Analysis

  • max time kernel
    1798s
  • max time network
    1799s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-12-2024 20:57

General

  • Target

    b2c04bb4-1039-4836-bca6-bd4211df1190.exe

  • Size

    524KB

  • MD5

    81ffddf2c1d7905204a67f6577e2dc68

  • SHA1

    a89c37a3e12a46ac714887d509a1849791b4b244

  • SHA256

    5713df54ae15a1a47a87436d1c7ddc06338f9c31276880d6d2ae29d2655313e7

  • SHA512

    b871a001fa251a9af36788ceda94ece6772a5f318120db5cada7643e66da7978d0a0f373ab271c15b45a0947f1161ee60284c0621e25e07ea81864a3c8945e4a

  • SSDEEP

    6144:dLeno+U3zituONCfDq/ib4IKEQwpUgQ/Fn7r+DHZ8q6PTZKWCaYVZ6qXW4bPwDJr:sRC+ab4aQlhFnPA81X/Y1cNm+1v6pP

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

original-financial.gl.at.ply.gg:28916

Mutex

d516db18-d565-4fff-a872-0ad0fd1f18ca

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    original-financial.gl.at.ply.gg

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2024-09-13T19:32:56.304391136Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    28916

  • 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

    d516db18-d565-4fff-a872-0ad0fd1f18ca

  • 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

Signatures

  • NanoCore

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

  • Nanocore family
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 13 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\b2c04bb4-1039-4836-bca6-bd4211df1190.exe
    "C:\Users\Admin\AppData\Local\Temp\b2c04bb4-1039-4836-bca6-bd4211df1190.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4228
    • C:\Users\Admin\AppData\Local\Temp\111111111111111111111111111111111111.exe
      "C:\Users\Admin\AppData\Local\Temp\111111111111111111111111111111111111.exe"
      2⤵
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:3432
    • C:\Users\Admin\AppData\Local\Temp\injection.exe
      "C:\Users\Admin\AppData\Local\Temp\injection.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3520
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\wlanext.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2800
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'wlanext.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1300
    • C:\Users\Admin\AppData\Local\Temp\Setup.exe
      "C:\Users\Admin\AppData\Local\Temp\Setup.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:3912
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1540
  • C:\Users\Admin\AppData\Roaming\wlanext.exe
    C:\Users\Admin\AppData\Roaming\wlanext.exe
    1⤵
    • Executes dropped EXE
    • Checks whether UAC is enabled
    • Suspicious use of AdjustPrivilegeToken
    PID:3588

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2KB

    MD5

    d85ba6ff808d9e5444a4b369f5bc2730

    SHA1

    31aa9d96590fff6981b315e0b391b575e4c0804a

    SHA256

    84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

    SHA512

    8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

    Filesize

    944B

    MD5

    77d622bb1a5b250869a3238b9bc1402b

    SHA1

    d47f4003c2554b9dfc4c16f22460b331886b191b

    SHA256

    f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

    SHA512

    d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

  • C:\Users\Admin\AppData\Local\Temp\111111111111111111111111111111111111.exe

    Filesize

    209KB

    MD5

    9258d024ee6fbfe283978e89e25cbc50

    SHA1

    123f1309dbc98824ec2ebb12f9883a07b873820e

    SHA256

    392a00e29a7305ead657c6c10d80b446f8b6bfe25a171e63e43439695f40410a

    SHA512

    993b2a16cfdc8dbd99753349f923a6baf1e801f79d7fb6aa39e15f617b4f798f355a9edddc9e7579ece562e1c254299e974ac46e70efe576a0985554fec15913

  • C:\Users\Admin\AppData\Local\Temp\Setup.exe

    Filesize

    124KB

    MD5

    fb47cb26a0c7480148a8d0c8f8e01be1

    SHA1

    bff6e89f3f724f79b136a4af7e6be03ff8d945e8

    SHA256

    255472e23f31eebe810f217212bf9caa39a30cac423dbe9893b554308da7db4b

    SHA512

    59bf831d10f9b2787e8152c2eea2abc8d131a9b45986da21d0cd6b38b43907becad39c332ed2c251bb3c28c14bfa022a7635487230a1f8643fb7ac20f1518ee7

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lt0e5orh.btv.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\injection.exe

    Filesize

    399KB

    MD5

    153deb0e0ffc0b476d5bba8a69778dde

    SHA1

    4ef44b30281e61ffdb74c4b3c0ec5e5bab8fa08f

    SHA256

    4ba3120b20dadb2ba430ca2bb5cb492bf0adbb4a6685c4c757086e6f46d5d607

    SHA512

    00f58ffa67c2ee992f1904a3a923e80ee350956b4690eadd9dbfa8b4e6897ab4d598493f1bca3781cca0849184a3a40f21424efcc3e90d436d76540da5a89bf4

  • C:\Users\Admin\AppData\Roaming\896DE533-E5FB-4EB9-8F2B-D363F3584DC5\run.dat

    Filesize

    8B

    MD5

    f831628fa25c12cb3992ebef61e3e634

    SHA1

    60f1088d75f544cf0b1e9f2acb5aeb73561efd05

    SHA256

    8dad628d5f9f150fb456c62414d9b647cf5b6e265f938cbc743ff921758ba091

    SHA512

    61a4e686345936dbfb98791c15a8154fbe6df038e0181fa80f4f07f2a81128d99118c792cc1c16de8c31149aaf7a19257df7cdd5d2e78b71a1cd6483e56213cf

  • memory/2800-45-0x0000023D62410000-0x0000023D62432000-memory.dmp

    Filesize

    136KB

  • memory/3432-36-0x00000000016C0000-0x00000000016D0000-memory.dmp

    Filesize

    64KB

  • memory/3432-71-0x00000000016C0000-0x00000000016D0000-memory.dmp

    Filesize

    64KB

  • memory/3520-34-0x00007FF8244B0000-0x00007FF824F71000-memory.dmp

    Filesize

    10.8MB

  • memory/3520-35-0x0000000000EC0000-0x0000000000F2A000-memory.dmp

    Filesize

    424KB

  • memory/3520-69-0x00007FF8244B0000-0x00007FF824F71000-memory.dmp

    Filesize

    10.8MB

  • memory/3588-68-0x000000001B720000-0x000000001B75A000-memory.dmp

    Filesize

    232KB

  • memory/4228-37-0x00007FF8244B0000-0x00007FF824F71000-memory.dmp

    Filesize

    10.8MB

  • memory/4228-0-0x00007FF8244B3000-0x00007FF8244B5000-memory.dmp

    Filesize

    8KB

  • memory/4228-3-0x00007FF8244B0000-0x00007FF824F71000-memory.dmp

    Filesize

    10.8MB

  • memory/4228-1-0x0000000000580000-0x0000000000608000-memory.dmp

    Filesize

    544KB