Analysis

  • max time kernel
    196s
  • max time network
    199s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/11/2022, 23:32

General

  • Target

    ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe

  • Size

    1.6MB

  • MD5

    e7e37ae20a4bf093b1a048f81eb62ad6

  • SHA1

    c8fce91ab8cc803074b7de4ebcd2fbf0f71a20e9

  • SHA256

    ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102

  • SHA512

    231188f996387c4836ef1174a096b0f066f0d5b28f517738ccd1cfa830c54edbf49c385cf8406734afa2d4030e5fe9182563bd2ae3efc7a6a6791bd6148ec6ac

  • SSDEEP

    24576:fRmJkcoQricOIQxiZY1iaMc6EuDZzY3fIJNfHT7W00KJBUnbrvb4Vn7E:0JZoQrbTFZY1ia8Afkzlv3Ubp

Malware Config

Extracted

Family

nanocore

Version

1.2.1.1

C2

donx.strangled.net:3175

Mutex

da61f0aa-aa41-407f-9f66-5bdaf5a6bb2c

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

  • buffer_size

    65535

  • build_time

    2014-10-16T23:01:56.136889236Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    3175

  • default_group

    Crypted Stub

  • 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

    da61f0aa-aa41-407f-9f66-5bdaf5a6bb2c

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    donx.strangled.net

  • primary_dns_server

  • 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

    1.2.1.1

  • wan_timeout

    8000

Signatures

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • NanoCore

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

  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe
    "C:\Users\Admin\AppData\Local\Temp\ca0fe1d580e881e6908aced30a49c9f48cd8ea14c769571b1a60bd8eee033102.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4804
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:2076

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/2076-133-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2076-134-0x0000000074D60000-0x0000000075311000-memory.dmp

          Filesize

          5.7MB

        • memory/2076-135-0x0000000074D60000-0x0000000075311000-memory.dmp

          Filesize

          5.7MB