Analysis

  • max time kernel
    142s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231127-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/12/2023, 06:55

General

  • Target

    cc0f6af0ea57fc9cb9698c534fbbe1b2.exe

  • Size

    780KB

  • MD5

    cc0f6af0ea57fc9cb9698c534fbbe1b2

  • SHA1

    4fd4acb6716bfb889f685045d00662fb3d46be78

  • SHA256

    6e4a05f7b769a8cb12f932281af71be353b058d68a3f96bd00a38b63e78bae70

  • SHA512

    eaf6132501ad4e9e213606afcc164c4dd8dca4a9a685d2411e23ff4b51ea1a4eddded73d2c953b633d1e92bd052789b6a41daae19a2654fa556392fa5904e4e3

  • SSDEEP

    12288:FW8tW8G34/uK45+po2op+9icdMJG0Bi3SQuFBASUFFJR92DGMAvWrQnTIRy8OJ/k:e34/up+pJzl50ySXASKCyTwecRy83

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 6 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\cc0f6af0ea57fc9cb9698c534fbbe1b2.exe
    "C:\Users\Admin\AppData\Local\Temp\cc0f6af0ea57fc9cb9698c534fbbe1b2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4472
    • C:\Users\Admin\AppData\Local\Temp\cc0f6af0ea57fc9cb9698c534fbbe1b2.exe
      "C:\Users\Admin\AppData\Local\Temp\cc0f6af0ea57fc9cb9698c534fbbe1b2.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:4768
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "NAS Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmpF1E2.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:4164
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "NAS Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpF28F.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:5072

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\cc0f6af0ea57fc9cb9698c534fbbe1b2.exe.log

          Filesize

          1KB

          MD5

          8ec831f3e3a3f77e4a7b9cd32b48384c

          SHA1

          d83f09fd87c5bd86e045873c231c14836e76a05c

          SHA256

          7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

          SHA512

          26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

        • C:\Users\Admin\AppData\Local\Temp\tmpF1E2.tmp

          Filesize

          1KB

          MD5

          fc7fbae2a7339f292629b47f7c191d91

          SHA1

          2572887548578a060a5eff284dac4e22db06f1d2

          SHA256

          27ad5fb53e16fc402a004b5b5ee6bd52a4acd38ef1f783c774e5bb8b182e429b

          SHA512

          8b67a94d58a006f58ec3274498fec1a3ea689890369ea47794163bb2d7f16bea7bbd7a1c83f01bf523b239c9153e64a7b857263d8c1e09c2618d6e49c7bf77e4

        • C:\Users\Admin\AppData\Local\Temp\tmpF28F.tmp

          Filesize

          1KB

          MD5

          9f554f602c22cfc20079e966d177fadb

          SHA1

          789baa3425849bf239e47c6bcf352e6693a8c337

          SHA256

          4c760d5fe0c06cf4bf554170870f41181c61a217c37eb826903094dda86dd1f1

          SHA512

          b83e3e97dbe38ec4c64d9bef65e2521416f2d7434d78d05e66f729a2e0fbfea3f9bc6f6c4abaf76555af89a9565dfc0853d99067be9042dd66ed6246696eecbb

        • memory/4472-6-0x0000000005CD0000-0x0000000005CE8000-memory.dmp

          Filesize

          96KB

        • memory/4472-4-0x00000000059D0000-0x00000000059E0000-memory.dmp

          Filesize

          64KB

        • memory/4472-5-0x00000000058E0000-0x00000000058EA000-memory.dmp

          Filesize

          40KB

        • memory/4472-3-0x0000000005830000-0x00000000058C2000-memory.dmp

          Filesize

          584KB

        • memory/4472-7-0x0000000006B20000-0x0000000006B28000-memory.dmp

          Filesize

          32KB

        • memory/4472-8-0x0000000006B30000-0x0000000006B3A000-memory.dmp

          Filesize

          40KB

        • memory/4472-9-0x0000000006DF0000-0x0000000006E62000-memory.dmp

          Filesize

          456KB

        • memory/4472-10-0x0000000006C00000-0x0000000006C9C000-memory.dmp

          Filesize

          624KB

        • memory/4472-1-0x0000000000D70000-0x0000000000E3A000-memory.dmp

          Filesize

          808KB

        • memory/4472-2-0x0000000005D00000-0x00000000062A4000-memory.dmp

          Filesize

          5.6MB

        • memory/4472-14-0x0000000074BC0000-0x0000000075370000-memory.dmp

          Filesize

          7.7MB

        • memory/4472-0-0x0000000074BC0000-0x0000000075370000-memory.dmp

          Filesize

          7.7MB

        • memory/4768-24-0x0000000005AF0000-0x0000000005AFA000-memory.dmp

          Filesize

          40KB

        • memory/4768-34-0x0000000007280000-0x000000000728C000-memory.dmp

          Filesize

          48KB

        • memory/4768-15-0x0000000074BC0000-0x0000000075370000-memory.dmp

          Filesize

          7.7MB

        • memory/4768-11-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/4768-25-0x0000000005E20000-0x0000000005E3E000-memory.dmp

          Filesize

          120KB

        • memory/4768-26-0x0000000006AB0000-0x0000000006ABA000-memory.dmp

          Filesize

          40KB

        • memory/4768-29-0x0000000007210000-0x0000000007222000-memory.dmp

          Filesize

          72KB

        • memory/4768-30-0x0000000007220000-0x000000000723A000-memory.dmp

          Filesize

          104KB

        • memory/4768-31-0x0000000007250000-0x000000000725E000-memory.dmp

          Filesize

          56KB

        • memory/4768-32-0x0000000007260000-0x0000000007272000-memory.dmp

          Filesize

          72KB

        • memory/4768-33-0x0000000007270000-0x000000000727E000-memory.dmp

          Filesize

          56KB

        • memory/4768-16-0x0000000005B10000-0x0000000005B20000-memory.dmp

          Filesize

          64KB

        • memory/4768-35-0x0000000007290000-0x00000000072A4000-memory.dmp

          Filesize

          80KB

        • memory/4768-36-0x00000000073E0000-0x00000000073F0000-memory.dmp

          Filesize

          64KB

        • memory/4768-37-0x0000000007400000-0x0000000007414000-memory.dmp

          Filesize

          80KB

        • memory/4768-38-0x0000000007420000-0x000000000742E000-memory.dmp

          Filesize

          56KB

        • memory/4768-39-0x0000000007430000-0x000000000745E000-memory.dmp

          Filesize

          184KB

        • memory/4768-40-0x0000000007460000-0x0000000007474000-memory.dmp

          Filesize

          80KB

        • memory/4768-41-0x0000000007520000-0x0000000007586000-memory.dmp

          Filesize

          408KB

        • memory/4768-43-0x0000000074BC0000-0x0000000075370000-memory.dmp

          Filesize

          7.7MB

        • memory/4768-44-0x0000000005B10000-0x0000000005B20000-memory.dmp

          Filesize

          64KB