Analysis

  • max time kernel
    90s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/02/2024, 22:40

General

  • Target
    97cb3fda3cff430377a866d6b437de8f.exe
  • Size 220KB
  • Sample240212-2ly7bsfb88
  • SHA256 e6507f36045c13dee736bea44d61e90169ea69de61e9dc50b5743960c5b8f85a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • blacknet

Version
  • v3.7.0 Public

Botnet
  • Bot

C2
  • http://furyx.de/panel

Mutex
  • BN[c1916af6f3a468e5b6f5c7f6b9c78982]

Attributes
  • antivm

    false

  • elevate_uac

    false

  • install_name

    WindowsUpdate.exe

  • splitter

    |BN|

  • start_name

    e162b1333458a713bc6916cc8ac4110c

  • startup

    false

  • 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.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
  • UAC bypass 3 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 5 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Kills process with taskkill 1 IoCs
  • Modifies registry class 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Runs ping.exe 1 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 52 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\97cb3fda3cff430377a866d6b437de8f.exe
    "C:\Users\Admin\AppData\Local\Temp\97cb3fda3cff430377a866d6b437de8f.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2616
    • C:\Users\Admin\AppData\Local\Temp\97cb3fda3cff430377a866d6b437de8f.exe
      "C:\Users\Admin\AppData\Local\Temp\97cb3fda3cff430377a866d6b437de8f.exe"
      2⤵
      • Checks computer location settings
      • Modifies registry class
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:5060
      • C:\Users\Admin\AppData\Local\Temp\furz.exe
        "C:\Users\Admin\AppData\Local\Temp\furz.exe"
        3⤵
        • Modifies Windows Defender Real-time Protection settings
        • Checks computer location settings
        • Executes dropped EXE
        • Adds Run key to start application
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:4844
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell" Get-MpPreference -verbose
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3208
        • C:\Windows\SYSTEM32\schtasks.exe
          "schtasks" /delete /tn "WindowsUpdate.exe" /f
          4⤵
            PID:1336
          • C:\Windows\Microsoft\MyClient\WindowsUpdate.exe
            "C:\Windows\Microsoft\MyClient\WindowsUpdate.exe"
            4⤵
            • Executes dropped EXE
            • Drops file in Windows directory
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:2320
            • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
              "powershell" Get-MpPreference -verbose
              5⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:2024
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks" /delete /tn "WindowsUpdate.exe" /f
              5⤵
                PID:4396
              • C:\Windows\SYSTEM32\schtasks.exe
                "schtasks" /create /tn "WindowsUpdate.exe" /sc ONLOGON /tr "C:\Windows\WindowsUpdate.exe" /rl HIGHEST /f
                5⤵
                • Creates scheduled task(s)
                PID:1612
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks" /create /tn "WindowsUpdate.exe" /sc ONLOGON /tr "C:\Windows\WindowsUpdate.exe" /rl HIGHEST /f
              4⤵
              • Creates scheduled task(s)
              PID:2336
          • C:\Users\Admin\AppData\Local\Temp\UacTest.exe
            "C:\Users\Admin\AppData\Local\Temp\UacTest.exe"
            3⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:5112
            • C:\Users\Admin\AppData\Local\Temp\Inpwdja.exe
              "C:\Users\Admin\AppData\Local\Temp\Inpwdja.exe"
              4⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:2324
              • C:\Windows\system32\cmd.exe
                "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\5081.tmp\5082.tmp\5083.bat C:\Users\Admin\AppData\Local\Temp\Inpwdja.exe"
                5⤵
                • Suspicious use of WriteProcessMemory
                PID:1236
                • C:\Windows\System32\cmd.exe
                  C:\Windows\System32\cmd.exe /k C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
                  6⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2572
                  • C:\Windows\System32\reg.exe
                    C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
                    7⤵
                    • UAC bypass
                    • Modifies registry key
                    PID:4764
            • C:\Users\Admin\AppData\Local\Temp\Mnrjvryib.exe
              "C:\Users\Admin\AppData\Local\Temp\Mnrjvryib.exe"
              4⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:2440
              • C:\Windows\system32\cmd.exe
                "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\50A0.tmp\50A1.tmp\50A2.bat C:\Users\Admin\AppData\Local\Temp\Mnrjvryib.exe"
                5⤵
                • Suspicious use of WriteProcessMemory
                PID:4000
                • C:\Windows\system32\taskkill.exe
                  Taskkill /IM cmd.exe /F
                  6⤵
                  • Kills process with taskkill
                  • Suspicious use of AdjustPrivilegeToken
                  PID:4952
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\System32\cmd.exe" /C ping 1.1.1.1 -n 1 -w 100 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\97cb3fda3cff430377a866d6b437de8f.exe"& ping 1.1.1.1 -n 1 -w 900 > Nul & Del "C:\Users\Admin\AppData\Local\Temp\97cb3fda3cff430377a866d6b437de8f.exe"
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:1992
            • C:\Windows\SysWOW64\PING.EXE
              ping 1.1.1.1 -n 1 -w 100
              4⤵
              • Runs ping.exe
              PID:4608
            • C:\Windows\SysWOW64\PING.EXE
              ping 1.1.1.1 -n 1 -w 900
              4⤵
              • Runs ping.exe
              PID:4052

