Analysis

  • max time kernel
    141s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    23-12-2024 00:54

General

  • Target

    8c8ff970b9534520171f97dba6bf582e2b1a33110bdae24412d322295ba5a28b.exe

  • Size

    558KB

  • MD5

    0853af43062bc1ebc6e577dcc06d698c

  • SHA1

    0ae55f26e328d7ae27b334d9e232fba337a7e06a

  • SHA256

    8c8ff970b9534520171f97dba6bf582e2b1a33110bdae24412d322295ba5a28b

  • SHA512

    f8f234f2fb189e7fe5dbebc08b23c1476d261a3c998459f436a4e69712a0c87b0bc442275cdd8359fec27c56e358336c0ef51bc1c6049eb64d11dbcf7941b90b

  • SSDEEP

    12288:RK777777777777N7vPLjIb2b6Gb9k/Yurwua412+J+Oz11Q6Gdu:RK777777777777lvzcb06QAY5uBL1Qc

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

23.105.131.228:1604

Mutex

2fc0dda4-46bf-46a1-9071-1400f4c43df4

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-09-21T09:35:25.099061636Z

  • 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

    1604

  • default_group

    CEOs

  • 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

    2fc0dda4-46bf-46a1-9071-1400f4c43df4

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    23.105.131.228

  • 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
  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 7 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 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 4 IoCs
  • Suspicious use of WriteProcessMemory 29 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8c8ff970b9534520171f97dba6bf582e2b1a33110bdae24412d322295ba5a28b.exe
    "C:\Users\Admin\AppData\Local\Temp\8c8ff970b9534520171f97dba6bf582e2b1a33110bdae24412d322295ba5a28b.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2380
    • 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\8c8ff970b9534520171f97dba6bf582e2b1a33110bdae24412d322295ba5a28b.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2188
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\umSJYhnmkJ.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2924
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\umSJYhnmkJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5754.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2808
    • C:\Users\Admin\AppData\Local\Temp\8c8ff970b9534520171f97dba6bf582e2b1a33110bdae24412d322295ba5a28b.exe
      "C:\Users\Admin\AppData\Local\Temp\8c8ff970b9534520171f97dba6bf582e2b1a33110bdae24412d322295ba5a28b.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:2700
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "WPA Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp5E85.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:1984
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "WPA Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp5F7F.tmp"
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:1040

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp5754.tmp

    Filesize

    1KB

    MD5

    d5e77bf7565fcc011afbbf4d6a18bc52

    SHA1

    f816111c1ab7970d9c858527a28ac96da55253be

    SHA256

    857f817b06ef805d91ac19643507f794bb6833f84c739bf7493a918786a708cb

    SHA512

    bd12220f5cf0e10f2bc3d08ad8183f49d0e69cdbc0f044c3caec7aae747df366542e28639bde05e0d06fe2301fffdaeed9939d8c2c13b563e4bd33fac31e23ff

  • C:\Users\Admin\AppData\Local\Temp\tmp5E85.tmp

    Filesize

    1KB

    MD5

    c9601783911a342b4ac5a0206963e75e

    SHA1

    c1727d06249987059b9f473494f35ee1a79a8e3c

    SHA256

    2699ad4a71e0bf2b040a223f34f82c75d9a70f6ac293724c763ffa7042e74cc6

    SHA512

    c6b00de6a1c4a736db20005d7d7bc9f4095a627a05dd980a432ee2adc46d469d376a6c35ea1ecfbe2f4b59a4d5eac0a3450716f0d63418bb1e0c9f6d4350ebd7

  • C:\Users\Admin\AppData\Local\Temp\tmp5F7F.tmp

    Filesize

    1KB

    MD5

    21de6c3a6440d917bdbb4b491191d9b2

    SHA1

    c63c300affe7147910dc4544d2d5f3029bf321a6

    SHA256

    23af17733a3882cdd82a5bbc321d896b2430dc1bb4b4ac034d129cde5027afc4

    SHA512

    dcd1c464ed36593b990e072940ab415804ef8076743015fff4939211e30e436beb7ce6af3072769abe0214f737cedb210d2b45e6e90da20dac54c3945b11575f

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

    Filesize

    7KB

    MD5

    b0c0c02bf7baca250f2faaa4e9130de9

    SHA1

    1a9f4b0e5169a818f18a4abcff930f167a6a8a79

    SHA256

    0267d1191b565885249bce9ee399cf555612c223dceb122bb9ec0cbd44fdce27

    SHA512

    9c5f0fce925a49acaaa74c27c72c678a4873da8095b02ee204bc5c1e29bfb1ece1c962dc8fd8c5481a9922eb848317ed6a77a0af2543895ca1ee1764f15414ca

  • memory/2380-31-0x00000000749F0000-0x00000000750DE000-memory.dmp

    Filesize

    6.9MB

  • memory/2380-1-0x00000000011D0000-0x0000000001262000-memory.dmp

    Filesize

    584KB

  • memory/2380-2-0x00000000749F0000-0x00000000750DE000-memory.dmp

    Filesize

    6.9MB

  • memory/2380-3-0x0000000000440000-0x000000000044E000-memory.dmp

    Filesize

    56KB

  • memory/2380-4-0x00000000749FE000-0x00000000749FF000-memory.dmp

    Filesize

    4KB

  • memory/2380-5-0x00000000749F0000-0x00000000750DE000-memory.dmp

    Filesize

    6.9MB

  • memory/2380-6-0x0000000005050000-0x00000000050BC000-memory.dmp

    Filesize

    432KB

  • memory/2380-0-0x00000000749FE000-0x00000000749FF000-memory.dmp

    Filesize

    4KB

  • memory/2700-30-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2700-27-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2700-25-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2700-21-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2700-19-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2700-28-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2700-29-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2700-23-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2700-39-0x0000000000450000-0x000000000045A000-memory.dmp

    Filesize

    40KB

  • memory/2700-40-0x0000000000460000-0x000000000047E000-memory.dmp

    Filesize

    120KB

  • memory/2700-41-0x00000000004C0000-0x00000000004CA000-memory.dmp

    Filesize

    40KB