Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20251015-en
  • resource tags

    arch:x64arch:x86image:win11-20251015-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21/11/2025, 04:37

General

  • Target
    PO _ FL045835680 TL057638990 19th November 2025 Mumbai 001.exe
  • Size 657KB
  • Sample251121-e9bplscn6w
  • SHA256 e8e92832fb6fd6f8bccc6f890a599da44b92ed1a488a129a83efc01017cc5e7b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • nanocore

Version
  • 1.2.2.0

C2
  • appremiumoilfield.duckdns.org:55008

  • linmaco001.abrdns.com:55008

Mutex
  • fe98492f-10ac-4dc4-8a8b-6c2e81662ff0

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    linmaco001.abrdns.com

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65538

  • build_time

    2025-08-19T03:28:25.438974436Z

  • 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

    55008

  • default_group

    ON GOD

  • 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

    fe98492f-10ac-4dc4-8a8b-6c2e81662ff0

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    appremiumoilfield.duckdns.org

  • 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

    8009

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.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 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 12 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 4 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 34 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PO _ FL045835680 TL057638990 19th November 2025 Mumbai 001.exe
    "C:\Users\Admin\AppData\Local\Temp\PO _ FL045835680 TL057638990 19th November 2025 Mumbai 001.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4580
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\atzZLc.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4080
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\atzZLc" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1A3A.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:5620
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      2⤵
      • Adds Run key to start application
      • 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:5240
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SMTP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1C0F.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3392
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "SMTP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1CBB.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:4484
  • C:\Users\Admin\AppData\Roaming\atzZLc.exe
    C:\Users\Admin\AppData\Roaming\atzZLc.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2996
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\atzZLc.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:3908
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\atzZLc" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD7FC.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2128
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2060
  • C:\Program Files (x86)\SMTP Service\smtpsv.exe
    "C:\Program Files (x86)\SMTP Service\smtpsv.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    PID:2316
  • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
    "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:4928

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        smtpsv.exe

        • Path C:\Program Files (x86)\SMTP Service\smtpsv.exe
        • Size 45KB
        • SHA256 808aec47f908410c01f820683f1c33198e05525d159863925690fdeb319eac1a
        • MD5 SHA1 SHA512 SSDEEP

        RegSvcs.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\RegSvcs.exe.log
        • Size 142B
        • SHA256 c578e86db701b9afa3626e804cf434f9d32272ff59fb32fa9a51835e5a148b53
        • MD5 SHA1 SHA512

        powershell.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
        • Size 2KB
        • SHA256 9600b3fdf0565ccb49e21656aa4b24d7c18f776bfd04d9ee984b134707550f02
        • MD5 SHA1 SHA512

        StartupProfileData-NonInteractive

        • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
        • Size 18KB
        • SHA256 eeeb0859efead725a088718efc24b5e54fdea6258252c11978e31adc6041209e
        • MD5 SHA1 SHA512 SSDEEP

        __PSScriptPolicyTest_ez0hwde5.ui3.ps1

        • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ez0hwde5.ui3.ps1
        • Size 60B
        • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
        • MD5 SHA1 SHA512

        tmp1A3A.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmp1A3A.tmp
        • Size 1KB
        • SHA256 ff621c77d374c0caaae7750b337505ff369ddab1d61e4f90cf399bb079c16937
        • MD5 SHA1 SHA512

        tmp1C0F.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmp1C0F.tmp
        • Size 1KB
        • SHA256 3086d914f6b23268f8a12cb1a05516cd5465c2577e1d1e449f1b45c8e5e8f83c
        • MD5 SHA1 SHA512

        tmp1CBB.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmp1CBB.tmp
        • Size 1KB
        • SHA256 6fe1bdf3d1dedec102ac61b47fff909c53e0df8903098c52f3843b1e11a2d863
        • MD5 SHA1 SHA512

        atzZLc.exe

        • Path C:\Users\Admin\AppData\Roaming\atzZLc.exe
        • Size 657KB
        • SHA256 e8e92832fb6fd6f8bccc6f890a599da44b92ed1a488a129a83efc01017cc5e7b
        • MD5 SHA1 SHA512 SSDEEP

