Analysis

  • max time kernel
    101s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    24-10-2022 03:26

General

  • Target

    HEALTHCARE PO 00134536OCT2422.exe

  • Size

    816KB

  • MD5

    09b2235e9a54194838d29a8e92d3d120

  • SHA1

    93d2d74e32e4995f30e038287c5d229264c837fc

  • SHA256

    74bf4be5cd674b82ed1eee10d1187d16b8abd1c348d2527d8ff34d88fbc01114

  • SHA512

    676fdc32a922ee410d34c1fa65c17bd5584c82b4e2d7d9e315115a592a4d8a2e8ad3472452dc5916159ecaa7223d28595b648145e5c6a8f481e95132fc8b4e22

  • SSDEEP

    6144:l7BRdX63JgEWqAi2iu8ifmZzBa34IDz3Dv+Xr3Di0OlqMuyP2X7+tCfUktC0w5T3:zX6Zglqk7WYPfLYr5GeL+kfRX4nYY9

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

198.50.231.134:5498

Mutex

9b971056-14d1-4d11-993c-89c2085bbd7c

Attributes
  • activate_away_mode

    true

  • backup_connection_host

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-07-01T11:22:25.531243736Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    true

  • connect_delay

    4000

  • connection_port

    5498

  • default_group

    miracle

  • 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

    9b971056-14d1-4d11-993c-89c2085bbd7c

  • mutex_timeout

    5000

  • prevent_system_sleep

    true

  • primary_connection_host

    198.50.231.134

  • primary_dns_server

    8.8.8.8

  • 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.

  • 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). 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 11 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\HEALTHCARE PO 00134536OCT2422.exe
    "C:\Users\Admin\AppData\Local\Temp\HEALTHCARE PO 00134536OCT2422.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1964
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ESrTlJCU.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1700
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ESrTlJCU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCE77.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1320
    • C:\Users\Admin\AppData\Local\Temp\HEALTHCARE PO 00134536OCT2422.exe
      "C:\Users\Admin\AppData\Local\Temp\HEALTHCARE PO 00134536OCT2422.exe"
      2⤵
      • Checks whether UAC is enabled
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      PID:1768

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpCE77.tmp

    Filesize

    1KB

    MD5

    b0b190b1f56535b848c00bc26b9a7d4c

    SHA1

    a7d726dbfe3aa9d40bc3e9ecb81d608ffca46267

    SHA256

    12f29cc70fc19b6d71e28cd8184a6b12bc4ff0e2b13408a82dca6a4c3b63822a

    SHA512

    c7257fb1cbeba635a677c68fcf9ba5f3a4367c6d7c0b3abdd6703503e5450df2c1c375c6bd434a59628461bab3cf6f80e1a76db7581fc35278826548cd2a52ab

  • memory/1320-58-0x0000000000000000-mapping.dmp

  • memory/1700-76-0x0000000074970000-0x0000000074F1B000-memory.dmp

    Filesize

    5.7MB

  • memory/1700-75-0x0000000074970000-0x0000000074F1B000-memory.dmp

    Filesize

    5.7MB

  • memory/1700-57-0x0000000000000000-mapping.dmp

  • memory/1768-64-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1768-77-0x0000000074970000-0x0000000074F1B000-memory.dmp

    Filesize

    5.7MB

  • memory/1768-62-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1768-78-0x0000000074970000-0x0000000074F1B000-memory.dmp

    Filesize

    5.7MB

  • memory/1768-65-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1768-68-0x000000000041E792-mapping.dmp

  • memory/1768-67-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1768-61-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1768-70-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1768-73-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/1964-71-0x0000000074970000-0x0000000074F1B000-memory.dmp

    Filesize

    5.7MB

  • memory/1964-55-0x0000000074970000-0x0000000074F1B000-memory.dmp

    Filesize

    5.7MB

  • memory/1964-56-0x0000000074970000-0x0000000074F1B000-memory.dmp

    Filesize

    5.7MB

  • memory/1964-54-0x0000000076411000-0x0000000076413000-memory.dmp

    Filesize

    8KB