Analysis

  • max time kernel
    155s
  • max time network
    183s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08-09-2022 05:13

General

  • Target

    SecuriteInfo.com.Win32.CrypterX-gen.27794.exe

  • Size

    564KB

  • MD5

    d2511f548930bc0a616afb4bf2f5eb59

  • SHA1

    dfd9d5479816b67c213fa35f87280c192d1a20a1

  • SHA256

    d867f1bbf4a3d8e8de9ce9c75d7d1690a9ab15ba919ed0d01f6bc66683e074c4

  • SHA512

    e9922aefdd68bfbb1773ccf75f2412af987e67570d876bfd99aee5fd46c616a430fe8ec9fc1917a797ca3d433d94cc81e87ca5fe8eea38638361b4bbacd6651e

  • SSDEEP

    12288:g8l02b1zzUFFiRUUWgSXGjITqZfs+Bog:blfzzUFAKDlW8Tqf

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

brewsterchristophe.ddns.net:5899

194,147,5,75:5899

Mutex

b8aebc29-8c64-444f-99e6-dc4122e9bbfc

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    194,147,5,75

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-04-29T03:26:40.572298236Z

  • 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

    5899

  • 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

    b8aebc29-8c64-444f-99e6-dc4122e9bbfc

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    brewsterchristophe.ddns.net

  • 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 1 IoCs
  • Adds Run key to start application 2 TTPs 3 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Runs ping.exe 1 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 35 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 51 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.27794.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.27794.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2304
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 13 > nul && REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "Bin" /t REG_SZ /d "C:\Users\Admin\Desktop\Bin.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2924
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 13
        3⤵
        • Runs ping.exe
        PID:4196
      • C:\Windows\SysWOW64\reg.exe
        REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /f /v "Bin" /t REG_SZ /d "C:\Users\Admin\Desktop\Bin.exe"
        3⤵
        • Adds Run key to start application
        PID:3280
    • C:\Windows\SysWOW64\cmd.exe
      "cmd" /c ping 127.0.0.1 -n 18 > nul && copy "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.27794.exe" "C:\Users\Admin\Desktop\Bin.exe" && ping 127.0.0.1 -n 18 > nul && "C:\Users\Admin\Desktop\Bin.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3760
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 18
        3⤵
        • Runs ping.exe
        PID:4380
      • C:\Windows\SysWOW64\PING.EXE
        ping 127.0.0.1 -n 18
        3⤵
        • Runs ping.exe
        PID:4328
      • C:\Users\Admin\Desktop\Bin.exe
        "C:\Users\Admin\Desktop\Bin.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3500
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          4⤵
            PID:228
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
            4⤵
              PID:3300
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
              "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
              4⤵
              • Adds Run key to start application
              • Checks whether UAC is enabled
              • Drops file in Program Files directory
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:1204
              • C:\Windows\SysWOW64\schtasks.exe
                "schtasks.exe" /create /f /tn "DDP Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp2FD0.tmp"
                5⤵
                • Creates scheduled task(s)
                PID:3464
              • C:\Windows\SysWOW64\schtasks.exe
                "schtasks.exe" /create /f /tn "DDP Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp304E.tmp"
                5⤵
                • Creates scheduled task(s)
                PID:4664

      Network

      MITRE ATT&CK Matrix ATT&CK v6

      Execution

      Scheduled Task

      1
      T1053

      Persistence

      Registry Run Keys / Startup Folder

      1
      T1060

      Scheduled Task

      1
      T1053

      Privilege Escalation

      Scheduled Task

      1
      T1053

      Defense Evasion

      Modify Registry

      1
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Remote System Discovery

      1
      T1018

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\tmp2FD0.tmp
        Filesize

