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
    03/08/2024, 00:31

General

  • Target

    54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe

  • Size

    4.0MB

  • MD5

    2effdd07d1b96669ea81f699672c5f09

  • SHA1

    bfc86d7a502a0e639816f95951eadd9288094b4d

  • SHA256

    54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926

  • SHA512

    18c9a3403c53f1278f6919d6d6a193f4c345df1e7ed8ba1808b89c3b9eeec11bb087dc8a8918f415a7f950d11df9845fee1cfd7ea8852fcd2c3c70ca4e97202f

  • SSDEEP

    98304:NPdKgnV4cxmxN0ex4Us4Tdl3ggmghX6nUERRld2KKlitUnidK:NycQf4Us4rrmghKn/loKK1ni4

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\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe
    "C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:976
    • C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp" /SL5="$6005C,3980347,54272,C:\Users\Admin\AppData\Local\Temp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.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:4744
      • C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
        "C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe" -i
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1092
      • C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe
        "C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe" -s
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:2884

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\AC3Filter\ac3filter32_64.exe

          Filesize

          4.7MB

          MD5

          7b8d8edb2ea6f085c3f7fd8f205d1977

          SHA1

          39d411ef00df5ba7795796f06b6971961d1e9220

          SHA256

          3b045b1123c3ae4c103217f218f1f218a21ed7e0a118616d8374738c970c31cf

          SHA512

          42b235b2b9ec77be8d47414b8cd69e51c264bfaa88258be3a14e98eab17c0e18217a07816f706b0a7cf82f0a77fc58507c75e8470054dbe3cc085a2e39a9ce84

        • C:\Users\Admin\AppData\Local\Temp\is-1MVQ9.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-46BIS.tmp\54a5a788f5f9943f4734b0cf9e499d6d6cf9c0ba0df3c63a8eec9195431b2926.tmp

          Filesize

          692KB

          MD5

          849bb5c3439284a175f581ec281ca92e

          SHA1

          8bd0737eac1a74de4d62d66911ca7ed9f61cbc0f

          SHA256

          33a8f60e50240aecdbedc45922032025376ecccc0c1acbd44c82f12985e82206

          SHA512

          ac7bd629b6ed2595c6af4ef0737d7d801c8c35ebb4638ec2c19569511157a1543a6fa91d1a15708810865ece1cfb27367480754a7debf716d322d1eb59c5f625

        • memory/976-62-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/976-2-0x0000000000401000-0x000000000040B000-memory.dmp

          Filesize

          40KB

        • memory/976-1-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/1092-67-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/1092-53-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/1092-52-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/1092-56-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/1092-57-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-64-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-78-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-111-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-60-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-108-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-68-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-69-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-72-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-75-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-61-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-81-0x0000000000C60000-0x0000000000D02000-memory.dmp

          Filesize

          648KB

        • memory/2884-84-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-89-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-92-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-95-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-98-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-101-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/2884-104-0x0000000000400000-0x00000000008B2000-memory.dmp

          Filesize

          4.7MB

        • memory/4744-12-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB

        • memory/4744-63-0x0000000000400000-0x00000000004BD000-memory.dmp

          Filesize

          756KB