Analysis

  • max time kernel
    94s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-10-2024 08:46

General

  • Target

    RFP1YKrWyM1oDxc.exe

  • Size

    792KB

  • MD5

    f4404d9cd543608dd880c42076521864

  • SHA1

    121f58afd508304776f107f2e6a054cfeed5fd40

  • SHA256

    5fcd1f0174623a340f8c01d1cb4770b2c62b15f0a4036ce84df2120ed0556eb3

  • SHA512

    397b04d2b1b3d5e73634ff9ad4ae843bb160f013975a87b0747125d2905512a52d8f0a22a7d588f1f5776815a3ea86f13364bae1952da695e78eb22e60846b7f

  • SSDEEP

    12288:ETvx16fHYb8RTNSwERVBG5y2hIAx2PKKqeWp5QxzfNGpd0WJMCXoudx:4vx6HkkNQGw2hL2poYxzVGL0WjTv

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

pnauco5.ddns.net:1664

Mutex

cde38e58-d99c-4068-b775-59569bc2e8ce

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    pnauco5.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2024-07-03T06:48:27.569053036Z

  • 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

    1664

  • default_group

    NEW

  • 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

    cde38e58-d99c-4068-b775-59569bc2e8ce

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    pnauco5.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 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 5 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFP1YKrWyM1oDxc.exe
    "C:\Users\Admin\AppData\Local\Temp\RFP1YKrWyM1oDxc.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:212
    • 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\RFP1YKrWyM1oDxc.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2652
    • C:\Users\Admin\AppData\Local\Temp\RFP1YKrWyM1oDxc.exe
      "C:\Users\Admin\AppData\Local\Temp\RFP1YKrWyM1oDxc.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:2420
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DSL Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpC311.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3864
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DSL Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpC554.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3228

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\RFP1YKrWyM1oDxc.exe.log

    Filesize

    1KB

    MD5

    8ec831f3e3a3f77e4a7b9cd32b48384c

    SHA1

    d83f09fd87c5bd86e045873c231c14836e76a05c

    SHA256

    7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

    SHA512

    26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ry3z2uar.gz5.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmpC311.tmp

    Filesize

    1KB

    MD5

    f35a0f72b5bf54651333b75ec1ade516

    SHA1

    53d528119c24229ff5fd6b843c7e930c18c08314

    SHA256

    a19a434e1c84ee33578c3248560d2cc3659f7c5ed2845d66aeab7bee49f1d89f

    SHA512

    4b815247d41cca1c885e9cdd33c742d4cc2aa279e52195d38175c65082246603e368d0843073423b7b5ec8521288c5f66dc1b4bd045e9b040d4c09e82ab6e30a

  • C:\Users\Admin\AppData\Local\Temp\tmpC554.tmp

    Filesize

    1KB

    MD5

    afb71a33ece3758f782f052bbe5da94f

    SHA1

    e69b9070ff52f81fdf01a40f775d021e4b4e71e4

    SHA256

    abd73bfca8458750ee751d4c6c106d54dcf0969592f476acc64ab0d7f2bb1978

    SHA512

    22c45992ca358ca9d4605ac426b65903b11b27db1b9c608739245dc412aa256d0908566626b3cfdafb32fca0809bf46c8824ab98cea7b7662216c915e6ef013f

  • memory/212-4-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/212-5-0x0000000005810000-0x000000000581A000-memory.dmp

    Filesize

    40KB

  • memory/212-6-0x0000000005AF0000-0x0000000005B0E000-memory.dmp

    Filesize

    120KB

  • memory/212-7-0x00000000744FE000-0x00000000744FF000-memory.dmp

    Filesize

    4KB

  • memory/212-8-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/212-9-0x0000000002ED0000-0x0000000002F4A000-memory.dmp

    Filesize

    488KB

  • memory/212-10-0x000000000B670000-0x000000000B70C000-memory.dmp

    Filesize

    624KB

  • memory/212-3-0x0000000005660000-0x00000000056F2000-memory.dmp

    Filesize

    584KB

  • memory/212-2-0x0000000005B20000-0x00000000060C4000-memory.dmp

    Filesize

    5.6MB

  • memory/212-15-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/212-1-0x0000000000BC0000-0x0000000000C8C000-memory.dmp

    Filesize

    816KB

  • memory/212-0-0x00000000744FE000-0x00000000744FF000-memory.dmp

    Filesize

    4KB

  • memory/2420-87-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2420-79-0x00000000070C0000-0x00000000070D4000-memory.dmp

