Analysis

  • max time kernel
    152s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-10-2022 22:27

General

  • Target

    97d71c63bb6db84b28a9c3b591eba52dd76ae15a3c7b06c2409566d0c65211d7.exe

  • Size

    549KB

  • MD5

    600969332802cc63fb2d2e24b1f76480

  • SHA1

    8801e4feb678ecd1b711b4d3c420c15b4b38ffab

  • SHA256

    97d71c63bb6db84b28a9c3b591eba52dd76ae15a3c7b06c2409566d0c65211d7

  • SHA512

    18f9cfdbb0531c620685b088bd569c64fa82c5158b8b220d02dd04582da8e6a6507675ee74772660a1c3ec14ed964eed7dc87c0cd44fa29066b8de5815b67f15

  • SSDEEP

    12288:9n1jYssf65HQ8NJUpdD3nYGLi2LXoaxsLwIUf:9n1jYsq6hQ87mXLzL4aQof

Malware Config

Extracted

Family

nanocore

Version

1.2.2.2

C2

robbertwayne.no-ip.biz:55809

127.0.0.1:55809

Mutex

23414355-6598-4916-89e5-1dfb813410de

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2015-05-07T20:11:35.713773936Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    55809

  • default_group

    Decent

  • 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

    23414355-6598-4916-89e5-1dfb813410de

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    robbertwayne.no-ip.biz

  • 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

    1.2.2.2

  • 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 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\97d71c63bb6db84b28a9c3b591eba52dd76ae15a3c7b06c2409566d0c65211d7.exe
    "C:\Users\Admin\AppData\Local\Temp\97d71c63bb6db84b28a9c3b591eba52dd76ae15a3c7b06c2409566d0c65211d7.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3068
    • C:\Users\Admin\AppData\Local\Temp\97d71c63bb6db84b28a9c3b591eba52dd76ae15a3c7b06c2409566d0c65211d7.exe
      "C:\Users\Admin\AppData\Local\Temp\97d71c63bb6db84b28a9c3b591eba52dd76ae15a3c7b06c2409566d0c65211d7.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:4388
    • C:\Windows\SysWOW64\REG.exe
      REG ADD HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /V "ytrfyt" /t REG_SZ /F /D "C:\Users\Admin\AppData\Roaming\bugbuh.exe
      2⤵
      • Adds Run key to start application
      • Modifies registry key
      PID:4648

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Discovery

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3068-132-0x00000000747E0000-0x0000000074D91000-memory.dmp
    Filesize

    5.7MB

  • memory/3068-133-0x00000000747E0000-0x0000000074D91000-memory.dmp
    Filesize

    5.7MB

  • memory/3068-138-0x00000000747E0000-0x0000000074D91000-memory.dmp
    Filesize

    5.7MB

  • memory/4388-134-0x0000000000000000-mapping.dmp
  • memory/4388-135-0x0000000000400000-0x000000000047C000-memory.dmp
    Filesize

    496KB

  • memory/4388-136-0x00000000747E0000-0x0000000074D91000-memory.dmp
    Filesize

    5.7MB

  • memory/4388-139-0x00000000747E0000-0x0000000074D91000-memory.dmp
    Filesize

    5.7MB

  • memory/4648-137-0x0000000000000000-mapping.dmp