Analysis

  • max time kernel
    156s
  • max time network
    184s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21-10-2022 18:55

General

  • Target

    34b29da15099686b06efea5d8c9c5dc82afaaa346c63354df6fb3b6377f21461.exe

  • Size

    569KB

  • MD5

    71d4a646c0eb434d761da6bff2a4d360

  • SHA1

    9dbdf620044a47a866af63197c11e749c067f885

  • SHA256

    34b29da15099686b06efea5d8c9c5dc82afaaa346c63354df6fb3b6377f21461

  • SHA512

    561e229d88112adecaec76547740d6f197acb9ab262e7dcc4a365e91c9d5e21adb667a848f7f07b67fc5cbb782d589fd674783ddd335cfbcc5f504de79537d6e

  • SSDEEP

    12288:qRdbPfBY82sEUutQAectXLYXozBUQIP4dSP6ZCwJnwrwFIQ:E5vYUwQAecYozB0A5nwrj

Malware Config

Extracted

Family

nanocore

Version

1.2.2.2

C2

Dres199.ddns.net:59

Mutex

31a52d57-b280-4dc8-8582-23d97140cbb3

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2015-05-21T16:00:55.188929836Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    59

  • default_group

    Default

  • 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

    31a52d57-b280-4dc8-8582-23d97140cbb3

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    Dres199.ddns.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

    1.2.2.2

  • wan_timeout

    8000

Signatures

  • NanoCore

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious use of UnmapMainImage 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\34b29da15099686b06efea5d8c9c5dc82afaaa346c63354df6fb3b6377f21461.exe
    "C:\Users\Admin\AppData\Local\Temp\34b29da15099686b06efea5d8c9c5dc82afaaa346c63354df6fb3b6377f21461.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4348
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Update\Chrome" /XML "C:\Users\Admin\AppData\Local\Temp\a_____.xml"
      2⤵
      • Creates scheduled task(s)
      PID:5076
    • C:\Users\Admin\AppData\Local\Temp\34b29da15099686b06efea5d8c9c5dc82afaaa346c63354df6fb3b6377f21461.exe
      "C:\Users\Admin\AppData\Local\Temp\34b29da15099686b06efea5d8c9c5dc82afaaa346c63354df6fb3b6377f21461.exe"
      2⤵
      • Suspicious use of UnmapMainImage
      PID:8
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 8 -s 12
        3⤵
        • Program crash
        PID:3484
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 8 -ip 8
    1⤵
      PID:3568

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\a_____.xml

      Filesize

      1KB

      MD5

      b1e90ac848a31875b555f0c311cb4321

      SHA1

      76027ae14879f528f7d0dec52c4f091d4cc593ee

      SHA256

      69b3091073e5b576b56801ed096fce3a758a44976cd67cb0887e274cf154a08a

      SHA512

      b8244c1f557a6bb336afe61fd845526c63deb3e307c683589a5c1d4cfed2a95f72a3e4439878b0910ccbebb2618ab13052982affec61d255c77ca69c4a40610f

    • memory/8-136-0x0000000000000000-mapping.dmp

    • memory/8-137-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/8-138-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/8-139-0x0000000000400000-0x0000000000438000-memory.dmp

      Filesize

      224KB

    • memory/4348-132-0x0000000074C60000-0x0000000075211000-memory.dmp

      Filesize

      5.7MB

    • memory/4348-133-0x0000000074C60000-0x0000000075211000-memory.dmp

      Filesize

      5.7MB

    • memory/4348-141-0x0000000074C60000-0x0000000075211000-memory.dmp

      Filesize

      5.7MB

    • memory/5076-134-0x0000000000000000-mapping.dmp