Resubmissions

07/03/2025, 11:50

250307-nztbcazqx8 10

07/03/2025, 07:24

250307-h8ftqawtft 10

Analysis

  • max time kernel
    145s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    07/03/2025, 11:50

General

  • Target

    d3d5963442e6c36209ec3b38d4e16600283423af9c2a212291bb6cd7e8a837e7.exe

  • Size

    3.7MB

  • MD5

    ef284d2e02d57b7090632e1bf06b8fa3

  • SHA1

    85c5c5dc98d3d49478635f1d846761ab21ff7827

  • SHA256

    d3d5963442e6c36209ec3b38d4e16600283423af9c2a212291bb6cd7e8a837e7

  • SHA512

    2d2e4c7d85626be637b5f959b72de9493759adfff7a6e4a7a640f7a02102b68714f039f85570770952f9b7546a6664c0f7879fc5e07ff3a83e630808069dfb57

  • SSDEEP

    3072:WM/ZmolMbeDeDejyCeaev0beJ0kXC0ex75qlyrBmkepbe3eTLe3UzoeyeYHIHO+r:

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

backu4734.duckdns.org:8092

Mutex

ccf3c62d-d356-4a80-bb94-307bc35a5e01

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    backu4734.duckdns.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-01-05T15:22:20.555580436Z

  • 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

    8092

  • default_group

    Backup

  • 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

    ccf3c62d-d356-4a80-bb94-307bc35a5e01

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    backu4734.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

    8000

Signatures

  • NanoCore

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

  • Nanocore family
  • Windows security bypass 2 TTPs 3 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

  • Windows security modification 2 TTPs 4 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 10 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 41 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d3d5963442e6c36209ec3b38d4e16600283423af9c2a212291bb6cd7e8a837e7.exe
    "C:\Users\Admin\AppData\Local\Temp\d3d5963442e6c36209ec3b38d4e16600283423af9c2a212291bb6cd7e8a837e7.exe"
    1⤵
    • Windows security bypass
    • Windows security modification
    • Adds Run key to start application
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1632
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Windows\Cursors\dbe9ct81Se8a4fj44Ve\svchost.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:560
    • 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\d3d5963442e6c36209ec3b38d4e16600283423af9c2a212291bb6cd7e8a837e7.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3024
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Windows\Cursors\dbe9ct81Se8a4fj44Ve\svchost.exe" -Force
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2264
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2092
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:2564
    • C:\Users\Admin\AppData\Local\Temp\d3d5963442e6c36209ec3b38d4e16600283423af9c2a212291bb6cd7e8a837e7.exe
      "C:\Users\Admin\AppData\Local\Temp\d3d5963442e6c36209ec3b38d4e16600283423af9c2a212291bb6cd7e8a837e7.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:2588
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "UDP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpF3A2.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2780
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "UDP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpF47D.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2064
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1632 -s 928
      2⤵
      • Program crash
      PID:1932

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpF3A2.tmp

    Filesize

    1KB

    MD5

    3fbf14339a82779a96ebe15d61e84dc7

    SHA1

    11a57b2c1bfb3559d4b2d09054d4fa63912d260c

    SHA256

    c9f9a132e24f96a42e87d7e5596f991666c4c208fd5eceddb14b8202f30e0b9a

    SHA512

    94f2a2d8982183cf69ae981da42b47b97d3db46b7612c8eeddf348d27c4b4c0a8e0cdc8e42f17da826673dda75e24d7e8e0e3be9690f455dca70ada0d5eeb429

  • C:\Users\Admin\AppData\Local\Temp\tmpF47D.tmp

    Filesize

    1KB

    MD5

    0a24db62cb5b84309c4803346caaa25d

    SHA1

    67660778f61bb44168c33ed3fe56ed86cf9583e8

    SHA256

    38d38647af394a04ee6add9f05c43244f04e64a6b96257f4b241a5038efa82df

    SHA512

    d25d9df063f44595d5e0bf890755bd387655131ff369eeedf3d11ffcc6202ca4455bbb33a8a926dd06839cbd1ddec3d06809b3c66a82c6518aa14beaa469a548

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    196fe6b6d0380acbf8baa759297fa9bb

    SHA1

    f1b4eac369f116717aba61a8bb622829308b3bd9

    SHA256

    eaa612494b85adb169fc2e465fca78941363347716b188654d7aed201cf47fdd

    SHA512

    b84a0a47c9193f9857243276cb66dafaae2dd2bf4b3d1b5ec558eb61e4f0f7c92ea454b7647204fe2f92df2e672c810c8950d236672548ef838b3a930542d7d3

  • memory/1632-0-0x0000000074CBE000-0x0000000074CBF000-memory.dmp

    Filesize

    4KB

  • memory/1632-1-0x0000000000B60000-0x0000000000F12000-memory.dmp

    Filesize

    3.7MB

  • memory/1632-2-0x0000000000620000-0x00000000006BC000-memory.dmp

    Filesize

    624KB

  • memory/1632-3-0x0000000074CB0000-0x000000007539E000-memory.dmp

    Filesize

    6.9MB

  • memory/1632-39-0x0000000074CB0000-0x000000007539E000-memory.dmp

    Filesize

    6.9MB

  • memory/2588-26-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2588-28-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2588-27-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2588-25-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

    Filesize

    4KB

  • memory/2588-23-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2588-21-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2588-19-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB

  • memory/2588-36-0x0000000000500000-0x000000000050A000-memory.dmp

    Filesize

    40KB

  • memory/2588-37-0x00000000005F0000-0x000000000060E000-memory.dmp

    Filesize

    120KB

  • memory/2588-38-0x0000000000510000-0x000000000051A000-memory.dmp

    Filesize

    40KB

  • memory/2588-17-0x0000000000400000-0x000000000043A000-memory.dmp

    Filesize

    232KB