Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    21-03-2023 14:40

General

  • Target

    fc45e859218d968355dab61237025b551710f8329c1e50cf10342826222c21bf.exe

  • Size

    405KB

  • MD5

    27b0bbbcfc777cf7245a2ae4f9d01b69

  • SHA1

    7a7f499a9cb5994f1135cb5935c3f6843962f15f

  • SHA256

    fc45e859218d968355dab61237025b551710f8329c1e50cf10342826222c21bf

  • SHA512

    9c69b9c103517ac1b93b59b4ff550225b09cef212d02dab7834fa6c63d75f7e05dc3f5f2a67810a6a8e83acf56e9af9aac3105f9736665f4a063d85d852a9d9e

  • SSDEEP

    12288:dnXcypamQ4HucawiYJPhjV1VxoMmwldE:NHuc9iW71VxXlu

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

williamscomputer101.ddns.net:16554

91.193.75.135:16554

Mutex

768970b2-01a6-4c33-a5ae-8582afdb6c49

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    91.193.75.135

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-11-30T13:00:18.988692336Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    16554

  • default_group

    Billionare

  • 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

    768970b2-01a6-4c33-a5ae-8582afdb6c49

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    williamscomputer101.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 2 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 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fc45e859218d968355dab61237025b551710f8329c1e50cf10342826222c21bf.exe
    "C:\Users\Admin\AppData\Local\Temp\fc45e859218d968355dab61237025b551710f8329c1e50cf10342826222c21bf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:928
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'RZTHXHelper';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'RZTHXHelper' -Value '"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\RZTHX\RZTHXHelper.exe"' -PropertyType 'String'
      2⤵
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:268
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe"
      2⤵
        PID:1648
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.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:564

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Persistence

    Registry Run Keys / Startup Folder

    1
    T1060

    Defense Evasion

    Modify Registry

    1
    T1112

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/564-84-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/564-101-0x0000000004C60000-0x0000000004CA0000-memory.dmp
      Filesize

      256KB

    • memory/564-100-0x0000000004C60000-0x0000000004CA0000-memory.dmp
      Filesize

      256KB

    • memory/564-99-0x00000000003F0000-0x00000000003FA000-memory.dmp
      Filesize

      40KB

    • memory/564-98-0x00000000004F0000-0x000000000050E000-memory.dmp
      Filesize

      120KB

    • memory/564-97-0x00000000003E0000-0x00000000003EA000-memory.dmp
      Filesize

      40KB

    • memory/564-93-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/564-91-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/564-89-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/564-87-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/564-85-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/564-88-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
      Filesize

      4KB

    • memory/564-86-0x0000000000400000-0x0000000000438000-memory.dmp
      Filesize

      224KB

    • memory/928-65-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-54-0x00000000009A0000-0x0000000000A06000-memory.dmp
      Filesize

      408KB

    • memory/928-81-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-77-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-79-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-73-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-75-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-69-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-71-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-83-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-67-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-94-0x0000000004A15000-0x0000000004A33000-memory.dmp
      Filesize

      120KB

    • memory/928-63-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-61-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-60-0x00000000003D0000-0x00000000003E5000-memory.dmp
      Filesize

      84KB

    • memory/928-59-0x00000000003D0000-0x00000000003EC000-memory.dmp
      Filesize

      112KB

    • memory/928-55-0x0000000004A10000-0x0000000004A50000-memory.dmp
      Filesize

      256KB