Analysis

  • max time kernel
    91s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-10-2022 14:37

General

  • Target

    Falcon 900EX Specification-Jets Sped.xlsx.exe

  • Size

    979KB

  • MD5

    669f69ee089a30a91d8fd84f788d080d

  • SHA1

    89b4973a79484b6d970839820a1b53329af3e1af

  • SHA256

    97114df3b308c295d098c06672827ce256dbfd8925d765bc03fc3ed970877067

  • SHA512

    ee5e5c2174abf1465953de7d541ff4f3515ba016777cec761faf1a78359d47f7aa062c29c741ab8cb9ff9ae19759aef838164b17c190d36b8b72895698a916f6

  • SSDEEP

    12288:ULESzD6V2Zu20mKIxVmhS1FnJi7HSqKJaA8pHrIG307SsveZ:UCmLxVmhSznJWHFKJavcGk7Sl

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

rdns0.vipsms101.com:54991

vipsms101.com:54991

Mutex

4df1b292-dbd9-4a4e-9b0a-4b6514b259e2

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    vipsms101.com

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-07-26T12:39:22.095777136Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    54991

  • 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

    4df1b292-dbd9-4a4e-9b0a-4b6514b259e2

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    rdns0.vipsms101.com

  • primary_dns_server

    8.8.8.8

  • request_elevation

    true

  • restart_delay

    5000

  • run_delay

    0

  • run_on_startup

    false

  • 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.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Falcon 900EX Specification-Jets Sped.xlsx.exe
    "C:\Users\Admin\AppData\Local\Temp\Falcon 900EX Specification-Jets Sped.xlsx.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2536
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\PNpTcZmVBYnJa.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1636
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\PNpTcZmVBYnJa" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1B87.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3280
    • C:\Users\Admin\AppData\Local\Temp\Falcon 900EX Specification-Jets Sped.xlsx.exe
      "C:\Users\Admin\AppData\Local\Temp\Falcon 900EX Specification-Jets Sped.xlsx.exe"
      2⤵
      • Adds Run key to start application
      • Checks whether UAC is enabled
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:2100

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp1B87.tmp
    Filesize

    1KB

    MD5

    87b8cd4e76e73b3a514350d96491bc5a

    SHA1

    a6c30e7a09c9b7bc6390937ff016bb1263e40019

    SHA256

    0eeaf58e945fd427a1422f4364ff0bcc50ad70a7c8c5cc9a01e6c8f259cee1a8

    SHA512

    007757e4276a127a3b28f8bc2a7c951c86c085b343f96818cb9b6b721da2f4f04211380735626e5102e097d9206354a6b5c8f7166c62a0a1c4a411508ffe9b1a

  • memory/1636-150-0x0000000006D00000-0x0000000006D1E000-memory.dmp
    Filesize

    120KB

  • memory/1636-137-0x0000000000000000-mapping.dmp
  • memory/1636-145-0x0000000005A10000-0x0000000005A76000-memory.dmp
    Filesize

    408KB

  • memory/1636-157-0x0000000007D60000-0x0000000007D68000-memory.dmp
    Filesize

    32KB

  • memory/1636-146-0x0000000005AF0000-0x0000000005B56000-memory.dmp
    Filesize

    408KB

  • memory/1636-156-0x0000000007D80000-0x0000000007D9A000-memory.dmp
    Filesize

    104KB

  • memory/1636-139-0x0000000002DF0000-0x0000000002E26000-memory.dmp
    Filesize

    216KB

  • memory/1636-147-0x0000000006730000-0x000000000674E000-memory.dmp
    Filesize

    120KB

  • memory/1636-142-0x0000000005B60000-0x0000000006188000-memory.dmp
    Filesize

    6.2MB

  • memory/1636-155-0x0000000007C70000-0x0000000007C7E000-memory.dmp
    Filesize

    56KB

  • memory/1636-154-0x0000000007CC0000-0x0000000007D56000-memory.dmp
    Filesize

    600KB

  • memory/1636-144-0x0000000005770000-0x0000000005792000-memory.dmp
    Filesize

    136KB

  • memory/1636-153-0x0000000007AB0000-0x0000000007ABA000-memory.dmp
    Filesize

    40KB

  • memory/1636-152-0x0000000007A40000-0x0000000007A5A000-memory.dmp
    Filesize

    104KB

  • memory/1636-151-0x0000000008090000-0x000000000870A000-memory.dmp
    Filesize

    6.5MB

  • memory/1636-148-0x00000000076F0000-0x0000000007722000-memory.dmp
    Filesize

    200KB

  • memory/1636-149-0x0000000070500000-0x000000007054C000-memory.dmp
    Filesize

    304KB

  • memory/2100-141-0x0000000000000000-mapping.dmp
  • memory/2100-143-0x0000000000400000-0x0000000000438000-memory.dmp
    Filesize

    224KB

  • memory/2536-132-0x00000000002E0000-0x00000000003DA000-memory.dmp
    Filesize

    1000KB

  • memory/2536-133-0x0000000005400000-0x00000000059A4000-memory.dmp
    Filesize

    5.6MB

  • memory/2536-134-0x0000000004D80000-0x0000000004E12000-memory.dmp
    Filesize

    584KB

  • memory/2536-135-0x0000000004D70000-0x0000000004D7A000-memory.dmp
    Filesize

    40KB

  • memory/2536-136-0x0000000006FF0000-0x000000000708C000-memory.dmp
    Filesize

    624KB

  • memory/3280-138-0x0000000000000000-mapping.dmp