI6Upe2cBnTu19bcodj6+:1gDhdkq5BCoC5LfWSLTUQpr2Zu19Qm5V

Score
10/10
evasionpersistencespywarestealertrojan

Malware Config

Signatures

  • Modifies visibility of file extensions in Explorer 2 TTPs 1 IoCs
    evasion
  • Modifies visiblity of hidden/system files in Explorer 2 TTPs 1 IoCs
    evasion
  • Windows security bypass 2 TTPs 5 IoCs
    evasiontrojan
  • Disables RegEdit via registry modification 1 IoCs
    evasion
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Windows security modification 2 TTPs 6 IoCs
    evasiontrojan
  • Adds Run key to start application 2 TTPs 3 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 64 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Modifies WinLogon 2 TTPs 2 IoCs
    persistence
  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Drops file in System32 directory 9 IoCs
  • Drops file in Program Files directory 14 IoCs
  • Drops file in Windows directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
    adwarespyware
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of FindShellTrayWindow 18 IoCs
  • Suspicious use of SendNotifyMessage 18 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3873f8364f44d6913f9a9d24c87c9966.exe
    "C:\Users\Admin\AppData\Local\Temp\3873f8364f44d6913f9a9d24c87c9966.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:832
    • C:\Windows\SysWOW64\wxszfimvwe.exe
      wxszfimvwe.exe
      2⤵
      • Modifies visibility of file extensions in Explorer
      • Modifies visiblity of hidden/system files in Explorer
      • Windows security bypass
      • Disables RegEdit via registry modification
      • Executes dropped EXE
      • Loads dropped DLL
      • Windows security modification
      • Enumerates connected drives
      • Modifies WinLogon
      • Drops file in System32 directory
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:1728
      • C:\Windows\SysWOW64\avmsrlwf.exe
        C:\Windows\system32\avmsrlwf.exe
        3⤵
        • Executes dropped EXE
        • Enumerates connected drives
        • Drops file in Program Files directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2956
    • C:\Windows\SysWOW64\avmsrlwf.exe
      avmsrlwf.exe
      2⤵
      • Executes dropped EXE
      • Enumerates connected drives
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2848
    • C:\Windows\SysWOW64\eecpigkjlwhnk.exe
      eecpigkjlwhnk.exe
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2712
    • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
      "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Windows\mydoc.rtf"
      2⤵
      • Drops file in Windows directory
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2748
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
          PID:1968
      • C:\Windows\SysWOW64\wrdppivqpubkvqm.exe
        wrdppivqpubkvqm.exe
        2⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2708

    Network

    MITRE ATT&CK Enterprise v15

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    Downloads

    • C:\Users\Admin\AppData\Roaming\Microsoft\Templates\Normal.dotm
      Filesize

      20KB

      MD5

      c8fa8d99032076551b760b9bf38b635a

      SHA1

      1408c08e9567bfa672677c142b573b24db2161f1

      SHA256

      fc3bddddcd3d7923b2b5b8dd6d628d27d6974ff0a2773320fa4bca34e9f74f7f

      SHA512

      8349788b07ba2dc9cdf07f65a68e1c92c420771b1a034bc0894bd0b5a1cb6373e6e367bb03dad5a6f88542fc474c0e6ab5e83490abab31f668dd0852caece78d

      Download Submit

    • memory/832-0-0x0000000000400000-0x0000000000496000-memory.dmp

      Filesize

      600KB

      Download

    • memory/2748-45-0x000000002FD91000-0x000000002FD92000-memory.dmp

      Filesize

      4KB

      Download

    • memory/2748-46-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

      Download

    • memory/2748-47-0x000000007140D000-0x0000000071418000-memory.dmp

      Filesize

      44KB

      Download

    • memory/2748-66-0x000000007140D000-0x0000000071418000-memory.dmp

      Filesize

      44KB

      Download

    • memory/2748-100-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

      Download

    • memory/2748-101-0x000000007140D000-0x0000000071418000-memory.dmp

      Filesize

      44KB

      Download