Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/01/2024, 06:21

General

  • Target

    7c5fefe93d62fc7ce29b236be8235197.exe

  • Size

    1.2MB

  • MD5

    7c5fefe93d62fc7ce29b236be8235197

  • SHA1

    882eabe9a067575521065329b923dc9fe61fa6d9

  • SHA256

    93e2ba272cce84fa13eac9b5f393e15a55c3719d59651c60bd3b8f27136fef59

  • SHA512

    38c75753e8fd7531111befcff012e5fea95863de95329ecff117d6989e4177b0b53a42857d14901f122e66b07d9207b907f8d7b9f6a1d9ce49eac1a10149c0a7

  • SSDEEP

    24576:9AHnh+eWsN3skA4RV1Hom2KXMmHaFZyrh9QI/C+EZCBqUIYXmf8MuvWzD:ch+ZkldoPK8YaFZyri7QPIYXLMr

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

megida.hopto.org:8822

Mutex

0622add8-a38b-49c1-8dc8-c09cf4320fc4

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2019-03-11T12:24:33.692689636Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    8822

  • default_group

    NewLappi

  • 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

    0622add8-a38b-49c1-8dc8-c09cf4320fc4

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    megida.hopto.org

  • primary_dns_server

    8.8.8.8

  • 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.

  • Drops startup file 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).

  • Suspicious behavior: EnumeratesProcesses 27 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7c5fefe93d62fc7ce29b236be8235197.exe
    "C:\Users\Admin\AppData\Local\Temp\7c5fefe93d62fc7ce29b236be8235197.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2772
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
      2⤵
        PID:4780
      • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
        "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
        2⤵
        • Checks whether UAC is enabled
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:2468

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/2468-4-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2468-5-0x0000000073280000-0x0000000073831000-memory.dmp

      Filesize

      5.7MB

    • memory/2468-6-0x0000000001280000-0x0000000001290000-memory.dmp

      Filesize

      64KB

    • memory/2468-7-0x0000000073280000-0x0000000073831000-memory.dmp

      Filesize

      5.7MB

    • memory/2468-9-0x0000000073280000-0x0000000073831000-memory.dmp

      Filesize

      5.7MB

    • memory/2468-10-0x0000000001280000-0x0000000001290000-memory.dmp

      Filesize

      64KB

    • memory/2468-11-0x0000000073280000-0x0000000073831000-memory.dmp

      Filesize

      5.7MB

    • memory/2772-3-0x0000000000C90000-0x0000000000C93000-memory.dmp

      Filesize

      12KB