Analysis

  • max time kernel
    149s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    11-06-2024 04:55

General

  • Target

    f14c100118e71126b220181f23a6fea9d4f217845d18ea87becf0f40aa3fe115.exe

  • Size

    280KB

  • MD5

    6e0a773cfe3ced38e7ac87c3e36b03a7

  • SHA1

    7aad0f350f38fb5af772f07656932368fb017182

  • SHA256

    f14c100118e71126b220181f23a6fea9d4f217845d18ea87becf0f40aa3fe115

  • SHA512

    9f41d8271ce3f47b0bcf3193a059d9219bb71f5987efe8533a3b8aa3788e92eac568bb52ce7a7ff7a16123f640882603b78c00c76a78e66ef479c4b9d258d713

  • SSDEEP

    6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkf6:boSeGUA5YZazpXUmZhZ6SL

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).

  • Suspicious behavior: EnumeratesProcesses 2 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\f14c100118e71126b220181f23a6fea9d4f217845d18ea87becf0f40aa3fe115.exe
    "C:\Users\Admin\AppData\Local\Temp\f14c100118e71126b220181f23a6fea9d4f217845d18ea87becf0f40aa3fe115.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1608
    • 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
      • Suspicious use of WriteProcessMemory
      PID:2592
      • 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
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of AdjustPrivilegeToken
        PID:3000

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Discovery

System Information Discovery

2
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

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

    280KB

    MD5

    99c306d45d0d7bc9ccdb39fe79b0a521

    SHA1

    77b50ae3cbfbd10e3b90cc76e870e89512793a78

    SHA256

    f26d6c8b78158a132475a18718aa29cd8a11eca04d288bd4290126afee6143ed

    SHA512

    c099f779cc50d24100376c15906b5603fea8ca9b11e4b8143e098be85d7fef464436a693fb8c481df409a904dfea9e85ea564e2439469b48d48f2d84756ad7b1

  • memory/1608-0-0x0000000074A71000-0x0000000074A72000-memory.dmp
    Filesize

    4KB

  • memory/1608-1-0x0000000074A70000-0x000000007501B000-memory.dmp
    Filesize

    5.7MB

  • memory/1608-2-0x0000000074A70000-0x000000007501B000-memory.dmp
    Filesize

    5.7MB

  • memory/1608-3-0x0000000074A70000-0x000000007501B000-memory.dmp
    Filesize

    5.7MB

  • memory/1608-12-0x0000000074A70000-0x000000007501B000-memory.dmp
    Filesize

    5.7MB

  • memory/2592-15-0x0000000074A70000-0x000000007501B000-memory.dmp
    Filesize

    5.7MB

  • memory/2592-13-0x0000000074A70000-0x000000007501B000-memory.dmp
    Filesize

    5.7MB

  • memory/2592-14-0x0000000074A70000-0x000000007501B000-memory.dmp
    Filesize

    5.7MB

  • memory/2592-37-0x0000000074A70000-0x000000007501B000-memory.dmp
    Filesize

    5.7MB

  • memory/3000-17-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/3000-35-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/3000-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
    Filesize

    4KB

  • memory/3000-27-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/3000-24-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/3000-21-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/3000-19-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/3000-33-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB