Analysis

  • max time kernel
    135s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/09/2024, 05:02

General

  • Target
    Draft-Contract - QT-ACR-VAV #2018105.scr
  • Size 593KB
  • Sample240916-fpc8dazele
  • SHA256 5f87086ab87b2eb8d0cff4b0776d062d071e5369c28ba07cea2fb8e99e833dce
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • 46.243.189.131:8765

Mutex
  • 7fe807b8-5584-4b51-9d61-c97d8e699fb3

Attributes
  • activate_away_mode

    false

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2018-07-12T15:41:04.289187136Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    8765

  • default_group

    Default

  • 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

    7fe807b8-5584-4b51-9d61-c97d8e699fb3

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    46.243.189.131

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    true

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8000

Signatures

  • NanoCore

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

  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Draft-Contract - QT-ACR-VAV #2018105.scr
    "C:\Users\Admin\AppData\Local\Temp\Draft-Contract - QT-ACR-VAV #2018105.scr" /S
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1856
    • C:\Windows\SysWOW64\cmd.exe
      "cmd"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4732
      • C:\Users\Admin\Desktop\filename.exe
        "C:\Users\Admin\Desktop\filename.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:116
        • C:\Windows\SysWOW64\cmd.exe
          "cmd"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:1248
          • C:\Windows\SysWOW64\reg.exe
            reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "Update" /d "cmd /c type "C:\Users\Admin\AppData\Local\Temp\Update.txt" | cmd"
            5⤵
            • Adds Run key to start application
            • System Location Discovery: System Language Discovery
            PID:3528
        • C:\Users\Admin\Desktop\filename.exe
          "C:\Users\Admin\Desktop\filename.exe"
          4⤵
          • Executes dropped EXE
          PID:3288
        • C:\Users\Admin\Desktop\filename.exe
          "C:\Users\Admin\Desktop\filename.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Drops file in Program Files directory
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4724
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "DPI Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6755.tmp"
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:4372
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "DPI Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6811.tmp"
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:5012

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        filename.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\filename.exe.log
        • Size 223B
        • SHA256 d7f4964443470b6729865676d76f5f1f416da633033071c34ea5eb19cdea53b5
        • MD5 SHA1 SHA512

        tmp6755.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmp6755.tmp
        • Size 1KB
        • SHA256 b55422096b144e40a6061d9e894cdb17d2690792ed8939329c4755099a0d73d8
        • MD5 SHA1 SHA512

        tmp6811.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmp6811.tmp
        • Size 1KB
        • SHA256 7dce876e35550f4a5b8ce8a8bbab3b0ccd7c5b8660f9db4b832466b77e3a8b7c
        • MD5 SHA1 SHA512

        filename.exe

        • Path C:\Users\Admin\Desktop\filename.exe
        • Size 593KB
        • SHA256 5f87086ab87b2eb8d0cff4b0776d062d071e5369c28ba07cea2fb8e99e833dce
        • MD5 SHA1 SHA512 SSDEEP

        memory/116-9-0x0000000074DF0000-0x00000000753A1000-memory.dmp

        memory/116-16-0x0000000074DF0000-0x00000000753A1000-memory.dmp

        memory/1856-1-0x0000000074DF0000-0x00000000753A1000-memory.dmp

        memory/1856-2-0x0000000074DF0000-0x00000000753A1000-memory.dmp

        memory/1856-8-0x0000000074DF0000-0x00000000753A1000-memory.dmp

        memory/1856-0-0x0000000074DF2000-0x0000000074DF3000-memory.dmp

        memory/4724-12-0x0000000000400000-0x0000000000438000-memory.dmp

        memory/4724-19-0x0000000074DF0000-0x00000000753A1000-memory.dmp

        memory/4724-17-0x0000000074DF0000-0x00000000753A1000-memory.dmp

        memory/4724-18-0x0000000074DF0000-0x00000000753A1000-memory.dmp

        memory/4724-27-0x0000000074DF0000-0x00000000753A1000-memory.dmp