Analysis

  • max time kernel
    146s
  • max time network
    149s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    09-06-2024 04:29

General

  • Target

    c617f96fa1a4855f1fa98176cad36cc4c38e28963324788230e1a9eaf97dc994.exe

  • Size

    4.6MB

  • MD5

    9a1cd03106b58e79be50e1e0367814c3

  • SHA1

    35de70ecfe06a3905eda04858116dc1401e8c382

  • SHA256

    c617f96fa1a4855f1fa98176cad36cc4c38e28963324788230e1a9eaf97dc994

  • SHA512

    c724c001470cb73379ff346fd2ef4e7146cd1beda9eec5eebc730f8e4cc9aca7f37362073a51c721024a8342057dec926959e6e1390460893425313b9a38615e

  • SSDEEP

    98304:mu/ugoYX+LmCIRcOTwprfpZDhEqLQ6IGdAHDYZWa6fgjytY8Og:R/ugoZmjcOTktl+qL3SHcZTcgl8Og

Malware Config

Extracted

Family

socks5systemz

C2

bgbkyjc.com

http://bgbkyjc.com/search/?q=67e28dd8645cf52d405fae1d7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a071ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff818c0e891983b

http://bgbkyjc.com/search/?q=67e28dd8645cf52d405fae1d7c27d78406abdd88be4b12eab517aa5c96bd86ec9d8f45895a8bbc896c58e713bc90c91936b5281fc235a925ed3e03d6bd974a95129070b616e96cc92be510b866db51b9e34eed4c2b14a82966836f23d7f210c7ee92933bca6b9416

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\c617f96fa1a4855f1fa98176cad36cc4c38e28963324788230e1a9eaf97dc994.exe
    "C:\Users\Admin\AppData\Local\Temp\c617f96fa1a4855f1fa98176cad36cc4c38e28963324788230e1a9eaf97dc994.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4792
    • C:\Users\Admin\AppData\Local\Temp\is-FC33O.tmp\c617f96fa1a4855f1fa98176cad36cc4c38e28963324788230e1a9eaf97dc994.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-FC33O.tmp\c617f96fa1a4855f1fa98176cad36cc4c38e28963324788230e1a9eaf97dc994.tmp" /SL5="$40244,4581277,54272,C:\Users\Admin\AppData\Local\Temp\c617f96fa1a4855f1fa98176cad36cc4c38e28963324788230e1a9eaf97dc994.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2684
      • C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
        "C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe" -i
        3⤵
        • Executes dropped EXE
        PID:2352
      • C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
        "C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe" -s
        3⤵
        • Executes dropped EXE
        PID:4652

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\is-FC33O.tmp\c617f96fa1a4855f1fa98176cad36cc4c38e28963324788230e1a9eaf97dc994.tmp
    Filesize

    680KB

    MD5

    e5c6fc27d2665f4ba98d9837652d4446

    SHA1

    68205e893b6b217a6b6beb921e758ee222fdd674

    SHA256

    b800a709dfe4e318a5160fda1fa01e2815e834bd6166e66cefa04298bce0cdbc

    SHA512

    f1989ea07a01b5696318e9d898f8ec4c10e846ab334ff053c58f00104a89804367f1ebd6c227033f3dd069ac311d0fe805694584e3a8152a8dc5eb23ae05dcbe

  • C:\Users\Admin\AppData\Local\Temp\is-S2VEV.tmp\_isetup\_iscrypt.dll
    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Virtual Sound Card\virtualsoundcard.exe
    Filesize

    2.6MB

    MD5

    8ce4111540411130233d63ca29c03d50

    SHA1

    d2a8711ae935250aefc156b7a6d2e9e2698b114a

    SHA256

    fb114d37e09d9f67d6760e46683b67f5aa0795a6c44fb38fdb654dd16c3f5d2a

    SHA512

    343ef30eb28c8f74ce3bcc7c1ea322fe6008e846bf808108c3b62142e5e6c6ed8460ebff06949e283e0339eff9debaa6c85b612d5749fd13554306cc345438ba

  • memory/2352-65-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/2352-59-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/2352-63-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/2352-62-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/2684-70-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/2684-16-0x0000000000400000-0x00000000004BA000-memory.dmp
    Filesize

    744KB

  • memory/4652-74-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-94-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-118-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-115-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-71-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-111-0x0000000002840000-0x00000000028E2000-memory.dmp
    Filesize

    648KB

  • memory/4652-77-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-80-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-83-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-86-0x0000000002840000-0x00000000028E2000-memory.dmp
    Filesize

    648KB

  • memory/4652-89-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-68-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-97-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-100-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-103-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-106-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-109-0x0000000000400000-0x00000000006A9000-memory.dmp
    Filesize

    2.7MB

  • memory/4652-110-0x0000000002840000-0x00000000028E2000-memory.dmp
    Filesize

    648KB

  • memory/4792-0-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB

  • memory/4792-2-0x0000000000401000-0x000000000040B000-memory.dmp
    Filesize

    40KB

  • memory/4792-69-0x0000000000400000-0x0000000000414000-memory.dmp
    Filesize

    80KB