Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18-06-2024 18:19

General

  • Target

    b4a76ec2287a65963ea978ae7911b8c42c3411a21c995463985599d975e9960c.exe

  • Size

    585KB

  • MD5

    41d27d71597c9d1163fb58a816223962

  • SHA1

    2ae197a2724967fb0ae77ee0c20d95d354b9e5cb

  • SHA256

    b4a76ec2287a65963ea978ae7911b8c42c3411a21c995463985599d975e9960c

  • SHA512

    555aa48eaa46f83933e34c6e8ecaf79c8f1756fb9de79181e4132bc2d02c5789abba90458ad347a374f34fc829f83b36d6666f64a657bf7e99ca5cb9aac2e1a0

  • SSDEEP

    12288:2aYEnxStMSe+LQMNQ7ZQhIyOQSNSY2CNZ+TB29JvNgRh:J/nxSiSCMNQFwt3Jx8gB29Jv2

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

2023endofyear.duckdns.org:15170

127.0.0.1:15170

Mutex

68e7ea47-3f3c-4af7-9707-6d09d0468009

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2023-12-29T09:19:37.611227236Z

  • 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

    15170

  • default_group

    GLOBAL

  • 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

    68e7ea47-3f3c-4af7-9707-6d09d0468009

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    2023endofyear.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.

  • 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 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).

  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b4a76ec2287a65963ea978ae7911b8c42c3411a21c995463985599d975e9960c.exe
    "C:\Users\Admin\AppData\Local\Temp\b4a76ec2287a65963ea978ae7911b8c42c3411a21c995463985599d975e9960c.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2476
    • 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\b4a76ec2287a65963ea978ae7911b8c42c3411a21c995463985599d975e9960c.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3604
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\dsiayzgxX.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1644
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\dsiayzgxX" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7EE4.tmp"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:1040
    • C:\Users\Admin\AppData\Local\Temp\b4a76ec2287a65963ea978ae7911b8c42c3411a21c995463985599d975e9960c.exe
      "C:\Users\Admin\AppData\Local\Temp\b4a76ec2287a65963ea978ae7911b8c42c3411a21c995463985599d975e9960c.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:2532
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DPI Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp83E5.tmp"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4720
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DPI Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp852F.tmp"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4872

Network

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

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_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

    3d5d77b27751abd217735d7b930d22dd

    SHA1

    9ed8f43d9e338dc3dda5e6b9cc169bf7986b7e84

    SHA256

    398ade8b8491995d66a569bf10ef32a69cc0a386aecd9c1d261f41430c3b053c

    SHA512

    c1dcc91ffa64c56c6d2915d4da0a28960da1971198f60f4597c293a56b39fc9cb47458a862344da850caebb5efd05b45e4a7e79f2e3d8d04a8c4a2915f0badb9

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dkv1vrqj.sja.ps1
    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\tmp7EE4.tmp
    Filesize

    1KB

    MD5

    67f3841530a444959642da8346e17c6a

    SHA1

    4a0f70a8050d4f3c0f1c06b0513e47d110653605

    SHA256

    4a923b1b51b4477d9c93e804046eb974c4b160a9a257e85bc5835a2b56c9a73c

    SHA512

    f882f3b48ca210c5bbf15d8bcc3a43dfd40834850bd92e681249784022d75ca29368613695504702eb4840832a06e3560a277c08583431d1c275c1bb0cca098b

  • C:\Users\Admin\AppData\Local\Temp\tmp83E5.tmp
    Filesize

    1KB

    MD5

    cabdc89a33b52830601190421a4838a9

    SHA1

    94fc2d24b510c8f19ad2cda8f391e5893666ae68

    SHA256

    273dd05dea08a08008bbcc67b4fc726817a87c270fdccb97319a990869905b99

    SHA512

    b3273af6953c6e01a327faa305478f54c3a0528c1853d8e7c517ba6d616f8850ee9d9ecaaaa5896ce8584d63e911a59af5e24df94e0b2f4ee100b12f3b2de965

  • C:\Users\Admin\AppData\Local\Temp\tmp852F.tmp
    Filesize

    1KB

    MD5

    5fea24e883e06e4df6d240dc72abf2c5

    SHA1

    d778bf0f436141e02df4b421e8188abdcc9a84a4

    SHA256

    e858982f4ab3c74f7a8903eea18c0f73501a77273ae38b54d5c9dec997e79a66

    SHA512

    15afc2ffbbee14d28a5ff8dc8285d01c942147aada36fb33e31045a4e998769b51738bebe199bcad3462f918b535845a893aa2f80c84b9c795cd1fee4a327924

