Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/03/2024, 09:39

General

  • Target

    b42c724af5c05849434bb0c34cabbd138201a7f6b6b56faadbc150885cfd0a2e.exe

  • Size

    2.0MB

  • MD5

    c0936b0b60581abf999cb8db58c887d6

  • SHA1

    b6817af3e994b051935cfa2bdb7de674c5f7f949

  • SHA256

    b42c724af5c05849434bb0c34cabbd138201a7f6b6b56faadbc150885cfd0a2e

  • SHA512

    117d8f65c863db9c6514d17fff354a65c1faaee582fe630fb7713ae7f9cbc969013f0c17fe01fc763f0f42b3f090021fdca16672cde26a17038ba1b36584e094

  • SSDEEP

    49152:32mReh8xhZ4DirVux6pKP79FS+iZM95cALWatNiCtQUOK+oR98:mmQab4Dq84oR0+4MQGHcWQqHR6

Malware Config

Extracted

Family

socks5systemz

C2

http://aixkcbe.ru/search/?q=67e28dd86e58a42e450ca94d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ee8889b5e4fa9281ae978f671ea771795af8e05c642db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ffe10c8e99d9f3c

Signatures

  • Detect Socks5Systemz Payload 3 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 3 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\b42c724af5c05849434bb0c34cabbd138201a7f6b6b56faadbc150885cfd0a2e.exe
    "C:\Users\Admin\AppData\Local\Temp\b42c724af5c05849434bb0c34cabbd138201a7f6b6b56faadbc150885cfd0a2e.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:5060
    • C:\Users\Admin\AppData\Local\Temp\is-E83K4.tmp\b42c724af5c05849434bb0c34cabbd138201a7f6b6b56faadbc150885cfd0a2e.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-E83K4.tmp\b42c724af5c05849434bb0c34cabbd138201a7f6b6b56faadbc150885cfd0a2e.tmp" /SL5="$B0050,1722205,54272,C:\Users\Admin\AppData\Local\Temp\b42c724af5c05849434bb0c34cabbd138201a7f6b6b56faadbc150885cfd0a2e.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:944
      • C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe
        "C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:3848
      • C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe
        "C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:1192

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\MarkDownPad\markdownpad32.exe

          Filesize

          1.8MB

          MD5

          e1377c17e6c6bf04ead10fc76a847e2a

          SHA1

          1963ab0f5faca44637fd0fe8b1041c763bceebb1

          SHA256

          a52e5779bec20092f903389069e5ba5c6060987e255b203b6b0d9d5ac791296b

          SHA512

          9bc7d2fac768d4472b0629ae6ed308663b9902a486a9022f1f3a6c4bc09793c639a8e51968baf07d835592e156adbecee6bd705b1289dd0885c1665c761d8808

        • C:\Users\Admin\AppData\Local\Temp\is-7LSAH.tmp\_isetup\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • C:\Users\Admin\AppData\Local\Temp\is-7LSAH.tmp\_isetup\_isdecmp.dll

          Filesize

          32KB

          MD5

          b6f11a0ab7715f570f45900a1fe84732

          SHA1

          77b1201e535445af5ea94c1b03c0a1c34d67a77b

          SHA256

          e47dd306a9854599f02bc1b07ca6dfbd5220f8a1352faa9616d1a327de0bbf67

          SHA512

          78a757e67d21eb7cc95954df15e3eeff56113d6b40fb73f0c5f53304265cc52c79125d6f1b3655b64f9a411711b5b70f746080d708d7c222f4e65bad64b1b771

        • C:\Users\Admin\AppData\Local\Temp\is-E83K4.tmp\b42c724af5c05849434bb0c34cabbd138201a7f6b6b56faadbc150885cfd0a2e.tmp

          Filesize

          677KB

          MD5

          88d7ea648defbc2597fa38ef83112eda

          SHA1

          2bce9acfb1b5e08dc29c695eff12fc80949c6440

          SHA256

          5a53b8bd78b1bbf24136b4d8d8191f503abcc24934626ed6f15bf9f6dee17b68

          SHA512

          050ce971e1f7a4e92d272c9c3c9f96f1214286523b018a75084c76dbebb5f32a717afbd9af9c68b7ad71f738c0a331640a8fe765cb4def90678eae4769b2e66a

        • memory/944-53-0x0000000000400000-0x00000000004B8000-memory.dmp

          Filesize

          736KB

        • memory/944-6-0x0000000002340000-0x0000000002341000-memory.dmp

          Filesize

          4KB

        • memory/944-55-0x0000000002340000-0x0000000002341000-memory.dmp

          Filesize

          4KB

        • memory/1192-82-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-86-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-102-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-51-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-99-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-95-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-54-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-92-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-58-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-59-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-62-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-65-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-68-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-71-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-73-0x0000000000830000-0x00000000008D2000-memory.dmp

          Filesize

          648KB

        • memory/1192-72-0x0000000000830000-0x00000000008D2000-memory.dmp

          Filesize

          648KB

        • memory/1192-79-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-89-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/1192-83-0x0000000000830000-0x00000000008D2000-memory.dmp

          Filesize

          648KB

        • memory/3848-48-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/3848-43-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/3848-44-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/3848-45-0x0000000000400000-0x00000000005D4000-memory.dmp

          Filesize

          1.8MB

        • memory/5060-0-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB

        • memory/5060-52-0x0000000000400000-0x0000000000414000-memory.dmp

          Filesize

          80KB