Analysis

  • max time kernel
    122s
  • max time network
    132s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09-06-2024 05:03

General

  • Target

    32c3a85f7fe86558307ec696290e99d33e0f4e552ea2036e83ea52968ede5168.exe

  • Size

    4.6MB

  • MD5

    df9a7040f5847c6c80b66890bdc18fd5

  • SHA1

    860ad7a9171f1e405d6e679016ef11c5b1ebbeb7

  • SHA256

    32c3a85f7fe86558307ec696290e99d33e0f4e552ea2036e83ea52968ede5168

  • SHA512

    a68a4749e2225c927f02a45334c55c997cf228037c62b8185257f8555f005d7787112931a93911e7a3ac5fe1d1d948f61cbb7411f8958933b06cd4f042024e90

  • SSDEEP

    98304:muiIZFQkSXSH0LFm6alaly8Zzf326yJUr5sr19GDjtALLowPdEwXizF:oIZ+kTKmXag2rZ5c19ajtALLrVK

Malware Config

Extracted

Family

socks5systemz

C2

bnrewcr.com

http://bnrewcr.com/search/?q=67e28dd86a5df77c4306aa4d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978fe71ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff818c0e6909b3d

http://bnrewcr.com/search/?q=67e28dd86a5df77c4306aa4d7c27d78406abdd88be4b12eab517aa5c96bd86e89d834d845a8bbc896c58e713bc90c91936b5281fc235a925ed3e5dd6bd974a95129070b616e96cc92be510b866db51b9e34eed4c2b14a82966836f23d7f210c7ee92933bc46a9710

Signatures

  • Detect Socks5Systemz Payload 3 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 1 IoCs
  • Unexpected DNS network traffic destination 1 IoCs

    Network traffic to other servers than the configured DNS servers was detected on the DNS port.

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\32c3a85f7fe86558307ec696290e99d33e0f4e552ea2036e83ea52968ede5168.exe
    "C:\Users\Admin\AppData\Local\Temp\32c3a85f7fe86558307ec696290e99d33e0f4e552ea2036e83ea52968ede5168.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4996
    • C:\Users\Admin\AppData\Local\Temp\is-5IGL2.tmp\32c3a85f7fe86558307ec696290e99d33e0f4e552ea2036e83ea52968ede5168.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-5IGL2.tmp\32c3a85f7fe86558307ec696290e99d33e0f4e552ea2036e83ea52968ede5168.tmp" /SL5="$701EE,4608184,54272,C:\Users\Admin\AppData\Local\Temp\32c3a85f7fe86558307ec696290e99d33e0f4e552ea2036e83ea52968ede5168.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3128
      • C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
        "C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe" -i
        3⤵
        • Executes dropped EXE
        PID:3888
      • C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
        "C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe" -s
        3⤵
        • Executes dropped EXE
        PID:3872

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\is-334SF.tmp\_isetup\_iscrypt.dll
    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-5IGL2.tmp\32c3a85f7fe86558307ec696290e99d33e0f4e552ea2036e83ea52968ede5168.tmp
    Filesize

    680KB

    MD5

    2c9ec59f4f0ec997951b3bcf2dae943f

    SHA1

    bf8cf3957867023f8f3a3494a9cf873f48da4628

    SHA256

    c8f228ac4927de36a1a96e75c025094df102b39385ac0abf1a51ae54d0b4d7a4

    SHA512

    2b9b89143be87d15b86b6d105f658d9d296f74d712a793d705f6f2e23f46de1d8ad4842e04f5811dcf0020ab78a09cda966a0b164419611d96f592c0c5054e8e

  • C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
    Filesize

    2.6MB

    MD5

    c145ec37ae851694e4960fc7f3e7c8a7

    SHA1

    584977dad1577ac43cefd38752e19b8a5baff131

    SHA256

    c2bcb03b8f2110afc95598d42d581667e208824adec38b5fa3fd7887cfb61de4

    SHA512

    17f976d00f327a736a43910abfff9ea9d9f8a204d99091aefb98570fbb0ab3898c478a0c2acab65622831ab17a220fbe2ca110cac601862d634c3b960412229e

  • memory/3128-70-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/3128-13-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/3872-97-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-106-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-118-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-115-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-68-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-110-0x00000000027F0000-0x0000000002892000-memory.dmp
    Filesize

    648KB

  • memory/3872-111-0x00000000027F0000-0x0000000002892000-memory.dmp
    Filesize

    648KB

  • memory/3872-109-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-71-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-74-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-77-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-80-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-83-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-84-0x00000000027F0000-0x0000000002892000-memory.dmp
    Filesize

    648KB

  • memory/3872-88-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-94-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-103-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3872-100-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3888-59-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3888-60-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3888-64-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/3888-65-0x0000000000400000-0x00000000006A8000-memory.dmp
    Filesize

    2.7MB

  • memory/4996-3-0x0000000000401000-0x000000000040B000-memory.dmp
    Filesize

    40KB

  • memory/4996-0-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/4996-69-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB