Analysis

  • max time kernel
    112s
  • max time network
    118s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220901-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/11/2022, 00:01

General

  • Target

    1b7ba0a5a26b2a0fe9d98fdddb8e2be089bd502daceaece542b91848e75d1062.exe

  • Size

    615KB

  • MD5

    0a8a66d67bf1c167885bffe3c2de2669

  • SHA1

    3e8448cd135263dcf513e09cfcace9382dc577b1

  • SHA256

    1b7ba0a5a26b2a0fe9d98fdddb8e2be089bd502daceaece542b91848e75d1062

  • SHA512

    dcd1d0b1eeaaf789631303ad844fea65e7b5cdbe2e10a7d213a74720e84ff1651708f99724aa2e9f0b4c6a74def87847d0ed75085a295b3adc939f09724e1922

  • SSDEEP

    12288:vOv5jKhsfoPA+yeVKUCUxP4C902bdRtJJPiIkDL6tNsFqYpwU35ZI:vq5TfcdHj4fmbUDL6nY935ZI

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

moftsvs.ig42.org:9045

212.7.192.242:9045

Mutex

c7bf44a3-7212-4d60-9ee3-f0991c8392f8

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    212.7.192.242

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2015-03-06T14:55:41.478810836Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    9045

  • default_group

    Default Team

  • 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

    c7bf44a3-7212-4d60-9ee3-f0991c8392f8

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    moftsvs.ig42.org

  • primary_dns_server

    8.8.8.8

  • request_elevation

    false

  • 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.

  • UPX packed file 3 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • AutoIT Executable 2 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of FindShellTrayWindow 7 IoCs
  • Suspicious use of SendNotifyMessage 7 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1b7ba0a5a26b2a0fe9d98fdddb8e2be089bd502daceaece542b91848e75d1062.exe
    "C:\Users\Admin\AppData\Local\Temp\1b7ba0a5a26b2a0fe9d98fdddb8e2be089bd502daceaece542b91848e75d1062.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4252
    • C:\Users\Admin\AppData\Local\Temp\1b7ba0a5a26b2a0fe9d98fdddb8e2be089bd502daceaece542b91848e75d1062.exe
      "C:\Users\Admin\AppData\Local\Temp\1b7ba0a5a26b2a0fe9d98fdddb8e2be089bd502daceaece542b91848e75d1062.exe" /AutoIt3ExecuteScript "C:\Users\Admin\AppData\Local\Temp\lf2" "C:\Users\Admin\AppData\Local\Temp\1b7ba0a5a26b2a0fe9d98fdddb8e2be089bd502daceaece542b91848e75d1062.exe" "1b7ba0a5a26b2a0fe9d98fdddb8e2be089bd502daceaece542b91848e75d1062.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:4304
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
        3⤵
          PID:3968
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 3968 -s 12
            4⤵
            • Program crash
            PID:3692
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3968 -ip 3968
      1⤵
        PID:4564

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\ger

              Filesize

              202KB

              MD5

              62cddffde88715a338548dbfa47b555c

              SHA1

              17d9eed664beee32f9fa62d61daaaac931885e51

              SHA256

              06538639dc35c0781397871581f21949a11afd5080d0f6a69b5c09c8d278cb8a

              SHA512

              0fe70f5fae9ca1fee043b00bd0119dc1c5a7055881c1ed91a725a8cf7476c365e0b0d621ce35b5e6ff9e07687e5fa8901c47c4496297723288b10b39bbaa5442

            • C:\Users\Admin\AppData\Local\Temp\lf2

              Filesize

              5KB

              MD5

              be7a4ea468b142994adae5c442dfdd06

              SHA1

              606fb007510259993f4726a8d0b1f41fa1de23d9

              SHA256

              d399db8ae87b1d97732184cd2bbf67d745c4146cf8d6d33e26bedcfd53384064

              SHA512

              c55609f24408106a2e171cd7f691eeecb81b99be6023bdec672e578bf5bfc5ca787d94d9a5affff98a0c996771ba5da5d53d4b499240571b957a90c0e3059511

            • memory/3968-138-0x0000000000400000-0x0000000000438000-memory.dmp

              Filesize

              224KB

            • memory/4252-132-0x0000000000CE0000-0x0000000000E45000-memory.dmp

              Filesize

              1.4MB

            • memory/4252-135-0x0000000000CE0000-0x0000000000E45000-memory.dmp

              Filesize

              1.4MB

            • memory/4304-139-0x0000000000CE0000-0x0000000000E45000-memory.dmp

              Filesize

              1.4MB