Analysis

  • max time kernel
    76s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-02-2024 06:23

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 4 IoCs
  • Contains code to disable Windows Defender 4 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:3824
    • 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:4212
      • 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:3364
        • C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe
          C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe
          4⤵
          • Executes dropped EXE
          PID:3804
        • 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:216

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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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\MyClient\WindowsUpdate.exe

    Filesize

    1024KB

    MD5

    57278d16a710b0d13c4e44e84497a49a

    SHA1

    6e6d356b0f9a6fd86fb2570d9ecee28950e0e702

    SHA256

    c26653f367c5860e61d50638b5588eb7638575f7aec615f2feb5476287bc42fd

    SHA512

    9f52dc5d5ecadc00d662c6b056b86adafb05c19a94ffc2f2cb50f3a6ed9c14645d31da474523c19654aa3f9ad05c5fb6544960987f07e74e3db187023470e002

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

    Filesize

    490KB

    MD5

    27b125495a8099f1d80993761fea4e96

    SHA1

    44910857bfb74af00cc4e13bb189e82eb6c7fa62

    SHA256

    8b38a85026efc691fa07e93275b1dd1ee26c371a4eed880698724145875b9c13

    SHA512

    b3dc31f841e8f11996adab827bfeafb82ade8e697472b39be65df1dba900391a70c2ed3c8772505cd1542eef5635db5f8eb46d6128fd21d82d16c5db75e78eb3

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

    Filesize

    698KB

    MD5

    eb5af623d2ef2b422de14ed45c36fe7b

    SHA1

    258aab10a6523db7292ac8835802d26b765d33ff

    SHA256

    f2d36f22f2d1809ce87c08718f4c7343caddad74f2eb6b4ad807522ee8a40099

    SHA512

    b4101a65e8907888e3f35a0acbac03a566686af2b3567203a76390f534b50cd43dfd19551eb3e8f82a3464a5b398e478a7dc511c43853bbf76c3ada424b5dae1

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

    MD5

    d41d8cd98f00b204e9800998ecf8427e

    SHA1

    da39a3ee5e6b4b0d3255bfef95601890afd80709

    SHA256

    e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

    SHA512

    cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

  • memory/216-1916-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB

  • memory/216-1920-0x0000000005760000-0x0000000005770000-memory.dmp

    Filesize

    64KB

  • memory/216-1917-0x0000000005760000-0x0000000005770000-memory.dmp

    Filesize

    64KB

  • memory/216-1921-0x0000000005760000-0x0000000005770000-memory.dmp

    Filesize

    64KB

  • memory/216-1918-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB

  • memory/216-1919-0x0000000005760000-0x0000000005770000-memory.dmp

    Filesize

    64KB

  • memory/3364-1915-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB

  • memory/3364-1907-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB

  • memory/3364-1906-0x0000000005120000-0x0000000005121000-memory.dmp

    Filesize

    4KB

  • memory/3364-971-0x0000000002970000-0x0000000002980000-memory.dmp

    Filesize

    64KB

  • memory/3364-970-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB

  • memory/3824-6-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-948-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB

  • memory/3824-58-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-56-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-54-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-48-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-40-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-38-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-36-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-34-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-32-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-28-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-26-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-24-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-22-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-20-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-16-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-14-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-12-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-0-0x0000000000090000-0x00000000001B8000-memory.dmp

    Filesize

    1.2MB

  • memory/3824-5-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-937-0x0000000004B90000-0x0000000004B91000-memory.dmp

    Filesize

    4KB

  • memory/3824-939-0x0000000004D70000-0x0000000004DBC000-memory.dmp

    Filesize

    304KB

  • memory/3824-938-0x0000000004D00000-0x0000000004D36000-memory.dmp

    Filesize

    216KB

  • memory/3824-940-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB

  • memory/3824-941-0x0000000004A30000-0x0000000004A40000-memory.dmp

    Filesize

    64KB

  • memory/3824-942-0x0000000005720000-0x0000000005CC4000-memory.dmp

    Filesize

    5.6MB

  • memory/3824-60-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-1-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB

  • memory/3824-2-0x0000000004A30000-0x0000000004A40000-memory.dmp

    Filesize

    64KB

  • memory/3824-3-0x0000000004A40000-0x0000000004ADE000-memory.dmp

    Filesize

    632KB

  • memory/3824-4-0x0000000004AE0000-0x0000000004B7E000-memory.dmp

    Filesize

    632KB

  • memory/3824-8-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-10-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-18-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-30-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-42-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-46-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-64-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-66-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-68-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-62-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-52-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-44-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/3824-50-0x0000000004AE0000-0x0000000004B79000-memory.dmp

    Filesize

    612KB

  • memory/4212-981-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB

  • memory/4212-957-0x00000000094B0000-0x0000000009516000-memory.dmp

    Filesize

    408KB

  • memory/4212-956-0x0000000005A80000-0x0000000005A90000-memory.dmp

    Filesize

    64KB

  • memory/4212-955-0x0000000005A80000-0x0000000005A90000-memory.dmp

    Filesize

    64KB

  • memory/4212-953-0x0000000005A20000-0x0000000005A2A000-memory.dmp

    Filesize

    40KB

  • memory/4212-954-0x0000000005CA0000-0x0000000005CF6000-memory.dmp

    Filesize

    344KB

  • memory/4212-952-0x0000000005A80000-0x0000000005A90000-memory.dmp

    Filesize

    64KB

  • memory/4212-951-0x0000000005AB0000-0x0000000005B42000-memory.dmp

    Filesize

    584KB

  • memory/4212-950-0x0000000005930000-0x00000000059CC000-memory.dmp

    Filesize

    624KB

  • memory/4212-949-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/4212-947-0x00000000748D0000-0x0000000075080000-memory.dmp

    Filesize

    7.7MB