Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    14/05/2021, 12:15

General

  • Target
    Order#PPO040963RG02.PDF.exe
  • Size 574KB
  • Sample210514-fm87e64fda
  • SHA256 5afad60b5cd65c577738eafeac4574ccf449e05295cba4e1e8b7daaed51e9a1d
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • 23.105.131.142:2092

  • startedhere.ddns.net:2092

Mutex
  • ba5f434c-3370-4fb7-bec8-4c7f593d07f3

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    startedhere.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-02-21T00:06:19.496724036Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    2092

  • default_group

    Grace

  • 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

    ba5f434c-3370-4fb7-bec8-4c7f593d07f3

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    23.105.131.142

  • 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

  • NanoCore

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

  • Suspicious use of SetThreadContext 1 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.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Order#PPO040963RG02.PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\Order#PPO040963RG02.PDF.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:740
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\OsApLHezwdtD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7C6F.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3044
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:4016

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/740-114-0x0000000002E50000-0x0000000002E51000-memory.dmp

        memory/4016-117-0x0000000000400000-0x0000000000438000-memory.dmp

        memory/4016-120-0x0000000002EB1000-0x0000000002EB2000-memory.dmp

        memory/4016-119-0x0000000002EB0000-0x0000000002EB1000-memory.dmp