Analysis

  • max time kernel
    34s
  • max time network
    46s
  • platform
    windows7_x64
  • resource
    win7-20220331-en
  • submitted
    08-04-2022 13:18

General

  • Target

    b33d569af5e490875d6473c6402797ddb4ce639bb1f1cf7f67698eeafa625f09.exe

  • Size

    131KB

  • MD5

    c4f79edc4498c5570495bb36fc942134

  • SHA1

    00046b588252502480e8e708a22d25ae1d9b05fa

  • SHA256

    b33d569af5e490875d6473c6402797ddb4ce639bb1f1cf7f67698eeafa625f09

  • SHA512

    07bdeb39b35835a752886c2d308a68d263b36e8372d2bf320ede5b85252d14e284985d0889dfa9fcffec7ede7c3585a46cb0165b00be903755ffe63cacb21cef

Malware Config

Extracted

Family

blacknet

Version

v3.5 Public

Botnet

HacKed

C2

http://finalb.xyz/NiggaNet

Mutex

BN[RqfcWolJ-7232457]

Attributes
  • antivm

    true

  • elevate_uac

    false

  • install_name

    WindowsUpdate.exe

  • splitter

    |BN|

  • start_name

    df7427b5e05183e625345c3c37ef31c0

  • startup

    true

  • usb_spread

    true

aes.plain

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.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b33d569af5e490875d6473c6402797ddb4ce639bb1f1cf7f67698eeafa625f09.exe
    "C:\Users\Admin\AppData\Local\Temp\b33d569af5e490875d6473c6402797ddb4ce639bb1f1cf7f67698eeafa625f09.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1340
    • C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe
      "C:\Users\Admin\AppData\Roaming\Microsoft\MyClient\WindowsUpdate.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:1280

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    131KB

    MD5

    c4f79edc4498c5570495bb36fc942134

    SHA1

    00046b588252502480e8e708a22d25ae1d9b05fa

    SHA256

    b33d569af5e490875d6473c6402797ddb4ce639bb1f1cf7f67698eeafa625f09

    SHA512

    07bdeb39b35835a752886c2d308a68d263b36e8372d2bf320ede5b85252d14e284985d0889dfa9fcffec7ede7c3585a46cb0165b00be903755ffe63cacb21cef

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

    Filesize

    131KB

    MD5

    c4f79edc4498c5570495bb36fc942134

    SHA1

    00046b588252502480e8e708a22d25ae1d9b05fa

    SHA256

    b33d569af5e490875d6473c6402797ddb4ce639bb1f1cf7f67698eeafa625f09

    SHA512

    07bdeb39b35835a752886c2d308a68d263b36e8372d2bf320ede5b85252d14e284985d0889dfa9fcffec7ede7c3585a46cb0165b00be903755ffe63cacb21cef

  • memory/1280-76-0x0000000000000000-mapping.dmp

  • memory/1280-81-0x0000000002046000-0x0000000002065000-memory.dmp

    Filesize

    124KB

  • memory/1280-80-0x000007FEF3760000-0x000007FEF47F6000-memory.dmp

    Filesize

    16.6MB

  • memory/1280-79-0x0000000002040000-0x0000000002042000-memory.dmp

    Filesize

    8KB

  • memory/1340-69-0x0000000000AD9000-0x0000000000ADD000-memory.dmp

    Filesize

    16KB

  • memory/1340-71-0x0000000000AE5000-0x0000000000AF0000-memory.dmp

    Filesize

    44KB

  • memory/1340-63-0x0000000000AB9000-0x0000000000ABB000-memory.dmp

    Filesize

    8KB

  • memory/1340-62-0x0000000000AB7000-0x0000000000AB9000-memory.dmp

    Filesize

    8KB

  • memory/1340-64-0x0000000000ABB000-0x0000000000ABD000-memory.dmp

    Filesize

    8KB

  • memory/1340-65-0x0000000000ABD000-0x0000000000AC1000-memory.dmp

    Filesize

    16KB

  • memory/1340-66-0x0000000000AC1000-0x0000000000AC5000-memory.dmp

    Filesize

    16KB

  • memory/1340-68-0x0000000000AD5000-0x0000000000AD9000-memory.dmp

    Filesize

    16KB

  • memory/1340-54-0x000007FEF3760000-0x000007FEF47F6000-memory.dmp

    Filesize

    16.6MB

  • memory/1340-67-0x0000000000AD1000-0x0000000000AD5000-memory.dmp

    Filesize

    16KB

  • memory/1340-70-0x0000000000ADD000-0x0000000000AE5000-memory.dmp

    Filesize

    32KB

  • memory/1340-61-0x0000000000AB5000-0x0000000000AB7000-memory.dmp

    Filesize

    8KB

  • memory/1340-72-0x000000001EB80000-0x000000001EB89000-memory.dmp

    Filesize

    36KB

  • memory/1340-73-0x0000000000AAC000-0x0000000000AAF000-memory.dmp

    Filesize

    12KB

  • memory/1340-75-0x0000000000AB1000-0x0000000000AB4000-memory.dmp

    Filesize

    12KB

  • memory/1340-74-0x0000000000AD5000-0x0000000000AD8000-memory.dmp

    Filesize

    12KB

  • memory/1340-60-0x0000000000AB3000-0x0000000000AB5000-memory.dmp

    Filesize

    8KB

  • memory/1340-58-0x0000000000AAE000-0x0000000000AB0000-memory.dmp

    Filesize

    8KB

  • memory/1340-59-0x0000000000AB1000-0x0000000000AB3000-memory.dmp

    Filesize

    8KB

  • memory/1340-57-0x0000000000AAC000-0x0000000000AAE000-memory.dmp

    Filesize

    8KB

  • memory/1340-56-0x0000000000A76000-0x0000000000A95000-memory.dmp

    Filesize

    124KB

  • memory/1340-55-0x0000000000A70000-0x0000000000A72000-memory.dmp

    Filesize

    8KB