        1KB

        MD5

        48ef7fa9033389ad7929d7a6b9d10298

        SHA1

        9db6cb7325c8bdf66a15f7b5f34703709a45aeb6

        SHA256

        0c1b5f67eeb276d1d4205b138ce32bc6149924e02281a2db8e4623a700e88f15

        SHA512

        ac8bd104ecbacc9bccce9e087f67e5b18072d59367ccd31d4e66132b6baaea520cba5b9b59464483d86abf74826b382c402f12e9a586c99bda8c78a0de33944e

      • C:\Users\Admin\AppData\Local\Temp\tmp304E.tmp
        Filesize

        1KB

        MD5

        677848190631e19222304d1982aa2e1b

        SHA1

        bed6cf97d3458e4ea59ff9823375d915a9b3d682

        SHA256

        8bcf16c788d228932fa707bb4250c05151e099bdf7040adc717e53680601be3d

        SHA512

        f5d41e150011bc63f4c95799e21fe91ffaa25eb05f4ca46ea89f3a3ca5325413ba4e0b7b5d69c0bc189955f3308c4928016a7cc1d6f7c2352639106952e92b1e

      • C:\Users\Admin\Desktop\Bin.exe
        Filesize

        564KB

        MD5

        d2511f548930bc0a616afb4bf2f5eb59

        SHA1

        dfd9d5479816b67c213fa35f87280c192d1a20a1

        SHA256

        d867f1bbf4a3d8e8de9ce9c75d7d1690a9ab15ba919ed0d01f6bc66683e074c4

        SHA512

        e9922aefdd68bfbb1773ccf75f2412af987e67570d876bfd99aee5fd46c616a430fe8ec9fc1917a797ca3d433d94cc81e87ca5fe8eea38638361b4bbacd6651e

      • C:\Users\Admin\Desktop\Bin.exe
        Filesize

        564KB

        MD5

        d2511f548930bc0a616afb4bf2f5eb59

        SHA1

        dfd9d5479816b67c213fa35f87280c192d1a20a1

        SHA256

        d867f1bbf4a3d8e8de9ce9c75d7d1690a9ab15ba919ed0d01f6bc66683e074c4

        SHA512

        e9922aefdd68bfbb1773ccf75f2412af987e67570d876bfd99aee5fd46c616a430fe8ec9fc1917a797ca3d433d94cc81e87ca5fe8eea38638361b4bbacd6651e

      • memory/228-147-0x0000000000000000-mapping.dmp
      • memory/1204-150-0x0000000000400000-0x0000000000438000-memory.dmp
        Filesize

        224KB

      • memory/1204-149-0x0000000000000000-mapping.dmp
      • memory/1204-155-0x0000000006E90000-0x0000000006EF6000-memory.dmp
        Filesize

        408KB

      • memory/2304-133-0x0000000004B20000-0x0000000004BBC000-memory.dmp
        Filesize

        624KB

      • memory/2304-134-0x0000000005D60000-0x0000000006304000-memory.dmp
        Filesize

        5.6MB

      • memory/2304-136-0x0000000005A40000-0x0000000005A4A000-memory.dmp
        Filesize

        40KB

      • memory/2304-132-0x0000000000F50000-0x0000000000FE2000-memory.dmp
        Filesize

        584KB

      • memory/2304-135-0x0000000005990000-0x0000000005A22000-memory.dmp
        Filesize

        584KB

      • memory/2924-137-0x0000000000000000-mapping.dmp
      • memory/3280-141-0x0000000000000000-mapping.dmp
      • memory/3300-148-0x0000000000000000-mapping.dmp
      • memory/3464-151-0x0000000000000000-mapping.dmp
      • memory/3500-146-0x0000000000CF0000-0x0000000000D82000-memory.dmp
        Filesize

        584KB

      • memory/3500-143-0x0000000000000000-mapping.dmp
      • memory/3760-139-0x0000000000000000-mapping.dmp
      • memory/4196-138-0x0000000000000000-mapping.dmp
      • memory/4328-142-0x0000000000000000-mapping.dmp
      • memory/4380-140-0x0000000000000000-mapping.dmp
      • memory/4664-153-0x0000000000000000-mapping.dmp