Analysis

  • max time kernel
    150s
  • max time network
    158s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-05-2024 07:01

General

  • Target

    NaxorCrypter.exe

  • Size

    2.2MB

  • MD5

    b29c154b97950a07caf5aa3e3795a4a1

  • SHA1

    8940008c6630ad14a42f76c72b63341adb406736

  • SHA256

    51a39194cd5c21c1de6e9724f9b5890a2b50f9d7e3b7fa003a5e50beb9559fb4

  • SHA512

    c21b40a6e412f0022da398212ddcf6cfdf51522715297d0275fb2983d936a1ace29f4f8a54f751617fc92121b825424389bdd096b9c59c4cff6a58a57bde7bc3

  • SSDEEP

    24576:NkGGdafLtcWAjB9XvdBqLP2XDBxkdgGAQjdhnF61A5w/8yYBBifgqH3P64F7:G4ovIbqxCTx5w/Xf5f

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

1337day.ddns.net:1900

Mutex

93979016-0516-4417-b883-a0edc923fe85

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    1337day.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2018-07-29T17:12:59.761069736Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1900

  • 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

    93979016-0516-4417-b883-a0edc923fe85

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

  • 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

Extracted

Family

njrat

Version

0.6.4

Botnet

HacKed

C2

fal92.duckdns.org:10142

Mutex

3d25feee885880d8ab876c66d8b91d84

Attributes
  • reg_key

    3d25feee885880d8ab876c66d8b91d84

  • splitter

    |'|'|

Signatures

  • NanoCore

    NanoCore is a remote access tool (RAT) with a variety of capabilities.

  • njRAT/Bladabindi

    Widely used RAT written in .NET.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Drops startup file 2 IoCs
  • Executes dropped EXE 6 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops desktop.ini file(s) 2 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • Drops file in Windows directory 3 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 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 42 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NaxorCrypter.exe
    "C:\Users\Admin\AppData\Local\Temp\NaxorCrypter.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4480
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Crypter\Crypter" /XML "C:\Users\Admin\AppData\Roaming\Crypter\aKKKKK.xml"
      2⤵
      • Creates scheduled task(s)
      PID:2296
    • C:\Users\Admin\AppData\Local\Temp\NaxorCrypter.exe
      "C:\Users\Admin\AppData\Local\Temp\NaxorCrypter.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:4476
    • C:\Users\Admin\AppData\Local\Temp\Naxor.exe
      "C:\Users\Admin\AppData\Local\Temp\Naxor.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1236
      • C:\Users\Admin\AppData\Local\Temp\Cooporation Nvidia.exe
        "C:\Users\Admin\AppData\Local\Temp\Cooporation Nvidia.exe"
        3⤵
        • Executes dropped EXE
        • Drops desktop.ini file(s)
        • Suspicious use of SetThreadContext
        • Drops file in Windows directory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2320
        • C:\Users\Admin\AppData\Local\Temp\Cooporation Nvidia.exe
          "C:\Users\Admin\AppData\Local\Temp\Cooporation Nvidia.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:4996
          • C:\Users\Admin\AppData\Roaming\Cooporation Nvidia.exe
            "C:\Users\Admin\AppData\Roaming\Cooporation Nvidia.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4780
            • C:\Users\Admin\AppData\Roaming\Cooporation Nvidia.exe
              "C:\Users\Admin\AppData\Roaming\Cooporation Nvidia.exe"
              6⤵
              • Drops startup file
              • Executes dropped EXE
              • Adds Run key to start application
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of WriteProcessMemory
              PID:3600
              • C:\Windows\SysWOW64\netsh.exe
                netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\Cooporation Nvidia.exe" "Cooporation Nvidia.exe" ENABLE
                7⤵
                • Modifies Windows Firewall
                PID:3268
      • C:\Users\Admin\AppData\Local\Temp\Naxor Crypter.exe
        "C:\Users\Admin\AppData\Local\Temp\Naxor Crypter.exe"
        3⤵
        • Executes dropped EXE
        PID:1196

Network

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Impair Defenses

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

3
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\Cooporation Nvidia.exe.log
    Filesize

    499B

    MD5

    13840f563b7e837c7db570b3332833a5

    SHA1

    dee01a177a63a813d58653908ccccd693f091676

    SHA256

    333bbd84120abbd26f38f867b6f96265e55bb01dfd111eb0271d88bde3258a60

    SHA512

    2f53086d5af59806f29902f693614e344fd0f75dc0deed4f8d18c95bfd2542ed7abd17aa60eeb8cde9d5c9f04ad42c4f87e3438eedf70cd8f5449f806e083ec5

  • C:\Users\Admin\AppData\Local\Temp\Cooporation Nvidia.exe
    Filesize

    286KB

    MD5

    2bb4aaf47de772b665bdab87fa48ee60

    SHA1

    ccddbd80107f4b854826c92d7e8088d6c3736684

    SHA256

    a939480354a35391d3b4c970ef4cfa48acbdcabb3c7992b21f947ac9029b9500

    SHA512

    4e75c2d36e753dd7bc192b2d4575a45a336179659573733dea6c484051c6efda25f4bb7412190c201e3f0f06a785409d130932df588dd69f199da8e9ae81daf2

