Analysis

  • max time kernel
    144s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231130-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/12/2023, 01:31

General

  • Target

    340afda65e77e299379392aa25dd7dd040d1a87e51f2249547d083a1d85641df.exe

  • Size

    595KB

  • MD5

    0c9f292df5bb12a2384a0fd2d62a363c

  • SHA1

    ccc4c864a64a4a1945eef4d36a1b3ce208173880

  • SHA256

    340afda65e77e299379392aa25dd7dd040d1a87e51f2249547d083a1d85641df

  • SHA512

    9cde74dc3cf0ffd48639f977cbde0caf9b7917431409a181567842760db425b515819961f3912ea9495f8f7c45d999026da50017333e1db9f70f8b6ee2b7a873

  • SSDEEP

    12288:I45+po2sccCAQVStw6wYyBeMSIUJwS+RTbfl+RRiXp2kxtK9Wd:L+pJsbCmyp0JwSjRxkxtK9u

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

btldinc7.sytes.net:4510

127.0.0.1:4510

Mutex

8dca47d1-e2ac-4cf4-9dae-489155036caa

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2023-09-14T23:25:11.588272936Z

  • 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

    4510

  • default_group

    btld

  • 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

    8dca47d1-e2ac-4cf4-9dae-489155036caa

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    btldinc7.sytes.net

  • 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.

  • 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
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\340afda65e77e299379392aa25dd7dd040d1a87e51f2249547d083a1d85641df.exe
    "C:\Users\Admin\AppData\Local\Temp\340afda65e77e299379392aa25dd7dd040d1a87e51f2249547d083a1d85641df.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4432
    • C:\Users\Admin\AppData\Local\Temp\340afda65e77e299379392aa25dd7dd040d1a87e51f2249547d083a1d85641df.exe
      "C:\Users\Admin\AppData\Local\Temp\340afda65e77e299379392aa25dd7dd040d1a87e51f2249547d083a1d85641df.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:1200
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "NAT Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp85AB.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:692
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "NAT Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8609.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:5016

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\340afda65e77e299379392aa25dd7dd040d1a87e51f2249547d083a1d85641df.exe.log

          Filesize

          2KB

          MD5

          93d52c1bc7c38d958583ebbd3dc09cd4

          SHA1

          4c5ee6f9c9ae190c9a0cccb91fa2257ddcb8b0d5

          SHA256

          2905f3a06dd8907ddbcbe64389cffcc8a5273d1822e25f8bea385bdd01653c76

          SHA512

          dfc55c3247d7734c5a531fb5a3de689e8bb823e82c14ad6cab16923d50d51e03e5e86165a7d65b3059a66b67968b611368b010a6d9f755916b01ef7b67c5228e

        • C:\Users\Admin\AppData\Local\Temp\tmp85AB.tmp

          Filesize

          1KB

          MD5

          03f5b9ec9db6068a5562292b3012ed49

          SHA1

          304033e8fde3f437b9a0a2c60671574f042e8799

          SHA256

          8422cf40de0753ca59d6a62f065b5b53b48602577db47da313ae28f6c783f37d

          SHA512

          c0fc6adfe0a354677d1e5d91b466b3a6dbd2d912deb49a0707bc9d41e3915953701877a20a8a9da3a0655eec57ee98a5430817ec51af706706232cda543b13f0

        • C:\Users\Admin\AppData\Local\Temp\tmp8609.tmp

          Filesize

          1KB

          MD5

          cd8e69b89899eb65a199cc8019e502ad

          SHA1

          19ae04c02d02e2828e4513de66734c383660d1a5

          SHA256

          cf1a9b78745b0f788fea2f579f1e3a82efc7425edb1f35abb8dd8e1cbaaf03ef

          SHA512

          9a2bf35fc687ec6ac81ad3fe16f82f104ad880be6b36afc7297264de09d50e85d9d3376ed9378d56b08ef94ca700b886cc40768587fc623c7fb6117265bd7033

        • memory/1200-11-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/1200-28-0x0000000005300000-0x0000000005310000-memory.dmp

          Filesize

          64KB

        • memory/1200-27-0x0000000074610000-0x0000000074DC0000-memory.dmp

          Filesize

          7.7MB

        • memory/1200-26-0x0000000005520000-0x000000000552A000-memory.dmp

          Filesize

          40KB

        • memory/1200-25-0x00000000052E0000-0x00000000052FE000-memory.dmp

          Filesize

          120KB

        • memory/1200-24-0x00000000051A0000-0x00000000051AA000-memory.dmp

          Filesize

          40KB

        • memory/1200-16-0x0000000005300000-0x0000000005310000-memory.dmp

          Filesize

          64KB

        • memory/1200-14-0x0000000074610000-0x0000000074DC0000-memory.dmp

          Filesize

          7.7MB

        • memory/4432-5-0x00000000054A0000-0x00000000054AA000-memory.dmp

          Filesize

          40KB

        • memory/4432-10-0x0000000006290000-0x000000000632C000-memory.dmp

          Filesize

          624KB

        • memory/4432-9-0x0000000006560000-0x00000000065D2000-memory.dmp

          Filesize

          456KB

        • memory/4432-15-0x0000000074610000-0x0000000074DC0000-memory.dmp

          Filesize

          7.7MB

        • memory/4432-8-0x0000000005500000-0x000000000550A000-memory.dmp

          Filesize

          40KB

        • memory/4432-7-0x00000000054F0000-0x00000000054F8000-memory.dmp

          Filesize

          32KB

        • memory/4432-6-0x00000000054B0000-0x00000000054C8000-memory.dmp

          Filesize

          96KB

        • memory/4432-0-0x0000000000440000-0x00000000004DA000-memory.dmp

          Filesize

          616KB

        • memory/4432-4-0x0000000005080000-0x0000000005112000-memory.dmp

          Filesize

          584KB

        • memory/4432-3-0x0000000005540000-0x0000000005AE4000-memory.dmp

          Filesize

          5.6MB

        • memory/4432-2-0x0000000002880000-0x0000000002890000-memory.dmp

          Filesize

          64KB

        • memory/4432-1-0x0000000074610000-0x0000000074DC0000-memory.dmp

          Filesize

          7.7MB