Analysis

  • max time kernel
    150s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-12-2024 18:37

General

  • Target

    LVtvY.txt.exe

  • Size

    568KB

  • MD5

    2f159c22c90f5cbddfdba3455f2aa94e

  • SHA1

    57c7fb9804ba3fa064fac0a78cb5cfeb7b9d10c2

  • SHA256

    988d2c306698b469a52c807a28fbd030868b108458ed2b72e6f776f2ed933703

  • SHA512

    af31a2f9a5c6f7ce08429a6047b1d3ac3362b302b4b684c91ea3057cd8e4c77eb2e70901d1e1269181999ffe76e85a3b182751ad369d212522f2e18acaf64bb4

  • SSDEEP

    12288:efll3msRDZti+FF2WoYX0FvSYHWQaHlgxbMypeUtTX:CjW0N3j2Q0FBxheUt

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

194.5.97.179:4488

Mutex

83652750-fccd-4151-ba31-011bfa7c440f

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-07-12T02:09:43.633412236Z

  • 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

    4488

  • default_group

    GOODS

  • 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

    83652750-fccd-4151-ba31-011bfa7c440f

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    194.5.97.179

  • 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

  • Formbook

    Formbook is a data stealing malware which is capable of stealing data.

  • Formbook family
  • NanoCore

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

  • Nanocore family
  • Formbook payload 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 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 9 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 61 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3436
    • C:\Users\Admin\AppData\Local\Temp\LVtvY.txt.exe
      "C:\Users\Admin\AppData\Local\Temp\LVtvY.txt.exe"
      2⤵
      • Checks computer location settings
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:1000
      • C:\Users\Admin\AppData\Roaming\Zlfac\Uulebo.exe
        "C:\Users\Admin\AppData\Roaming\Zlfac\Uulebo.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3012
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:536
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
          4⤵
            PID:4288
          • C:\Users\Admin\AppData\Roaming\bin.exe
            "C:\Users\Admin\AppData\Roaming\bin.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of AdjustPrivilegeToken
            PID:4088
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
            4⤵
            • 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:4220
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks.exe" /create /f /tn "DHCP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6CAF.tmp"
              5⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:4448
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks.exe" /create /f /tn "DHCP Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp6D5C.tmp"
              5⤵
              • System Location Discovery: System Language Discovery
              • Scheduled Task/Job: Scheduled Task
              PID:1696
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\SysWOW64\cmd.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:3188
        • C:\Windows\SysWOW64\cmd.exe
          /c del "C:\Users\Admin\AppData\Roaming\bin.exe"
          3⤵
          • System Location Discovery: System Language Discovery
          PID:1536

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmp6CAF.tmp

      Filesize

      1KB

      MD5

      9f7ed98e81d0fe949e838d96a3082d9d

      SHA1

      51f2641ef388b4d7124299a8fe67dd28b97d7c2b

      SHA256

      c8e060a2fe9fbb9ab914cff8c292fedb3d6181626765216168fbe6894ad2f76d

      SHA512

      3d3333b5cc5acef6d5ec8add76be23c028c167c09e50310f2972380871c730541d6500249f6d1b140b1e2c962d22b5c8d5a1ed034ef9f856b2dd1d73107dabcc

    • C:\Users\Admin\AppData\Local\Temp\tmp6D5C.tmp

      Filesize

      1KB

      MD5

      0479d5f304ef2d7e3c15fb24a99f88c1

      SHA1

      8edbb1450a656fac5f5e96779ffe440ee8c1aec9

      SHA256

      112557c2b2d0c669a3b115129dc32f005341e965330fa8f2ad3e5de1926594bc

      SHA512

      537e8d87e5cd975f0e69bb145f81d6e9d7b0d82eed143ac351304ea38577137386a51fdb7357ec6d641eb04ff5f51e249bba2db8a4b5bf2934d561394a4a3f15

    • C:\Users\Admin\AppData\Roaming\Zlfac\Uulebo.exe

      Filesize

      568KB

      MD5

      2f159c22c90f5cbddfdba3455f2aa94e

      SHA1

      57c7fb9804ba3fa064fac0a78cb5cfeb7b9d10c2

      SHA256

      988d2c306698b469a52c807a28fbd030868b108458ed2b72e6f776f2ed933703

      SHA512

      af31a2f9a5c6f7ce08429a6047b1d3ac3362b302b4b684c91ea3057cd8e4c77eb2e70901d1e1269181999ffe76e85a3b182751ad369d212522f2e18acaf64bb4

