Analysis

  • max time kernel
    136s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-12-2023 00:02

General

  • Target

    97cb3fda3cff430377a866d6b437de8f.exe

  • Size

    220KB

  • MD5

    97cb3fda3cff430377a866d6b437de8f

  • SHA1

    2359c8459c1e1dd133c2842b51d2982e63016f92

  • SHA256

    e6507f36045c13dee736bea44d61e90169ea69de61e9dc50b5743960c5b8f85a

  • SHA512

    e192d3afaa093b5b11643aafefa8192cfeb79e5f284e6c757532fd3e2a4a93970f5f8d54b0e983b4c406ced46aee04a99c186f31ff321f9292c51587603c630f

  • SSDEEP

    3072:alaJEgEXbfa9K4Em8wNBiXMhDJv7WehI2135eDRCyqTp0FUSVBOHfHAXTRsPCgfr:BEg4S9KqiSJvthI25ebqqBOKTRsaj2e

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 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.

  • 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:3680
    • 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:112
      • 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:2788
        • 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:4952
        • 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:2524
      • 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:1428
        • C:\Windows\SysWOW64\PING.EXE
          ping 1.1.1.1 -n 1 -w 100
          4⤵
          • Runs ping.exe
          PID:4076
        • C:\Windows\SysWOW64\PING.EXE
          ping 1.1.1.1 -n 1 -w 900
          4⤵
          • Runs ping.exe
          PID:1152
      • 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:1464
        • 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:1300
        • C:\Windows\Microsoft\MyClient\WindowsUpdate.exe
          "C:\Windows\Microsoft\MyClient\WindowsUpdate.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:5016
          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
            "powershell" Get-MpPreference -verbose
            5⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3500
          • 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:656
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks" /delete /tn "WindowsUpdate.exe" /f
            5⤵
              PID:3256
          • C:\Windows\SYSTEM32\schtasks.exe
            "schtasks" /delete /tn "WindowsUpdate.exe" /f
            4⤵
              PID:4192
      • 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
        1⤵
        • UAC bypass
        • Modifies registry key
        PID:4008
      • C:\Windows\system32\cmd.exe
        "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\545A.tmp\545B.tmp\545C.bat C:\Users\Admin\AppData\Local\Temp\Mnrjvryib.exe"
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:236
        • C:\Windows\system32\taskkill.exe
          Taskkill /IM cmd.exe /F
          2⤵
          • Kills process with taskkill
          • Suspicious use of AdjustPrivilegeToken
          PID:32
      • 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
        1⤵
        • Suspicious use of WriteProcessMemory
        PID:2688
      • C:\Windows\system32\cmd.exe
        "C:\Windows\sysnative\cmd" /c "C:\Users\Admin\AppData\Local\Temp\53EC.tmp\53ED.tmp\53EE.bat C:\Users\Admin\AppData\Local\Temp\Inpwdja.exe"
        1⤵
          PID:4360
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "powershell" Get-MpPreference -verbose
          1⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3824
        • C:\Windows\System32\sihclient.exe
          C:\Windows\System32\sihclient.exe /cv apyXpiSGQEezF0sqZFyx6g.0.2
          1⤵
          • Suspicious use of WriteProcessMemory
          PID:4360

        Network

        MITRE ATT&CK Matrix ATT&CK v13

        Execution

        Scheduled Task/Job

        1
        T1053

        Persistence

        Create or Modify System Process

        1
        T1543

        Windows Service

        1
        T1543.003

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Scheduled Task/Job

        1
        T1053

        Privilege Escalation

        Create or Modify System Process

        1
        T1543

        Windows Service

        1
        T1543.003

        Abuse Elevation Control Mechanism

        1
        T1548

        Bypass User Account Control

        1
        T1548.002

        Boot or Logon Autostart Execution

        1
        T1547

        Registry Run Keys / Startup Folder

        1
        T1547.001

        Scheduled Task/Job

        1
        T1053

        Defense Evasion

        Modify Registry

        4
        T1112

        Impair Defenses

        2
        T1562

        Disable or Modify Tools

        2
        T1562.001

        Abuse Elevation Control Mechanism

        1
        T1548

        Bypass User Account Control

        1
        T1548.002

        Discovery

        Query Registry

        2
        T1012

        System Information Discovery

        2
        T1082

        Remote System Discovery

        1
        T1018

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\97cb3fda3cff430377a866d6b437de8f.exe.log
          Filesize

