General

  • Target

    PO 11325201021.xlsx

  • Size

    366KB

  • Sample

    211021-gys6mahhe9

  • MD5

    58fa68f503aff1559bf8e379d9416021

  • SHA1

    b876a7c9cc02e8f6eb38828b0d4744c1d38717dd

  • SHA256

    d3862440e576dbbf34598b8b9a36c5d81a97aa6f41bc6e8150658b1c82deda0c

  • SHA512

    43bcb44645ea05e19ef5d51eef47fe5edd2f563cfedc733aba940f2310725d79a22445e91a76958f8c856de6de4ba8eee00cb3aedf9dc7b4926703c0f47e50d3

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

newme122.3utilities.com:8822

newme1122.3utilities.com:8822

Mutex

dcf3fee6-c103-45ee-a2f0-f8afaa78d1fe

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    newme1122.3utilities.com

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-07-31T13:00:17.372768836Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    8822

  • default_group

    A New TIme Has Come

  • 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

    dcf3fee6-c103-45ee-a2f0-f8afaa78d1fe

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    newme122.3utilities.com

  • 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

Targets

    • Target

      PO 11325201021.xlsx

    • Size

      366KB

    • MD5

      58fa68f503aff1559bf8e379d9416021

    • SHA1

      b876a7c9cc02e8f6eb38828b0d4744c1d38717dd

    • SHA256

      d3862440e576dbbf34598b8b9a36c5d81a97aa6f41bc6e8150658b1c82deda0c

    • SHA512

      43bcb44645ea05e19ef5d51eef47fe5edd2f563cfedc733aba940f2310725d79a22445e91a76958f8c856de6de4ba8eee00cb3aedf9dc7b4926703c0f47e50d3

    • NanoCore

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

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • Nirsoft

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Loads dropped DLL

    • Uses the VBS compiler for execution

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Exploitation for Client Execution

1
T1203

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Scripting

1
T1064

Modify Registry

2
T1112

Discovery

System Information Discovery

4
T1082

Query Registry

2
T1012

Collection

Email Collection

1
T1114

Tasks