Analysis

  • max time kernel
    157s
  • max time network
    165s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    11-10-2021 20:16

General

  • Target

    shipping documents.pdf.exe

  • Size

    620KB

  • MD5

    d6d4e3068736e41cc62527b1328817a2

  • SHA1

    c7b2a7afcd3f5bb62c084ae0f08852564a79519d

  • SHA256

    28e7aedaf2800e319f630be9607b160a327e229a2c96eedf55d5637a77836e74

  • SHA512

    4e17768f97103c78e177fc6fbba395ffa09595e54bdf17dba19455862d48eb21fdecbcf099992d3e0c0eec4a84779f236ff75e5370b3ecadd8efad5613f5937f

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

23.105.131.206:4040

Mutex

336f8da1-0f3e-48f8-851d-a56c179e533d

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-07-12T14:00:59.313360036Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    4040

  • default_group

    boss

  • 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

    336f8da1-0f3e-48f8-851d-a56c179e533d

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    23.105.131.206

  • 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.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\shipping documents.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\shipping documents.pdf.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3708
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\dKiNuzOQZrZEYD" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6ED3.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4052
    • C:\Users\Admin\AppData\Local\Temp\shipping documents.pdf.exe
      "C:\Users\Admin\AppData\Local\Temp\shipping documents.pdf.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:3908

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3708-122-0x0000000006F10000-0x0000000006F11000-memory.dmp

    Filesize

    4KB

  • memory/3708-115-0x00000000002C0000-0x00000000002C1000-memory.dmp

    Filesize

    4KB

  • memory/3708-118-0x0000000004BB0000-0x0000000004BB1000-memory.dmp

    Filesize

    4KB

  • memory/3708-119-0x0000000004B90000-0x0000000004B91000-memory.dmp

    Filesize

    4KB

  • memory/3708-120-0x0000000004AF0000-0x0000000004B82000-memory.dmp

    Filesize

    584KB

  • memory/3708-121-0x00000000065B0000-0x00000000065C1000-memory.dmp

    Filesize

    68KB

  • memory/3708-117-0x00000000050B0000-0x00000000050B1000-memory.dmp

    Filesize

    4KB

  • memory/3708-123-0x0000000007110000-0x0000000007164000-memory.dmp

    Filesize

    336KB

  • memory/3908-126-0x000000000041E792-mapping.dmp

  • memory/3908-125-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/3908-133-0x0000000004EB0000-0x0000000004EB5000-memory.dmp

    Filesize

    20KB

  • memory/3908-134-0x0000000005250000-0x0000000005269000-memory.dmp

    Filesize

    100KB

  • memory/3908-135-0x00000000050B0000-0x00000000050B3000-memory.dmp

    Filesize

    12KB

  • memory/3908-136-0x0000000004CD0000-0x0000000004D62000-memory.dmp

    Filesize

    584KB

  • memory/4052-124-0x0000000000000000-mapping.dmp