Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    24/03/2024, 15:58

General

  • Target

    d9a7370921b5ed2e87a080854cf2ca8e6d30cfe27cdc1bb8f6eece855f5e812e.exe

  • Size

    2.0MB

  • MD5

    57f7f1e073a884db20e53a168daad39d

  • SHA1

    492d6489dd440517435292026a8c6b4aba70a741

  • SHA256

    d9a7370921b5ed2e87a080854cf2ca8e6d30cfe27cdc1bb8f6eece855f5e812e

  • SHA512

    2b3c66e05642dbf4382b693ac331554334b89646d7e90705290935809ef4cd66266d17b8f448be399fb2dfd7528a701a48cfadacb361767742815a9ddacd50a2

  • SSDEEP

    49152:32ia2PZoSX83mUegJJ7GIuw4xF4qe02iIltGqI:mj8ow8PLUJ4E2isGqI

Malware Config

Extracted

Family

socks5systemz

C2

http://aifubhe.ru/search/?q=67e28dd83e5cf579400faa1d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a471ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ffe13c9ea9c9c3c

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.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d9a7370921b5ed2e87a080854cf2ca8e6d30cfe27cdc1bb8f6eece855f5e812e.exe
    "C:\Users\Admin\AppData\Local\Temp\d9a7370921b5ed2e87a080854cf2ca8e6d30cfe27cdc1bb8f6eece855f5e812e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4280
    • C:\Users\Admin\AppData\Local\Temp\is-4S4SO.tmp\d9a7370921b5ed2e87a080854cf2ca8e6d30cfe27cdc1bb8f6eece855f5e812e.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-4S4SO.tmp\d9a7370921b5ed2e87a080854cf2ca8e6d30cfe27cdc1bb8f6eece855f5e812e.tmp" /SL5="$60234,1764583,54272,C:\Users\Admin\AppData\Local\Temp\d9a7370921b5ed2e87a080854cf2ca8e6d30cfe27cdc1bb8f6eece855f5e812e.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:1052
      • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
        "C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -i
        3⤵
        • Executes dropped EXE
        PID:4576
      • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe
        "C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe" -s
        3⤵
        • Executes dropped EXE
        PID:4912

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

          Filesize

          384KB

          MD5

          194f6aae7f1a7d6128740d6ab6ede9e6

          SHA1

          b4eb16213efd1cf14266fa8f47f8537a4c7bf714

          SHA256

          443683ca4533dd57b7bd903d7811cd98f9aa5b5b8e57e49246c680bf67d76413

          SHA512

          3fed8311891b6fe512a676af869d9ba9f10325357273bcef0f839e61a0c320d4bceea37fa9a6836eff50a9d1d990a50467a198077f038ce70bd62e22aa165a11

        • C:\Users\Admin\AppData\Local\Site Free Edition\sitefreeedition.exe

          Filesize

          2.0MB

          MD5

          1e417394236de4c786e9286a9de071bd

          SHA1

          a58188b5dd42e3e31e98be1eac5338f845d88f20

          SHA256

          83d854c33193232eda4a8f8c06a9b304a57597abecdf07b72153bf1cc7dc9bef

          SHA512

          598160bee4ca7cbe0e50087ca4a7154bf3d852f2de8faccca927c0cf87a5f87bb68d4bcc99cc96fa5da2c5f2397a6ae9b19e3e5386d872e92af6e99cb640c48c

        • C:\Users\Admin\AppData\Local\Temp\is-4S4SO.tmp\d9a7370921b5ed2e87a080854cf2ca8e6d30cfe27cdc1bb8f6eece855f5e812e.tmp

          Filesize

          677KB

          MD5

          5a1e3d46cb5a24f8e50b2a59d2ba1cf3

          SHA1

          fe86894c4757c144449bc744649b7fb9e03346f1

          SHA256

          d3a2c2ce7d70b3b9c30faf3f72bf4ebcdea8f331d6b6cac5dae906327997985d

          SHA512

          a27dc5c443abb31826b14e514aa717be5bf0f548b82170f79705f45ca28abaedc485c5b8738044735f61eca9e1f0ca659b519a3947551404085d07202ae709af

        • C:\Users\Admin\AppData\Local\Temp\is-HN9G0.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • memory/1052-51-0x0000000002300000-0x0000000002301000-memory.dmp

          Filesize

          4KB

        • memory/1052-7-0x0000000002300000-0x0000000002301000-memory.dmp

          Filesize

          4KB

        • memory/1052-49-0x0000000000400000-0x00000000004B8000-memory.dmp

          Filesize

          736KB

        • memory/4280-0-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4280-2-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4280-48-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/4576-38-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4576-39-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4576-43-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4576-42-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4576-54-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-56-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-71-0x0000000002380000-0x0000000002422000-memory.dmp

          Filesize

          648KB

        • memory/4912-47-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-55-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-45-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-59-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-62-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-65-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-68-0x0000000002380000-0x0000000002422000-memory.dmp

          Filesize

          648KB

        • memory/4912-50-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-69-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-76-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-79-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-80-0x0000000002380000-0x0000000002422000-memory.dmp

          Filesize

          648KB

        • memory/4912-83-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-86-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-89-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-92-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-96-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB

        • memory/4912-99-0x0000000000400000-0x000000000060E000-memory.dmp

          Filesize

          2.1MB