Analysis

  • max time kernel
    140s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-04-2024 04:26

General

  • Target

    gK5vkTm6WAcfbiz.exe

  • Size

    630KB

  • MD5

    55abd8961bb1559aacdd14bc4abe2948

  • SHA1

    cff001eea9b43d712fbcc4cf9fb9b136f8c4109d

  • SHA256

    0117ba3b90a77a00da548bf15490d6623de69e535d75fbbce8279b91c82f5ef6

  • SHA512

    e5a6e38bc943c2b6fe7c157f3e719303c7b216edf3d483dd7c2b7a4267dd3d0d6b500015ef96d3c041e2032e6aabec6787bebb6f4af3f2070d9cb9fa8d2b4c2b

  • SSDEEP

    12288:KjB778QTJ4oNyNN1N84trNRngS5B2/JD3CJMJjEebEPs18VT1IMajPsWj6Mr:UBlJ4tNXN84NgSUtCW1EeAaihaDsWj6Q

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

december2nd.ddns.net:64418

december2n.duckdns.org:64418

Mutex

a73ea09a-fffa-47fc-8cf2-8699258828eb

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    december2n.duckdns.org

  • backup_dns_server

  • buffer_size

    65538

  • build_time

    2024-02-03T01:52:12.147368736Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    64418

  • default_group

    NO GREE

  • enable_debug_mode

    true

  • gc_threshold

    1.0485772e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2500

  • max_packet_size

    1.0485772e+07

  • mutex

    a73ea09a-fffa-47fc-8cf2-8699258828eb

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    december2nd.ddns.net

  • primary_dns_server

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • set_critical_process

    false

  • timeout_interval

    5000

  • use_custom_dns_server

    false

  • version

    1.2.2.0

  • wan_timeout

    8009

Signatures

  • NanoCore

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

  • 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).

  • 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 14 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe
    "C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3708
    • 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\gK5vkTm6WAcfbiz.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2976
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ZYoQJBONC.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3016
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ZYoQJBONC" /XML "C:\Users\Admin\AppData\Local\Temp\tmp97EA.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1928
    • C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.exe
      "C:\Users\Admin\AppData\Local\Temp\gK5vkTm6WAcfbiz.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:4516
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "WPA Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9C9E.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:3312
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "WPA Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9E93.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:452

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    2KB

    MD5

    968cb9309758126772781b83adb8a28f

    SHA1

    8da30e71accf186b2ba11da1797cf67f8f78b47c

    SHA256

    92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

    SHA512

    4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    18KB

    MD5

    d9056b96ab2f59a53cb585f5526f40e8

    SHA1

    2b199b3e6b66c4ad57feeb4697228c68bec00bd9

    SHA256

    2bf64781c458232e50e15cb7abc08ae9ebf428eb69f9f6ffb981086fe1b76473

    SHA512

    5a084cc62171b3a214549b642f67afca916e8176b2b4756e341cbf30a552a973729f3143100fc4a950a2ede8cf721694be8dbb50224c9cced0bf7da2a2c45f97

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cfcxwefq.by3.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp97EA.tmp

    Filesize

    1KB

    MD5

    9ec38e48b712924ff7cd816fdb815153

    SHA1

    7312e5fc4c74c72d5fc30c2f8e38c756bff8cc44

    SHA256

    dbff0822c990b1865514c7c99ffd57ed387e8d5c9ad3871b92ebe8f8dbcd24d3

    SHA512

    ad93e5b8a480080b0c2327226e5344362beca7326eada3b88e3178a53d604be5e665064bed41149532e65dd277ae41fdd39ccf1057a52eb6ffe64a6e80e297f1

  • C:\Users\Admin\AppData\Local\Temp\tmp9C9E.tmp

    Filesize

    1KB

    MD5

    d4561c71381b52aaedee04fb1dd48775

    SHA1

    c8c2ff059414c1e9fd75a6f4e69067de017f5358

    SHA256

    7a0ff9bd88d411effa13a431e003693a1a3e5b5f02d0b68a6f42db98cc214b09

    SHA512

    c1bd2bab168965624bcb758f360f87492a4dfadb11a95b6becc98b670f43aa49adc6cb1c93e4bbf44333993d59c697fd8450dc3ce7377a4ebdad3650684b962f

  • C:\Users\Admin\AppData\Local\Temp\tmp9E93.tmp

    Filesize

    1KB

    MD5

    1c18d34e4c00b9a6b81126a2f10bbb74

    SHA1

    9c975e7627bdb8d7af3615684d59fa02c3b81902

    SHA256

    ee68aecf2917fd9ddd167e6403d3149ac3dd7f346f3c9c66b6d75620b0ccd621

    SHA512

    75a3ecebd55c8e433199122925c7c612fe3ea23a93fbca10ed83c80f11396da428581e36c42e98a0eef5210630cea040ed0da076bfcb620ddb38dee7152b816d

  • memory/2976-84-0x0000000006AF0000-0x0000000006B93000-memory.dmp

    Filesize

    652KB

  • memory/2976-41-0x0000000005480000-0x00000000057D4000-memory.dmp

    Filesize

    3.3MB

  • memory/2976-99-0x0000000074910000-0x00000000750C0000-memory.dmp

    Filesize

    7.7MB

  • memory/2976-93-0x0000000007120000-0x0000000007128000-memory.dmp

    Filesize

    32KB

  • memory/2976-91-0x0000000007040000-0x0000000007054000-memory.dmp

    Filesize

    80KB

  • memory/2976-90-0x0000000007030000-0x000000000703E000-memory.dmp

    Filesize

    56KB

  • memory/2976-19-0x0000000004500000-0x0000000004510000-memory.dmp

    Filesize

    64KB

  • memory/2976-18-0x0000000074910000-0x00000000750C0000-memory.dmp

    Filesize

    7.7MB

  • memory/2976-17-0x0000000004510000-0x0000000004546000-memory.dmp

    Filesize

    216KB

  • memory/2976-20-0x0000000004B80000-0x00000000051A8000-memory.dmp

    Filesize

    6.2MB

  • memory/2976-87-0x0000000006E70000-0x0000000006E7A000-memory.dmp

    Filesize

    40KB

  • memory/2976-86-0x0000000006E00000-0x0000000006E1A000-memory.dmp

    Filesize

    104KB

  • memory/2976-63-0x00000000751C0000-0x000000007520C000-memory.dmp

    Filesize

    304KB

  • memory/2976-24-0x0000000005320000-0x0000000005386000-memory.dmp

    Filesize

    408KB

  • memory/2976-74-0x0000000005FE0000-0x0000000005FFE000-memory.dmp

    Filesize

    120KB

  • memory/2976-25-0x0000000005390000-0x00000000053F6000-memory.dmp

    Filesize

    408KB

  • memory/2976-23-0x0000000004AF0000-0x0000000004B12000-memory.dmp

    Filesize

    136KB

  • memory/3016-85-0x0000000007530000-0x0000000007BAA000-memory.dmp

    Filesize

    6.5MB

  • memory/3016-62-0x0000000006B50000-0x0000000006B82000-memory.dmp

    Filesize

    200KB

  • memory/3016-100-0x0000000074910000-0x00000000750C0000-memory.dmp

    Filesize

    7.7MB

  • memory/3016-92-0x0000000007230000-0x000000000724A000-memory.dmp

    Filesize

    104KB

  • memory/3016-49-0x0000000005BA0000-0x0000000005BBE000-memory.dmp

    Filesize

    120KB

  • memory/3016-50-0x0000000005C50000-0x0000000005C9C000-memory.dmp

    Filesize

    304KB

  • memory/3016-89-0x00000000070F0000-0x0000000007101000-memory.dmp

    Filesize

    68KB

  • memory/3016-88-0x0000000007170000-0x0000000007206000-memory.dmp

    Filesize

    600KB

  • memory/3016-21-0x0000000074910000-0x00000000750C0000-memory.dmp

    Filesize

    7.7MB

  • memory/3016-22-0x0000000002510000-0x0000000002520000-memory.dmp

    Filesize

    64KB

  • memory/3016-64-0x00000000751C0000-0x000000007520C000-memory.dmp

    Filesize

    304KB

  • memory/3708-14-0x0000000074910000-0x00000000750C0000-memory.dmp

    Filesize

    7.7MB

  • memory/3708-3-0x00000000054F0000-0x0000000005582000-memory.dmp

    Filesize

    584KB

  • memory/3708-8-0x00000000066C0000-0x00000000066D6000-memory.dmp

    Filesize

    88KB

  • memory/3708-6-0x00000000059C0000-0x00000000059D8000-memory.dmp

    Filesize

    96KB

  • memory/3708-1-0x0000000074910000-0x00000000750C0000-memory.dmp

    Filesize

    7.7MB

  • memory/3708-0-0x0000000000A40000-0x0000000000AE4000-memory.dmp

    Filesize

    656KB

  • memory/3708-7-0x00000000066B0000-0x00000000066BE000-memory.dmp

    Filesize

    56KB

  • memory/3708-2-0x0000000005A00000-0x0000000005FA4000-memory.dmp

    Filesize

    5.6MB

  • memory/3708-16-0x00000000056A0000-0x00000000056B0000-memory.dmp

    Filesize

    64KB

  • memory/3708-9-0x0000000006740000-0x00000000067BC000-memory.dmp

    Filesize

    496KB

  • memory/3708-4-0x00000000056A0000-0x00000000056B0000-memory.dmp

    Filesize

    64KB

  • memory/3708-5-0x00000000054E0000-0x00000000054EA000-memory.dmp

    Filesize

    40KB

  • memory/3708-10-0x0000000008ED0000-0x0000000008F6C000-memory.dmp

    Filesize

    624KB

  • memory/3708-48-0x0000000074910000-0x00000000750C0000-memory.dmp

    Filesize

    7.7MB

  • memory/4516-61-0x0000000006160000-0x000000000616A000-memory.dmp

    Filesize

    40KB

  • memory/4516-58-0x00000000050B0000-0x00000000050BA000-memory.dmp

    Filesize

    40KB

  • memory/4516-60-0x0000000005440000-0x000000000545E000-memory.dmp

    Filesize

    120KB

  • memory/4516-46-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/4516-59-0x00000000050C0000-0x00000000050CC000-memory.dmp

    Filesize

    48KB