Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-11-2024 10:14

General

  • Target

    04a1c3845c480911e02cb87706b64ec7c433234e4f9f5d42cde4a737213c916f.exe

  • Size

    810KB

  • MD5

    43052439d057549a3dbc5307424927d5

  • SHA1

    69bcbb9df5b4dbc50839a96ba64a03b534919f06

  • SHA256

    04a1c3845c480911e02cb87706b64ec7c433234e4f9f5d42cde4a737213c916f

  • SHA512

    b3592d217d5e413a08c62e2aaac621e056497af8cedf3d6a736f31343abe80637ce9eb11a29cd0f81ae86e6ffdea7e0d50b34129b22855dfde5f6fd5a1415f54

  • SSDEEP

    24576:A85rNl0k15HDxrUH3sY20fNjaj5sO9VaQSs:A8nl0A5HDx90fNk5sO9nl

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

brewsterchristophe.ddns.net:5899

194,147,5,75:5899

Mutex

b8aebc29-8c64-444f-99e6-dc4122e9bbfc

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    194,147,5,75

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-04-29T03:26:40.572298236Z

  • 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

    5899

  • default_group

    Default

  • 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

    b8aebc29-8c64-444f-99e6-dc4122e9bbfc

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    brewsterchristophe.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.

  • Nanocore family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\04a1c3845c480911e02cb87706b64ec7c433234e4f9f5d42cde4a737213c916f.exe
    "C:\Users\Admin\AppData\Local\Temp\04a1c3845c480911e02cb87706b64ec7c433234e4f9f5d42cde4a737213c916f.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1224
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\TYWfRu.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3776
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TYWfRu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp681B.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3380
    • C:\Users\Admin\AppData\Local\Temp\04a1c3845c480911e02cb87706b64ec7c433234e4f9f5d42cde4a737213c916f.exe
      "C:\Users\Admin\AppData\Local\Temp\04a1c3845c480911e02cb87706b64ec7c433234e4f9f5d42cde4a737213c916f.exe"
      2⤵
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1116
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DHCP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6B57.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:5108
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DHCP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6B97.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2572

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3epmko4k.ewp.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp681B.tmp

    Filesize

    1KB

    MD5

    5c3ddb2a3bf2be0a8d84a7801e9a52d8

    SHA1

    72d40d3ee82201b50bc1d1ad5bb764d863806865

    SHA256

    7d523c2b850964e373fe4071b269ef7bb64b598f06dfc6a9a877f4b4884c4c94

    SHA512

    e1b96dfcba8bc5002ff477cf03d5570068c1c4dae27b141d21d6f5b93f8141432ea9491cef03896b8a0afb4f805dbf6071a9b5ee70c7ca4c2f69de7db2ca96ea

  • C:\Users\Admin\AppData\Local\Temp\tmp6B57.tmp

    Filesize

    1KB

    MD5

    a591a76fa75368c8204f7b06eb32b266

    SHA1

    eeb86563fae956e79a000f489962101a332b6a09

    SHA256

    a2ce4b2c85707d41c214e7f2631e45d9c05e2e8980761a4f402849ae76ef7ff2

    SHA512

    fef6b7d5fcacf0e769703cee1a53aa62274ccce2534c9a340888c1c442adad6d9de572b9a66a726bf90c6deb3e5a2ce4cd9caf11ad330fe879f403de51741673

  • C:\Users\Admin\AppData\Local\Temp\tmp6B97.tmp

    Filesize

    1KB

    MD5

    7f4b37265a0a4b0fea67999d11d911e8

    SHA1

    1b8e13e6a27c3768c30cf713b79eaa8a757e1349

    SHA256

    39b16b3a00b6b43c6820357127228c0768a577153014ce7b0ea3c585244dc08b

    SHA512

    ef97ccfb663555aedc7fdc4b3ac4cd6536c80a778b4ec3bc6124a09544733988de1dac1e6a3714b0d6e8713e3523e0732d5dfcf674f2c5e1f3eadacb0c8e5e03

  • memory/1116-76-0x00000000744D0000-0x0000000074C80000-memory.dmp

    Filesize

    7.7MB

  • memory/1116-48-0x00000000053B0000-0x00000000053BA000-memory.dmp

    Filesize

    40KB

  • memory/1116-24-0x00000000744D0000-0x0000000074C80000-memory.dmp

    Filesize

    7.7MB

  • memory/1116-21-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1116-49-0x0000000005790000-0x00000000057AE000-memory.dmp

