Analysis

  • max time kernel
    79s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-01-2024 12:30

General

  • Target

    tmp.exe

  • Size

    1.1MB

  • MD5

    baa73a9b35bf02d8c56a1286bcd2d714

  • SHA1

    a179259548f9e81b65126130342f5b076c8b8a77

  • SHA256

    14490c9c139e9bc984781f8143a571e1f1f140c69a7cd12c34fc0bf20abb0889

  • SHA512

    02f75dafbd6cabc107fd681d0cc65991b0a21b16b713fba77db4928e78f1da23474ddb4535f8280dc56186da90e41adc7ad8b10ffde2d0b18ff494273021d644

  • SSDEEP

    12288:DCwHtUz0qTqcXrwV+XinIBLAx9gKupscZ0PpHTzY8QGWlCL8K7XLlq95ZPFdmUG/:DCwHybsV/IOv6scZ0BzUfCz3+zsw8YS

Malware Config

Extracted

Family

blacknet

Version

v3.7.0 Public

Botnet

HacKed

C2

http://190.123.44.240

Mutex

BN[]

Attributes
  • antivm

    false

  • elevate_uac

    false

  • install_name

    WindowsUpdate.exe

  • splitter

    |BN|

  • start_name

    e162b1333458a713bc6916cc8ac4110c

  • startup

    true

  • usb_spread

    false

Signatures

  • BlackNET

    BlackNET is an open source remote access tool written in VB.NET.

  • BlackNET payload 2 IoCs
  • Contains code to disable Windows Defender 2 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Detect ZGRat V1 34 IoCs
  • ZGRat

    ZGRat is remote access trojan written in C#.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Suspicious behavior: EnumeratesProcesses 44 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\tmp.exe
    "C:\Users\Admin\AppData\Local\Temp\tmp.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3936
    • C:\Users\Admin\AppData\Local\Temp\tmp.exe
      C:\Users\Admin\AppData\Local\Temp\tmp.exe
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2052
      • C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe"
        3⤵
        • Drops startup file
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2728
        • C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe
          4⤵
          • Executes dropped EXE
          PID:4056
        • C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:3356

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\tmp.exe.log

    Filesize

    927B

    MD5

    4a911455784f74e368a4c2c7876d76f4

    SHA1

    a1700a0849ffb4f26671eb76da2489946b821c34

    SHA256

    264098e15b5b33d425f3b76e45b7976b58f917048125041135f7e60d8151108c

    SHA512

    4617591400409e1930195795a55e20d5f063042bb3e9fd1955099066e507b6ac8a1e3ae54cc42418e2639149b31bf7e58cd5743670d9030a15e29f14d813815d

  • C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe

    Filesize

    1.1MB

    MD5

    baa73a9b35bf02d8c56a1286bcd2d714

    SHA1

    a179259548f9e81b65126130342f5b076c8b8a77

    SHA256

    14490c9c139e9bc984781f8143a571e1f1f140c69a7cd12c34fc0bf20abb0889

    SHA512

    02f75dafbd6cabc107fd681d0cc65991b0a21b16b713fba77db4928e78f1da23474ddb4535f8280dc56186da90e41adc7ad8b10ffde2d0b18ff494273021d644

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Sksewdjj.vbs

    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

  • memory/2052-951-0x00000000050A0000-0x000000000513C000-memory.dmp

    Filesize

    624KB

  • memory/2052-952-0x0000000005200000-0x0000000005292000-memory.dmp

    Filesize

    584KB

  • memory/2052-954-0x0000000005180000-0x000000000518A000-memory.dmp

    Filesize

    40KB

  • memory/2052-950-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB

  • memory/2052-948-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/2052-953-0x00000000051B0000-0x00000000051C0000-memory.dmp

    Filesize

    64KB

  • memory/2052-955-0x00000000053F0000-0x0000000005446000-memory.dmp

    Filesize

    344KB

  • memory/2052-956-0x00000000051B0000-0x00000000051C0000-memory.dmp

    Filesize

    64KB

  • memory/2052-977-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB

  • memory/2052-957-0x0000000008C10000-0x0000000008C76000-memory.dmp

    Filesize

    408KB

  • memory/2728-1915-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB

  • memory/2728-970-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB

  • memory/2728-972-0x0000000004FD0000-0x0000000004FE0000-memory.dmp

    Filesize

    64KB

  • memory/2728-1905-0x0000000005190000-0x0000000005191000-memory.dmp

    Filesize

    4KB

  • memory/2728-1906-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB

  • memory/2728-1907-0x0000000004FD0000-0x0000000004FE0000-memory.dmp

    Filesize

    64KB

  • memory/3356-1916-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB

  • memory/3356-1917-0x0000000005B60000-0x0000000005B70000-memory.dmp

    Filesize

    64KB

  • memory/3356-1918-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB

  • memory/3356-1919-0x0000000005B60000-0x0000000005B70000-memory.dmp

    Filesize

    64KB

  • memory/3356-1920-0x0000000005B60000-0x0000000005B70000-memory.dmp

    Filesize

    64KB

  • memory/3936-50-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-38-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-28-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-26-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-24-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-22-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-20-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-18-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-16-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-14-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-12-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-8-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-6-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-5-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-937-0x0000000004BE0000-0x0000000004BE1000-memory.dmp

    Filesize

    4KB

  • memory/3936-939-0x0000000004CC0000-0x0000000004D0C000-memory.dmp

    Filesize

    304KB

  • memory/3936-938-0x0000000004C50000-0x0000000004C86000-memory.dmp

    Filesize

    216KB

  • memory/3936-940-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB

  • memory/3936-941-0x0000000004A40000-0x0000000004A50000-memory.dmp

    Filesize

    64KB

  • memory/3936-942-0x0000000005670000-0x0000000005C14000-memory.dmp

    Filesize

    5.6MB

  • memory/3936-34-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-36-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-949-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB

  • memory/3936-30-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-40-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-42-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-46-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-48-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-0-0x00000000000E0000-0x0000000000208000-memory.dmp

    Filesize

    1.2MB

  • memory/3936-52-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-54-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-56-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-60-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-68-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-64-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-66-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-62-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-58-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-44-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-32-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-10-0x0000000004B10000-0x0000000004BA9000-memory.dmp

    Filesize

    612KB

  • memory/3936-3-0x0000000004A50000-0x0000000004AEE000-memory.dmp

    Filesize

    632KB

  • memory/3936-4-0x0000000004B10000-0x0000000004BAE000-memory.dmp

    Filesize

    632KB

  • memory/3936-2-0x0000000004A40000-0x0000000004A50000-memory.dmp

    Filesize

    64KB

  • memory/3936-1-0x0000000074870000-0x0000000075020000-memory.dmp

    Filesize

    7.7MB