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            powershell.exe.log

            • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
            • Size 2KB
            • SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
            • MD5 SHA1 SHA512

            97cb3fda3cff430377a866d6b437de8f.exe.log

            • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\97cb3fda3cff430377a866d6b437de8f.exe.log
            • Size 507B
            • SHA256 f1a3724670e3379318ec9c73f6f39058cab0ab013ba3cd90c047c3d701362310
            • MD5 SHA1 SHA512

            StartupProfileData-NonInteractive

            • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
            • Size 944B
            • SHA256 5ab6a1726f425c6d0158f55eb8d81754ddedd51e651aa0a899a29b7a58619c4c
            • MD5 SHA1 SHA512

            5083.bat

            • Path C:\Users\Admin\AppData\Local\Temp\5081.tmp\5082.tmp\5083.bat
            • Size 187B
            • SHA256 0848f1ac65974856844e59ff3b8d492c88acf43f0fd64505d5bf3fd4e43d9da6
            • MD5 SHA1 SHA512

            50A2.bat

            • Path C:\Users\Admin\AppData\Local\Temp\50A0.tmp\50A1.tmp\50A2.bat
            • Size 34B
            • SHA256 a9bf329ec3514d7d5698851137d508b763b1a627747b1ce40ddd5c524538459c
            • MD5 SHA1 SHA512

            Inpwdja.exe

            • Path C:\Users\Admin\AppData\Local\Temp\Inpwdja.exe
            • Size 88KB
            • SHA256 dce696122649ef915c08645cf53e6b118977ce476b076f72d00e3b6f3e309c77
            • MD5 SHA1 SHA512 SSDEEP

            Mnrjvryib.exe

            • Path C:\Users\Admin\AppData\Local\Temp\Mnrjvryib.exe
            • Size 88KB
            • SHA256 46618b299010b375a3be43493d14de102180a042f03bdfa1d3290d04feba587a
            • MD5 SHA1 SHA512 SSDEEP

            UacTest.exe

            • Path C:\Users\Admin\AppData\Local\Temp\UacTest.exe
            • Size 140KB
            • SHA256 6b69a8fd83ca150642a20128f84cdd2e91aaa6852e705e55e4116caa487903c4
            • MD5 SHA1 SHA512 SSDEEP

            __PSScriptPolicyTest_skdg1fri.p14.ps1

            • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_skdg1fri.p14.ps1
            • Size 60B
            • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
            • MD5 SHA1 SHA512

            furz.exe

            • Path C:\Users\Admin\AppData\Local\Temp\furz.exe
            • Size 117KB
            • SHA256 b30eebf734354f55373978e395c912393f3c674aaa4717748ae449b09832f6ae
            • MD5 SHA1 SHA512 SSDEEP