  • C:\Users\Admin\AppData\Local\Temp\Naxor Crypter.exe
    Filesize

    1.9MB

    MD5

    eb62d522aa83250770fb5dfbe3136bda

    SHA1

    8e1b0a19575ef93cbe4f98b6ed252cf7a450ccdc

    SHA256

    f2936d5c363aca1604c2daacbfd086572c5956a0796a92f0d8f92001b9d0b971

    SHA512

    1b24cb54b5c3f907356e402afedee3603e81ceb5858bd3fcb52c349c42afbf6a426e9236d2c871b4191c21a4e799c5af0db0773822dfa6a3be128d776ec78be5

  • C:\Users\Admin\AppData\Local\Temp\Naxor.exe
    Filesize

    1.1MB

    MD5

    33dbbf2d55dc60f7c88638c145d0f716

    SHA1

    36bc559e602d931a6255c4286b7eeb7baf01bf11

    SHA256

    9333f355306caaf9d0b292c7268e3d3475b297533437a4fa7568b7743be30db6

    SHA512

    09d88f26867fb8dd1d11e5eecd16d5f952c9c8786ccd6a637ac65da0e2ed127d5ed819110ce344b38cdeec4b2219ead868ea75d3b6a9a6cb8fa53862ec7a7157

  • C:\Users\Admin\AppData\Local\Temp\svhost.exe
    Filesize

    89KB

    MD5

    84c42d0f2c1ae761bef884638bc1eacd

    SHA1

    4353881e7f4e9c7610f4e0489183b55bb58bb574

    SHA256

    331487446653875bf1e628b797a5283e40056654f7ff328eafbe39b0304480d3

    SHA512

    43c307a38faa3a4b311597034cf75035a4434a1024d2a54e867e6a94b53b677898d71a858438d119000e872a7a6e92c5b31d277a8c207a94375ed4fd3c7beb87

  • C:\Users\Admin\AppData\Roaming\Crypter\aKKKKK.xml
    Filesize

    1KB

    MD5

    ca6d074a05f58034f6640b0a7a48927a

    SHA1

    f3c693d4412d18dd14c695cf4287f11df25caf4d

    SHA256

    1df8651f3825fd8edb9d3fa3294b36da9723c125dcaf594be32e64b334b171ae

    SHA512

    6cd30ab071ba46cb341ea42c8cbaeeae8d128d5350c4ea4d7124451d85b8a1633c66657d53d41ef1acb0d460acc88cd44b0b264797ed58c5e85652a5cca87427

  • memory/1196-58-0x0000000005A50000-0x0000000005A5A000-memory.dmp
    Filesize

    40KB

  • memory/1196-59-0x0000000005C80000-0x0000000005CD6000-memory.dmp
    Filesize

    344KB

  • memory/1196-57-0x0000000005AF0000-0x0000000005B82000-memory.dmp
    Filesize

    584KB

  • memory/1196-56-0x0000000006000000-0x00000000065A4000-memory.dmp
    Filesize

    5.6MB

  • memory/1196-52-0x0000000005970000-0x0000000005A0C000-memory.dmp
    Filesize

    624KB

  • memory/1196-49-0x0000000000F00000-0x00000000010F6000-memory.dmp
    Filesize

    2.0MB

  • memory/4476-6-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/4476-8-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/4476-79-0x0000000074B40000-0x00000000750F1000-memory.dmp
    Filesize

    5.7MB

  • memory/4476-20-0x0000000074B40000-0x00000000750F1000-memory.dmp
    Filesize

    5.7MB

  • memory/4476-18-0x0000000074B40000-0x00000000750F1000-memory.dmp
    Filesize

    5.7MB

  • memory/4476-78-0x0000000074B40000-0x00000000750F1000-memory.dmp
    Filesize

    5.7MB

  • memory/4476-13-0x0000000074B40000-0x00000000750F1000-memory.dmp
    Filesize

    5.7MB

  • memory/4476-26-0x0000000074B40000-0x00000000750F1000-memory.dmp
    Filesize

    5.7MB

  • memory/4476-7-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/4480-0-0x0000000074B42000-0x0000000074B43000-memory.dmp
    Filesize

    4KB

  • memory/4480-2-0x0000000074B40000-0x00000000750F1000-memory.dmp
    Filesize

    5.7MB

  • memory/4480-1-0x0000000074B40000-0x00000000750F1000-memory.dmp
    Filesize

    5.7MB

  • memory/4480-22-0x0000000074B40000-0x00000000750F1000-memory.dmp
    Filesize

    5.7MB

  • memory/4996-54-0x0000000000400000-0x000000000040E000-memory.dmp
    Filesize

    56KB