Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-05-2024 20:20

General

  • Target

    pdf.exe

  • Size

    661KB

  • MD5

    622d432561004acfc474b3eb679b3c57

  • SHA1

    54ac325a2f36fd1f804b6db6a69e73e6fbd6b83d

  • SHA256

    cac9f27ac564c17317125db57af909b78a9134edc9992bc573f624666775fd66

  • SHA512

    4f37a0c6e8f62ca7f5ab88c8ce0039bde074e1394b6086a93f9cc47461ebc34d1cfc03646414435d26bc1283358a0aa31892a784ce4dff3ee3229b4954a92e1f

  • SSDEEP

    12288:Pug52mXIrcT6Ne9vWtxgsGGNrNqUgcvyluD9otjt6gX4d0LCy:mgnXmVBJN28kjjtId0L

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

185.217.1.176:555

127.0.0.1:555

Mutex

bd5c416c-71f5-4d6b-8bd1-843e849fe681

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2019-04-25T19:44:35.733601436Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    555

  • default_group

    AAAAA

  • 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

    bd5c416c-71f5-4d6b-8bd1-843e849fe681

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    185.217.1.176

  • 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
  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2116
    • C:\Users\Admin\AppData\Local\Temp\pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\pdf.exe"
      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
      PID:3308

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2116-0-0x0000000074C32000-0x0000000074C33000-memory.dmp

    Filesize

    4KB

  • memory/2116-1-0x0000000074C30000-0x00000000751E1000-memory.dmp

    Filesize

    5.7MB

  • memory/2116-2-0x0000000074C30000-0x00000000751E1000-memory.dmp

    Filesize

    5.7MB

  • memory/2116-3-0x0000000074C32000-0x0000000074C33000-memory.dmp

    Filesize

    4KB

  • memory/2116-4-0x0000000074C30000-0x00000000751E1000-memory.dmp

    Filesize

    5.7MB

  • memory/2116-8-0x0000000074C30000-0x00000000751E1000-memory.dmp

    Filesize

    5.7MB

  • memory/3308-5-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/3308-9-0x0000000074C30000-0x00000000751E1000-memory.dmp

    Filesize

    5.7MB

  • memory/3308-7-0x0000000074C30000-0x00000000751E1000-memory.dmp

    Filesize

    5.7MB

  • memory/3308-12-0x0000000074C30000-0x00000000751E1000-memory.dmp

    Filesize

    5.7MB

  • memory/3308-13-0x0000000074C30000-0x00000000751E1000-memory.dmp

    Filesize

    5.7MB

  • memory/3308-14-0x0000000074C30000-0x00000000751E1000-memory.dmp

    Filesize

    5.7MB