Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240611-en
  • resource tags

    arch:x64arch:x86image:win11-20240611-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    24-06-2024 17:37

General

  • Target

    cc4184ec0c2c4c3b4e27bf21e70e5221c47231a738ef41ce36f2c3be82020b92.exe

  • Size

    4.8MB

  • MD5

    dfc41cbfb77df408481362bcedae18b7

  • SHA1

    fd770ef87d169ce9cd0ebb84393638efd38341e4

  • SHA256

    cc4184ec0c2c4c3b4e27bf21e70e5221c47231a738ef41ce36f2c3be82020b92

  • SHA512

    b3e2011f420c571d515d1895ccd91bee934d1d0dcb86c97fe0626be987d17e86a735dba9a0ae3e86c096ac33864701f900862a8e48db0664e21e1dea3eea3cfa

  • SSDEEP

    98304:mxXSwhXGPiYwjB9gJK8wOPX2WpA4dJjz4OHcg0dAGIgFASjGR:QXXYAvPOOyAkBcOa+ngFYR

Malware Config

Extracted

Family

socks5systemz

C2

bfigujs.com

http://bfigujs.com/search/?q=67e28dd83d0ea428165baf167c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4ce8889b5e4fa9281ae978a371ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff613c5ef929b3f

http://bfigujs.com/search/?q=67e28dd83d0ea428165baf167c27d78406abdd88be4b12eab517aa5c96bd86ea92834496148ab2865b77f80ebad9c40f7cb63037ed2ab423a4664383ba915d911ec07bb606a0708727e40ea678c751bbe34efb0e2807e12571c17f3e83fe16c1e6979f3bca6e92

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\cc4184ec0c2c4c3b4e27bf21e70e5221c47231a738ef41ce36f2c3be82020b92.exe
    "C:\Users\Admin\AppData\Local\Temp\cc4184ec0c2c4c3b4e27bf21e70e5221c47231a738ef41ce36f2c3be82020b92.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1084
    • C:\Users\Admin\AppData\Local\Temp\is-LEE6D.tmp\cc4184ec0c2c4c3b4e27bf21e70e5221c47231a738ef41ce36f2c3be82020b92.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-LEE6D.tmp\cc4184ec0c2c4c3b4e27bf21e70e5221c47231a738ef41ce36f2c3be82020b92.tmp" /SL5="$40206,4740430,54272,C:\Users\Admin\AppData\Local\Temp\cc4184ec0c2c4c3b4e27bf21e70e5221c47231a738ef41ce36f2c3be82020b92.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:4896
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:3556
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:4564

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-LEE6D.tmp\cc4184ec0c2c4c3b4e27bf21e70e5221c47231a738ef41ce36f2c3be82020b92.tmp

    Filesize

    680KB

    MD5

    968239ff237206125fcefc6e1e18d1a1

    SHA1

    08e9029bfbe3fa982382a5a1fdf8a1e024d42e91

    SHA256

    ab87f9cbd0651077023497cdf3fbc62d9bdd85ab96b59a07c4ff1c246422e78b

    SHA512

    3eed5e98a25c63463490c693248408e0976b4973f454fae776d8087ec55a09fa7475056a7620c194f3d02055f06898b0504d12ec00b160f9b433796f55174674

  • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe

    Filesize

    2.8MB

    MD5

    bd12db646f3c62e2f25e9cfcc7d54989

    SHA1

    125734e5b82a9b21d47182698249d6c31608868c

    SHA256

    d1090936174a284b1ffc7bef1a8c14fe382948926586182154743dcfd90255c6

    SHA512

    36e7a084e33d8e026827533467dc68e94d441fa559fa02105b9264d3aeca6032ea5058e10996db9384bc3599e11498452b1855525cdbb83bbe833141adfa3c2d

  • memory/1084-69-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/1084-2-0x0000000000401000-0x000000000040B000-memory.dmp

    Filesize

    40KB

  • memory/1084-0-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/3556-59-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/3556-60-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/3556-65-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/3556-64-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-74-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-89-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-118-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-71-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-115-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-77-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-80-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-83-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-86-0x0000000000A30000-0x0000000000AD2000-memory.dmp

    Filesize

    648KB

  • memory/4564-68-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-94-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-97-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-100-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-103-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-106-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-109-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4564-111-0x0000000000A30000-0x0000000000AD2000-memory.dmp

    Filesize

    648KB

  • memory/4564-110-0x0000000000A30000-0x0000000000AD2000-memory.dmp

    Filesize

    648KB

  • memory/4896-16-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/4896-70-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB