Resubmissions

15-08-2024 11:42

240815-nt6pgsvcmj 7

15-08-2024 11:37

240815-nrkz1avbpj 10

15-08-2024 11:36

240815-nqyjpsvbmq 10

15-08-2024 11:33

240815-npbcsavbjm 10

Analysis

  • max time kernel
    149s
  • max time network
    138s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    15-08-2024 11:37

General

  • Target

    ae1265e9fe0ac39bbe970a3fa66c64b0N.exe

  • Size

    282KB

  • MD5

    ae1265e9fe0ac39bbe970a3fa66c64b0

  • SHA1

    9239a5d795a2d97e72e7bd9b48b125d0e2459960

  • SHA256

    87a574cbf6233e2fd7a3872da22451ae49f6248cca5c900dab49207e0f0135b0

  • SHA512

    ff66d820fd16cc06ee99b995b1de7aa22d545da35518a1b02c5d5dee6a2d6c8670d3c3ba6934c0f0ebeaadb577c9de91dd9db8f8b27d1636f4f7514a6b4430a5

  • SSDEEP

    6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkfQ:boSeGUA5YZazpXUmZhZ6Sp

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

sysupdate24.ddns.net:45400

Mutex

ae82ab7f-db07-49ee-9d2b-76075d76f37f

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

  • buffer_size

    65535

  • build_time

    2020-04-24T17:41:53.492468936Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    45400

  • default_group

    Default

  • 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

    ae82ab7f-db07-49ee-9d2b-76075d76f37f

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    sysupdate24.ddns.net

  • 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.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 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 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ae1265e9fe0ac39bbe970a3fa66c64b0N.exe
    "C:\Users\Admin\AppData\Local\Temp\ae1265e9fe0ac39bbe970a3fa66c64b0N.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2680
    • C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
      "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2760
      • C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
        "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
        3⤵
        • Executes dropped EXE
        • Checks whether UAC is enabled
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:784

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • \Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe

    Filesize

    282KB

    MD5

    85423174f78e73d2a8ead25cb88c9d41

    SHA1

    c9d33fb79558507f432d2c0b289749fc6f730543

    SHA256

    81fa0363a9099b04f3292ac387a35aec4ef7bf30ecbb055678fa450fbbefdb84

    SHA512

    1f06af461294696f7a11bf30b0a928838f797a00e6a98dec6da8120927647786e83c405d33b9aa8b65640127568ca0172b9682c9791d14d5c05d2597bbde1f58

  • memory/784-21-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/784-25-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/784-31-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/784-32-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/784-37-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/784-39-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/784-28-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/784-23-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2680-5-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2680-14-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2680-0-0x0000000074E91000-0x0000000074E92000-memory.dmp

    Filesize

    4KB

  • memory/2680-4-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2680-3-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2680-2-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2680-1-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2760-17-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2760-18-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2760-19-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2760-16-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2760-15-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB

  • memory/2760-41-0x0000000074E90000-0x000000007543B000-memory.dmp

    Filesize

    5.7MB