            memory/2024-180-0x00007FFDAC330000-0x00007FFDACDF1000-memory.dmp

            memory/2024-182-0x000002D3814E0000-0x000002D3814F0000-memory.dmp

            memory/2024-194-0x00007FFDAC330000-0x00007FFDACDF1000-memory.dmp

            memory/2024-181-0x000002D3814E0000-0x000002D3814F0000-memory.dmp

            memory/2320-199-0x00007FFDAC330000-0x00007FFDACDF1000-memory.dmp

            memory/2320-175-0x000000001B9D0000-0x000000001B9E0000-memory.dmp

            memory/2320-196-0x000000001B9D0000-0x000000001B9E0000-memory.dmp

            memory/2320-197-0x000000001B9D0000-0x000000001B9E0000-memory.dmp

            memory/2320-195-0x000000001B9D0000-0x000000001B9E0000-memory.dmp

            memory/2320-170-0x00007FFDAC330000-0x00007FFDACDF1000-memory.dmp

            memory/2320-176-0x000000001B9D0000-0x000000001B9E0000-memory.dmp

            memory/2616-12-0x0000000074DD0000-0x0000000075580000-memory.dmp

            memory/2616-5-0x0000000005860000-0x00000000058FC000-memory.dmp

            memory/2616-4-0x00000000056E0000-0x0000000005772000-memory.dmp

            memory/2616-3-0x0000000005D70000-0x0000000006314000-memory.dmp

            memory/2616-7-0x0000000005670000-0x000000000567A000-memory.dmp

            memory/2616-2-0x0000000005780000-0x0000000005790000-memory.dmp

            memory/2616-1-0x0000000074DD0000-0x0000000075580000-memory.dmp

            memory/2616-0-0x0000000000CA0000-0x0000000000CDE000-memory.dmp

            memory/3208-135-0x00007FFDAC330000-0x00007FFDACDF1000-memory.dmp

            memory/3208-146-0x00000289B9280000-0x00000289B92A2000-memory.dmp

            memory/3208-147-0x00000289A0410000-0x00000289A0420000-memory.dmp

            memory/3208-136-0x00000289A0410000-0x00000289A0420000-memory.dmp

            memory/3208-150-0x00007FFDAC330000-0x00007FFDACDF1000-memory.dmp

            memory/4844-174-0x000000001EFB0000-0x000000001F0B0000-memory.dmp

            memory/4844-178-0x00007FFDAC330000-0x00007FFDACDF1000-memory.dmp

            memory/4844-152-0x0000000002A10000-0x0000000002A20000-memory.dmp

            memory/4844-154-0x0000000002A10000-0x0000000002A20000-memory.dmp

            memory/4844-169-0x000000001EFB0000-0x000000001F0B0000-memory.dmp

            memory/4844-102-0x0000000000920000-0x0000000000942000-memory.dmp

            memory/4844-171-0x00007FFDAC330000-0x00007FFDACDF1000-memory.dmp

            memory/4844-173-0x0000000002A10000-0x0000000002A20000-memory.dmp

            memory/4844-151-0x0000000002A10000-0x0000000002A20000-memory.dmp

            memory/4844-106-0x00007FFDAC330000-0x00007FFDACDF1000-memory.dmp

            memory/4844-108-0x0000000002A10000-0x0000000002A20000-memory.dmp

            memory/4844-153-0x0000000002A10000-0x0000000002A20000-memory.dmp

            memory/5060-110-0x0000000074DD0000-0x0000000075580000-memory.dmp

            memory/5060-14-0x00000000052A0000-0x00000000052B0000-memory.dmp

            memory/5060-13-0x00000000052A0000-0x00000000052B0000-memory.dmp

            memory/5060-11-0x0000000074DD0000-0x0000000075580000-memory.dmp

            memory/5060-8-0x0000000000400000-0x0000000000432000-memory.dmp

            memory/5112-109-0x0000000074DD0000-0x0000000075580000-memory.dmp

            memory/5112-111-0x0000000004EF0000-0x0000000004F00000-memory.dmp

            memory/5112-107-0x0000000000400000-0x000000000042C000-memory.dmp

            memory/5112-112-0x0000000005050000-0x000000000505A000-memory.dmp

            memory/5112-128-0x0000000074DD0000-0x0000000075580000-memory.dmp