    • C:\Users\Admin\AppData\Roaming\Zlfac\vogitq.url

      Filesize

      168B

      MD5

      0e0e06be7802dc0532e72c3a39eedcf1

      SHA1

      e144f3d45ef0b7f6ba8fc5f5a39995a38a1d08ed

      SHA256

      a835dd3f043f4e9b0a599051d7aa76766fec85e5a9dc7a861bb4ec298f52776f

      SHA512

      bef9054f899c022d63b8ea2ea1a3df60cf2e6ced45d95576aa92334a980df7c6e9b81c2aa9d79f86a50a0189b806928cef9d867f2d24a7f6895e09a844a12ad7

    • C:\Users\Admin\AppData\Roaming\bin.exe

      Filesize

      179KB

      MD5

      f67b3e1d9001156166a3582389d86665

      SHA1

      73314346401736dde611eca255d20e18d6eae31c

      SHA256

      d58395192addd2168a59f5a907593453de48b79f180b98cad4748bb3df6c8aa3

      SHA512

      127690b3626582a07592155c617b8271ee1c1ea8a3e81fe56be3dc604b03e91cb310de7cea71c6ce2b062c84591294f529c06b5c58492fd815cae1fe5486112a

    • memory/536-30-0x0000000005210000-0x000000000521A000-memory.dmp

      Filesize

      40KB

    • memory/536-29-0x0000000000400000-0x0000000000412000-memory.dmp

      Filesize

      72KB

    • memory/1000-8-0x00000000746C0000-0x0000000074E70000-memory.dmp

      Filesize

      7.7MB

    • memory/1000-7-0x00000000746CE000-0x00000000746CF000-memory.dmp

      Filesize

      4KB

    • memory/1000-9-0x0000000006C20000-0x0000000006C56000-memory.dmp

      Filesize

      216KB

    • memory/1000-6-0x0000000005C20000-0x0000000005C2A000-memory.dmp

      Filesize

      40KB

    • memory/1000-5-0x0000000005900000-0x000000000590A000-memory.dmp

      Filesize

      40KB

    • memory/1000-22-0x00000000746C0000-0x0000000074E70000-memory.dmp

      Filesize

      7.7MB

    • memory/1000-4-0x00000000746C0000-0x0000000074E70000-memory.dmp

      Filesize

      7.7MB

    • memory/1000-0-0x00000000746CE000-0x00000000746CF000-memory.dmp

      Filesize

      4KB

    • memory/1000-3-0x0000000005760000-0x00000000057F2000-memory.dmp

      Filesize

      584KB

    • memory/1000-2-0x0000000005C30000-0x00000000061D4000-memory.dmp

      Filesize

      5.6MB

    • memory/1000-1-0x0000000000CC0000-0x0000000000D54000-memory.dmp

      Filesize

      592KB

    • memory/3012-25-0x00000000746C0000-0x0000000074E70000-memory.dmp

      Filesize

      7.7MB

    • memory/3012-26-0x00000000746C0000-0x0000000074E70000-memory.dmp

      Filesize

      7.7MB

    • memory/3012-24-0x00000000746C0000-0x0000000074E70000-memory.dmp

      Filesize

      7.7MB

    • memory/3012-23-0x00000000746C0000-0x0000000074E70000-memory.dmp

      Filesize

      7.7MB

    • memory/3188-40-0x0000000000AC0000-0x0000000000B1A000-memory.dmp

      Filesize

      360KB

    • memory/3188-41-0x0000000000AC0000-0x0000000000B1A000-memory.dmp

      Filesize

      360KB

    • memory/3436-56-0x0000000002770000-0x0000000002854000-memory.dmp

      Filesize

      912KB

    • memory/4220-43-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/4220-44-0x00000000058B0000-0x000000000594C000-memory.dmp

      Filesize

      624KB

    • memory/4220-52-0x00000000058A0000-0x00000000058AA000-memory.dmp

      Filesize

      40KB

    • memory/4220-53-0x00000000068E0000-0x00000000068FE000-memory.dmp

      Filesize

      120KB

    • memory/4220-54-0x0000000006B00000-0x0000000006B0A000-memory.dmp

      Filesize

      40KB