Analysis

  • max time kernel
    142s
  • max time network
    130s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    04/08/2024, 12:07

General

  • Target

    51b2cfa5d0606a22eaea0cc0d63573a689475fbeb5e6736dd8a189b4563b22cc.exe

  • Size

    3.6MB

  • MD5

    5933e1399ca4b54fc38b834cbd93d1ce

  • SHA1

    82c533665cd4744db245b45748cd0a687f5099a3

  • SHA256

    51b2cfa5d0606a22eaea0cc0d63573a689475fbeb5e6736dd8a189b4563b22cc

  • SHA512

    8005a1986f853f6f958a1a42b972376fbbf9096825e241a12c1e6262cdfac8987140c8e5c0cd2b5d3c3b1495fd86a8e8872da6325896374f58ec6d97d1b64e8c

  • SSDEEP

    49152:1vmtVYqtgIuXnwIBa2v3fc90BkZsnExeIocghqBqQOe0+6/y+wjQg/wpkJzPDOtz:NmltuXn7lv3E9ZNgBeYc7Y0XMavetpdv

Malware Config

Signatures

  • Detect Socks5Systemz Payload 3 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\51b2cfa5d0606a22eaea0cc0d63573a689475fbeb5e6736dd8a189b4563b22cc.exe
    "C:\Users\Admin\AppData\Local\Temp\51b2cfa5d0606a22eaea0cc0d63573a689475fbeb5e6736dd8a189b4563b22cc.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5936
    • C:\Users\Admin\AppData\Local\Temp\is-O01FH.tmp\51b2cfa5d0606a22eaea0cc0d63573a689475fbeb5e6736dd8a189b4563b22cc.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-O01FH.tmp\51b2cfa5d0606a22eaea0cc0d63573a689475fbeb5e6736dd8a189b4563b22cc.tmp" /SL5="$5020A,3476524,54272,C:\Users\Admin\AppData\Local\Temp\51b2cfa5d0606a22eaea0cc0d63573a689475fbeb5e6736dd8a189b4563b22cc.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:2324
      • C:\Users\Admin\AppData\Local\Combiner Free\combinerfree32.exe
        "C:\Users\Admin\AppData\Local\Combiner Free\combinerfree32.exe" -i
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:4360
      • C:\Users\Admin\AppData\Local\Combiner Free\combinerfree32.exe
        "C:\Users\Admin\AppData\Local\Combiner Free\combinerfree32.exe" -s
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:3316

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Combiner Free\combinerfree32.exe

          Filesize

          2.8MB

          MD5

          64e42bf693e7188b1fafdbfc477d574e

          SHA1

          7dcbb6d56bf4d71bc49360e98b1f10673fd0796d

          SHA256

          efce0b3184e216d49090f962d413f3446c58f2a6fcd328cf8b5c18141f58f5ab

          SHA512

          d8f0968c73ca2f365cb847909dc491483fa1ebc66a42fbbd62cdc3205514776cae794f8b7a39313e6de52a9f9a1d6b4cf0091c855794af317c9484663d4f3934

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

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-O01FH.tmp\51b2cfa5d0606a22eaea0cc0d63573a689475fbeb5e6736dd8a189b4563b22cc.tmp

          Filesize

          692KB

          MD5

          389209b27cb27183ccb7cc1a1bf4a6f1

          SHA1

          4ee1ed088549b034080a2223a3118e5ed09f0e40

          SHA256

          1d47cc604d5d25213daeaec3072a1d35cd167e354acb18a925d1e88c87196654

          SHA512

          17a87b242b0241b6a0fd707eab0f50fe869aad23e26aa64c63963c892b70484e5fa9c5b8ce313106f15ee8798387db5abdbcd1e3060ed4fa84da1c9ce4960a56

        • memory/2324-62-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/2324-16-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/3316-87-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-96-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-111-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-108-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-104-0x0000000000AE0000-0x0000000000B82000-memory.dmp

          Filesize

          648KB

        • memory/3316-60-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-103-0x0000000000AE0000-0x0000000000B82000-memory.dmp

          Filesize

          648KB

        • memory/3316-102-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-63-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-66-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-67-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-70-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-73-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-76-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-79-0x0000000000AE0000-0x0000000000B82000-memory.dmp

          Filesize

          648KB

        • memory/3316-82-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-99-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-90-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/3316-93-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/4360-52-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/4360-57-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/4360-53-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/4360-55-0x0000000000400000-0x00000000006C5000-memory.dmp

          Filesize

          2.8MB

        • memory/5936-1-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/5936-2-0x0000000000401000-0x000000000040B000-memory.dmp

          Filesize

          40KB

        • memory/5936-61-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB