Analysis

  • max time kernel
    121s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-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.

  • 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 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b4a76ec2287a65963ea978ae7911b8c42c3411a21c995463985599d975e9960c.exe
    "C:\Users\Admin\AppData\Local\Temp\b4a76ec2287a65963ea978ae7911b8c42c3411a21c995463985599d975e9960c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2156
    • 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:2744
    • 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:1948
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\dsiayzgxX" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4EDB.tmp"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2664
    • 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:2684
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "NTFS Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmp50A0.tmp"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2856
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "NTFS Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp512D.tmp"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2988

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

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp4EDB.tmp
    Filesize

    1KB

    MD5

    451694b44e16d20ee1f298da96dd0f58

    SHA1

    f308d663153469403ce358febf4cbf6f408acccc

    SHA256

    99646a20b2de3494907c71a8d2b2c616af68513bade2e0cafc6af49869d8b8b1

    SHA512

    4e61a15db53137ea569aff1472dd6747b208ef383f0c8c87610351708efd5a452e48a939a96ce16d287ab5fc7de14123a163fc3807a0a0983ee8858365221566

  • C:\Users\Admin\AppData\Local\Temp\tmp50A0.tmp
    Filesize

    1KB

    MD5

    cabdc89a33b52830601190421a4838a9

    SHA1

    94fc2d24b510c8f19ad2cda8f391e5893666ae68

    SHA256

    273dd05dea08a08008bbcc67b4fc726817a87c270fdccb97319a990869905b99

    SHA512

    b3273af6953c6e01a327faa305478f54c3a0528c1853d8e7c517ba6d616f8850ee9d9ecaaaa5896ce8584d63e911a59af5e24df94e0b2f4ee100b12f3b2de965

  • C:\Users\Admin\AppData\Local\Temp\tmp512D.tmp
    Filesize

    1KB

    MD5

    981e126601526eaa5b0ad45c496c4465

    SHA1

    d610d6a21a8420cc73fcd3e54ddae75a5897b28b

    SHA256

    11ae277dfa39e7038b782ca6557339e7fe88533fe83705c356a1500a1402d527

    SHA512

    a59fb704d931ccb7e1ec1a7b98e24ccd8708be529066c6de4b673098cdebef539f7f50d9e051c43954b5a8e7f810862b3a4ede170f131e080dadc3e763ed4bdb

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

    7KB

    MD5

    679eefca1a23f2ab37681d9c1766c9ba

    SHA1

    cf4c7a3f5b378f8d41d05369321efd2e1105966c

    SHA256

    6f9ff78ed3442016976e11e1ec80b8692cb390f781da50e8acffef28e5a2c627

    SHA512

    813d699220721b1132d141faa93ceb9f5567d45db40336448d392d5ba7392a1f14b159fec0c6119144fd0107e5122bac05a348745aeb7ea1bab0b66b4967a9f2

  • memory/2156-31-0x0000000074D00000-0x00000000753EE000-memory.dmp
    Filesize

    6.9MB

  • memory/2156-1-0x0000000000DB0000-0x0000000000E48000-memory.dmp
    Filesize

    608KB

  • memory/2156-2-0x0000000074D00000-0x00000000753EE000-memory.dmp
    Filesize

    6.9MB

  • memory/2156-3-0x00000000004B0000-0x00000000004C4000-memory.dmp
    Filesize

    80KB

  • memory/2156-4-0x00000000004E0000-0x00000000004E8000-memory.dmp
    Filesize

    32KB

  • memory/2156-5-0x0000000000540000-0x000000000054C000-memory.dmp
    Filesize

    48KB

  • memory/2156-6-0x0000000000B50000-0x0000000000BCC000-memory.dmp
    Filesize

    496KB

  • memory/2156-0-0x0000000074D0E000-0x0000000074D0F000-memory.dmp
    Filesize

    4KB

  • memory/2684-19-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/2684-42-0x00000000006E0000-0x00000000006EA000-memory.dmp
    Filesize

    40KB

  • memory/2684-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/2684-25-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/2684-23-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/2684-29-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/2684-30-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/2684-21-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/2684-39-0x0000000000460000-0x000000000046A000-memory.dmp
    Filesize

    40KB

  • memory/2684-40-0x00000000004B0000-0x00000000004BC000-memory.dmp
    Filesize

    48KB

  • memory/2684-41-0x00000000006B0000-0x00000000006CE000-memory.dmp
    Filesize

    120KB

  • memory/2684-28-0x0000000000400000-0x000000000043A000-memory.dmp
    Filesize

    232KB

  • memory/2684-45-0x0000000000770000-0x0000000000782000-memory.dmp
    Filesize

    72KB

  • memory/2684-46-0x00000000007C0000-0x00000000007DA000-memory.dmp
    Filesize

    104KB

  • memory/2684-47-0x0000000000830000-0x000000000083E000-memory.dmp
    Filesize

    56KB

  • memory/2684-49-0x0000000000860000-0x000000000086E000-memory.dmp
    Filesize

    56KB

  • memory/2684-48-0x0000000000850000-0x0000000000862000-memory.dmp
    Filesize

    72KB

  • memory/2684-50-0x0000000000930000-0x000000000093C000-memory.dmp
    Filesize

    48KB

  • memory/2684-51-0x0000000000C70000-0x0000000000C84000-memory.dmp
    Filesize

    80KB

  • memory/2684-52-0x0000000000C80000-0x0000000000C90000-memory.dmp
    Filesize

    64KB

  • memory/2684-53-0x0000000000D90000-0x0000000000DA4000-memory.dmp
    Filesize

    80KB

  • memory/2684-54-0x0000000002330000-0x000000000233E000-memory.dmp
    Filesize

    56KB

  • memory/2684-55-0x00000000023A0000-0x00000000023CE000-memory.dmp
    Filesize

    184KB

  • memory/2684-56-0x0000000002350000-0x0000000002364000-memory.dmp
    Filesize

    80KB