General

  • Target

    f6b61f6f257283d5994aec8ef9755d786fecfe124fd007bdf676a92bedd4efc5

  • Size

    288KB

  • Sample

    220520-2r5lasaher

  • MD5

    2055727ac677f7eeac46a7381cc8b426

  • SHA1

    5f91c228eb71f213d96b045d356119a9f9c3b6d2

  • SHA256

    f6b61f6f257283d5994aec8ef9755d786fecfe124fd007bdf676a92bedd4efc5

  • SHA512

    95308b909b4393ddded46bc66dfbdf62d547c4296cd6b1e165de58fe7f53d70ec74eabe3a32cc57531932a73eec24b7422c37618ca13afd207c20d53409f43f2

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

24thmatch2020.duckdns.org:5626

127.0.0.1:5626

Mutex

1d5c6dc1-3b0f-4759-9757-c47b26dc4c4d

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2020-04-05T07:10:58.206265736Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    5626

  • default_group

    24thMarch

  • 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

    1d5c6dc1-3b0f-4759-9757-c47b26dc4c4d

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    24thmatch2020.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

Targets

    • Target

      Folha de dados de cotação para nossa empresa doc.exe

    • Size

      353KB

    • MD5

      d2218723958925fa4f1db0e3c8fcd5ec

    • SHA1

      be24d6aa66b1e33b1d17fa749e76dad3a57ec0df

    • SHA256

      18d75d5ac1ab85ab35e56305bcda420a6afd91c431ff002d2ba4887cdfd6fb1e

    • SHA512

      133b83bd4109e0c1adf36c4f05753a2f2d74e11a8dc2cf8350e609f028caa791152055cd591a66ce2ac83f12ffd84abf0cab3d8627e9a7e802780f005a9f967f

    • NanoCore

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

    • Looks for VirtualBox Guest Additions in registry

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Discovery

Query Registry

5
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

4
T1082

Peripheral Device Discovery

1
T1120

Tasks