        memory/2316-48-0x0000000001160000-0x0000000001181000-memory.dmp

        memory/2316-47-0x0000000004F50000-0x0000000004F8C000-memory.dmp

        memory/2316-46-0x0000000000780000-0x000000000078E000-memory.dmp

        memory/2996-63-0x0000000004FC0000-0x0000000004FD6000-memory.dmp

        memory/3908-104-0x00000000714D0000-0x000000007151C000-memory.dmp

        memory/3908-98-0x0000000005C30000-0x0000000005F87000-memory.dmp

        memory/3908-103-0x00000000060F0000-0x000000000613C000-memory.dmp

        memory/3908-111-0x00000000072A0000-0x0000000007344000-memory.dmp

        memory/3908-112-0x0000000007620000-0x0000000007631000-memory.dmp

        memory/3908-113-0x0000000007660000-0x0000000007675000-memory.dmp

        memory/4080-50-0x0000000007120000-0x0000000007154000-memory.dmp

        memory/4080-67-0x00000000074C0000-0x00000000074D1000-memory.dmp

        memory/4080-38-0x0000000006360000-0x00000000063AC000-memory.dmp

        memory/4080-36-0x0000000005F70000-0x0000000005F8E000-memory.dmp

        memory/4080-22-0x0000000005A10000-0x0000000005A76000-memory.dmp

        memory/4080-21-0x00000000059A0000-0x0000000005A06000-memory.dmp

        memory/4080-13-0x0000000004AE0000-0x0000000004B16000-memory.dmp

        memory/4080-71-0x00000000075F0000-0x00000000075F8000-memory.dmp

        memory/4080-70-0x0000000007600000-0x000000000761A000-memory.dmp

        memory/4080-20-0x0000000005800000-0x0000000005822000-memory.dmp

        memory/4080-69-0x0000000007500000-0x0000000007515000-memory.dmp

        memory/4080-17-0x00000000051A0000-0x00000000057CA000-memory.dmp

        memory/4080-14-0x0000000004B60000-0x0000000004B70000-memory.dmp

        memory/4080-68-0x00000000074F0000-0x00000000074FE000-memory.dmp

        memory/4080-51-0x0000000071180000-0x00000000711CC000-memory.dmp

        memory/4080-58-0x0000000006540000-0x000000000655E000-memory.dmp

        memory/4080-59-0x0000000007160000-0x0000000007204000-memory.dmp

        memory/4080-29-0x0000000005A80000-0x0000000005DD7000-memory.dmp

        memory/4080-61-0x0000000007900000-0x0000000007F7A000-memory.dmp

        memory/4080-62-0x00000000072B0000-0x00000000072CA000-memory.dmp

        memory/4080-15-0x0000000004B60000-0x0000000004B70000-memory.dmp

        memory/4080-65-0x0000000007330000-0x000000000733A000-memory.dmp

        memory/4080-66-0x0000000007540000-0x00000000075D6000-memory.dmp

        memory/4580-8-0x0000000009B60000-0x0000000009BFC000-memory.dmp

        memory/4580-0-0x0000000000F50000-0x0000000000FFA000-memory.dmp

        memory/4580-1-0x0000000006040000-0x00000000065E6000-memory.dmp

        memory/4580-2-0x0000000005B30000-0x0000000005BC2000-memory.dmp

        memory/4580-3-0x0000000005C80000-0x0000000005C90000-memory.dmp

        memory/4580-4-0x0000000005AB0000-0x0000000005ABA000-memory.dmp

        memory/4580-5-0x0000000005DA0000-0x0000000005DB6000-memory.dmp

        memory/4580-6-0x0000000005C80000-0x0000000005C90000-memory.dmp

        memory/4580-7-0x00000000074B0000-0x000000000752E000-memory.dmp

        memory/4928-60-0x00000000018D0000-0x00000000018F1000-memory.dmp

        memory/5240-76-0x0000000006A40000-0x0000000006A52000-memory.dmp

        memory/5240-83-0x0000000006B00000-0x0000000006B14000-memory.dmp

        memory/5240-82-0x0000000006AC0000-0x0000000006AEE000-memory.dmp

        memory/5240-41-0x0000000005060000-0x000000000506A000-memory.dmp

        memory/5240-81-0x0000000006AB0000-0x0000000006ABE000-memory.dmp

        memory/5240-80-0x0000000006AA0000-0x0000000006AB4000-memory.dmp

        memory/5240-79-0x0000000006A90000-0x0000000006A9E000-memory.dmp

        memory/5240-78-0x0000000006A80000-0x0000000006A92000-memory.dmp

        memory/5240-77-0x0000000006A50000-0x0000000006A6A000-memory.dmp

        memory/5240-42-0x0000000005270000-0x000000000528E000-memory.dmp

        memory/5240-43-0x0000000005F50000-0x0000000005F5A000-memory.dmp

        memory/5240-18-0x0000000000400000-0x0000000000438000-memory.dmp