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Analysis

  • max time kernel
    120s
  • max time network
    119s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/01/2025, 02:28

General

  • Target

    233a67525929cd83a9a12900ab8f4df715a18cdfb5e49be072037d9567da0d29N.exe

  • Size

    1.0MB

  • MD5

    0dc192defa78469b4e75d2f87de92170

  • SHA1

    c88d14392b632be526ce97c340b9fcad6dba9ac7

  • SHA256

    233a67525929cd83a9a12900ab8f4df715a18cdfb5e49be072037d9567da0d29

  • SHA512

    76c26cf37fb263b0b544acfcf8ecf193bd49d91a75ef34cdb4da9bc0bfff8979bd402c7c2c9b61fc3ad0dd1421ce7d720ecbe49e3fa73ed55c8efdd83b3f4fb2

  • SSDEEP

    24576:Jur9gkEPGcHHXYDYDa6naGhywpCjq7jUv7cF6kZ6YriDfZ49p50/z:Ur9gNGKXYD+naGEsBXUv66k8o4yp5wz

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

testwork.kozow.com:8906

Mutex

bd6fc7b5-d48b-4e23-98f7-784bd3ef305c

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    testwork.kozow.com

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2019-02-16T16:47:25.218235636Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    8906

  • default_group

    star

  • 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

    bd6fc7b5-d48b-4e23-98f7-784bd3ef305c

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    testwork.kozow.com

  • 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.

  • Nanocore family
  • Drops startup file 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • AutoIT Executable 12 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 13 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 64 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 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\233a67525929cd83a9a12900ab8f4df715a18cdfb5e49be072037d9567da0d29N.exe
    "C:\Users\Admin\AppData\Local\Temp\233a67525929cd83a9a12900ab8f4df715a18cdfb5e49be072037d9567da0d29N.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4860
    • C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
      2⤵
      • Checks whether UAC is enabled
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:1188

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/1188-19-0x0000000073862000-0x0000000073863000-memory.dmp

    Filesize

    4KB

  • memory/1188-21-0x0000000073860000-0x0000000073E11000-memory.dmp

    Filesize

    5.7MB

  • memory/1188-7-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1188-12-0x0000000073862000-0x0000000073863000-memory.dmp

    Filesize

    4KB

  • memory/1188-13-0x0000000073860000-0x0000000073E11000-memory.dmp

    Filesize

    5.7MB

  • memory/1188-20-0x0000000073860000-0x0000000073E11000-memory.dmp

    Filesize

    5.7MB

  • memory/1188-15-0x0000000073860000-0x0000000073E11000-memory.dmp

    Filesize

    5.7MB

  • memory/4860-14-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-24-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-17-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-0-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-6-0x0000000001D60000-0x0000000001D61000-memory.dmp

    Filesize

    4KB

  • memory/4860-22-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-23-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-18-0x0000000001D60000-0x0000000001D61000-memory.dmp

    Filesize

    4KB

  • memory/4860-25-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-26-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-27-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-28-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-29-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-30-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB

  • memory/4860-31-0x0000000000460000-0x0000000000611000-memory.dmp

    Filesize

    1.7MB