Analysis

  • max time kernel
    66s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    26-11-2020 06:40

General

  • Target

    Receipt#502.exe

  • Size

    680KB

  • MD5

    e2e26573196fd444c8845d29e73a6b00

  • SHA1

    8a2fc9e82c11d234e74846451b12c73d69dea955

  • SHA256

    40fe69be55041a8607bf2596d0fa649ab26f6d6bd6973fb955f14f4e8a066b6c

  • SHA512

    02906faffe3bb49e0a936f5d07215ffe8b7cc28b2f65536e17b1b6204aa7966998b4a70bb09bf5a1fdfaa6efef6f729fbeabb1a2e3c540cd1965f73edabc8b78

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

without.duckdns.org:2078

Mutex

17fd7e7e-3990-4c53-9987-94767303fd64

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    without.duckdns.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-09-03T20:18:47.158112236Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    2078

  • default_group

    without

  • 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

    17fd7e7e-3990-4c53-9987-94767303fd64

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    without.duckdns.org

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    true

  • 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.

  • Suspicious use of SetThreadContext 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 behavior: EnumeratesProcesses 7 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Receipt#502.exe
    "C:\Users\Admin\AppData\Local\Temp\Receipt#502.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4756
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NeKPJNb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp3384.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:2796
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
      "{path}"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:568

Network

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp3384.tmp
    MD5

    e887b7d304b7d57eaf3c07086dbd102f

    SHA1

    2758ce37d82e2ddf2a662b96175ff5babf7d9b51

    SHA256

    18a376a5a0775c1bec582a0f0d5ca3393912e678413b9a8319d75a3530018df7

    SHA512

    ebec00a5f6105b1ec8376129fc5c6488b4d7b4c510f5e72bc2c99da94be1eb924b02d91ab85601ac87d49c390263d5b31d046630b89ee16cfa72f0d825821fdc

  • memory/568-2-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/568-3-0x000000000041E792-mapping.dmp
  • memory/2796-0-0x0000000000000000-mapping.dmp