Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    10/08/2024, 22:29

General

  • Target

    920477db829ff70d2a2d48c58854d7429267bd0a114c48fdc4cf13f9c815b394.exe

  • Size

    4.5MB

  • MD5

    4701bf711ec2020789ade4b25ee8f2bb

  • SHA1

    e79a678815aef7d6b86b9ea30c69aa9fac637f8b

  • SHA256

    920477db829ff70d2a2d48c58854d7429267bd0a114c48fdc4cf13f9c815b394

  • SHA512

    8adb129a6cd01c1e3f8925cfea323bbe9bcaaa1d52763d1243cf3c16886f8ff6d5b31c00f9c554e0f7a2ca388e8288c38fa6fb3f182eb8ee9121078945a665d0

  • SSDEEP

    98304:NNR38dfEtnSkdKChI/8jVUQ7Q3KEP4iY09ap47/MWRiKC0Ux2X0hndJ:DR38JEtVKD/8ZUQ72KEP4iY0U47tRi9v

Malware Config

Signatures

  • Detect Socks5Systemz Payload 3 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\920477db829ff70d2a2d48c58854d7429267bd0a114c48fdc4cf13f9c815b394.exe
    "C:\Users\Admin\AppData\Local\Temp\920477db829ff70d2a2d48c58854d7429267bd0a114c48fdc4cf13f9c815b394.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1128
    • C:\Users\Admin\AppData\Local\Temp\is-4Q2ST.tmp\920477db829ff70d2a2d48c58854d7429267bd0a114c48fdc4cf13f9c815b394.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-4Q2ST.tmp\920477db829ff70d2a2d48c58854d7429267bd0a114c48fdc4cf13f9c815b394.tmp" /SL5="$700DC,4411396,54272,C:\Users\Admin\AppData\Local\Temp\920477db829ff70d2a2d48c58854d7429267bd0a114c48fdc4cf13f9c815b394.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:5020
      • 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:5036
      • 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:1236

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

          e73a22508a925e41662b76ba4e494a19

          SHA1

          b6ef636f469153f6cd2689e0bd43eaf412bca283

          SHA256

          b4a034644b3237264e39d049ba6b531bbab88ab4086879a7bd5b4e5b16200808

          SHA512

          6575c54df45cf50835cba73cb5de8741e17150ed0c1564947f898dc226cce8b939bedd21d1f2eb1e1ea3462ebd94b67323fd734384db9fe564dec0dd0ebd1b80

        • C:\Users\Admin\AppData\Local\Temp\is-4Q2ST.tmp\920477db829ff70d2a2d48c58854d7429267bd0a114c48fdc4cf13f9c815b394.tmp

          Filesize

          692KB

          MD5

          85fc5b8836d8625fbfa40a092386e645

          SHA1

          a90bb83f5d8d024bb357a44682267a50406071d6

          SHA256

          6dda4c9c34d1898b592ebeccee9f4b2a2bffefd68296da6310435e13fb63d950

          SHA512

          c50e53c2c695c7ba24b4cc2c2f958e1e9ce4eea9b541684ea41c7cae513919bb80171dcaaf1c18a8f37221737e6a1f8ba0881a224abd3dd09407d0c4edb96aae

        • C:\Users\Admin\AppData\Local\Temp\is-HGV83.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-HGV83.tmp\_isetup\_isdecmp.dll

          Filesize

          13KB

          MD5

          a813d18268affd4763dde940246dc7e5

          SHA1

          c7366e1fd925c17cc6068001bd38eaef5b42852f

          SHA256

          e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

          SHA512

          b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

        • memory/1128-66-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/1128-0-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/1128-2-0x0000000000401000-0x000000000040B000-memory.dmp

          Filesize

          40KB

        • memory/1236-94-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-82-0x0000000002640000-0x00000000026E2000-memory.dmp

          Filesize

          648KB

        • memory/1236-115-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-65-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-112-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-108-0x0000000002640000-0x00000000026E2000-memory.dmp

          Filesize

          648KB

        • memory/1236-68-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-71-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-74-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-77-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-80-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-107-0x0000000002640000-0x00000000026E2000-memory.dmp

          Filesize

          648KB

        • memory/1236-85-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-91-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-106-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-97-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-100-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/1236-103-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/5020-13-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/5020-67-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/5036-61-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/5036-58-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB

        • memory/5036-60-0x0000000000400000-0x0000000000815000-memory.dmp

          Filesize

          4.1MB