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Analysis

  • max time kernel
    156s
  • max time network
    165s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/01/2024, 14:46

General

  • Target

    4bb71eeb1ef688efb7807a1c182691cb.exe

  • Size

    863KB

  • MD5

    4bb71eeb1ef688efb7807a1c182691cb

  • SHA1

    34329d26f0c014ca876906e268975778664db10c

  • SHA256

    8a0b3ba6dec891704a1ed2e31cae766491fa7e1acb5007a7acfcad32f9834a96

  • SHA512

    beb9afece303805a852656aab89b5e054c9a2c3a2848c7662a57d37da3f4c6d6d44a8aea89a8f70abfe600abc441b8effb7e10321c6c37e4b46fa5095c8a26de

  • SSDEEP

    24576:9omEXz/VmHV+Wha4xqbtbciqTyoHB17mo5oFCEkv:SmqU1doyqbtbUysHosv

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

185.244.30.238:1985

127.0.0.1:1985

Mutex

cd36de34-478d-427e-a222-53f75c55abae

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-05-08T22:16:27.321077136Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1985

  • default_group

    Kdott

  • 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

    cd36de34-478d-427e-a222-53f75c55abae

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    185.244.30.238

  • 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.

  • CustAttr .NET packer 1 IoCs

    Detects CustAttr .NET packer in memory.

  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4bb71eeb1ef688efb7807a1c182691cb.exe
    "C:\Users\Admin\AppData\Local\Temp\4bb71eeb1ef688efb7807a1c182691cb.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1776
    • C:\Users\Admin\AppData\Local\Temp\4bb71eeb1ef688efb7807a1c182691cb.exe
      "C:\Users\Admin\AppData\Local\Temp\4bb71eeb1ef688efb7807a1c182691cb.exe"
      2⤵
        PID:4980

    Network

    MITRE ATT&CK Matrix

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1776-8-0x0000000005BA0000-0x0000000005BF6000-memory.dmp

      Filesize

      344KB

    • memory/1776-9-0x00000000055C0000-0x00000000055D0000-memory.dmp

      Filesize

      64KB

    • memory/1776-2-0x0000000005690000-0x000000000572C000-memory.dmp

      Filesize

      624KB

    • memory/1776-3-0x0000000005CE0000-0x0000000006284000-memory.dmp

      Filesize

      5.6MB

    • memory/1776-4-0x0000000005730000-0x00000000057C2000-memory.dmp

      Filesize

      584KB

    • memory/1776-5-0x0000000075180000-0x0000000075930000-memory.dmp

      Filesize

      7.7MB

    • memory/1776-6-0x00000000055C0000-0x00000000055D0000-memory.dmp

      Filesize

      64KB

    • memory/1776-7-0x0000000005A20000-0x0000000005A2A000-memory.dmp

      Filesize

      40KB

    • memory/1776-1-0x0000000000B80000-0x0000000000C5E000-memory.dmp

      Filesize

      888KB

    • memory/1776-10-0x0000000005090000-0x00000000050A2000-memory.dmp

      Filesize

      72KB

    • memory/1776-0-0x0000000075180000-0x0000000075930000-memory.dmp

      Filesize

      7.7MB

    • memory/1776-11-0x0000000006C70000-0x0000000006CF6000-memory.dmp

      Filesize

      536KB

    • memory/1776-12-0x0000000005C90000-0x0000000005CCE000-memory.dmp

      Filesize

      248KB

    • memory/1776-17-0x0000000075180000-0x0000000075930000-memory.dmp

      Filesize

      7.7MB

    • memory/4980-14-0x0000000075180000-0x0000000075930000-memory.dmp

      Filesize

      7.7MB

    • memory/4980-15-0x0000000005250000-0x0000000005260000-memory.dmp

      Filesize

      64KB

    • memory/4980-13-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB