Analysis

  • max time kernel
    150s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    05-08-2024 00:39

General

  • Target

    98d5e4539d010d7fcfb6aa3d8d9b117f4f03ffb743f6fe345ef2c8ff7134e8d8.exe

  • Size

    282KB

  • MD5

    930b881844c3567acf81f0965fa35975

  • SHA1

    559d769f6d6205ff6a2d3a206467ea5cb883fa17

  • SHA256

    98d5e4539d010d7fcfb6aa3d8d9b117f4f03ffb743f6fe345ef2c8ff7134e8d8

  • SHA512

    e33dbeac484de2937d82eda3471fa38cfcea8f59bff12c165a19151c5517940c6365c245dc954f1df9ee19025f8b151f3210b5259e0497d0f6ddf3fa2ac8881b

  • SSDEEP

    6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkfP:boSeGUA5YZazpXUmZhZ6Su

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

sysupdate24.ddns.net:45400

Mutex

ae82ab7f-db07-49ee-9d2b-76075d76f37f

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

  • buffer_size

    65535

  • build_time

    2020-04-24T17:41:53.492468936Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    45400

  • 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

    ae82ab7f-db07-49ee-9d2b-76075d76f37f

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    sysupdate24.ddns.net

  • primary_dns_server

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    true

  • 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.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\98d5e4539d010d7fcfb6aa3d8d9b117f4f03ffb743f6fe345ef2c8ff7134e8d8.exe
    "C:\Users\Admin\AppData\Local\Temp\98d5e4539d010d7fcfb6aa3d8d9b117f4f03ffb743f6fe345ef2c8ff7134e8d8.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2120
    • C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
      "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2468
      • C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
        "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
        3⤵
        • Executes dropped EXE
        • Checks whether UAC is enabled
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:2612

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe

    Filesize

    282KB

    MD5

    49c1c8b69ccd93aabe88df99714f5701

    SHA1

    47bb331b05f29229f425a7cba8b2cdd4b56a0128

    SHA256

    ec5fdeb914f81e0b6a16b304a18c269a39bf88e6509479f2e8306c35729b09a5

    SHA512

    961f2968d024cd465e438ddd989d6debb7c91c241aa02b4f147e3de55f07c5f08717b155e30109fde251aec7dd4b7673996397c8f9819c26d6a5dc44bf6fe927

  • memory/2120-1-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2120-2-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2120-3-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2120-12-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2120-0-0x0000000074161000-0x0000000074162000-memory.dmp

    Filesize

    4KB

  • memory/2468-33-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2468-15-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2468-13-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2468-14-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2468-16-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2468-34-0x0000000074160000-0x000000007470B000-memory.dmp

    Filesize

    5.7MB

  • memory/2612-18-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2612-30-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2612-24-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2612-22-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2612-20-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2612-19-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2612-31-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2612-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB