Analysis

  • max time kernel
    112s
  • max time network
    162s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231127-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/11/2023, 16:41

General

  • Target

    e3f6a75a8004412643549e095af1150d8329a3c46a06aef839842b90d54933a5exe.exe

  • Size

    654KB

  • MD5

    d0cc28fddecca60c208ae56d78014e95

  • SHA1

    34069e3897de6509b630f9b65b067ae9a74baffc

  • SHA256

    e3f6a75a8004412643549e095af1150d8329a3c46a06aef839842b90d54933a5

  • SHA512

    68626b0f448af738fdc41b4c8f71adb956d6ea29e5cd843ad71902b59f6beee88b42805ee50387749b05f2a019f56f45b2efa443883c6d7afd9edcc66d518d80

  • SSDEEP

    12288:wEg7SnvSNDeJDeR9p36kn3nqoMyOw3ZguCvvUH4qtQJ3aPjSEIOLusQmbCpi3U:wEg+vODyDIX36k3uA3Z3Cny4qt8aP2Ey

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

rn72836.sytes.net:6696

127.0.0.1:6696

Mutex

3f30b298-001f-4f08-b22c-606b0d3632bd

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2023-09-08T19:00:17.997607436Z

  • 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

    6696

  • default_group

    rn728

  • 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

    3f30b298-001f-4f08-b22c-606b0d3632bd

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    rn72836.sytes.net

  • 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
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e3f6a75a8004412643549e095af1150d8329a3c46a06aef839842b90d54933a5exe.exe
    "C:\Users\Admin\AppData\Local\Temp\e3f6a75a8004412643549e095af1150d8329a3c46a06aef839842b90d54933a5exe.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2548
    • C:\Users\Admin\AppData\Local\Temp\e3f6a75a8004412643549e095af1150d8329a3c46a06aef839842b90d54933a5exe.exe
      "C:\Users\Admin\AppData\Local\Temp\e3f6a75a8004412643549e095af1150d8329a3c46a06aef839842b90d54933a5exe.exe"
      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
      • Suspicious use of WriteProcessMemory
      PID:4856
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DHCP Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp196A.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:3836
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DHCP Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp21F6.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:2496

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp196A.tmp

          Filesize

          1KB

          MD5

          875dc87e150d02c32fff4a9b93e2c597

          SHA1

          5fcabd949c2819d092fc8ebccb9f5ccd643cc414

          SHA256

          aba11d13c09cfc9704e52c7d9704a4eca16276e26f172d3853b78fc3c525e09a

          SHA512

          5780dbd6401991302f6b45e5b3ed9f929b3b6a4d93b0dd95f0800fee9a55912b942bb08929c3605f0fe9bb285a43719f7d4893344ad3999ce71683a4878d3b2f

        • C:\Users\Admin\AppData\Local\Temp\tmp21F6.tmp

          Filesize

          1KB

          MD5

          cdf5683344404764a0f3592e9db8a5a1

          SHA1

          6705943b404de237cdd7080c05af25e2b1b6410c

          SHA256

          1ea0af7c86be3e61c281ada0470c6dcf178834380def1903b5bb78b49440ffff

          SHA512

          23c56873ca8520784cc1d6b0b4211b373fff6fb429872932e5274801d3b9d786566877cd16d1ffa0adca8c7aebb0b935701a0c071073edfbdb319002f99a182b

        • memory/2548-9-0x00000000046C0000-0x00000000046CA000-memory.dmp

          Filesize

          40KB

        • memory/2548-17-0x0000000074FC0000-0x0000000075770000-memory.dmp

          Filesize

          7.7MB

        • memory/2548-4-0x0000000004EE0000-0x0000000005234000-memory.dmp

          Filesize

          3.3MB

        • memory/2548-5-0x0000000004ED0000-0x0000000004EE0000-memory.dmp

          Filesize

          64KB

        • memory/2548-6-0x0000000004E40000-0x0000000004E4A000-memory.dmp

          Filesize

          40KB

        • memory/2548-7-0x0000000005990000-0x00000000059AA000-memory.dmp

          Filesize

          104KB

        • memory/2548-8-0x00000000065B0000-0x00000000065B8000-memory.dmp

          Filesize

          32KB

        • memory/2548-0-0x0000000074FC0000-0x0000000075770000-memory.dmp

          Filesize

          7.7MB

        • memory/2548-10-0x0000000006A70000-0x0000000006AE2000-memory.dmp

          Filesize

          456KB

        • memory/2548-11-0x0000000006B80000-0x0000000006C1C000-memory.dmp

          Filesize

          624KB

        • memory/2548-1-0x00000000001E0000-0x000000000028A000-memory.dmp

          Filesize

          680KB

        • memory/2548-3-0x0000000004C80000-0x0000000004D12000-memory.dmp

          Filesize

          584KB

        • memory/2548-14-0x0000000074FC0000-0x0000000075770000-memory.dmp

          Filesize

          7.7MB

        • memory/2548-2-0x0000000005340000-0x00000000058E4000-memory.dmp

          Filesize

          5.6MB

        • memory/4856-25-0x00000000064B0000-0x00000000064BA000-memory.dmp

          Filesize

          40KB

        • memory/4856-35-0x00000000070D0000-0x00000000070DC000-memory.dmp

          Filesize

          48KB

        • memory/4856-13-0x0000000074FC0000-0x0000000075770000-memory.dmp

          Filesize

          7.7MB

        • memory/4856-12-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/4856-26-0x0000000006540000-0x000000000655E000-memory.dmp

          Filesize

          120KB

        • memory/4856-27-0x0000000006680000-0x000000000668A000-memory.dmp

          Filesize

          40KB

        • memory/4856-30-0x0000000006F20000-0x0000000006F32000-memory.dmp

          Filesize

          72KB

        • memory/4856-31-0x0000000006F30000-0x0000000006F4A000-memory.dmp

          Filesize

          104KB

        • memory/4856-32-0x00000000070A0000-0x00000000070AE000-memory.dmp

          Filesize

          56KB

        • memory/4856-33-0x00000000070B0000-0x00000000070C2000-memory.dmp

          Filesize

          72KB

        • memory/4856-34-0x00000000070C0000-0x00000000070CE000-memory.dmp

          Filesize

          56KB

        • memory/4856-16-0x00000000054B0000-0x00000000054C0000-memory.dmp

          Filesize

          64KB

        • memory/4856-36-0x00000000070E0000-0x00000000070F4000-memory.dmp

          Filesize

          80KB

        • memory/4856-37-0x00000000070F0000-0x0000000007100000-memory.dmp

          Filesize

          64KB

        • memory/4856-38-0x0000000007110000-0x0000000007124000-memory.dmp

          Filesize

          80KB

        • memory/4856-39-0x0000000007130000-0x000000000713E000-memory.dmp

          Filesize

          56KB

        • memory/4856-40-0x0000000007140000-0x000000000716E000-memory.dmp

          Filesize

          184KB

        • memory/4856-41-0x0000000007170000-0x0000000007184000-memory.dmp

          Filesize

          80KB

        • memory/4856-42-0x0000000007210000-0x0000000007276000-memory.dmp

          Filesize

          408KB

        • memory/4856-44-0x0000000074FC0000-0x0000000075770000-memory.dmp

          Filesize

          7.7MB

        • memory/4856-45-0x00000000054B0000-0x00000000054C0000-memory.dmp

          Filesize

          64KB