Analysis

  • max time kernel
    136s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    09-07-2020 08:39

General

  • Target

    FedEx's AWB#5305323204643 .exe

  • Size

    488KB

  • MD5

    b315e1e72c6bda7a63b5342bc0eb46bc

  • SHA1

    34032b5c39ad3d19a975776d3f872c4378c5d2a5

  • SHA256

    ed1640ac6b131e600ada39bbd4453cabaea4375bd1308ff07bcf6630d6b38daa

  • SHA512

    3323c52b390c3e252c1d44f6ae06a53a0295ec3fb03f80351854139f334cd75b5aa66e591063ddd17e8fb481bd95187f0335a2334befd1c259c017a9a64907e7

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

  • NanoCore

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

  • 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
  • Suspicious use of WriteProcessMemory 13 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\FedEx's AWB#5305323204643 .exe
    "C:\Users\Admin\AppData\Local\Temp\FedEx's AWB#5305323204643 .exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    • Suspicious use of SetThreadContext
    PID:112
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\XKwGubFZYwl" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA4E5.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1096
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
      "{path}"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      PID:1512

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/1512-2-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1512-5-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1512-4-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB