Resubmissions

04-11-2024 10:50

241104-mxgdbsyfmh 10

04-11-2024 10:46

241104-mvgajszamq 8

Analysis

  • max time kernel
    118s
  • max time network
    299s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04-11-2024 10:50

General

  • Target

    RFQ_PO_091232.rtf

  • Size

    825KB

  • MD5

    666036634de5de5ff28819cec19299f3

  • SHA1

    4cb3fb08d6a173e1526f48d1d4237c29f9a49f5f

  • SHA256

    ff221c26a6ad233a179ede24b8156649e2e4338af867571943a2f114650bffa2

  • SHA512

    6f8ede92bcc457c2bc07f3ad15a33799d288b4eb6d56f1b8b44517c36373d35a4fe1e4804e90f5069ccfa400731cd172997ac23a154cbf3640fe5da355fb8eac

  • SSDEEP

    6144:HcwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAYwAjjFkYwsQ+jGnThT:2

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
  • Blocklisted process makes network request 1 IoCs
  • 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.

  • Downloads MZ/PE file
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • 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: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\RFQ_PO_091232.rtf"
    1⤵
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1684
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1776
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • System Location Discovery: System Language Discovery
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:2984
      • C:\Users\Admin\AppData\Roaming\jequduhalcat.exe
        "C:\Users\Admin\AppData\Roaming\jequduhalcat.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2740
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\jequduhalcat.exe"
          3⤵
          • Command and Scripting Interpreter: PowerShell
          • Drops file in System32 directory
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:940
        • C:\Users\Admin\AppData\Roaming\jequduhalcat.exe
          "C:\Users\Admin\AppData\Roaming\jequduhalcat.exe"
          3⤵
          • Executes dropped EXE
          PID:1108
        • C:\Users\Admin\AppData\Roaming\jequduhalcat.exe
          "C:\Users\Admin\AppData\Roaming\jequduhalcat.exe"
          3⤵
          • Executes dropped EXE
          PID:840
        • C:\Users\Admin\AppData\Roaming\jequduhalcat.exe
          "C:\Users\Admin\AppData\Roaming\jequduhalcat.exe"
          3⤵
          • Executes dropped EXE
          PID:2016
        • C:\Users\Admin\AppData\Roaming\jequduhalcat.exe
          "C:\Users\Admin\AppData\Roaming\jequduhalcat.exe"
          3⤵
          • Executes dropped EXE
          • 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:2256
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "SCSI Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmpAD6F.tmp"
            4⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:2040
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks.exe" /create /f /tn "SCSI Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpADDD.tmp"
            4⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:1996

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmpAD6F.tmp

      Filesize

      1KB

      MD5

      bd591eebe11d193e29c078323f5b9b8b

      SHA1

      6a093fab046422f4b4501a6db734ec6f9dabf299

      SHA256

      0ac67ad4c63b9736d0c07363874a11a1aa6038dbfc757b373e992c48b82ff7c7

      SHA512

      49045eacf3f2f676bd76c9db9ace132a35c093dad1fb4bdb1d7f04a87220fe1197472244b8b1bce705d2acf5de4f35a9c80bbe8b000f7cb5c5c74de536e70b51

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

      Filesize

      1KB

      MD5

      9a559f229be0944bc3dc813cde333f50

      SHA1

      0e97c97eea032b499ff060e799581e32beeceb09

      SHA256

      a63d853679aa655cced3b62a10855c56f9efd9b50770738b408d728008f73330

      SHA512

      4cbb2f77283500e86ecf79fd2cbd31d10c3af2fcf6c9a557ee0b1edead229dc07d63a5030b60df57458d52ef8c2a42ec199d2d4cdca387400d047df25b593c68

    • \Users\Admin\AppData\Roaming\jequduhalcat.exe

      Filesize

      720KB

      MD5

      782965f857a2c2dbc179b7e016386f61

      SHA1

      3d16a97e2733daa4c2313035e134e763497bb948

      SHA256

      2634af4fb7d0c056e1f96809592bfcd3ee9f3fedf0ad52f9340b67d3b67d9f0a

      SHA512

      a1c98f6c20b9b5692069ac79d43ed06481faf963da10ad24b83bf4d76c44db2fca87e5237205be1767b83781ea63e0d8993dfc86bb08743e6756482771e01272

    • memory/1684-0-0x000000002F371000-0x000000002F372000-memory.dmp

      Filesize

      4KB

    • memory/1684-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

      Filesize

      64KB

    • memory/1684-2-0x000000007180D000-0x0000000071818000-memory.dmp

      Filesize

      44KB

    • memory/1684-21-0x000000007180D000-0x0000000071818000-memory.dmp

      Filesize

      44KB

    • memory/2256-40-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2256-52-0x00000000004D0000-0x00000000004DA000-memory.dmp

      Filesize

      40KB

    • memory/2256-38-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2256-36-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2256-35-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2256-33-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2256-31-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2256-29-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2256-27-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2256-65-0x0000000004350000-0x0000000004364000-memory.dmp

      Filesize

      80KB

    • memory/2256-64-0x0000000004EE0000-0x0000000004F0E000-memory.dmp

      Filesize

      184KB

    • memory/2256-50-0x0000000000460000-0x000000000046A000-memory.dmp

      Filesize

      40KB

    • memory/2256-51-0x0000000000470000-0x000000000048E000-memory.dmp

      Filesize

      120KB

    • memory/2256-63-0x0000000004230000-0x000000000423E000-memory.dmp

      Filesize

      56KB

    • memory/2256-55-0x0000000000500000-0x0000000000512000-memory.dmp

      Filesize

      72KB

    • memory/2256-56-0x00000000005C0000-0x00000000005DA000-memory.dmp

      Filesize

      104KB

    • memory/2256-57-0x0000000000570000-0x000000000057E000-memory.dmp

      Filesize

      56KB

    • memory/2256-59-0x00000000020B0000-0x00000000020BE000-memory.dmp

      Filesize

      56KB

    • memory/2256-58-0x00000000007F0000-0x0000000000802000-memory.dmp

      Filesize

      72KB

    • memory/2256-60-0x00000000020C0000-0x00000000020D4000-memory.dmp

      Filesize

      80KB

    • memory/2256-61-0x0000000002110000-0x0000000002120000-memory.dmp

      Filesize

      64KB

    • memory/2256-62-0x0000000002120000-0x0000000002134000-memory.dmp

      Filesize

      80KB

    • memory/2740-23-0x0000000000690000-0x000000000070A000-memory.dmp

      Filesize

      488KB

    • memory/2740-15-0x00000000001B0000-0x000000000026A000-memory.dmp

      Filesize

      744KB

    • memory/2740-20-0x00000000003B0000-0x00000000003CC000-memory.dmp

      Filesize

      112KB