          507B

          MD5

          76ffb2f33cb32ade8fc862a67599e9d8

          SHA1

          920cc4ab75b36d2f9f6e979b74db568973c49130

          SHA256

          f1a3724670e3379318ec9c73f6f39058cab0ab013ba3cd90c047c3d701362310

          SHA512

          f33502c2e1bb30c05359bfc6819ca934642a1e01874e3060349127d792694d56ad22fccd6c9477b8ee50d66db35785779324273f509576b48b7f85577e001b4e

        • C:\Users\Admin\AppData\Local\Temp\UacTest.exe
          Filesize

          140KB

          MD5

          7c011f0ea2387f0124c959e3f663cb4d

          SHA1

          12e668079661c557963236786bb821af4628ee1b

          SHA256

          6b69a8fd83ca150642a20128f84cdd2e91aaa6852e705e55e4116caa487903c4

          SHA512

          f5770246c943a997c96713a721d512fc0eaf530f3b7d22abe56f50d35b582af4b9f86a65113dee0f09aa7766d257ac0b29a9a56348891339399a2923b399925e

        • C:\Users\Admin\AppData\Local\Temp\furz.exe
          Filesize

          93KB

          MD5

          43c0183e6a22dafd4446a56afcf4b89f

          SHA1

          055684d4254c36bff5205da62dc27ec53fba3344

          SHA256

          68cf38e2acad6363401b589facbcd39871c4e838166bc8741db6d1159825dd1f

          SHA512

          f448b2422b5faa509da22d982625b8fa8edbf2403c458b6e27a65009f980e3e2201bb81ba9392a37496056aa5257985019dbbb2077c6a148a90322faff464750

        • C:\Users\Admin\AppData\Local\Temp\furz.exe
          Filesize

          117KB

          MD5

          b72d429d1d690165c7b0de4a074c4a58

          SHA1

          f0704d227482a80f2f90dab79ed4acd9770fe565

          SHA256

          b30eebf734354f55373978e395c912393f3c674aaa4717748ae449b09832f6ae

          SHA512

          f3b565e67d5a15d5305982701bd5f0d37eec0bfe2d152556584fa1d01faf1def6e616d0addea91e0663be084450b49f99e2108cc06a9b50c9e1482f9290b6c5c

        • memory/112-14-0x0000000005650000-0x0000000005660000-memory.dmp
          Filesize

          64KB

        • memory/112-109-0x00000000750A0000-0x0000000075850000-memory.dmp
          Filesize

          7.7MB

        • memory/112-13-0x0000000005650000-0x0000000005660000-memory.dmp
          Filesize

          64KB

        • memory/112-8-0x0000000000400000-0x0000000000432000-memory.dmp
          Filesize

          200KB

        • memory/112-12-0x00000000750A0000-0x0000000075850000-memory.dmp
          Filesize

          7.7MB

        • memory/1464-169-0x00007FFBCDAB0000-0x00007FFBCE571000-memory.dmp
          Filesize

          10.8MB

        • memory/1464-106-0x00007FFBCDAB0000-0x00007FFBCE571000-memory.dmp
          Filesize

          10.8MB

        • memory/1464-176-0x00007FFBCDAB0000-0x00007FFBCE571000-memory.dmp
          Filesize

          10.8MB

        • memory/1464-175-0x000000001C170000-0x000000001C319000-memory.dmp
          Filesize

          1.7MB

        • memory/1464-171-0x000000001BBE0000-0x000000001BBF0000-memory.dmp
          Filesize

          64KB

        • memory/1464-156-0x000000001BBE0000-0x000000001BBF0000-memory.dmp
          Filesize

          64KB

        • memory/1464-107-0x000000001BBE0000-0x000000001BBF0000-memory.dmp
          Filesize

          64KB

        • memory/1464-153-0x000000001BBE0000-0x000000001BBF0000-memory.dmp
          Filesize

