Analysis

  • max time kernel
    141s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-06-2024 01:39

General

  • Target

    97f2f45e34af3ae26a7c14c51e111b48c98eef5a2bae1fafd45df5a0c3f46bee.exe

  • Size

    4.7MB

  • MD5

    e639f2fc1ae9d9fcf45b9689a17dc74f

  • SHA1

    45e340a5fc19cd6e52559d2e32feda26d2395ee7

  • SHA256

    97f2f45e34af3ae26a7c14c51e111b48c98eef5a2bae1fafd45df5a0c3f46bee

  • SHA512

    e60d68a4e4ffebc423af47506bc793f54ac39737f065e839a20d935e4556e616060a744e2fceca648a57c63a03ff7cf5020fa247deb6588ee1bdccaa3f71a7fe

  • SSDEEP

    98304:mPLOJy7HDtrWP4dAiMJvr2iBCoTyryphCWjk5vQaHjOJ6:OLOw7HD5WgZitphCsLaDOA

Malware Config

Extracted

Family

socks5systemz

C2

bvnbbxo.com

http://bvnbbxo.com/search/?q=67e28dd86b5bf57b435daf497c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa49e8889b5e4fa9281ae978f271ea771795af8e05c645db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ff819c9e8969b3b

http://bvnbbxo.com/search/?q=67e28dd86b5bf57b435daf497c27d78406abdd88be4b12eab517aa5c96bd86ef9d834b895a8bbc896c58e713bc90c91c36b5281fc235a925ed3e51d6bd974a95129070b616e96cc92be510b866db52b2e34aec4c2b14a82966836f23d7f210c7ee929232ca6c9716

Signatures

  • Detect Socks5Systemz Payload 3 IoCs
  • Socks5Systemz

    Socks5Systemz is a botnet written in C++.

  • Detects executables packed with VMProtect. 19 IoCs
  • 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\97f2f45e34af3ae26a7c14c51e111b48c98eef5a2bae1fafd45df5a0c3f46bee.exe
    "C:\Users\Admin\AppData\Local\Temp\97f2f45e34af3ae26a7c14c51e111b48c98eef5a2bae1fafd45df5a0c3f46bee.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2180
    • C:\Users\Admin\AppData\Local\Temp\is-8HH27.tmp\97f2f45e34af3ae26a7c14c51e111b48c98eef5a2bae1fafd45df5a0c3f46bee.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-8HH27.tmp\97f2f45e34af3ae26a7c14c51e111b48c98eef5a2bae1fafd45df5a0c3f46bee.tmp" /SL5="$B01CE,4661544,54272,C:\Users\Admin\AppData\Local\Temp\97f2f45e34af3ae26a7c14c51e111b48c98eef5a2bae1fafd45df5a0c3f46bee.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:3092
      • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
        "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:2028
      • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
        "C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:3076

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Lesser Extent\lesserextent32.exe
    Filesize

    2.8MB

    MD5

    a455bade05196fd3966098f2af5316c2

    SHA1

    b1d2c9d415e00044b29b00d8a2040a910dd20d1e

    SHA256

    743854e7a7adc9fa37567d6cae9bfc77ba31969c90411a15729bbc066a5f1d61

    SHA512

    cf14ad19a633fa457668a3be728dac1259f74d956d51971777f998ddb289b024c069b7560b9a746e794ce58e4befa2a43808f199e55a9f4f81e1f2a629da7a06

  • C:\Users\Admin\AppData\Local\Temp\is-5699D.tmp\_isetup\_iscrypt.dll
    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-8HH27.tmp\97f2f45e34af3ae26a7c14c51e111b48c98eef5a2bae1fafd45df5a0c3f46bee.tmp
    Filesize

    680KB

    MD5

    dff4f58a01a8e88e4a2f821ca761d901

    SHA1

    e67e24669220213f895b68c0d662b02b03469b4a

    SHA256

    91b049634c65dbe18368e1f2ead4ae48f62b92fdfcd119ccea0919b68bf56e76

    SHA512

    049cebaa8bc30f2b7b90a49f6022271247fab2a3bc0fd2e9f36d1f27e0c37926f00deedd92b5d85a8b34f2f6e9b59ee3b7e12510cfa720935a86ba820132817a

  • memory/2028-59-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/2028-64-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/2028-63-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/2028-60-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/2180-0-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/2180-2-0x0000000000401000-0x000000000040B000-memory.dmp
    Filesize

    40KB

  • memory/2180-68-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/3076-73-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-93-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-117-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-67-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-114-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-74-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-77-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-80-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-83-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-86-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-87-0x00000000009D0000-0x0000000000A72000-memory.dmp
    Filesize

    648KB

  • memory/3076-70-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-96-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-99-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-102-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-105-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-108-0x0000000000400000-0x00000000006C5000-memory.dmp
    Filesize

    2.8MB

  • memory/3076-109-0x00000000009D0000-0x0000000000A72000-memory.dmp
    Filesize

    648KB

  • memory/3076-110-0x00000000009D0000-0x0000000000A72000-memory.dmp
    Filesize

    648KB

  • memory/3092-10-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/3092-69-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB