Analysis

  • max time kernel
    118s
  • max time network
    27s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    15-08-2024 01:40

General

  • Target

    dfc22ad60a3e5c942e56e20a9b634aa0N.exe

  • Size

    281KB

  • MD5

    dfc22ad60a3e5c942e56e20a9b634aa0

  • SHA1

    24cba7c577b7083f4c403d041fe9ae3eae8e7ad5

  • SHA256

    ad519fbe45377b1ba91db0b8bf615a733950433ad6b913f6dda64e1b9f6fa9f8

  • SHA512

    86da6334ba54bd75250044bd498781f8ab8e0ff30321fc5905ca38f85ba5e2d6b57298d4d45ce553693ae0b9a864294dfc99acf0706eb4c398a54c1e415e5f77

  • SSDEEP

    6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkfv:boSeGUA5YZazpXUmZhZ6Si

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\dfc22ad60a3e5c942e56e20a9b634aa0N.exe
    "C:\Users\Admin\AppData\Local\Temp\dfc22ad60a3e5c942e56e20a9b634aa0N.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2252
    • 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:2768
      • 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:2448

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    281KB

    MD5

    1fa19948812447d0ebfc6ee1ba472e84

    SHA1

    75370d75f473db15d32169e7828f9e7478a182f6

    SHA256

    9a08e0a0a4c17562129e5731c7c2e25360f9613b775f5fbc444a2564ce509462

    SHA512

    4c976b7b2db8a44422300e03d21185ac2e0b01f929cdb68ee33926898caf97630e30e3d2fb89becf0f4b2cd320f899d4a9db1c964b6c4df9f734f6134ab8de36

  • memory/2252-12-0x00000000748E0000-0x0000000074E8B000-memory.dmp

    Filesize

    5.7MB

  • memory/2252-1-0x00000000748E0000-0x0000000074E8B000-memory.dmp

    Filesize

    5.7MB

  • memory/2252-2-0x00000000748E0000-0x0000000074E8B000-memory.dmp

    Filesize

    5.7MB

  • memory/2252-3-0x00000000748E0000-0x0000000074E8B000-memory.dmp

    Filesize

    5.7MB

  • memory/2252-0-0x00000000748E1000-0x00000000748E2000-memory.dmp

    Filesize

    4KB

  • memory/2448-16-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2448-25-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2448-32-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2448-30-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2448-24-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2448-22-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2448-20-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2448-18-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2768-14-0x00000000748E0000-0x0000000074E8B000-memory.dmp

    Filesize

    5.7MB

  • memory/2768-13-0x00000000748E0000-0x0000000074E8B000-memory.dmp

    Filesize

    5.7MB

  • memory/2768-34-0x00000000748E0000-0x0000000074E8B000-memory.dmp

    Filesize

    5.7MB

  • memory/2768-35-0x00000000748E0000-0x0000000074E8B000-memory.dmp

    Filesize

    5.7MB