    Filesize

    120KB

  • memory/1116-50-0x0000000006520000-0x000000000652A000-memory.dmp

    Filesize

    40KB

  • memory/1224-6-0x00000000050B0000-0x00000000050C6000-memory.dmp

    Filesize

    88KB

  • memory/1224-7-0x00000000744DE000-0x00000000744DF000-memory.dmp

    Filesize

    4KB

  • memory/1224-0-0x00000000744DE000-0x00000000744DF000-memory.dmp

    Filesize

    4KB

  • memory/1224-10-0x0000000006510000-0x0000000006582000-memory.dmp

    Filesize

    456KB

  • memory/1224-9-0x00000000052F0000-0x00000000052FA000-memory.dmp

    Filesize

    40KB

  • memory/1224-20-0x00000000061C0000-0x00000000061FA000-memory.dmp

    Filesize

    232KB

  • memory/1224-8-0x00000000744D0000-0x0000000074C80000-memory.dmp

    Filesize

    7.7MB

  • memory/1224-11-0x0000000006630000-0x00000000066CC000-memory.dmp

    Filesize

    624KB

  • memory/1224-5-0x00000000744D0000-0x0000000074C80000-memory.dmp

    Filesize

    7.7MB

  • memory/1224-4-0x0000000004D00000-0x0000000004D0A000-memory.dmp

    Filesize

    40KB

  • memory/1224-25-0x00000000744D0000-0x0000000074C80000-memory.dmp

    Filesize

    7.7MB

  • memory/1224-3-0x0000000004D70000-0x0000000004E02000-memory.dmp

    Filesize

    584KB

  • memory/1224-2-0x0000000005320000-0x00000000058C4000-memory.dmp

    Filesize

    5.6MB

  • memory/1224-1-0x0000000000380000-0x0000000000450000-memory.dmp

    Filesize

    832KB

  • memory/3776-17-0x00000000744D0000-0x0000000074C80000-memory.dmp

    Filesize

    7.7MB

  • memory/3776-38-0x0000000006210000-0x0000000006564000-memory.dmp

    Filesize

    3.3MB

  • memory/3776-27-0x00000000058D0000-0x0000000005936000-memory.dmp

    Filesize

    408KB

  • memory/3776-28-0x00000000061A0000-0x0000000006206000-memory.dmp

    Filesize

    408KB

  • memory/3776-46-0x0000000006800000-0x000000000681E000-memory.dmp

    Filesize

    120KB

  • memory/3776-47-0x0000000006D90000-0x0000000006DDC000-memory.dmp

    Filesize

    304KB

  • memory/3776-26-0x0000000005730000-0x0000000005752000-memory.dmp

    Filesize

    136KB

  • memory/3776-22-0x0000000005980000-0x0000000005FA8000-memory.dmp

    Filesize

    6.2MB

  • memory/3776-19-0x00000000744D0000-0x0000000074C80000-memory.dmp

    Filesize

    7.7MB

  • memory/3776-51-0x0000000007A00000-0x0000000007A32000-memory.dmp

    Filesize

    200KB

  • memory/3776-52-0x0000000070090000-0x00000000700DC000-memory.dmp

    Filesize

    304KB

  • memory/3776-62-0x0000000006DE0000-0x0000000006DFE000-memory.dmp

    Filesize

    120KB

  • memory/3776-63-0x0000000007A40000-0x0000000007AE3000-memory.dmp

    Filesize

    652KB

  • memory/3776-64-0x0000000008180000-0x00000000087FA000-memory.dmp

    Filesize

    6.5MB

  • memory/3776-65-0x0000000007B30000-0x0000000007B4A000-memory.dmp

    Filesize

    104KB

  • memory/3776-66-0x0000000007BA0000-0x0000000007BAA000-memory.dmp

    Filesize

    40KB

  • memory/3776-67-0x0000000007DB0000-0x0000000007E46000-memory.dmp

    Filesize

    600KB

  • memory/3776-68-0x0000000007D30000-0x0000000007D41000-memory.dmp

    Filesize

    68KB

  • memory/3776-69-0x0000000007D60000-0x0000000007D6E000-memory.dmp

    Filesize

    56KB

  • memory/3776-70-0x0000000007D70000-0x0000000007D84000-memory.dmp

    Filesize

    80KB

  • memory/3776-71-0x0000000007E70000-0x0000000007E8A000-memory.dmp

    Filesize

    104KB

  • memory/3776-72-0x0000000007E50000-0x0000000007E58000-memory.dmp

    Filesize

    32KB

  • memory/3776-75-0x00000000744D0000-0x0000000074C80000-memory.dmp

    Filesize

    7.7MB

  • memory/3776-16-0x0000000002EE0000-0x0000000002F16000-memory.dmp

    Filesize

    216KB