Analysis

  • max time kernel
    147s
  • max time network
    157s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    24-06-2024 22:48

General

  • Target

    fa18cb656c819bbbb3e28361d163228833fcaec39a173fb1d7a79559f3ce0b7e.exe

  • Size

    4.8MB

  • MD5

    a40cfcf41cc52dc4cc07746c2e114bc7

  • SHA1

    809210d9c24835ac09fc663e266e0d174bd9db25

  • SHA256

    fa18cb656c819bbbb3e28361d163228833fcaec39a173fb1d7a79559f3ce0b7e

  • SHA512

    b3c3325be688d13f2922c13aff208731a5d0c962d9fda2c9eddce0a3d9419649e70e74e44203be0b3937a2901c40873c6d4c2ce394389d6e30e97bfc06e08550

  • SSDEEP

    98304:m6sH9MZthQUk6CDsQritBHPZmZqc0Bx2dwe7Zom2vE2K9glIRW31HX+6pI:e6ZzQUk6emBfYH6spOlvlO6pI

Malware Config

Extracted

Family

socks5systemz

C2

cetdwgb.net

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 3 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\fa18cb656c819bbbb3e28361d163228833fcaec39a173fb1d7a79559f3ce0b7e.exe
    "C:\Users\Admin\AppData\Local\Temp\fa18cb656c819bbbb3e28361d163228833fcaec39a173fb1d7a79559f3ce0b7e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4308
    • C:\Users\Admin\AppData\Local\Temp\is-I73S1.tmp\fa18cb656c819bbbb3e28361d163228833fcaec39a173fb1d7a79559f3ce0b7e.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-I73S1.tmp\fa18cb656c819bbbb3e28361d163228833fcaec39a173fb1d7a79559f3ce0b7e.tmp" /SL5="$40220,4738594,54272,C:\Users\Admin\AppData\Local\Temp\fa18cb656c819bbbb3e28361d163228833fcaec39a173fb1d7a79559f3ce0b7e.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3272
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:4676
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:2328

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\is-I73S1.tmp\fa18cb656c819bbbb3e28361d163228833fcaec39a173fb1d7a79559f3ce0b7e.tmp

    Filesize

    680KB

    MD5

    b636efd5b0d9411fce26090f48666e14

    SHA1

    b51a5479356b513977647fd7bbbedcbba2dd3343

    SHA256

    9c048616826131137b7b69c0a91dbb58f045f489a52fec8019edcad465a3e683

    SHA512

    4758cbae518d68a5cb222e1e1e65782c6b20fdab9a83985a91ca73608211f7d19e948c3947374d5243d4ccd837f56d9b024376867e25431de7e94bdb17ccbd65

  • C:\Users\Admin\AppData\Local\Temp\is-VPS7F.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

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

    Filesize

    2.8MB

    MD5

    f500897f8f93756496247a29bfceb706

    SHA1

    080a9e336e98d9a9d8b70a95367d625503bac8c6

    SHA256

    23a5da864a27e395fd06a929f48aff41104a3e556cfe416acc5e8f0aa1d8278b

    SHA512

    dfa3272be116c6d2519f0d52c114cffc47d763e8cec12b134c8c21bae6edb2a26d5f206433d8a8cea9afb0609a2fa7101d58f732eeb6cba5073e378a54ad07b2

  • memory/2328-91-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-76-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-117-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-114-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-111-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-108-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-105-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-67-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-69-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-102-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-99-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-72-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-75-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-96-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-79-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-82-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-85-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2328-88-0x00000000009E0000-0x0000000000A82000-memory.dmp

    Filesize

    648KB

  • memory/3272-12-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/3272-71-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/4308-3-0x0000000000401000-0x000000000040B000-memory.dmp

    Filesize

    40KB

  • memory/4308-70-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4308-0-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4676-65-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4676-63-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4676-60-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4676-59-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB