Analysis

  • max time kernel
    146s
  • max time network
    156s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    30-05-2024 22:25

General

  • Target

    efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe

  • Size

    5.5MB

  • MD5

    be8a94bb2f3ecd49e327ae7c3c6cf3dd

  • SHA1

    de998d83fc381d8b351a9dec0950021c887a327b

  • SHA256

    efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2

  • SHA512

    26021f40144360d705382039a9a659d27b1fd36770788cbfff8286a6b1ff468b58ad53a128bad323ee7f443d85d56337f4bfcad94ced9368a4c9b8c186d33a62

  • SSDEEP

    98304:m4MNANOeGxSe0pDIoBYayQrLb6C+A+THETp+GdFFPRbFXAyLrFU4WK7sy022Qy3:LyANsxSjMbXQrLmA0HE44FJ5QOJU4WK4

Malware Config

Signatures

  • Detect Socks5Systemz Payload 1 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 FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe
    "C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4852
    • C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp" /SL5="$40208,5552432,54272,C:\Users\Admin\AppData\Local\Temp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:864
      • C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
        "C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:1076
      • C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe
        "C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:4916

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\5K Player\5kplayer32.exe

    Filesize

    3.3MB

    MD5

    faab2e87fa17725a687300a1e0c1ae26

    SHA1

    45f7128cdab20c1ab7d34e3f54374eae838a05e7

    SHA256

    6d345036ec98aaffdff6b071e097018b576ff81e767533816b4de9adfcc7f57a

    SHA512

    a99e4428c58f47963b9e4265dd6516aece4387ac23839bb02ac308c437177e2fc551fa877c321654c9ff02d8612e31ff525fb91cfbf6b048296e312001dd7038

  • C:\Users\Admin\AppData\Local\Temp\is-6G4VF.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-6G4VF.tmp\_isetup\_isdecmp.dll

    Filesize

    32KB

    MD5

    b6f11a0ab7715f570f45900a1fe84732

    SHA1

    77b1201e535445af5ea94c1b03c0a1c34d67a77b

    SHA256

    e47dd306a9854599f02bc1b07ca6dfbd5220f8a1352faa9616d1a327de0bbf67

    SHA512

    78a757e67d21eb7cc95954df15e3eeff56113d6b40fb73f0c5f53304265cc52c79125d6f1b3655b64f9a411711b5b70f746080d708d7c222f4e65bad64b1b771

  • C:\Users\Admin\AppData\Local\Temp\is-RH0KM.tmp\efb45c44b94103d74d36fce390231dea9c0a001ca181f9cba1f267b3e22757d2.tmp

    Filesize

    680KB

    MD5

    ef9105d68de970efad785e01b21e4e2b

    SHA1

    7fe8801a3e86814972da63a7a943bdc5e31d8888

    SHA256

    381198ca0669ab760f6f9b84e39c39ab5e870f65d17d03ed0dc572a1c602364a

    SHA512

    e388cbf32a4d833c0e4c6c1a129515b4d12eac5b333f2aec39e741d3a0da856c5923d47cf4d3083ad030f7f07b9214261b2b9119720920dd42929eeb617e779c

  • memory/864-77-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/864-22-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/1076-66-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/1076-65-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/1076-68-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/1076-71-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4852-76-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4852-0-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/4852-2-0x0000000000401000-0x000000000040B000-memory.dmp

    Filesize

    40KB

  • memory/4916-88-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-97-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-78-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-81-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-82-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-85-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-75-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-91-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-94-0x0000000000B40000-0x0000000000BE2000-memory.dmp

    Filesize

    648KB

  • memory/4916-74-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-102-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-105-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-108-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-111-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-114-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-117-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-120-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB

  • memory/4916-123-0x0000000000400000-0x0000000000745000-memory.dmp

    Filesize

    3.3MB