General

  • Target

    af0b876a436452a6e998fc622493aaa4553bcc53864d66a6a6d5d476a85902eb_dump1.exe

  • Size

    483KB

  • Sample

    240724-q3jbnayemj

  • MD5

    87b596dacf0d6b3d57e6213d974ba376

  • SHA1

    71b89be1b7777072f51503d122449190b948df97

  • SHA256

    df6e2c62cf6413a030efeb9ae5e6288d77c4416332fbf05f461c83fa079dda49

  • SHA512

    5304f3de8bc18f937364cf11b894f12578ff2584d7f73c72fcb1764a922c215381030f07aef05e758e4a28fe8b6d72740abbc6e8419ed993d9355ad231e0460a

  • SSDEEP

    6144:PXIktXfM8Lv86r9uVWAa2je4Z5zl4hgDHQQs4NTQjoHFsAOZZ5AXIcNS5Gv:PX7tPMK8ctGe4Dzl4h2QnuPs/Z57cv

Malware Config

Extracted

Family

remcos

Botnet

NewRemoteHost

C2

newnex.3utilities.com:8580

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-68D53E

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Extracted

Family

nanocore

Version

1.2.2.0

C2

newsddawork.3utilities.com:1620

maxlogs.webhop.me:1620

Mutex

1fa46b72-10f9-4da3-bc15-84dde165706d

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    maxlogs.webhop.me

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2024-02-17T03:41:10.727034736Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1620

  • default_group

    NewBin

  • 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

    1fa46b72-10f9-4da3-bc15-84dde165706d

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    newsddawork.3utilities.com

  • 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

    1.2.2.0

  • wan_timeout

    8000

Targets

    • Target

      af0b876a436452a6e998fc622493aaa4553bcc53864d66a6a6d5d476a85902eb_dump1.exe

    • Size

      483KB

    • MD5

      87b596dacf0d6b3d57e6213d974ba376

    • SHA1

      71b89be1b7777072f51503d122449190b948df97

    • SHA256

      df6e2c62cf6413a030efeb9ae5e6288d77c4416332fbf05f461c83fa079dda49

    • SHA512

      5304f3de8bc18f937364cf11b894f12578ff2584d7f73c72fcb1764a922c215381030f07aef05e758e4a28fe8b6d72740abbc6e8419ed993d9355ad231e0460a

    • SSDEEP

      6144:PXIktXfM8Lv86r9uVWAa2je4Z5zl4hgDHQQs4NTQjoHFsAOZZ5AXIcNS5Gv:PX7tPMK8ctGe4Dzl4h2QnuPs/Z57cv

    • NanoCore

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

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks