Analysis

  • max time kernel
    118s
  • max time network
    107s
  • 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, 10:11

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

    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

  • 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:4260
    • 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:1272
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TYWfRu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp895F.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:1012
    • 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:1572
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DHCP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8D28.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2304
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DHCP Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8D58.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4740

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\04a1c3845c480911e02cb87706b64ec7c433234e4f9f5d42cde4a737213c916f.exe.log

          Filesize

          1KB

          MD5

          223f4a739ad59f1e1316c3deb7669f1b

          SHA1

          9ded1101965e95e57653925ad947cfb91d3930df

          SHA256

          d00f92bea84f7d78f23ff963bf334e8c77a7fad01a0d4cd89ac849981dfbffd7

          SHA512

          8c1cf2c6bda136ae23faea87cba8114ad65ea71320a929604a022eaf3a7dfe9958480088843903946474e2c0f47569b5270b74951a78450e5a46b8d547cb6e3f

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lo1xog2q.hjj.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\tmp895F.tmp

          Filesize

          1KB

          MD5

          22e6d4e3485bc2cd730a1354a1ebbd16

          SHA1

          da037e9c0b834304bb71e773cc1e94f50f7b305c

          SHA256

          c3643e5b4fb423da6b54b0c925e1806f9f883e2ebe79061782ba4ff421999a9c

          SHA512

          308557f981c99a26dc3cefb69f3b89cb35ddc6085b30945fa051ad296cb5369fd81d89bdb6bbf99ea459f6fe099aed81505b836c54d3d9baaf44e5b8c93c336f

        • C:\Users\Admin\AppData\Local\Temp\tmp8D28.tmp

          Filesize

          1KB

          MD5

          a591a76fa75368c8204f7b06eb32b266

          SHA1

          eeb86563fae956e79a000f489962101a332b6a09

          SHA256

          a2ce4b2c85707d41c214e7f2631e45d9c05e2e8980761a4f402849ae76ef7ff2

          SHA512

          fef6b7d5fcacf0e769703cee1a53aa62274ccce2534c9a340888c1c442adad6d9de572b9a66a726bf90c6deb3e5a2ce4cd9caf11ad330fe879f403de51741673

        • C:\Users\Admin\AppData\Local\Temp\tmp8D58.tmp

          Filesize

          1KB

          MD5

          0479d5f304ef2d7e3c15fb24a99f88c1

          SHA1

          8edbb1450a656fac5f5e96779ffe440ee8c1aec9

          SHA256

          112557c2b2d0c669a3b115129dc32f005341e965330fa8f2ad3e5de1926594bc

          SHA512

          537e8d87e5cd975f0e69bb145f81d6e9d7b0d82eed143ac351304ea38577137386a51fdb7357ec6d641eb04ff5f51e249bba2db8a4b5bf2934d561394a4a3f15

