Analysis

  • max time kernel
    66s
  • max time network
    156s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    16/07/2020, 07:06

General

  • Target

    FedEx's AWB#5305323204643 (2).exe

  • Size

    504KB

  • MD5

    4b64df0df55645e1fda431e95191f770

  • SHA1

    545c5fc62283efdc09c1a2a8e62e43f9035c8b03

  • SHA256

    91ec8e2e85917775a7055500c887bf49371679f772bd917c69dfb2b628f4a680

  • SHA512

    989b3800256663be9b78c5317d6d360cb8b6274189b6ea1755db07bc28da7cc48763165d0a2e53d145bb966a7b34085ef4f9306a5758974d19b7eb77cdfa9787

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

185.244.30.139:2121

annapro55.ddns.net:2121

Mutex

912d38da-67db-490c-9c4c-4b7c843ca9fd

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    annapro55.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-03-27T00:27:31.421536436Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    2121

  • default_group

    NEW CLIENTS

  • 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

    912d38da-67db-490c-9c4c-4b7c843ca9fd

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    185.244.30.139

  • 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

  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • NanoCore

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

  • Suspicious use of WriteProcessMemory 13 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\FedEx's AWB#5305323204643 (2).exe
    "C:\Users\Admin\AppData\Local\Temp\FedEx's AWB#5305323204643 (2).exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    • Suspicious use of SetThreadContext
    PID:1032
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ImlNUiQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9EAE.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1440
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe
      "{path}"
      2⤵
      • Suspicious behavior: GetForegroundWindowSpam
      • Checks whether UAC is enabled
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious behavior: EnumeratesProcesses
      PID:868

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • memory/868-4-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/868-6-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB

        • memory/868-7-0x0000000000400000-0x0000000000438000-memory.dmp

          Filesize

          224KB