Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    25-05-2024 01:54

General

  • Target

    9c91a1b8c4da2d7588f3aecd76cdee7dba24d95f0874f79fa711c0b0a490e273.exe

  • Size

    703KB

  • MD5

    ced4bd90abb0a4964629c7531c5a805c

  • SHA1

    a3d338f4ca5fb9dac24c09a7f58da074c54cf27d

  • SHA256

    9c91a1b8c4da2d7588f3aecd76cdee7dba24d95f0874f79fa711c0b0a490e273

  • SHA512

    fcae809d93d5ecb6e9b9a61c857cb27dd5dee68dff6df4839f2f3c8849cba47f0d64810a9e987457382eb2ce9d656e01644f2b9da06bb01b9535d3f6fde7005c

  • SSDEEP

    12288:wGv/SZlz9u11tzfIazSYflF3KFCzlWoaoPyomtK08MQyYJ6AsZDdwUV0czdxbIGM:JSZyftzgazzDKCFaoPAtK0LQcUUqct1e

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

psolver827.ddns.net:1974

127.0.0.1:1974

Mutex

9bd2ed5f-213a-4882-91bf-95b6e3347c3e

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2024-02-26T07:38:31.398347236Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTE2Ij8+DQo8VGFzayB2ZXJzaW9uPSIxLjIiIHhtbG5zPSJodHRwOi8vc2NoZW1hcy5taWNyb3NvZnQuY29tL3dpbmRvd3MvMjAwNC8wMi9taXQvdGFzayI+DQogIDxSZWdpc3RyYXRpb25JbmZvIC8+DQogIDxUcmlnZ2VycyAvPg0KICA8UHJpbmNpcGFscz4NCiAgICA8UHJpbmNpcGFsIGlkPSJBdXRob3IiPg0KICAgICAgPExvZ29uVHlwZT5JbnRlcmFjdGl2ZVRva2VuPC9Mb2dvblR5cGU+DQogICAgICA8UnVuTGV2ZWw+SGlnaGVzdEF2YWlsYWJsZTwvUnVuTGV2ZWw+DQogICAgPC9QcmluY2lwYWw+DQogIDwvUHJpbmNpcGFscz4NCiAgPFNldHRpbmdzPg0KICAgIDxNdWx0aXBsZUluc3RhbmNlc1BvbGljeT5QYXJhbGxlbDwvTXVsdGlwbGVJbnN0YW5jZXNQb2xpY3k+DQogICAgPERpc2FsbG93U3RhcnRJZk9uQmF0dGVyaWVzPmZhbHNlPC9EaXNhbGxvd1N0YXJ0SWZPbkJhdHRlcmllcz4NCiAgICA8U3RvcElmR29pbmdPbkJhdHRlcmllcz5mYWxzZTwvU3RvcElmR29pbmdPbkJhdHRlcmllcz4NCiAgICA8QWxsb3dIYXJkVGVybWluYXRlPnRydWU8L0FsbG93SGFyZFRlcm1pbmF0ZT4NCiAgICA8U3RhcnRXaGVuQXZhaWxhYmxlPmZhbHNlPC9TdGFydFdoZW5BdmFpbGFibGU+DQogICAgPFJ1bk9ubHlJZk5ldHdvcmtBdmFpbGFibGU+ZmFsc2U8L1J1bk9ubHlJZk5ldHdvcmtBdmFpbGFibGU+DQogICAgPElkbGVTZXR0aW5ncz4NCiAgICAgIDxTdG9wT25JZGxlRW5kPmZhbHNlPC9TdG9wT25JZGxlRW5kPg0KICAgICAgPFJlc3RhcnRPbklkbGU+ZmFsc2U8L1Jlc3RhcnRPbklkbGU+DQogICAgPC9JZGxlU2V0dGluZ3M+DQogICAgPEFsbG93U3RhcnRPbkRlbWFuZD50cnVlPC9BbGxvd1N0YXJ0T25EZW1hbmQ+DQogICAgPEVuYWJsZWQ+dHJ1ZTwvRW5hYmxlZD4NCiAgICA8SGlkZGVuPmZhbHNlPC9IaWRkZW4+DQogICAgPFJ1bk9ubHlJZklkbGU+ZmFsc2U8L1J1bk9ubHlJZklkbGU+DQogICAgPFdha2VUb1J1bj5mYWxzZTwvV2FrZVRvUnVuPg0KICAgIDxFeGVjdXRpb25UaW1lTGltaXQ+UFQwUzwvRXhlY3V0aW9uVGltZUxpbWl0Pg0KICAgIDxQcmlvcml0eT40PC9Qcmlvcml0eT4NCiAgPC9TZXR0aW5ncz4NCiAgPEFjdGlvbnMgQ29udGV4dD0iQXV0aG9yIj4NCiAgICA8RXhlYz4NCiAgICAgIDxDb21tYW5kPiIjRVhFQ1VUQUJMRVBBVEgiPC9Db21tYW5kPg0KICAgICAgPEFyZ3VtZW50cz4kKEFyZzApPC9Bcmd1bWVudHM+DQogICAgPC9FeGVjPg0KICA8L0FjdGlvbnM+DQo8L1Rhc2s+

