Analysis

  • max time kernel
    25s
  • max time network
    18s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    05-08-2024 06:33

General

  • Target

    klar_tool.exe

  • Size

    1.1MB

  • MD5

    8b287ffda69f507acdac2c895a56eeb4

  • SHA1

    2d9728e0f653b9b215fabaa200c9fb69a9f36941

  • SHA256

    1e31133a1333a697922f742d1a4c11ee8c20583bbdfd2f65030787a940a3e877

  • SHA512

    9f11fb480afad32b83d9f41428145323a0ec4c4386c862f7c5d4430b476a401f501fae8362bb5ffd7faac2ebf1a91dbe947936827ae7a69f230b7f2721784eb9

  • SSDEEP

    24576:OR1vUbXTELRyLAHghzrdbW2uIPW8OsohzW:ORubwAs+zbdoVW

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

209.133.197.66:54984

127.0.0.1:54984

Mutex

7313f8f6-0b13-40a2-b135-fd4080f896a6

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    127.0.0.1

  • backup_dns_server

    84.200.70.40

  • buffer_size

    65523

  • build_time

    2024-05-17T08:09:16.827915036Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    54984

  • default_group

    Default

  • enable_debug_mode

    false

  • gc_threshold

    1.048576e+07

  • keep_alive_timeout

    30000

  • keyboard_logging

    false

  • lan_timeout

    2524

  • max_packet_size

    1.048576e+07

  • mutex

    7313f8f6-0b13-40a2-b135-fd4080f896a6

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    209.133.197.66

  • primary_dns_server

    84.200.69.80

  • request_elevation

    false

  • 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

    7994

Signatures

Processes

  • C:\Users\Admin\AppData\Local\Temp\klar_tool.exe
    "C:\Users\Admin\AppData\Local\Temp\klar_tool.exe"
    1⤵
    • Checks whether UAC is enabled
    PID:3608

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3608-0-0x00007FF8BC563000-0x00007FF8BC564000-memory.dmp

    Filesize

    4KB

  • memory/3608-1-0x0000024C90F30000-0x0000024C90F92000-memory.dmp

    Filesize

    392KB

  • memory/3608-2-0x0000024C92B10000-0x0000024C92BA0000-memory.dmp

    Filesize

    576KB

  • memory/3608-4-0x00007FF8BC560000-0x00007FF8BCF4C000-memory.dmp

    Filesize

    9.9MB

  • memory/3608-5-0x00007FF8BC563000-0x00007FF8BC564000-memory.dmp

    Filesize

    4KB

  • memory/3608-6-0x00007FF8BC560000-0x00007FF8BCF4C000-memory.dmp

    Filesize

    9.9MB