Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-06-2024 18:16

General

  • Target

    e7b94b77e6d437223bf142aaf0fbeb2c37cdbd209364bb026ce528f2be2c0941.exe

  • Size

    4.8MB

  • MD5

    1708a62a342a388c958166b8e97fa9c3

  • SHA1

    2778da8bf5964c7d95304bcd5973435a306adaf2

  • SHA256

    e7b94b77e6d437223bf142aaf0fbeb2c37cdbd209364bb026ce528f2be2c0941

  • SHA512

    9d1b09235169afadac7f8baa2d6d137230f661b6bccccdc7e619f77f0eecea329c6e4986e43fe4c35df2841fc26b006dfd2122d895e670b91cbf90503ef462a9

  • SSDEEP

    98304:m0c7HP9xPn1XP2ZfIjaJwcJQnacSmYjtzKuykrFE:7+bEq2JSF92tzBS

Malware Config

Extracted

Family

socks5systemz

C2

buizuyo.com

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\e7b94b77e6d437223bf142aaf0fbeb2c37cdbd209364bb026ce528f2be2c0941.exe
    "C:\Users\Admin\AppData\Local\Temp\e7b94b77e6d437223bf142aaf0fbeb2c37cdbd209364bb026ce528f2be2c0941.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1828
    • C:\Users\Admin\AppData\Local\Temp\is-MLKRK.tmp\e7b94b77e6d437223bf142aaf0fbeb2c37cdbd209364bb026ce528f2be2c0941.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-MLKRK.tmp\e7b94b77e6d437223bf142aaf0fbeb2c37cdbd209364bb026ce528f2be2c0941.tmp" /SL5="$100048,4745724,54272,C:\Users\Admin\AppData\Local\Temp\e7b94b77e6d437223bf142aaf0fbeb2c37cdbd209364bb026ce528f2be2c0941.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:1232
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:3520
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:1632

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-MLKRK.tmp\e7b94b77e6d437223bf142aaf0fbeb2c37cdbd209364bb026ce528f2be2c0941.tmp

    Filesize

    680KB

    MD5

    bf530597367b891a3a6d5e2e1fcffb19

    SHA1

    718ada641ddb4179e033042339e09f46331c0a6b

    SHA256

    8e79a5b0e62fed326781ab7300a53f5ca0dd61b345adf957438cffd0dc9cf316

    SHA512

    8e28b4d7c9241d7d457eb1ec7e0aca92a49ae32df0a89688ab816bbf813f70bfd12138a2923f4cad0e116dec708b160c63816c1e711b168830cd96839041c129

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

    Filesize

    2.8MB

    MD5

    92e08351885c1ff60328cc3749b4fe41

    SHA1

    fc8a7001049f873d8947b7ebd47dca342cf87581

    SHA256

    13395bf8ae317a661015ba46814273f9274c3beb91d4bc73f6fe69e404ea474e

    SHA512

    97cdc712e1133550f82f3b888cfaf14a28817bb3402ae91fea960863c0ae219fa184fcc3e44923c72f60382d18fe145627db8dd1782724877c91c57cf6cfa8d4

  • memory/1232-69-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1232-12-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1632-95-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-101-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-113-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-110-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-107-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-67-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-104-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-98-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-70-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-73-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-76-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-79-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-82-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-85-0x0000000000A20000-0x0000000000AC2000-memory.dmp

    Filesize

    648KB

  • memory/1632-87-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1632-92-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1828-68-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/1828-0-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/1828-2-0x0000000000401000-0x000000000040B000-memory.dmp

    Filesize

    40KB

  • memory/3520-59-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/3520-60-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/3520-63-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/3520-64-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB