Analysis

  • max time kernel
    117s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-en-20211104
  • submitted
    12/11/2021, 00:17

General

  • Target
    Jessica Ohnesorge'CV.exe
  • Size 659KB
  • Sample211112-ak2saacdb9
  • SHA256 d0db3a18c0593a628f5c7e2a92b48369c10823af44d4f1e97f0bfbfd84043c59
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • dera31.ddns.net:1187

  • 195.133.18.211:1187

Mutex
  • f4157c11-54e5-4893-8a60-6856b8471d8c

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    195.133.18.211

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-08-13T08:45:25.192912336Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1187

  • 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

    f4157c11-54e5-4893-8a60-6856b8471d8c

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    dera31.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
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Jessica Ohnesorge'CV.exe
    "C:\Users\Admin\AppData\Local\Temp\Jessica Ohnesorge'CV.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1616
    • C:\Users\Admin\AppData\Local\Temp\Jessica Ohnesorge'CV.exe
      "C:\Users\Admin\AppData\Local\Temp\Jessica Ohnesorge'CV.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:572

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/572-57-0x0000000000400000-0x0000000000438000-memory.dmp

        memory/572-58-0x0000000000400000-0x0000000000438000-memory.dmp

        memory/572-59-0x0000000000400000-0x0000000000438000-memory.dmp

        memory/572-60-0x0000000000400000-0x0000000000438000-memory.dmp

        memory/572-61-0x0000000000400000-0x0000000000438000-memory.dmp

        memory/572-64-0x00000000009F0000-0x00000000009F1000-memory.dmp

        memory/1616-55-0x0000000076351000-0x0000000076353000-memory.dmp

        memory/1616-56-0x0000000000B30000-0x0000000000B31000-memory.dmp