Analysis

  • max time kernel
    293s
  • max time network
    291s
  • platform
    windows7_x64
  • resource
    win7-20240419-en
  • resource tags

    arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system
  • submitted
    30-05-2024 22:42

General

  • Target

    26b9438c54564bf9b40b4f17641d995b21e42421a50f32ff8b39dc46447ce726.exe

  • Size

    5.4MB

  • MD5

    d9ff3685d869fb364e3e12b2676488a0

  • SHA1

    973e1a94ebb1b85434b2e8817476bc83603fa561

  • SHA256

    26b9438c54564bf9b40b4f17641d995b21e42421a50f32ff8b39dc46447ce726

  • SHA512

    1e819bc363dde572f6c3d61ecb6b33b2ad04d21c8868a36a6cf30bf63d3c0f670e42d8fe52c97bfaeb407ac38913175612e2fed4fab13d686b473617b02cfddf

  • SSDEEP

    98304:msEXAXTJPi2QkAdK7E5UtwXZzZCfM15nbuXMByzaPXWPTU+ifOrpmp9Ef9qCgYdk:mAl67jdCG8qZz0fMzbvWPUFEVxgYdA7l

Malware Config

Signatures

  • Detect Socks5Systemz Payload 3 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 6 IoCs
  • Unexpected DNS network traffic destination 2 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 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\26b9438c54564bf9b40b4f17641d995b21e42421a50f32ff8b39dc46447ce726.exe
    "C:\Users\Admin\AppData\Local\Temp\26b9438c54564bf9b40b4f17641d995b21e42421a50f32ff8b39dc46447ce726.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2032
    • C:\Users\Admin\AppData\Local\Temp\is-D68CG.tmp\26b9438c54564bf9b40b4f17641d995b21e42421a50f32ff8b39dc46447ce726.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-D68CG.tmp\26b9438c54564bf9b40b4f17641d995b21e42421a50f32ff8b39dc46447ce726.tmp" /SL5="$40150,5407925,54272,C:\Users\Admin\AppData\Local\Temp\26b9438c54564bf9b40b4f17641d995b21e42421a50f32ff8b39dc46447ce726.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2160
      • C:\Users\Admin\AppData\Local\FIaudioConverter\fiaudioconverter.exe
        "C:\Users\Admin\AppData\Local\FIaudioConverter\fiaudioconverter.exe" -i
        3⤵
        • Executes dropped EXE
        PID:2480
      • C:\Users\Admin\AppData\Local\FIaudioConverter\fiaudioconverter.exe
        "C:\Users\Admin\AppData\Local\FIaudioConverter\fiaudioconverter.exe" -s
        3⤵
        • Executes dropped EXE
        PID:1748

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Local\FIaudioConverter\fiaudioconverter.exe

    Filesize

    2.7MB

    MD5

    b679fecf43b8f6f3d84e60c0dd48d3be

    SHA1

    e699029d8e183ffb58cc748faef346ecb320e87c

    SHA256

    54c7c6ab7c62910a604de46055bf6f3a5f8b501c9d2eaadc38df6292bfe0ddb0

    SHA512

    821aaf55586a89c88f82e0f9486ddd44e5524ffe7d19c8c4ed1d26779da2fd4d92bef8ce17ea58307edfd799afc98ec045ddc44f00efa6d46aaf3e9c86e18456

  • \Users\Admin\AppData\Local\Temp\is-D68CG.tmp\26b9438c54564bf9b40b4f17641d995b21e42421a50f32ff8b39dc46447ce726.tmp

    Filesize

    680KB

    MD5

    791348257179b7a0bd2a513fc9b19618

    SHA1

    783834fa3c937de3d5cefc1e72cfd0cc63c657fc

    SHA256

    5cdf04dee7d14c9c6d768d5c3092979f3be25f5148ef39051dee584a662c921c

    SHA512

    8e68ed3e98f5066e5aa61e30fbe24ab500274e7994d74e8b167f5cd2b1512dde8a5c89cb5a8eedd4ae67b1414c08b312c999e79008d9e7c0255cb0c1a323ab63

  • \Users\Admin\AppData\Local\Temp\is-ERLSU.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • \Users\Admin\AppData\Local\Temp\is-ERLSU.tmp\_isetup\_isdecmp.dll

    Filesize

    13KB

    MD5

    a813d18268affd4763dde940246dc7e5

    SHA1

    c7366e1fd925c17cc6068001bd38eaef5b42852f

    SHA256

    e19781aabe466dd8779cb9c8fa41bbb73375447066bb34e876cf388a6ed63c64

    SHA512

    b310ed4cd2e94381c00a6a370fcb7cc867ebe425d705b69caaaaffdafbab91f72d357966916053e72e68ecf712f2af7585500c58bb53ec3e1d539179fcb45fb4

  • \Users\Admin\AppData\Local\Temp\is-ERLSU.tmp\_isetup\_shfoldr.dll

    Filesize

    22KB

    MD5

    92dc6ef532fbb4a5c3201469a5b5eb63

    SHA1

    3e89ff837147c16b4e41c30d6c796374e0b8e62c

    SHA256

    9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

    SHA512

    9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

  • memory/1748-114-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-120-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-138-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-135-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-132-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-128-0x00000000021C0000-0x0000000002262000-memory.dmp

    Filesize

    648KB

  • memory/1748-127-0x00000000021C0000-0x0000000002262000-memory.dmp

    Filesize

    648KB

  • memory/1748-75-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-126-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-123-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-79-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-117-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-82-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-86-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-89-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-92-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-95-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-96-0x00000000021C0000-0x0000000002262000-memory.dmp

    Filesize

    648KB

  • memory/1748-102-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-105-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-108-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/1748-111-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/2032-77-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/2032-0-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/2032-3-0x0000000000401000-0x000000000040B000-memory.dmp

    Filesize

    40KB

  • memory/2160-83-0x00000000038F0000-0x0000000003BB3000-memory.dmp

    Filesize

    2.8MB

  • memory/2160-78-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/2160-17-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/2160-67-0x00000000038F0000-0x0000000003BB3000-memory.dmp

    Filesize

    2.8MB

  • memory/2480-73-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/2480-69-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB

  • memory/2480-68-0x0000000000400000-0x00000000006C3000-memory.dmp

    Filesize

    2.8MB