Analysis

  • max time kernel
    151s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/01/2024, 13:47

General

  • Target

    4662bc8b2cd5a9b9bfd3ebb0e2d45684.exe

  • Size

    1.3MB

  • MD5

    4662bc8b2cd5a9b9bfd3ebb0e2d45684

  • SHA1

    c915483639d5f13f908b6af3c0dab99acb804a14

  • SHA256

    3f283257101f1d8df573c4afce1addb1c48891a0ab6d278e64e84dabfad766d4

  • SHA512

    1dfeb049d9cdc627bc8410c0e63ab1651ff299e0838c88fbdac52d610cafaa29607744c4ad6a902608bb21f09fa4761b90ba7052e99698b0b31ea12cb99856f7

  • SSDEEP

    24576:yNA3R5drXimYV3/VLS48jIkUV+v+u1h6LId7nT1RMwaMm3CfBom+:L5i7VvV86+B1h6LIdzTXM76fBoz

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

stanpooker.hopto.org:5050

127.0.0.1:5050

Mutex

ad2f73fd-cc4c-4c14-95a5-6e61a8c57a7d

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2019-12-02T13:42:04.688649336Z

  • 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

    5050

  • default_group

    Qanon

  • 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

    ad2f73fd-cc4c-4c14-95a5-6e61a8c57a7d

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    stanpooker.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.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 20 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4662bc8b2cd5a9b9bfd3ebb0e2d45684.exe
    "C:\Users\Admin\AppData\Local\Temp\4662bc8b2cd5a9b9bfd3ebb0e2d45684.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1752
    • C:\Users\Admin\AppData\Roaming\81252489\bffmore.exe
      "C:\Users\Admin\AppData\Roaming\81252489\bffmore.exe" urlm.avg
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:1964
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:696
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "UDP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4AFE.tmp"
          4⤵
          • Creates scheduled task(s)
          PID:1120

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp4AFE.tmp

          Filesize

          1KB

          MD5

          8cad1b41587ced0f1e74396794f31d58

          SHA1

          11054bf74fcf5e8e412768035e4dae43aa7b710f

          SHA256

          3086d914f6b23268f8a12cb1a05516cd5465c2577e1d1e449f1b45c8e5e8f83c

          SHA512

          99c2ef89029de51a866df932841684b7fc912df21e10e2dd0d09e400203bbdc6cba6319a31780b7bf8b286d2cea8ea3fc7d084348bf2f002ab4f5a34218ccbef

        • C:\Users\Admin\AppData\Roaming\81252489\bffmore.exe

          Filesize

          732KB

          MD5

          71d8f6d5dc35517275bc38ebcc815f9f

          SHA1

          cae4e8c730de5a01d30aabeb3e5cb2136090ed8d

          SHA256

          fb73a819b37523126c7708a1d06f3b8825fa60c926154ab2d511ba668f49dc4b

          SHA512

          4826f45000ea50d9044e3ef11e83426281fbd5f3f5a25f9786c2e487b4cf26b04f6f900ca6e70440644c9d75f700a4c908ab6f398f59c65ee1bff85dfef4ce59

        • C:\Users\Admin\AppData\Roaming\81252489\urlm.avg

          Filesize

          163.6MB

          MD5

          f29fa59fb7608f7d2d89711399e07c5f

          SHA1

          9c2a1ef1b6ed7e77b80489d55bfd66e1f2bdedff

          SHA256

          bf76bcdd34083dcb0daf72ce02d74f088f508810c5d927bbe0b35cb5f6f79aac

          SHA512

          343f9c3e2e989e1d80a4d45d650413b6b8b4f8b6afdac70b973ca3950add56015a76eae4a314c7d28c6e93929fd4e4e3fb1ccbadaafc151ca8d624cb7f693992

        • C:\Users\Admin\AppData\Roaming\81252489\xobkk.log

          Filesize

          461KB

          MD5

          61085555250f8b31da9c9ac34227aba5

          SHA1

          19287b6d6ac2efd33ed5c480c04ce46b9ff27f02

          SHA256

          af708eee368e82354127ff068bfb6b09bd005845fcbe951c4a27cf4a84a45b2d

          SHA512

          30bdc7367d271b330f36b1f8885e27d0ca9d121977a70e70dd23c6c697b2bc495fb538d99a18fb6898087f4a60487df4eb5289469612074f95ca66823347c6a7

        • memory/696-67-0x00000000005A0000-0x00000000005D8000-memory.dmp

          Filesize

          224KB

        • memory/696-74-0x00000000113A0000-0x00000000113AA000-memory.dmp

          Filesize

          40KB

        • memory/696-69-0x00000000116F0000-0x0000000011C94000-memory.dmp

          Filesize

          5.6MB

        • memory/696-70-0x0000000073BE0000-0x0000000074390000-memory.dmp

          Filesize

          7.7MB

        • memory/696-71-0x00000000113E0000-0x0000000011472000-memory.dmp

          Filesize

          584KB

        • memory/696-72-0x0000000011480000-0x000000001151C000-memory.dmp

          Filesize

          624KB

        • memory/696-73-0x0000000011350000-0x0000000011360000-memory.dmp

          Filesize

          64KB

        • memory/696-68-0x0000000073BE0000-0x0000000074390000-memory.dmp

          Filesize

          7.7MB

        • memory/696-66-0x00000000005A0000-0x00000000015A0000-memory.dmp

          Filesize

          16.0MB

        • memory/696-79-0x00000000115E0000-0x00000000115EA000-memory.dmp

          Filesize

          40KB

        • memory/696-80-0x00000000116D0000-0x00000000116EE000-memory.dmp

          Filesize

          120KB

        • memory/696-81-0x0000000012340000-0x000000001234A000-memory.dmp

          Filesize

          40KB

        • memory/696-82-0x0000000011350000-0x0000000011360000-memory.dmp

          Filesize

          64KB

        • memory/696-83-0x0000000011350000-0x0000000011360000-memory.dmp

          Filesize

          64KB

        • memory/696-84-0x0000000011350000-0x0000000011360000-memory.dmp

          Filesize

          64KB