Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21/06/2024, 07:32

General

  • Target
    6a6d0f3360ddc75cdb0543b323ec40e7dfbaa178271104d5a83fc7389afde662.exe
  • Size 4.4MB
  • Sample240621-jcy6vsvfkn
  • SHA256 6a6d0f3360ddc75cdb0543b323ec40e7dfbaa178271104d5a83fc7389afde662
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • socks5systemz

C2
  • cedmtdq.net

  • http://cedmtdq.net/search/?q=67e28dd86f59a17b435afa187c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4fe8889b5e4fa9281ae978a271ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff718c5ea94933a

  • http://cedmtdq.net/search/?q=67e28dd86f59a17b435afa187c27d78406abdd88be4b12eab517aa5c96bd86ec958349865a8bbc896c58e713bc90c91a36b5281fc235a925ed3e01d6bd974a95129070b616e96cc92be510b866db51b9e34eed4c2b14a82966836f23d7f210c7ee9d933ec86e9f17

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 FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6a6d0f3360ddc75cdb0543b323ec40e7dfbaa178271104d5a83fc7389afde662.exe
    "C:\Users\Admin\AppData\Local\Temp\6a6d0f3360ddc75cdb0543b323ec40e7dfbaa178271104d5a83fc7389afde662.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2012
    • C:\Users\Admin\AppData\Local\Temp\is-O961P.tmp\6a6d0f3360ddc75cdb0543b323ec40e7dfbaa178271104d5a83fc7389afde662.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-O961P.tmp\6a6d0f3360ddc75cdb0543b323ec40e7dfbaa178271104d5a83fc7389afde662.tmp" /SL5="$60052,4408200,54272,C:\Users\Admin\AppData\Local\Temp\6a6d0f3360ddc75cdb0543b323ec40e7dfbaa178271104d5a83fc7389afde662.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:1784
      • C:\Users\Admin\AppData\Local\Dibelius\dibelius.exe
        "C:\Users\Admin\AppData\Local\Dibelius\dibelius.exe" -i
        3⤵
        • Executes dropped EXE
        PID:408
      • C:\Users\Admin\AppData\Local\Dibelius\dibelius.exe
        "C:\Users\Admin\AppData\Local\Dibelius\dibelius.exe" -s
        3⤵
        • Executes dropped EXE
        PID:1364

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        dibelius.exe

        • Path C:\Users\Admin\AppData\Local\Dibelius\dibelius.exe
        • Size 2.4MB
        • SHA256 d33398d2398ebe9f6b422a2b75f30b2a2e7c5a21cb53473f341fb62ac501e780
        • MD5 SHA1 SHA512 SSDEEP

        _iscrypt.dll

        • Path C:\Users\Admin\AppData\Local\Temp\is-L26H1.tmp\_isetup\_iscrypt.dll
        • Size 2KB
        • SHA256 2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc
        • MD5 SHA1 SHA512

        6a6d0f3360ddc75cdb0543b323ec40e7dfbaa178271104d5a83fc7389afde662.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\is-O961P.tmp\6a6d0f3360ddc75cdb0543b323ec40e7dfbaa178271104d5a83fc7389afde662.tmp
        • Size 680KB
        • SHA256 e73278ea0012d24bab63a63478ce094dbc21149d446370feb51e070cea45f0fe
        • MD5 SHA1 SHA512 SSDEEP

        memory/408-60-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/408-64-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/408-63-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/408-59-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-73-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-83-0x00000000028B0000-0x0000000002952000-memory.dmp

        memory/1364-116-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-67-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-113-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-109-0x00000000028B0000-0x0000000002952000-memory.dmp

        memory/1364-70-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-108-0x00000000028B0000-0x0000000002952000-memory.dmp

        memory/1364-76-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-79-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-82-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-107-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-87-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-92-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-95-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-98-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-101-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1364-104-0x0000000000400000-0x0000000000661000-memory.dmp

        memory/1784-13-0x0000000000400000-0x00000000004BA000-memory.dmp

        memory/1784-69-0x0000000000400000-0x00000000004BA000-memory.dmp

        memory/2012-0-0x0000000000400000-0x0000000000414000-memory.dmp

        memory/2012-68-0x0000000000400000-0x0000000000414000-memory.dmp

        memory/2012-2-0x0000000000401000-0x000000000040B000-memory.dmp