Analysis

  • max time kernel
    4294208s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20220311-en
  • submitted
    14-04-2022 11:52

General

  • Target

    d48b7e4c2955e6764ab696429590bed38b4afa9b4d49a103e99a61314825e9cd.exe

  • Size

    456KB

  • MD5

    f8dbb51b18bc60d943da14368a5d6c58

  • SHA1

    fae8de8cc751859d7498b8e28104b462beca0a96

  • SHA256

    d48b7e4c2955e6764ab696429590bed38b4afa9b4d49a103e99a61314825e9cd

  • SHA512

    1e5284515b33a4de8ee00833d2cd8073bf762fca530fba950d71849773a00492b60f126a77ac4d3df01ce8b09b25abcc00419aa41efbedb20edbf45d9090ecc0

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

farah99.zapto.org:19720

Mutex

6d50c134-6325-499c-b5ec-dbc7a37a8117

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    farah99.zapto.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-08-20T23:36:09.518759436Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    19720

  • 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

    6d50c134-6325-499c-b5ec-dbc7a37a8117

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    farah99.zapto.org

  • 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.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • 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). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d48b7e4c2955e6764ab696429590bed38b4afa9b4d49a103e99a61314825e9cd.exe
    "C:\Users\Admin\AppData\Local\Temp\d48b7e4c2955e6764ab696429590bed38b4afa9b4d49a103e99a61314825e9cd.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1304
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\okLTHuziq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp847B.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:984
    • C:\Users\Admin\AppData\Local\Temp\d48b7e4c2955e6764ab696429590bed38b4afa9b4d49a103e99a61314825e9cd.exe
      "{path}"
      2⤵
        PID:1524
      • C:\Users\Admin\AppData\Local\Temp\d48b7e4c2955e6764ab696429590bed38b4afa9b4d49a103e99a61314825e9cd.exe
        "{path}"
        2⤵
          PID:1160
        • C:\Users\Admin\AppData\Local\Temp\d48b7e4c2955e6764ab696429590bed38b4afa9b4d49a103e99a61314825e9cd.exe
          "{path}"
          2⤵
            PID:1664
          • C:\Users\Admin\AppData\Local\Temp\d48b7e4c2955e6764ab696429590bed38b4afa9b4d49a103e99a61314825e9cd.exe
            "{path}"
            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:1540

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp847B.tmp

          Filesize

          1KB

          MD5

          b9b1368d47dd3aa0119ced6714162967

          SHA1

          70095e7067a0dfa91eadfa1e8527488b319d697f

          SHA256

          0e41c961415069a58de410c8dfa7e91745719f48483791b817813b7c7cfef6ba

          SHA512

          8b3c5c2e93e48b0de86b7abc480038d1176732239a97df42b7f5a5a8041dcffd058ad452c24b00c58a96fea89f9e94058b42947ee0eeb1540bc15ab3ce3688ca

        • memory/1304-54-0x00000000000B0000-0x0000000000128000-memory.dmp

          Filesize

          480KB

        • memory/1304-55-0x0000000000510000-0x000000000052C000-memory.dmp

          Filesize

          112KB

        • memory/1304-56-0x00000000050E0000-0x0000000005144000-memory.dmp

          Filesize

          400KB

        • memory/1540-63-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1540-60-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1540-62-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1540-59-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1540-65-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1540-68-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1540-70-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1540-71-0x0000000000530000-0x000000000053A000-memory.dmp

          Filesize

          40KB

        • memory/1540-72-0x00000000005E0000-0x00000000005FE000-memory.dmp

          Filesize

          120KB

        • memory/1540-73-0x0000000000540000-0x000000000054A000-memory.dmp

          Filesize

          40KB