Analysis

  • max time kernel
    142s
  • max time network
    146s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-12-2024 15:40

General

  • Target

    04fd676dc283bde1035f4efe3fc3ae0daa0419b27155638d835f402fabb0845a.exe

  • Size

    416KB

  • MD5

    9a053bdd101822ef22da12f1599bc851

  • SHA1

    d15f7bce51bafba6b7b029a0820e15d0a7f60813

  • SHA256

    04fd676dc283bde1035f4efe3fc3ae0daa0419b27155638d835f402fabb0845a

  • SHA512

    d36fd6aee178185f5490822befbad3f7690daa2d321e789c07ab7c9cd7dc9c9bfcf6b62b9c862b95da1e4ac787de84e94e37acc27c3896f7a9dad3d44426ea4b

  • SSDEEP

    6144:ITNE3ZRrnaBVlvphVxmP+6CiejgcME1cwYfU+va+RU7P:ITNYrnE3bm/CiejewY5vg

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

[email protected]:46218

178.32.224.116:46218

Mutex

4af74541-e3f1-469c-8af7-efe4071b81cf

Attributes
  • activate_away_mode

    false

  • backup_connection_host

    178.32.224.116

  • backup_dns_server

  • buffer_size

    65535

  • build_time

    2018-07-28T12:59:38.488799236Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    false

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    46218

  • default_group

    tourex

  • 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

    4af74541-e3f1-469c-8af7-efe4071b81cf

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    [email protected]

  • primary_dns_server

  • 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
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\04fd676dc283bde1035f4efe3fc3ae0daa0419b27155638d835f402fabb0845a.exe
    "C:\Users\Admin\AppData\Local\Temp\04fd676dc283bde1035f4efe3fc3ae0daa0419b27155638d835f402fabb0845a.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4028
    • C:\Users\Admin\AppData\Roaming\c5e4gxfvd4v\ximo2ubzn1i.exe
      "C:\Users\Admin\AppData\Roaming\c5e4gxfvd4v\ximo2ubzn1i.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:544
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
        3⤵
        • Checks whether UAC is enabled
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:4312

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\c5e4gxfvd4v\ximo2ubzn1i.exe

    Filesize

    416KB

    MD5

    926d91ba718376bc13e15848c29bbb54

    SHA1

    442ff6fb8ca7d78c2d9ee97cf53c8dd3eafc7019

    SHA256

    f5a8c09d49153b3424f0cd5f9ab45cf2f4899746b39025a47043c3314f2cfaab

    SHA512

    cf6a494ed78533926085100b36798cd2d9160d39868a8f17f74140c43c62bc9753cd4faeb6944fec8ebe72c934265a463b6137c8def192ad6e58778a3c6d6625

  • memory/544-35-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

  • memory/544-33-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

  • memory/544-22-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

  • memory/544-20-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

  • memory/4028-5-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

  • memory/4028-6-0x0000000005BB0000-0x0000000005BEC000-memory.dmp

    Filesize

    240KB

  • memory/4028-0-0x0000000074E5E000-0x0000000074E5F000-memory.dmp

    Filesize

    4KB

  • memory/4028-4-0x0000000005620000-0x000000000562A000-memory.dmp

    Filesize

    40KB

  • memory/4028-21-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

  • memory/4028-3-0x0000000005660000-0x00000000056F2000-memory.dmp

    Filesize

    584KB

  • memory/4028-1-0x0000000000BA0000-0x0000000000C0E000-memory.dmp

    Filesize

    440KB

  • memory/4028-2-0x0000000005C10000-0x00000000061B4000-memory.dmp

    Filesize

    5.6MB

  • memory/4312-27-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB

  • memory/4312-23-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/4312-28-0x00000000052B0000-0x000000000534C000-memory.dmp

    Filesize

    624KB

  • memory/4312-30-0x00000000053E0000-0x00000000053EA000-memory.dmp

    Filesize

    40KB

  • memory/4312-31-0x00000000053F0000-0x000000000540E000-memory.dmp

    Filesize

    120KB

  • memory/4312-32-0x0000000005630000-0x000000000563A000-memory.dmp

    Filesize

    40KB

  • memory/4312-25-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/4312-24-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/4312-36-0x0000000074E50000-0x0000000075600000-memory.dmp

    Filesize

    7.7MB