Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    14/11/2022, 18:46

General

  • Target

    85605a584d908e5a32d91767940f7aab.exe

  • Size

    907KB

  • MD5

    85605a584d908e5a32d91767940f7aab

  • SHA1

    4568b524b21c8cea9ae297ab782ac95a33a61e59

  • SHA256

    3f0a89e3647d4ff575fc0c8db1ea5e9f7dbf2c0041f90ec2ef26c7eab69b34f8

  • SHA512

    a43af329a798947bc8b2473436de1092f51b3ac23f0f562c59c4b263216d00d6a9b39b4e3a4255d00cb7dfaebcb26563be5df321b0f4d049071ec90c5cfd156e

  • SSDEEP

    12288:sANiU251k3btMOKdeyqo6x+UXndim70h+qrDMJ65AqQR1I9tWAlEsZqxJU2V8:sAToEhMVioctP70h+r0yqEspVqk2W

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

maxlogs.webhop.me:1620

Mutex

9d764268-05c2-4a8e-8c39-b4db356d4640

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-05-29T07:34:04.203922136Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1620

  • default_group

    x

  • 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

    9d764268-05c2-4a8e-8c39-b4db356d4640

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    maxlogs.webhop.me

  • 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 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). 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 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\85605a584d908e5a32d91767940f7aab.exe
    "C:\Users\Admin\AppData\Local\Temp\85605a584d908e5a32d91767940f7aab.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1100
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TztnPxRQQq" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6817.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1348
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      "{path}"
      2⤵
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:2044

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp6817.tmp

          Filesize

          1KB

          MD5

          dbad560061053f3ac9fdac7a020fd242

          SHA1

          fb1e829d9140aea21ac30bf6f29e8ce6f02a01db

          SHA256

          5b36c4b645ffada7f7f8e53cbbd2f64b22d997d4c4fe0632171c87e8e985724d

          SHA512

          dd65fe52bdd78f57528127dcee2eba0e484472188d824af606817e92733e2d31e8dc38f327953596bba0b1c7b8e8cfb0f8a1caf77e2a28cc8c076d068c3b59da

        • memory/1100-54-0x00000000012A0000-0x000000000138A000-memory.dmp

          Filesize

          936KB

        • memory/1100-55-0x00000000763F1000-0x00000000763F3000-memory.dmp

          Filesize

          8KB

        • memory/1100-56-0x00000000005D0000-0x00000000005E2000-memory.dmp

          Filesize

          72KB

        • memory/1100-57-0x0000000005700000-0x000000000578C000-memory.dmp

          Filesize

          560KB

        • memory/1100-58-0x0000000004CA0000-0x0000000004CDA000-memory.dmp

          Filesize

          232KB

        • memory/2044-62-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2044-61-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2044-64-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2044-65-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2044-67-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2044-70-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2044-72-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/2044-74-0x00000000003E0000-0x00000000003EA000-memory.dmp

          Filesize

          40KB

        • memory/2044-75-0x0000000000440000-0x000000000045E000-memory.dmp

          Filesize

          120KB

        • memory/2044-76-0x00000000003F0000-0x00000000003FA000-memory.dmp

          Filesize

          40KB

        • memory/2044-77-0x0000000004805000-0x0000000004816000-memory.dmp

          Filesize

          68KB