Overview

overview

10

Static

static

10

4fbba14a29...5c.exe

windows7_x64

10

4fbba14a29...5c.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    91s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    14/06/2022, 22:16

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General

  • Target
    4fbba14a292b8827b2034f8a3b22ad408248e64585876cd93d7eb9e4bf96735c.exe
  • Size 316KB
  • Sample220614-169m5abfd6
  • SHA256 4fbba14a292b8827b2034f8a3b22ad408248e64585876cd93d7eb9e4bf96735c
  • MD5 SHA1 SHA512
Score
10/10
blacknetsecondpersistencesuricatatrojan

Malware Config

Extracted

Family

  • blacknet

Version

  • v3.7.0 Public

Botnet

  • Second

C2

  • https://mailquickdiate.com

Mutex

  • BN[e9ebec8bb16ee9a3]

Attributes
  • antivm

    false

  • elevate_uac

    false

  • install_name

    WindowsUpdate.exe

  • splitter

    |BN|

  • start_name

    e162b1333458a713bc6916cc8ac4110c

  • startup

    true

  • usb_spread

    false

aes.plain

Signatures

  • BlackNET

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

    trojanblacknet
  • BlackNET Payload 3 IoCs
  • Contains code to disable Windows Defender 3 IoCs

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

  • suricata: ET MALWARE Win32/BlackNET CnC Keep-Alive

    suricata: ET MALWARE Win32/BlackNET CnC Keep-Alive

    suricata
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Adds Run key to start application 2 TTPs 3 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 46 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4fbba14a292b8827b2034f8a3b22ad408248e64585876cd93d7eb9e4bf96735c.exe
    "C:\Users\Admin\AppData\Local\Temp\4fbba14a292b8827b2034f8a3b22ad408248e64585876cd93d7eb9e4bf96735c.exe"
    1⤵
    • 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:2432
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c ping 1.1.1.1 -n 5 -w 5000 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\4fbba14a292b8827b2034f8a3b22ad408248e64585876cd93d7eb9e4bf96735c.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3452
      • C:\Windows\system32\PING.EXE
        ping 1.1.1.1 -n 5 -w 5000
        3⤵
        • Runs ping.exe
        PID:2388
    • C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
      "C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe"
      2⤵
      • Executes dropped EXE
      • 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:2116
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /c ping 1.1.1.1 -n 5 -w 5000 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4156
        • C:\Windows\system32\PING.EXE
          ping 1.1.1.1 -n 5 -w 5000
          4⤵
          • Runs ping.exe
          PID:4204

Network

        MITRE ATT&CK Enterprise v6

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        Downloads

        WindowsUpdate.exe
        • Path C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
        • Size 316KB
        • SHA256 4fbba14a292b8827b2034f8a3b22ad408248e64585876cd93d7eb9e4bf96735c
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        WindowsUpdate.exe
        • Path C:\Users\Admin\AppData\Local\Temp\Microsoft\MyClient\WindowsUpdate.exe
        • Size 316KB
        • SHA256 4fbba14a292b8827b2034f8a3b22ad408248e64585876cd93d7eb9e4bf96735c
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/2116-138-0x00007FFC79F30000-0x00007FFC7A9F1000-memory.dmp
        Download

        memory/2116-141-0x00007FFC79F30000-0x00007FFC7A9F1000-memory.dmp
        Download

        memory/2432-130-0x00000000001B0000-0x0000000000204000-memory.dmp
        Download

        memory/2432-131-0x00007FFC79F30000-0x00007FFC7A9F1000-memory.dmp
        Download

        memory/2432-137-0x00007FFC79F30000-0x00007FFC7A9F1000-memory.dmp
        Download