Analysis

  • max time kernel
    69s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/11/2022, 06:46

General

  • Target

    9c8b27cd0131c5451b869eebce9518bf.exe

  • Size

    7KB

  • MD5

    9c8b27cd0131c5451b869eebce9518bf

  • SHA1

    860890fd1df703774615faca15ee9102405f16bb

  • SHA256

    9d9f2c64c077d3240f88906f3e73559c5bf554809a1e8974f8c8f28704c576ea

  • SHA512

    82f7d7fff8cf29af2f6230daa258d48d206cc8ad4c6efdc90cf4b01ed3b0bf1f892230faa01a3e7bbb9fcc853a59d2641179338f61a759b0a289c4f9935635f1

  • SSDEEP

    96:daIzZKMDduv8msmvlIiLrTXTWBkYPe2OpDOlk23v9zNt:daw0xvXsmKiLrykY22OpDOe23

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

maxlogs.webhop.me:1620

Mutex

9d764268-05c2-4a8e-8c39-b4db356d4640

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-05-29T07:34:04.203922136Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1620

  • default_group

    x

  • 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

    9d764268-05c2-4a8e-8c39-b4db356d4640

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    maxlogs.webhop.me

  • 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
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 7 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\9c8b27cd0131c5451b869eebce9518bf.exe
    "C:\Users\Admin\AppData\Local\Temp\9c8b27cd0131c5451b869eebce9518bf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2112
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      2⤵
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:540

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/540-138-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/540-139-0x0000000005760000-0x00000000057FC000-memory.dmp

          Filesize

          624KB

        • memory/540-140-0x0000000006F10000-0x0000000006F76000-memory.dmp

          Filesize

          408KB

        • memory/2112-132-0x0000000000FE0000-0x0000000000FE8000-memory.dmp

          Filesize

          32KB

        • memory/2112-133-0x0000000006090000-0x0000000006634000-memory.dmp

          Filesize

          5.6MB

        • memory/2112-134-0x00000000059C0000-0x0000000005A52000-memory.dmp

          Filesize

          584KB

        • memory/2112-135-0x0000000005990000-0x000000000599A000-memory.dmp

          Filesize

          40KB

        • memory/2112-136-0x000000000B330000-0x000000000B352000-memory.dmp

          Filesize

          136KB