Overview

overview

10

Static

static

fwfuJFhRr1BqCWi.exe

windows7_x64

10

fwfuJFhRr1BqCWi.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    145s
  • max time network
    139s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    21-05-2022 00:25

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General

  • Target

    fwfuJFhRr1BqCWi.exe

  • Size

    589KB

  • MD5

    372d925870b10617a1bafa396d646bd9

  • SHA1

    647431572f8119f401092f8874b087d1fa468ac4

  • SHA256

    5693fc15c7c4843819dd2e7d768f7ad32c031ca0a112cf604d38319d00e7a811

  • SHA512

    5f632d330eab155ecda41becc25fd6be13ebe1d5da7e6d13f7b421abd223f2a78e08b33b9ee008953a5676f15a81e62031bbfa69e93e7c7949670d28025d3d75

Score
10/10
nanocorekeyloggerpersistencespywarestealertrojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

185.140.53.51:1985

127.0.0.1:1985
Mutex

05567b5c-42af-4a71-996e-6f0227b9f4ae

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-05-09T11:35:52.395864036Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1985

  • default_group

    Sureboy

  • 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

    05567b5c-42af-4a71-996e-6f0227b9f4ae

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    185.140.53.51

  • 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.

    keyloggertrojanstealerspywarenanocore
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fwfuJFhRr1BqCWi.exe
    "C:\Users\Admin\AppData\Local\Temp\fwfuJFhRr1BqCWi.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2512
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\&startupname&" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4B70.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2584
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
      "{path}"
      2⤵
        PID:3536
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
        "{path}"
        2⤵
          PID:1972
        • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
          "{path}"
          2⤵
          • Adds Run key to start application
          • Drops file in Program Files directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: GetForegroundWindowSpam
          • Suspicious use of AdjustPrivilegeToken
          PID:4632

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\tmp4B70.tmp
        Filesize

        1KB

        MD5

        ab9f8a9574d9209cd8666decb37e33cc

        SHA1

        b768b98d37b96bcf5eeeb4bae10589a196b66db2

        SHA256

        2c052172f943620c36053efd2ab1d6ef9fbb671c55669b9f49430f0f7acd7704

        SHA512

        5059538580cce17a2c7516e3117297310455e38ff32d51c6e17ef188448ce3567f9c968ad478df725ed2ce8630ceee2340246264a6e60877895591a67d45da70

        Download Submit

      • memory/1972-134-0x0000000000000000-mapping.dmp

        Download

      • memory/2512-130-0x0000000074F30000-0x00000000754E1000-memory.dmp

        Filesize

        5.7MB

        Download

      • memory/2584-131-0x0000000000000000-mapping.dmp

        Download

      • memory/3536-133-0x0000000000000000-mapping.dmp

        Download

      • memory/4632-135-0x0000000000000000-mapping.dmp

        Download

      • memory/4632-136-0x0000000000400000-0x0000000000438000-memory.dmp

        Filesize

        224KB

        Download

      • memory/4632-137-0x0000000074F30000-0x00000000754E1000-memory.dmp

        Filesize

        5.7MB

        Download