Analysis

  • max time kernel
    118s
  • max time network
    158s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    05-11-2024 02:29

General

  • Target

    2634af4fb7d0c056e1f96809592bfcd3ee9f3fedf0ad52f9340b67d3b67d9f0a.exe

  • Size

    720KB

  • MD5

    782965f857a2c2dbc179b7e016386f61

  • SHA1

    3d16a97e2733daa4c2313035e134e763497bb948

  • SHA256

    2634af4fb7d0c056e1f96809592bfcd3ee9f3fedf0ad52f9340b67d3b67d9f0a

  • SHA512

    a1c98f6c20b9b5692069ac79d43ed06481faf963da10ad24b83bf4d76c44db2fca87e5237205be1767b83781ea63e0d8993dfc86bb08743e6756482771e01272

  • SSDEEP

    12288:2lx+dhZfm1NjNJrhCByke+7/wrhQUKLxfguWTe/OSzT7Ad9hg7pzm9owtSE3:w+d/f+Njt+7IrylxfguWTelK39oL

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

66.63.187.113:1664

Mutex

a376f716-2f77-4943-a431-3a3bcb53b7c0

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    66.63.187.113

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2024-08-05T03:49:33.827385136Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1664

  • default_group

    CAT

  • 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

    a376f716-2f77-4943-a431-3a3bcb53b7c0

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    66.63.187.113

  • 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.

  • Nanocore family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2634af4fb7d0c056e1f96809592bfcd3ee9f3fedf0ad52f9340b67d3b67d9f0a.exe
    "C:\Users\Admin\AppData\Local\Temp\2634af4fb7d0c056e1f96809592bfcd3ee9f3fedf0ad52f9340b67d3b67d9f0a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1708
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\2634af4fb7d0c056e1f96809592bfcd3ee9f3fedf0ad52f9340b67d3b67d9f0a.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2808
    • C:\Users\Admin\AppData\Local\Temp\2634af4fb7d0c056e1f96809592bfcd3ee9f3fedf0ad52f9340b67d3b67d9f0a.exe
      "C:\Users\Admin\AppData\Local\Temp\2634af4fb7d0c056e1f96809592bfcd3ee9f3fedf0ad52f9340b67d3b67d9f0a.exe"
      2⤵
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2840
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "ISS Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmpF90E.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:1880
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "ISS Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpFC4A.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2180

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpF90E.tmp

    Filesize

    1KB

    MD5

    df4d0e9c3f264d12150e22239d449c59

    SHA1

    90649a3bb8a2853535b8944966adf577192f6698

    SHA256

    2d2ad709a852677b5174d6831d875fd009a38a7df6d8e4b17b97beff2a3d5550

    SHA512

    59110fb883f45870a5e482f1c3c0344707cd9466e56867818fa0c652f8faa145fa423d34b0ee36a4457cd142b94acc693b1a9ed8f853bccb39dc08826797a469

  • C:\Users\Admin\AppData\Local\Temp\tmpFC4A.tmp

    Filesize

    1KB

    MD5

    3d1580c0395f6de62659467f5b7f1acf

    SHA1

    8e73a3885896cecca7ff799a272fc9ddfe06ea96

    SHA256

    6f40196c42a171f24a3e16edeca664cdc5a2f7c150d468255b0e14ab10a2b714

    SHA512

    7637c0d9b03227dffcb00a68d97ddce60bfc40ca0f8a7a4bbd700ea56be6d570908511dea5cab9f609a7da2e558e5298c482fd1e330af085f9c52867d5a847ea

  • memory/1708-20-0x0000000074270000-0x000000007495E000-memory.dmp

    Filesize

    6.9MB

  • memory/1708-1-0x0000000000860000-0x000000000091A000-memory.dmp

    Filesize

    744KB

  • memory/1708-2-0x0000000074270000-0x000000007495E000-memory.dmp

    Filesize

    6.9MB

  • memory/1708-3-0x0000000000480000-0x000000000049C000-memory.dmp

    Filesize

    112KB

  • memory/1708-4-0x000000007427E000-0x000000007427F000-memory.dmp

    Filesize

    4KB

  • memory/1708-5-0x0000000074270000-0x000000007495E000-memory.dmp

    Filesize

    6.9MB

  • memory/1708-6-0x0000000000530000-0x00000000005AA000-memory.dmp

    Filesize

    488KB

  • memory/1708-0-0x000000007427E000-0x000000007427F000-memory.dmp

    Filesize

    4KB

  • memory/2840-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2840-36-0x0000000000720000-0x000000000073A000-memory.dmp

    Filesize

    104KB

  • memory/2840-8-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2840-7-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2840-17-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2840-18-0x0000000074270000-0x000000007495E000-memory.dmp

    Filesize

    6.9MB

  • memory/2840-10-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2840-19-0x0000000074270000-0x000000007495E000-memory.dmp

    Filesize

    6.9MB

  • memory/2840-13-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2840-15-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2840-30-0x0000000000470000-0x000000000047A000-memory.dmp

    Filesize

    40KB

  • memory/2840-31-0x0000000000480000-0x000000000049E000-memory.dmp

    Filesize

    120KB

  • memory/2840-32-0x00000000004A0000-0x00000000004AA000-memory.dmp

    Filesize

    40KB

  • memory/2840-9-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2840-35-0x0000000000710000-0x0000000000722000-memory.dmp

    Filesize

    72KB

  • memory/2840-38-0x00000000020E0000-0x00000000020F2000-memory.dmp

    Filesize

    72KB

  • memory/2840-37-0x0000000000750000-0x000000000075E000-memory.dmp

    Filesize

    56KB

  • memory/2840-39-0x0000000002140000-0x000000000214E000-memory.dmp

    Filesize

    56KB

  • memory/2840-41-0x00000000021A0000-0x00000000021B0000-memory.dmp

    Filesize

    64KB

  • memory/2840-40-0x0000000002190000-0x00000000021A4000-memory.dmp

    Filesize

    80KB

  • memory/2840-42-0x00000000042D0000-0x00000000042E4000-memory.dmp

    Filesize

    80KB

  • memory/2840-44-0x0000000004330000-0x000000000435E000-memory.dmp

    Filesize

    184KB

  • memory/2840-45-0x00000000043B0000-0x00000000043C4000-memory.dmp

    Filesize

    80KB

  • memory/2840-43-0x0000000004320000-0x000000000432E000-memory.dmp

    Filesize

    56KB

  • memory/2840-47-0x0000000074270000-0x000000007495E000-memory.dmp

    Filesize

    6.9MB

  • memory/2840-48-0x0000000074270000-0x000000007495E000-memory.dmp

    Filesize

    6.9MB