Analysis

  • max time kernel
    151s
  • max time network
    178s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    12-10-2021 08:22

General

  • Target

    INVOICE.exe

  • Size

    1.3MB

  • MD5

    088793d72583239cf48bc2cc6cd4e188

  • SHA1

    a9c2abf03fd18407ec41030266dc5912fe5423e4

  • SHA256

    9accd263b79d26b6791096b9b5e6f7b0c9d16c0648648301c59bab32ada1071d

  • SHA512

    3e79b55722a912e04209be3b2c1f7319b88cd3a33d092073b32bafe20ed43887f251a3ad3c5a814d500ddd0871b83025bc7c8c453d224cb60360061fe5382744

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

172.111.250.107:51000

apaduckdns.duckdns.org:51000

Mutex

599952d4-aed1-4828-a423-c4bf438e7e18

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    apaduckdns.duckdns.org

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2019-09-12T02:24:33.575087936Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    51000

  • default_group

    GREENFIELD

  • 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

    599952d4-aed1-4828-a423-c4bf438e7e18

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    172.111.250.107

  • 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

Signatures

  • NanoCore

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\INVOICE.exe
    "C:\Users\Admin\AppData\Local\Temp\INVOICE.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1832
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegSvcs.exe
      "C:\\\\Windows\\\\Microsoft.NET\\\\Framework\\\\v2.0.50727\\\\RegSvcs.exe"
      2⤵
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:1496

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1496-63-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1496-64-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1496-69-0x000000000041E792-mapping.dmp

  • memory/1496-70-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1496-71-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1496-73-0x0000000002070000-0x0000000002071000-memory.dmp

    Filesize

    4KB

  • memory/1496-74-0x0000000002071000-0x0000000002072000-memory.dmp

    Filesize

    4KB

  • memory/1496-75-0x0000000002076000-0x0000000002087000-memory.dmp

    Filesize

    68KB

  • memory/1832-60-0x0000000075801000-0x0000000075803000-memory.dmp

    Filesize

    8KB

  • memory/1832-61-0x0000000000F30000-0x0000000000F63000-memory.dmp

    Filesize

    204KB

  • memory/1832-62-0x0000000000160000-0x0000000000161000-memory.dmp

    Filesize

    4KB