Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    26/12/2023, 18:28

General

  • Target

    842950d234e691ae98c2ce548ec471a3.exe

  • Size

    670KB

  • MD5

    842950d234e691ae98c2ce548ec471a3

  • SHA1

    989a1fe9ee1343ff2c3bd90671288ad419d772ed

  • SHA256

    ccd3c74e9ed1c416ff89568cd58ba4a0f1ea29effb821795c405a7cfd706571c

  • SHA512

    3379ee9dfd0096ce34d063c86e557b4f4350d9f37d56cd022f91db75c80d30b9fd007493df9131f0b3f222bd7b48def2f7a05608dc96745921d06a5453738980

  • SSDEEP

    12288:BaSkWUxIiboWxvZvL62yy+Uc4d4Aj+z3a5oYnRT+oW7e5rnk6bUS3a:kSkWUMeLd

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

xp18.ddns.net:1012

Mutex

ef6b2072-3b38-4899-b925-378df7ad2d73

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    xp18.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-04-23T05:59:24.479035036Z

  • 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

    1012

  • 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

    ef6b2072-3b38-4899-b925-378df7ad2d73

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    xp18.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.

  • Adds Run key to start application 2 TTPs 1 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.

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\842950d234e691ae98c2ce548ec471a3.exe
    "C:\Users\Admin\AppData\Local\Temp\842950d234e691ae98c2ce548ec471a3.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Users\Admin\AppData\Local\Temp\842950d234e691ae98c2ce548ec471a3.exe
      "{path}"
      2⤵
      • 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:2708
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "LAN Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmpF27A.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:2500
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "LAN Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpF393.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:528

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmpF27A.tmp

          Filesize

          1KB

          MD5

          e6a52dad7ef118c0dea68e7a3ea26d4a

          SHA1

          b5ceb4375ba7e8dfcd5baec0a721fd3d430d7099

          SHA256

          5f56cd8fb22ef8af629c687f0e06cf6fb763235770ffa7e29f452a20d388b046

          SHA512

          0bf7856e1ccc3bcd2a92c837afded1e2e02fc541f1793159e577eb21f815a388ecbcfb6c6feb908567f05149b952d0c85e6e957331d725fde676c25ec9bf2ee8

        • C:\Users\Admin\AppData\Local\Temp\tmpF393.tmp

          Filesize

          1KB

          MD5

          ecf141ec69adbb2a5c3dd5c85cd0ec39

          SHA1

          0ad224632fa58d103142c05c44a142f3d7208291

          SHA256

          64d8cfa0b25afee269839cd5fc0b66e5643bc318e5f4d3ce1b9dba2456c83316

          SHA512

          4821b062d6672f3ed07833cfd7ab9abb533850b451b632d781fbfad8238fcd5ac52855f1f239547ae2d1c1477959f022430302a75cfd3c19a8473af72a1ef201

        • memory/2208-0-0x0000000074D90000-0x000000007533B000-memory.dmp

          Filesize

          5.7MB

        • memory/2208-2-0x0000000000550000-0x0000000000590000-memory.dmp

          Filesize

          256KB

        • memory/2208-1-0x0000000074D90000-0x000000007533B000-memory.dmp

          Filesize

          5.7MB

        • memory/2208-3-0x0000000074D90000-0x000000007533B000-memory.dmp

          Filesize

          5.7MB

        • memory/2208-4-0x0000000000550000-0x0000000000590000-memory.dmp

          Filesize

          256KB

        • memory/2208-17-0x0000000074D90000-0x000000007533B000-memory.dmp

          Filesize

          5.7MB

        • memory/2708-15-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2708-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

          Filesize

          4KB

        • memory/2708-11-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2708-9-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2708-18-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2708-20-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2708-21-0x0000000074D10000-0x00000000752BB000-memory.dmp

          Filesize

          5.7MB

        • memory/2708-22-0x0000000002290000-0x00000000022D0000-memory.dmp

          Filesize

          256KB

        • memory/2708-23-0x0000000074D10000-0x00000000752BB000-memory.dmp

          Filesize

          5.7MB

        • memory/2708-7-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2708-5-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2708-31-0x0000000074D10000-0x00000000752BB000-memory.dmp

          Filesize

          5.7MB

        • memory/2708-32-0x0000000002290000-0x00000000022D0000-memory.dmp

          Filesize

          256KB