        • memory/1272-16-0x0000000002400000-0x0000000002436000-memory.dmp

          Filesize

          216KB

        • memory/1272-69-0x0000000007220000-0x0000000007231000-memory.dmp

          Filesize

          68KB

        • memory/1272-52-0x00000000062A0000-0x00000000062D2000-memory.dmp

          Filesize

          200KB

        • memory/1272-76-0x0000000074830000-0x0000000074FE0000-memory.dmp

          Filesize

          7.7MB

        • memory/1272-73-0x00000000072A0000-0x00000000072A8000-memory.dmp

          Filesize

          32KB

        • memory/1272-72-0x0000000007360000-0x000000000737A000-memory.dmp

          Filesize

          104KB

        • memory/1272-71-0x0000000007260000-0x0000000007274000-memory.dmp

          Filesize

          80KB

        • memory/1272-70-0x0000000007250000-0x000000000725E000-memory.dmp

          Filesize

          56KB

        • memory/1272-17-0x0000000074830000-0x0000000074FE0000-memory.dmp

          Filesize

          7.7MB

        • memory/1272-18-0x0000000004FC0000-0x00000000055E8000-memory.dmp

          Filesize

          6.2MB

        • memory/1272-19-0x0000000074830000-0x0000000074FE0000-memory.dmp

          Filesize

          7.7MB

        • memory/1272-63-0x0000000006300000-0x000000000631E000-memory.dmp

          Filesize

          120KB

        • memory/1272-23-0x0000000004E50000-0x0000000004EB6000-memory.dmp

          Filesize

          408KB

        • memory/1272-22-0x0000000004DE0000-0x0000000004E46000-memory.dmp

          Filesize

          408KB

        • memory/1272-20-0x0000000004C40000-0x0000000004C62000-memory.dmp

          Filesize

          136KB

        • memory/1272-53-0x000000006D2F0000-0x000000006D33C000-memory.dmp

          Filesize

          304KB

        • memory/1272-30-0x00000000056F0000-0x0000000005A44000-memory.dmp

          Filesize

          3.3MB

        • memory/1272-68-0x00000000072C0000-0x0000000007356000-memory.dmp

          Filesize

          600KB

        • memory/1272-64-0x0000000006CE0000-0x0000000006D83000-memory.dmp

          Filesize

          652KB

        • memory/1272-67-0x0000000006E80000-0x0000000006E8A000-memory.dmp

          Filesize

          40KB

        • memory/1272-66-0x0000000006E10000-0x0000000006E2A000-memory.dmp

          Filesize

          104KB

        • memory/1272-65-0x0000000007760000-0x0000000007DDA000-memory.dmp

          Filesize

          6.5MB

        • memory/1272-39-0x0000000005CE0000-0x0000000005CFE000-memory.dmp

          Filesize

          120KB

        • memory/1272-41-0x00000000060F0000-0x000000000613C000-memory.dmp

          Filesize

          304KB

        • memory/1572-31-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1572-38-0x0000000074830000-0x0000000074FE0000-memory.dmp

          Filesize

          7.7MB

        • memory/1572-50-0x0000000005630000-0x000000000564E000-memory.dmp

          Filesize

          120KB

        • memory/1572-51-0x0000000006280000-0x000000000628A000-memory.dmp

          Filesize

          40KB

        • memory/1572-49-0x0000000005140000-0x000000000514A000-memory.dmp

          Filesize

          40KB

        • memory/1572-77-0x0000000074830000-0x0000000074FE0000-memory.dmp

          Filesize

          7.7MB

        • memory/4260-5-0x00000000050B0000-0x00000000050BA000-memory.dmp

          Filesize

          40KB

        • memory/4260-1-0x00000000005F0000-0x00000000006C0000-memory.dmp

          Filesize

          832KB

        • memory/4260-2-0x00000000055B0000-0x0000000005B54000-memory.dmp

          Filesize

          5.6MB

        • memory/4260-6-0x0000000005240000-0x0000000005256000-memory.dmp

          Filesize

          88KB

        • memory/4260-40-0x0000000074830000-0x0000000074FE0000-memory.dmp

          Filesize

          7.7MB

        • memory/4260-3-0x00000000050E0000-0x0000000005172000-memory.dmp

          Filesize

          584KB

        • memory/4260-29-0x0000000005CA0000-0x0000000005CDA000-memory.dmp

          Filesize

          232KB

        • memory/4260-4-0x0000000074830000-0x0000000074FE0000-memory.dmp

          Filesize

          7.7MB

        • memory/4260-0-0x000000007483E000-0x000000007483F000-memory.dmp

          Filesize

          4KB

        • memory/4260-11-0x00000000069E0000-0x0000000006A7C000-memory.dmp

          Filesize

          624KB

        • memory/4260-10-0x00000000068D0000-0x0000000006942000-memory.dmp

          Filesize

          456KB

        • memory/4260-9-0x00000000052F0000-0x00000000052FA000-memory.dmp

          Filesize

          40KB

        • memory/4260-8-0x0000000074830000-0x0000000074FE0000-memory.dmp

          Filesize

          7.7MB

        • memory/4260-7-0x000000007483E000-0x000000007483F000-memory.dmp

          Filesize

          4KB