Analysis

  • max time kernel
    142s
  • max time network
    142s
  • 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 18:45

General

  • Target

    61e56decd39164744b6732251886da4865c32d5713d0303ce69d21f02859790b.exe

  • Size

    4.8MB

  • MD5

    5564d28c046464259ce7405f443b89a4

  • SHA1

    2daf044161779f2440fc8e0450bf0f212c458546

  • SHA256

    61e56decd39164744b6732251886da4865c32d5713d0303ce69d21f02859790b

  • SHA512

    5142fc81bb306aad6db9e5cc6e6950c272f118c3e621770ca60a74432879f9f07fa483db016d32fe39629e1cf797af017261e6b0647ea0fb9255a17f81c0eb98

  • SSDEEP

    98304:mIZCVoojx1KD0O9G4XrGyB1KQd3bYP/I/z7wGMPM7oakvnnQK1i:zCV9lE0O913R0P/YkGMUlkvQ6i

Malware Config

Extracted

Family

socks5systemz

C2

bfcgauv.com

http://bfcgauv.com/search/?q=67e28dd86459a42c4009ab4e7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978f171ea771795af8e05c645db22f31dfe339426fa12a466c553adb719a9577e55b8603e983a608ff613c5eb9d9b3d

http://bfcgauv.com/search/?q=67e28dd86459a42c4009ab4e7c27d78406abdd88be4b12eab517aa5c96bd86ea93834896148ab2865b77f80ebad9c50f7cb63037ed2ab423a4344383ba915d911ec07bb606a0708727e40ea678c751bbe34efb0e2807e12571c17f3e83fe16c1e6979f3fc56e90

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\61e56decd39164744b6732251886da4865c32d5713d0303ce69d21f02859790b.exe
    "C:\Users\Admin\AppData\Local\Temp\61e56decd39164744b6732251886da4865c32d5713d0303ce69d21f02859790b.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1444
    • C:\Users\Admin\AppData\Local\Temp\is-RKS70.tmp\61e56decd39164744b6732251886da4865c32d5713d0303ce69d21f02859790b.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-RKS70.tmp\61e56decd39164744b6732251886da4865c32d5713d0303ce69d21f02859790b.tmp" /SL5="$B006E,4763677,54272,C:\Users\Admin\AppData\Local\Temp\61e56decd39164744b6732251886da4865c32d5713d0303ce69d21f02859790b.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:4988
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -i
        3⤵
        • Executes dropped EXE
        PID:2948
      • C:\Users\Admin\AppData\Local\Winypux\winypux32.exe
        "C:\Users\Admin\AppData\Local\Winypux\winypux32.exe" -s
        3⤵
        • Executes dropped EXE
        PID:1356

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\is-97KIE.tmp\_isetup\_iscrypt.dll

    Filesize

    2KB

    MD5

    a69559718ab506675e907fe49deb71e9

    SHA1

    bc8f404ffdb1960b50c12ff9413c893b56f2e36f

    SHA256

    2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

    SHA512

    e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

  • C:\Users\Admin\AppData\Local\Temp\is-RKS70.tmp\61e56decd39164744b6732251886da4865c32d5713d0303ce69d21f02859790b.tmp

    Filesize

    680KB

    MD5

    ee6bb54f61abc5841cec671dbc2048b7

    SHA1

    336daad05b759a53ca82410918ad3a3e6140ac03

    SHA256

    e53d361f625cfd3769377684d87473d9ce687654f018caf64fd67c4bf881c8d5

    SHA512

    5bf7399be57cab50c20e691915494a9bbb43e5c03e7b6891ef5b42e27a105900f4481a2bad3232441871e0940fd9c17a039f2e76f2c6140f26da4df73bfbaacd

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

    Filesize

    2.8MB

    MD5

    782c72372522d8c70bfacfc6ea168f5e

    SHA1

    dcb5f82f083a08eb248937937c8df2792c9536e4

    SHA256

    5b97a641e288c49101fcb40959a72c7bfc5105e65a204165bc3c3fc00ad9b496

    SHA512

    4f4c657f239ce605083287c14fe0f16d87457240434022860cb85d573c7c269a290aa1b63dd84e3b76d28a9039b8b18c5c13aba1b2cd70f40ab3be92123829ab

  • memory/1356-99-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-102-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-82-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-79-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-116-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-115-0x00000000009D0000-0x0000000000A72000-memory.dmp

    Filesize

    648KB

  • memory/1356-114-0x00000000009D0000-0x0000000000A72000-memory.dmp

    Filesize

    648KB

  • memory/1356-67-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-69-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-111-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-108-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-72-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-75-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-76-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-120-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-105-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-85-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-88-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-89-0x00000000009D0000-0x0000000000A72000-memory.dmp

    Filesize

    648KB

  • memory/1356-95-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1356-98-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/1444-0-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/1444-2-0x0000000000401000-0x000000000040B000-memory.dmp

    Filesize

    40KB

  • memory/1444-70-0x0000000000400000-0x0000000000414000-memory.dmp

    Filesize

    80KB

  • memory/2948-63-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2948-60-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2948-65-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/2948-59-0x0000000000400000-0x00000000006C8000-memory.dmp

    Filesize

    2.8MB

  • memory/4988-13-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB

  • memory/4988-71-0x0000000000400000-0x00000000004BA000-memory.dmp

    Filesize

    744KB