  • memory/1644-44-0x0000000074A50000-0x0000000075200000-memory.dmp
    Filesize

    7.7MB

  • memory/1644-34-0x0000000074A50000-0x0000000075200000-memory.dmp
    Filesize

    7.7MB

  • memory/1644-62-0x00000000752E0000-0x000000007532C000-memory.dmp
    Filesize

    304KB

  • memory/1644-23-0x0000000074A50000-0x0000000075200000-memory.dmp
    Filesize

    7.7MB

  • memory/1644-72-0x0000000006190000-0x00000000061AE000-memory.dmp
    Filesize

    120KB

  • memory/1644-33-0x0000000005660000-0x00000000059B4000-memory.dmp
    Filesize

    3.3MB

  • memory/1644-61-0x0000000006C90000-0x0000000006CC2000-memory.dmp
    Filesize

    200KB

  • memory/1644-95-0x0000000074A50000-0x0000000075200000-memory.dmp
    Filesize

    7.7MB

  • memory/1644-89-0x00000000071C0000-0x00000000071CE000-memory.dmp
    Filesize

    56KB

  • memory/1644-87-0x0000000007210000-0x00000000072A6000-memory.dmp
    Filesize

    600KB

  • memory/1644-85-0x0000000007600000-0x0000000007C7A000-memory.dmp
    Filesize

    6.5MB

  • memory/2476-8-0x0000000005FD0000-0x0000000005FDC000-memory.dmp
    Filesize

    48KB

  • memory/2476-0-0x0000000074A5E000-0x0000000074A5F000-memory.dmp
    Filesize

    4KB

  • memory/2476-9-0x0000000006030000-0x00000000060AC000-memory.dmp
    Filesize

    496KB

  • memory/2476-7-0x0000000005FC0000-0x0000000005FC8000-memory.dmp
    Filesize

    32KB

  • memory/2476-6-0x0000000004FE0000-0x0000000004FF4000-memory.dmp
    Filesize

    80KB

  • memory/2476-4-0x0000000004DF0000-0x0000000004DFA000-memory.dmp
    Filesize

    40KB

  • memory/2476-5-0x0000000074A50000-0x0000000075200000-memory.dmp
    Filesize

    7.7MB

  • memory/2476-1-0x0000000000490000-0x0000000000528000-memory.dmp
    Filesize

    608KB

  • memory/2476-47-0x0000000074A50000-0x0000000075200000-memory.dmp
    Filesize

    7.7MB

  • memory/2476-10-0x00000000087E0000-0x000000000887C000-memory.dmp
    Filesize

    624KB

  • memory/2476-3-0x0000000004E50000-0x0000000004EE2000-memory.dmp
    Filesize

    584KB

  • memory/2476-2-0x0000000005400000-0x00000000059A4000-memory.dmp
    Filesize

    5.6MB

  • memory/2532-45-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/2532-60-0x00000000066A0000-0x00000000066AA000-memory.dmp
    Filesize

    40KB

  • memory/2532-57-0x0000000006470000-0x000000000647A000-memory.dmp
    Filesize

    40KB

  • memory/2532-59-0x0000000006650000-0x000000000666E000-memory.dmp
    Filesize

    120KB

  • memory/2532-58-0x0000000006640000-0x000000000664C000-memory.dmp
    Filesize

    48KB

  • memory/3604-48-0x0000000005D80000-0x0000000005D9E000-memory.dmp
    Filesize

    120KB

  • memory/3604-49-0x0000000005E60000-0x0000000005EAC000-memory.dmp
    Filesize

    304KB

  • memory/3604-20-0x0000000004EE0000-0x0000000004F46000-memory.dmp
    Filesize

    408KB

  • memory/3604-73-0x00000000752E0000-0x000000007532C000-memory.dmp
    Filesize

    304KB

  • memory/3604-83-0x0000000006FA0000-0x0000000007043000-memory.dmp
    Filesize

    652KB

  • memory/3604-19-0x0000000004DC0000-0x0000000004DE2000-memory.dmp
    Filesize

    136KB

  • memory/3604-84-0x00000000070B0000-0x00000000070CA000-memory.dmp
    Filesize

    104KB

  • memory/3604-86-0x0000000007120000-0x000000000712A000-memory.dmp
    Filesize

    40KB

  • memory/3604-21-0x0000000004F50000-0x0000000004FB6000-memory.dmp
    Filesize

    408KB

  • memory/3604-88-0x00000000072B0000-0x00000000072C1000-memory.dmp
    Filesize

    68KB

  • memory/3604-18-0x0000000074A50000-0x0000000075200000-memory.dmp
    Filesize

    7.7MB

  • memory/3604-90-0x00000000072F0000-0x0000000007304000-memory.dmp
    Filesize

    80KB

  • memory/3604-91-0x00000000073F0000-0x000000000740A000-memory.dmp
    Filesize

    104KB

  • memory/3604-92-0x00000000073D0000-0x00000000073D8000-memory.dmp
    Filesize

    32KB

  • memory/3604-17-0x0000000074A50000-0x0000000075200000-memory.dmp
    Filesize

    7.7MB

  • memory/3604-16-0x0000000004FE0000-0x0000000005608000-memory.dmp
    Filesize

    6.2MB

  • memory/3604-15-0x00000000024A0000-0x00000000024D6000-memory.dmp
    Filesize

    216KB

  • memory/3604-99-0x0000000074A50000-0x0000000075200000-memory.dmp
    Filesize

    7.7MB