Analysis

  • max time kernel
    142s
  • max time network
    130s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240611-en
  • resource tags

    arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    24-06-2024 22:17

General

  • Target

    38b7d292b0107fce71891f0719164241775c43df69e40bd16662e42b7a03e355.exe

  • Size

    4.7MB

  • MD5

    dbedcaea3700022ee9a431e4d8a7a6d0

  • SHA1

    2d31e80959a2b81628537db2f8c82312bfe28a4d

  • SHA256

    38b7d292b0107fce71891f0719164241775c43df69e40bd16662e42b7a03e355

  • SHA512

    45dc7235f4e788df6f686c420c405ea8ec698955765a393d1ebfdf103853c94cf88ef472edbba01829c04cafdb7835768712ad4df27a1468bfac2f67068ed7ea

  • SSDEEP

    98304:mLosKuYEl/+r66A9ha0U8xebM5TSXAOqRv4CN:D4b0r66KhHWGcAOQ48

Malware Config

Extracted

Family

socks5systemz

C2

bmklimj.com

http://bmklimj.com/search/?q=67e28dd83d0ea428165baf167c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a371ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff613c6e8909832

http://bmklimj.com/search/?q=67e28dd83d0ea428165baf167c27d78406abdd88be4b12eab517aa5c96bd86ea92834496148ab2865b77f80ebad9c40f7cb63037ed2ab423a4664383ba915d911ec07bb606a0708727e40ea678c751bbe34efb0e2807e12571c17f3e83fe16c1e6979c3cc86d9f

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\38b7d292b0107fce71891f0719164241775c43df69e40bd16662e42b7a03e355.exe
    "C:\Users\Admin\AppData\Local\Temp\38b7d292b0107fce71891f0719164241775c43df69e40bd16662e42b7a03e355.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3092
    • C:\Users\Admin\AppData\Local\Temp\is-J3G4B.tmp\38b7d292b0107fce71891f0719164241775c43df69e40bd16662e42b7a03e355.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-J3G4B.tmp\38b7d292b0107fce71891f0719164241775c43df69e40bd16662e42b7a03e355.tmp" /SL5="$70062,4722858,54272,C:\Users\Admin\AppData\Local\Temp\38b7d292b0107fce71891f0719164241775c43df69e40bd16662e42b7a03e355.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:4552
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:632
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:4364

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\is-HG0BU.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-J3G4B.tmp\38b7d292b0107fce71891f0719164241775c43df69e40bd16662e42b7a03e355.tmp

    Filesize

    680KB

    MD5

    58a22210313f4658cd89a8b89fbe724d

    SHA1

    64564a394418bd0d993cc97c53250bfcee405365

    SHA256

    710a06d600279fe3e2648eac534811fd8445b79714a7970eefb4bfe19b48e5c9

    SHA512

    a7c2c934cd9f99230600bd25078fc5997ac45bf08acdd9cdd3785d3eb0448dfc4fd6b2ae4ca609eb82922b49e4c33bfe88285bccc8de01202b13d1bc36dcebdf

  • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe

    Filesize

    2.8MB

    MD5

    b6483e2c6a048b03a30a053127348311

    SHA1

    97e7a48d992ce63c90a17b9637395e0bbbd1d177

    SHA256

    85bca50c48d17d2ccb74e6a9624e02e5126091b75256a92f5c6194ed7d75acf5

    SHA512

    d8566c42def5e2924fc5cf7c4e4b2f2571e3fc9bb2831bfb12adbeb497e0ffa2f37dc78fc1425cfc9edbe0292dfd26170633c9504e42d25f6616486103a80c42

  • memory/632-59-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/632-60-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/632-63-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/632-65-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/3092-70-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/3092-3-0x0000000000401000-0x000000000040B000-memory.dmp

    Filesize

    40KB

  • memory/3092-1-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4364-76-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-108-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-67-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-120-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-72-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-75-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-117-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-79-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-82-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-85-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-88-0x0000000000AD0000-0x0000000000B72000-memory.dmp

    Filesize

    648KB

  • memory/4364-91-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-96-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-99-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-102-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-105-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-69-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-111-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4364-112-0x0000000000AD0000-0x0000000000B72000-memory.dmp

    Filesize

    648KB

  • memory/4364-113-0x0000000000AD0000-0x0000000000B72000-memory.dmp

    Filesize

    648KB

  • memory/4552-10-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/4552-71-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB