Analysis

  • max time kernel
    123s
  • max time network
    129s
  • 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 06:03

General

  • Target

    753ea801ae752661103a6dc26db54185f6bf7294cd7957343583f0377cae47a1.exe

  • Size

    4.6MB

  • MD5

    6d37dfd43fe60ea1ec709e38e11c93de

  • SHA1

    aa535a2b2858e9991b6dddd391254b78fb654c88

  • SHA256

    753ea801ae752661103a6dc26db54185f6bf7294cd7957343583f0377cae47a1

  • SHA512

    66c50bc47e62d6066ab0519bb9890ab23f9fa1cd57f57a61aee124349d6548400815a7f341ceea4d70c3442e1cccf270f026a817a42d50f1c37933b6a05bbec6

  • SSDEEP

    98304:m625nEAey9Pe2a/Thwac4p6g98YevsugBrJdDUxj0WM/O2:HmEnMi7hwa9SmHCwG2

Malware Config

Extracted

Family

socks5systemz

C2

butduaj.com

http://butduaj.com/search/?q=67e28dd83d5fa77a480faf1e7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978f171ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff818c1ec959d39

Signatures

  • Detect Socks5Systemz Payload 1 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\753ea801ae752661103a6dc26db54185f6bf7294cd7957343583f0377cae47a1.exe
    "C:\Users\Admin\AppData\Local\Temp\753ea801ae752661103a6dc26db54185f6bf7294cd7957343583f0377cae47a1.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3516
    • C:\Users\Admin\AppData\Local\Temp\is-2S0ON.tmp\753ea801ae752661103a6dc26db54185f6bf7294cd7957343583f0377cae47a1.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-2S0ON.tmp\753ea801ae752661103a6dc26db54185f6bf7294cd7957343583f0377cae47a1.tmp" /SL5="$4021C,4587786,54272,C:\Users\Admin\AppData\Local\Temp\753ea801ae752661103a6dc26db54185f6bf7294cd7957343583f0377cae47a1.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2200
      • 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:1700
      • 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:4348

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\is-2S0ON.tmp\753ea801ae752661103a6dc26db54185f6bf7294cd7957343583f0377cae47a1.tmp
    Filesize

    680KB

    MD5

    94ebd7c7c5adcf2267929fba503116d5

    SHA1

    e7bd7046fc47d6d80e6817580fcd5aff9e198828

    SHA256

    f9af6cca41dec59fbcd3a34f5b5f896d426d8aa174398bfd6be6020e10c8f7ed

    SHA512

    de6874a3a0ab12aad2713c6363b561e4a709766ce4e139bba91fd420b6151254c8b1451a8d368f3dba076d639f53cd7e7860ede9c192a2e71c11c310afc6daad

  • C:\Users\Admin\AppData\Local\Temp\is-G68K2.tmp\_isetup\_iscrypt.dll
    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

    2.6MB

    MD5

    40b6b101e2ae979a0040133ace3f9829

    SHA1

    cbd72391ec7fb36a909e1ea05fd9b86e495eaa19

    SHA256

    3c58baf2a4d86e869276e5e69cdacb60389ac9a622b213d0fefe2344d1cf1b4c

    SHA512

    62a74607e3be3bd6081e219e9658517c6af10cb45877c7e24790543cb1a743746c8143685a0d49371d0e8a9c652497eb06093d7ba40d30db6f18d0bcab9301f8

  • memory/1700-60-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/1700-63-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/1700-65-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/1700-59-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/2200-70-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/2200-10-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/3516-2-0x0000000000401000-0x000000000040B000-memory.dmp
    Filesize

    40KB

  • memory/3516-0-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/3516-69-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/4348-74-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-94-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-68-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-75-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-78-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-81-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-84-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-89-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-86-0x00000000009B0000-0x0000000000A52000-memory.dmp
    Filesize

    648KB

  • memory/4348-71-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-97-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-100-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-103-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-106-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-109-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-113-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB

  • memory/4348-116-0x0000000000400000-0x00000000006A7000-memory.dmp
    Filesize

    2.7MB