    Filesize

    80KB

  • memory/2420-84-0x0000000007160000-0x0000000007174000-memory.dmp

    Filesize

    80KB

  • memory/2420-83-0x0000000007120000-0x000000000714E000-memory.dmp

    Filesize

    184KB

  • memory/2420-24-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2420-74-0x0000000007050000-0x0000000007062000-memory.dmp

    Filesize

    72KB

  • memory/2420-82-0x0000000007110000-0x000000000711E000-memory.dmp

    Filesize

    56KB

  • memory/2420-81-0x00000000070F0000-0x0000000007104000-memory.dmp

    Filesize

    80KB

  • memory/2420-80-0x00000000070D0000-0x00000000070E0000-memory.dmp

    Filesize

    64KB

  • memory/2420-85-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2420-78-0x00000000070B0000-0x00000000070BE000-memory.dmp

    Filesize

    56KB

  • memory/2420-77-0x00000000070A0000-0x00000000070B2000-memory.dmp

    Filesize

    72KB

  • memory/2420-14-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2420-11-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2420-45-0x0000000005880000-0x000000000589E000-memory.dmp

    Filesize

    120KB

  • memory/2420-46-0x00000000067F0000-0x00000000067FA000-memory.dmp

    Filesize

    40KB

  • memory/2420-44-0x0000000005870000-0x000000000587A000-memory.dmp

    Filesize

    40KB

  • memory/2420-76-0x0000000007090000-0x000000000709E000-memory.dmp

    Filesize

    56KB

  • memory/2420-75-0x0000000007060000-0x000000000707A000-memory.dmp

    Filesize

    104KB

  • memory/2652-16-0x0000000004560000-0x0000000004596000-memory.dmp

    Filesize

    216KB

  • memory/2652-59-0x0000000006AC0000-0x0000000006B63000-memory.dmp

    Filesize

    652KB

  • memory/2652-60-0x0000000007430000-0x0000000007AAA000-memory.dmp

    Filesize

    6.5MB

  • memory/2652-61-0x0000000006DF0000-0x0000000006E0A000-memory.dmp

    Filesize

    104KB

  • memory/2652-63-0x0000000006E60000-0x0000000006E6A000-memory.dmp

    Filesize

    40KB

  • memory/2652-64-0x0000000007070000-0x0000000007106000-memory.dmp

    Filesize

    600KB

  • memory/2652-65-0x0000000006FF0000-0x0000000007001000-memory.dmp

    Filesize

    68KB

  • memory/2652-66-0x0000000007020000-0x000000000702E000-memory.dmp

    Filesize

    56KB

  • memory/2652-67-0x0000000007030000-0x0000000007044000-memory.dmp

    Filesize

    80KB

  • memory/2652-68-0x0000000007130000-0x000000000714A000-memory.dmp

    Filesize

    104KB

  • memory/2652-69-0x0000000007110000-0x0000000007118000-memory.dmp

    Filesize

    32KB

  • memory/2652-72-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2652-48-0x0000000070140000-0x000000007018C000-memory.dmp

    Filesize

    304KB

  • memory/2652-58-0x00000000060A0000-0x00000000060BE000-memory.dmp

    Filesize

    120KB

  • memory/2652-47-0x0000000006A80000-0x0000000006AB2000-memory.dmp

    Filesize

    200KB

  • memory/2652-39-0x0000000005DB0000-0x0000000005DFC000-memory.dmp

    Filesize

    304KB

  • memory/2652-38-0x0000000005AD0000-0x0000000005AEE000-memory.dmp

    Filesize

    120KB

  • memory/2652-37-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2652-36-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2652-35-0x00000000054B0000-0x0000000005804000-memory.dmp

    Filesize

    3.3MB

  • memory/2652-21-0x0000000005440000-0x00000000054A6000-memory.dmp

    Filesize

    408KB

  • memory/2652-19-0x0000000005230000-0x0000000005252000-memory.dmp

    Filesize

    136KB

  • memory/2652-20-0x00000000053D0000-0x0000000005436000-memory.dmp

    Filesize

    408KB

  • memory/2652-17-0x00000000744F0000-0x0000000074CA0000-memory.dmp

    Filesize

    7.7MB

  • memory/2652-18-0x0000000004BD0000-0x00000000051F8000-memory.dmp

    Filesize

    6.2MB