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1974

  • default_group

    dcGEN

  • 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

    9bd2ed5f-213a-4882-91bf-95b6e3347c3e

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    psolver827.ddns.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.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9c91a1b8c4da2d7588f3aecd76cdee7dba24d95f0874f79fa711c0b0a490e273.exe
    "C:\Users\Admin\AppData\Local\Temp\9c91a1b8c4da2d7588f3aecd76cdee7dba24d95f0874f79fa711c0b0a490e273.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1836
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\9c91a1b8c4da2d7588f3aecd76cdee7dba24d95f0874f79fa711c0b0a490e273.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2596
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\tpwLHsKzvxy.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2512
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\tpwLHsKzvxy" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4672.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2360
    • C:\Users\Admin\AppData\Local\Temp\9c91a1b8c4da2d7588f3aecd76cdee7dba24d95f0874f79fa711c0b0a490e273.exe
      "C:\Users\Admin\AppData\Local\Temp\9c91a1b8c4da2d7588f3aecd76cdee7dba24d95f0874f79fa711c0b0a490e273.exe"
      2⤵
        PID:2352
      • C:\Users\Admin\AppData\Local\Temp\9c91a1b8c4da2d7588f3aecd76cdee7dba24d95f0874f79fa711c0b0a490e273.exe
        "C:\Users\Admin\AppData\Local\Temp\9c91a1b8c4da2d7588f3aecd76cdee7dba24d95f0874f79fa711c0b0a490e273.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:2368
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "DHCP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4827.tmp"
          3⤵
          • Creates scheduled task(s)
          PID:1188
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks.exe" /create /f /tn "DHCP Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4876.tmp"
          3⤵
          • Creates scheduled task(s)
          PID:1436

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp4672.tmp

      Filesize

      1KB

      MD5

      48bf9e500fd90de2b5f81a2a17623ad8

      SHA1

      5aeceb76562dd9403e292faa148c3e4af039bea7

      SHA256

      05f364afd552c2f7c7cfea7a070e0e65c8aa80752ea3c63a721bdb1a0a18656e

      SHA512

      7813ea541b1dacb739bd2e9407a8d7a0f6866317c1cf41f9cda31a8513a555d54570268639e7ac8f3b9c5f7f4e99efe664c0c4319ef89873cf02a7410ae51bd3

    • C:\Users\Admin\AppData\Local\Temp\tmp4827.tmp

      Filesize

      1KB

      MD5

      7d221cd77ac1b3763a32a12e958245e0

      SHA1

      e741c823ced2aadeb26615e91fd4773b61a36790

      SHA256

      0f4d86ef42bed7810d6070cc9f11a9086f4dc70f33d43c641fce1a394b0ceae4

      SHA512

      d45646b49c730675c698cad55ba7572ad929013dfaa33ca140c6989d7ffbbf25d3605521e4952c70bfe888a01564f71b467ed054b92776783ae888ad4698481f

    • C:\Users\Admin\AppData\Local\Temp\tmp4876.tmp

      Filesize

      1KB

      MD5

      0479d5f304ef2d7e3c15fb24a99f88c1

      SHA1

      8edbb1450a656fac5f5e96779ffe440ee8c1aec9

      SHA256

      112557c2b2d0c669a3b115129dc32f005341e965330fa8f2ad3e5de1926594bc

      SHA512

      537e8d87e5cd975f0e69bb145f81d6e9d7b0d82eed143ac351304ea38577137386a51fdb7357ec6d641eb04ff5f51e249bba2db8a4b5bf2934d561394a4a3f15

    • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

      Filesize

      7KB

      MD5

      b6aa9f1cde6d711d8e7f58770e0685ee

      SHA1

      8543973a2424ee65e870f1edb741a88472689e7c

      SHA256

      58f64f0c367404630dc247390913f25939c3c535c5e99d2273a3cd0169d8d48e

      SHA512

      eb08b296aea8727a13960b872b4aa7fba45cf29723de8b37007830e9cf9da97e689b31beb67c3cc42c722c0862b2029a6ec580cf3324888486177a033d9d640b

    • memory/1836-30-0x00000000744D0000-0x0000000074BBE000-memory.dmp

      Filesize

      6.9MB

    • memory/1836-1-0x00000000002E0000-0x0000000000392000-memory.dmp

      Filesize

      712KB

    • memory/1836-2-0x00000000744D0000-0x0000000074BBE000-memory.dmp

      Filesize

      6.9MB

    • memory/1836-3-0x0000000000280000-0x000000000029A000-memory.dmp

      Filesize

      104KB

    • memory/1836-4-0x0000000000230000-0x0000000000240000-memory.dmp

      Filesize

      64KB

    • memory/1836-5-0x0000000007260000-0x00000000072DA000-memory.dmp

      Filesize

      488KB

    • memory/1836-0-0x00000000744DE000-0x00000000744DF000-memory.dmp

      Filesize

      4KB

    • memory/2368-22-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2368-28-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2368-27-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2368-26-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2368-24-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2368-29-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2368-20-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2368-18-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/2368-38-0x0000000000520000-0x000000000052A000-memory.dmp

      Filesize

      40KB

    • memory/2368-39-0x0000000000530000-0x000000000054E000-memory.dmp

      Filesize

      120KB

    • memory/2368-40-0x0000000000550000-0x000000000055A000-memory.dmp

      Filesize

      40KB