Analysis

  • max time kernel
    141s
  • max time network
    126s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240729-en
  • resource tags

    arch:x64arch:x86image:win11-20240729-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    02/08/2024, 10:20

General

  • Target

    72a85d7d7a3d2e53d28457ca00e99625c0070e8c0c6869d0c6db5e9776381d2d.exe

  • Size

    4.0MB

  • MD5

    8a2da55b1183ba0cdb5b86aa6108f974

  • SHA1

    a6fc4b26d00f91440b1369dd2d7137224383b243

  • SHA256

    72a85d7d7a3d2e53d28457ca00e99625c0070e8c0c6869d0c6db5e9776381d2d

  • SHA512

    eeffb0b87ded3d0d3ae776bb0683f6bf860b94cf3d85b2b9c1417cf990fc7ad1bda9cef844bca8e607e0109f344100304f0e870fa51602e36696cf003fe83316

  • SSDEEP

    98304:NW6OIIU3/3AtTUBoxwsx5DQLKox4PZSmaEDjizt+qWnmjfYWXohdi:c6OrKAtTgotxR0Kox4x6E3irWmjfYwSk

Malware Config

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.

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\72a85d7d7a3d2e53d28457ca00e99625c0070e8c0c6869d0c6db5e9776381d2d.exe
    "C:\Users\Admin\AppData\Local\Temp\72a85d7d7a3d2e53d28457ca00e99625c0070e8c0c6869d0c6db5e9776381d2d.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:488
    • C:\Users\Admin\AppData\Local\Temp\is-JPLU5.tmp\72a85d7d7a3d2e53d28457ca00e99625c0070e8c0c6869d0c6db5e9776381d2d.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-JPLU5.tmp\72a85d7d7a3d2e53d28457ca00e99625c0070e8c0c6869d0c6db5e9776381d2d.tmp" /SL5="$502A6,3947907,54272,C:\Users\Admin\AppData\Local\Temp\72a85d7d7a3d2e53d28457ca00e99625c0070e8c0c6869d0c6db5e9776381d2d.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3452
      • C:\Users\Admin\AppData\Local\AC3Filter\ac3filter.exe
        "C:\Users\Admin\AppData\Local\AC3Filter\ac3filter.exe" -i
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3636
      • C:\Users\Admin\AppData\Local\AC3Filter\ac3filter.exe
        "C:\Users\Admin\AppData\Local\AC3Filter\ac3filter.exe" -s
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:232

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\AC3Filter\ac3filter.exe

          Filesize

          4.4MB

          MD5

          904a8cc14f2c82e8672cd82990fbfa71

          SHA1

          111e9fbbb2ef0a56b59df698727c48fc054efb82

          SHA256

          f066a0888bc5ad3b8c91cdbc16ebd5046327149b8baa735226b118d9be0b32b5

          SHA512

          1f7d8484df0cfa8e7ee887398df81e5d1bc92f029330c1ba34fd29f2e6d6c0a33a3133f436ad303442c33320d2ed1eb76157a9d37795451fd238396cc38c4645

        • C:\Users\Admin\AppData\Local\Temp\is-0GI9C.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-JPLU5.tmp\72a85d7d7a3d2e53d28457ca00e99625c0070e8c0c6869d0c6db5e9776381d2d.tmp

          Filesize

          692KB

          MD5

          b26f241a82d0fe33b717d9b11f784b6f

          SHA1

          f21b6bb700e33fda7413fd383f200b99af7af5d0

          SHA256

          56e6db8c3a0ce885cf731ce797c34e4a4d04380e23ad0fc1f77676b2f8dfa3ce

          SHA512

          d35f972621f853c0b0650c6b3240a2632a564bdd05215010c40cae7092d1407d557dc32a65359acd843d1c64ba635ae273d764d26fa6948623be40834425379a

        • memory/232-82-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-68-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-110-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-107-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-103-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-100-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-97-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-60-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-61-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-94-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-91-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-64-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-66-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-88-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-71-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-74-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-77-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/232-79-0x0000000000B70000-0x0000000000C12000-memory.dmp

          Filesize

          648KB

        • memory/488-0-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/488-62-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/488-2-0x0000000000401000-0x000000000040B000-memory.dmp

          Filesize

          40KB

        • memory/3452-16-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/3452-63-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/3636-52-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/3636-57-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/3636-53-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB

        • memory/3636-55-0x0000000000400000-0x0000000000875000-memory.dmp

          Filesize

          4.5MB