          64KB

        • memory/1464-152-0x000000001BBE0000-0x000000001BBF0000-memory.dmp
          Filesize

          64KB

        • memory/1464-104-0x0000000000E90000-0x0000000000EB2000-memory.dmp
          Filesize

          136KB

        • memory/1464-113-0x000000001BBE0000-0x000000001BBF0000-memory.dmp
          Filesize

          64KB

        • memory/2788-111-0x0000000005030000-0x0000000005040000-memory.dmp
          Filesize

          64KB

        • memory/2788-112-0x0000000004980000-0x000000000498A000-memory.dmp
          Filesize

          40KB

        • memory/2788-130-0x00000000750A0000-0x0000000075850000-memory.dmp
          Filesize

          7.7MB

        • memory/2788-108-0x0000000000400000-0x000000000042C000-memory.dmp
          Filesize

          176KB

        • memory/2788-110-0x00000000750A0000-0x0000000075850000-memory.dmp
          Filesize

          7.7MB

        • memory/3500-180-0x00007FFBCDAB0000-0x00007FFBCE571000-memory.dmp
          Filesize

          10.8MB

        • memory/3500-189-0x0000025B8FD30000-0x0000025B8FD40000-memory.dmp
          Filesize

          64KB

        • memory/3500-192-0x00007FFBCDAB0000-0x00007FFBCE571000-memory.dmp
          Filesize

          10.8MB

        • memory/3500-188-0x0000025B8FD30000-0x0000025B8FD40000-memory.dmp
          Filesize

          64KB

        • memory/3680-0-0x00000000000A0000-0x00000000000DE000-memory.dmp
          Filesize

          248KB

        • memory/3680-5-0x0000000004C00000-0x0000000004C9C000-memory.dmp
          Filesize

          624KB

        • memory/3680-1-0x00000000750A0000-0x0000000075850000-memory.dmp
          Filesize

          7.7MB

        • memory/3680-3-0x00000000051B0000-0x0000000005754000-memory.dmp
          Filesize

          5.6MB

        • memory/3680-2-0x0000000004B00000-0x0000000004B10000-memory.dmp
          Filesize

          64KB

        • memory/3680-11-0x00000000750A0000-0x0000000075850000-memory.dmp
          Filesize

          7.7MB

        • memory/3680-7-0x0000000004A70000-0x0000000004A7A000-memory.dmp
          Filesize

          40KB

        • memory/3680-4-0x0000000004B10000-0x0000000004BA2000-memory.dmp
          Filesize

          584KB

        • memory/3824-136-0x00007FFBCDAB0000-0x00007FFBCE571000-memory.dmp
          Filesize

          10.8MB

        • memory/3824-138-0x000001EEBBBD0000-0x000001EEBBBE0000-memory.dmp
          Filesize

          64KB

        • memory/3824-137-0x000001EEBBBD0000-0x000001EEBBBE0000-memory.dmp
          Filesize

          64KB

        • memory/3824-144-0x000001EEA3670000-0x000001EEA3692000-memory.dmp
          Filesize

          136KB

        • memory/3824-151-0x00007FFBCDAB0000-0x00007FFBCE571000-memory.dmp
          Filesize

          10.8MB

        • memory/5016-172-0x0000000002FE0000-0x0000000002FF0000-memory.dmp
          Filesize

          64KB

        • memory/5016-170-0x00007FFBCDAB0000-0x00007FFBCE571000-memory.dmp
          Filesize

          10.8MB

        • memory/5016-195-0x0000000002FE0000-0x0000000002FF0000-memory.dmp
          Filesize

          64KB

        • memory/5016-194-0x0000000002FE0000-0x0000000002FF0000-memory.dmp
          Filesize

          64KB

        • memory/5016-193-0x0000000002FE0000-0x0000000002FF0000-memory.dmp
          Filesize

          64KB

        • memory/5016-197-0x000000001C1B0000-0x000000001C359000-memory.dmp
          Filesize

          1.7MB

        • memory/5016-198-0x00007FFBCDAB0000-0x00007FFBCE571000-memory.dmp
          Filesize

          10.8MB