Analysis

  • max time kernel
    147s
  • max time network
    156s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    11/08/2024, 01:07

General

  • Target

    28271a653c234b312cefd6e8c0a06756b7c5c3f75784904bf18dc5e6a34ef10f.exe

  • Size

    4.5MB

  • MD5

    0350b7eceb388d5857072657d06abb54

  • SHA1

    761559756bd2e0c1104f50af23cdcf2115206433

  • SHA256

    28271a653c234b312cefd6e8c0a06756b7c5c3f75784904bf18dc5e6a34ef10f

  • SHA512

    954d7be4e0ac40d298df91a1ec0aeefe7d216e75d827ad59ff9dcd7bc6366d33039acc873809e841f77ccedfe4d16edf761271999df0a17b2f705d46d8554478

  • SSDEEP

    98304:NtJ3zP3R1ksHOfUYNSzgt1GD4gYVjujREKDqWGpkX3g/36gfjdJ:FDP3/FHP2gOGMlVqFEuq6X3gvd7D

Malware Config

Signatures

  • Detect Socks5Systemz Payload 1 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 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\28271a653c234b312cefd6e8c0a06756b7c5c3f75784904bf18dc5e6a34ef10f.exe
    "C:\Users\Admin\AppData\Local\Temp\28271a653c234b312cefd6e8c0a06756b7c5c3f75784904bf18dc5e6a34ef10f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4844
    • C:\Users\Admin\AppData\Local\Temp\is-8LC6G.tmp\28271a653c234b312cefd6e8c0a06756b7c5c3f75784904bf18dc5e6a34ef10f.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-8LC6G.tmp\28271a653c234b312cefd6e8c0a06756b7c5c3f75784904bf18dc5e6a34ef10f.tmp" /SL5="$8027A,4429287,54272,C:\Users\Admin\AppData\Local\Temp\28271a653c234b312cefd6e8c0a06756b7c5c3f75784904bf18dc5e6a34ef10f.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:4408
      • C:\Users\Admin\AppData\Local\AVI Codec\avicodec32_64.exe
        "C:\Users\Admin\AppData\Local\AVI Codec\avicodec32_64.exe" -i
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:4612
      • C:\Users\Admin\AppData\Local\AVI Codec\avicodec32_64.exe
        "C:\Users\Admin\AppData\Local\AVI Codec\avicodec32_64.exe" -s
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3196

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\AVI Codec\avicodec32_64.exe

          Filesize

          4.1MB

          MD5

          02377a6a0b0563f5fa84491d1c8336ad

          SHA1

          b8c0486ce1382170d8bae609d940bbcb45122694

          SHA256

          3fc21a22c88ebe5c547901169e5406157dd629af27f8d833bb493f2cd633a3a0

          SHA512

          b2cb8e50903e41e4c74e95e5c2bf7cddc5dbcbf402b134eba334449f26b26d82325da826c6a6b5beb2e956606eff885d84b0419d208d4201a19b6fce0a37f43d

        • C:\Users\Admin\AppData\Local\Temp\is-5ECLO.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-5ECLO.tmp\_isetup\_isdecmp.dll

          Filesize

          13KB

          MD5

          a813d18268affd4763dde940246dc7e5

          SHA1

          c7366e1fd925c17cc6068001bd38eaef5b42852f

          SHA256

          e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

          SHA512

          b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

        • C:\Users\Admin\AppData\Local\Temp\is-8LC6G.tmp\28271a653c234b312cefd6e8c0a06756b7c5c3f75784904bf18dc5e6a34ef10f.tmp

          Filesize

          692KB

          MD5

          85fc5b8836d8625fbfa40a092386e645

          SHA1

          a90bb83f5d8d024bb357a44682267a50406071d6

          SHA256

          6dda4c9c34d1898b592ebeccee9f4b2a2bffefd68296da6310435e13fb63d950

          SHA512

          c50e53c2c695c7ba24b4cc2c2f958e1e9ce4eea9b541684ea41c7cae513919bb80171dcaaf1c18a8f37221737e6a1f8ba0881a224abd3dd09407d0c4edb96aae

        • memory/3196-90-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-77-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-112-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-109-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-105-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-102-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-99-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-65-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-96-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-93-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-68-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-71-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-74-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-85-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-80-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/3196-82-0x0000000002A70000-0x0000000002B12000-memory.dmp

          Filesize

          648KB

        • memory/4408-12-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/4408-67-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/4612-61-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/4612-62-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/4612-60-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/4612-58-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/4844-0-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4844-66-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4844-2-0x0000000000401000-0x000000000040B000-memory.dmp

          Filesize

          40KB