Analysis

  • max time kernel
    136s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-04-2024 08:51

General

  • Target

    2384_InstallUtil_exe_Reflective_00000000038964E0.exe

  • Size

    235KB

  • MD5

    ba1050800854b07127972232e847eebb

  • SHA1

    e29ae9df8c97ff93250dddb0126fb063273e8c03

  • SHA256

    fc565edd736e70f3f4047d2066f7f63cc6491b9bddd9419d39cd02323733d767

  • SHA512

    a2e69ddc5c8d5a831f102ea3adc92eba05ac4966504deff9f98de56c1c14c3e07c3f5f3c2b4dbbe4d61a5c87c1da80a0654ad2f83979351acdacf78cbab164e5

  • SSDEEP

    6144:FdxOj6QxLvxBX0EwKVztxDVs3nXgNlBbhOh8MPb3:Ej6QxLvxBXnZJXxQnohO7z

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

snopper13.ddns.net:1996

185.208.211.17:1996

Mutex

639667a7-ccc3-45df-9155-94515c6e197f

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    185.208.211.17

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2018-02-17T08:55:58.187172536Z

  • bypass_user_account_control

    false

  • bypass_user_account_control_data

    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

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    1996

  • 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

    639667a7-ccc3-45df-9155-94515c6e197f

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    snopper13.ddns.net

  • 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.

  • 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
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 5 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\2384_InstallUtil_exe_Reflective_00000000038964E0.exe
    "C:\Users\Admin\AppData\Local\Temp\2384_InstallUtil_exe_Reflective_00000000038964E0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2284
    • C:\Users\Admin\AppData\Local\Temp\2384_InstallUtil_exe_Reflective_00000000038964E0.exe
      "C:\Users\Admin\AppData\Local\Temp\2384_InstallUtil_exe_Reflective_00000000038964E0.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
      • Suspicious use of WriteProcessMemory
      PID:4580
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "WPA Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpBFC6.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:2216
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "WPA Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpC034.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:2572

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpBFC6.tmp

    Filesize

    1KB

    MD5

    f3a59537639fe8c78e90e3371c80e8ad

    SHA1

    c08bb8a2536160f1067061b7285bb63b2c5db05f

    SHA256

    5746babdcd4ff5472d674376fb6d2fab529a58efc9fd55a28d28c83699e07620

    SHA512

    1d189bd1d84b068bf9d155e819aad65e8c18cfb2d30f8c53a8394e19786a3f933c4ab6e17e91aa57b0ff38feebc2179cabaafe9f941135ed3909a7313510f06c

  • C:\Users\Admin\AppData\Local\Temp\tmpC034.tmp

    Filesize

    1KB

    MD5

    1c18d34e4c00b9a6b81126a2f10bbb74

    SHA1

    9c975e7627bdb8d7af3615684d59fa02c3b81902

    SHA256

    ee68aecf2917fd9ddd167e6403d3149ac3dd7f346f3c9c66b6d75620b0ccd621

    SHA512

    75a3ecebd55c8e433199122925c7c612fe3ea23a93fbca10ed83c80f11396da428581e36c42e98a0eef5210630cea040ed0da076bfcb620ddb38dee7152b816d

  • memory/2284-3-0x0000000074C10000-0x00000000751C1000-memory.dmp

    Filesize

    5.7MB

  • memory/2284-0-0x0000000074C10000-0x00000000751C1000-memory.dmp

    Filesize

    5.7MB

  • memory/2284-9-0x0000000074C10000-0x00000000751C1000-memory.dmp

    Filesize

    5.7MB

  • memory/2284-2-0x0000000000BD0000-0x0000000000BE0000-memory.dmp

    Filesize

    64KB

  • memory/2284-1-0x0000000074C10000-0x00000000751C1000-memory.dmp

    Filesize

    5.7MB

  • memory/4580-4-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/4580-6-0x0000000074C10000-0x00000000751C1000-memory.dmp

    Filesize

    5.7MB

  • memory/4580-8-0x0000000074C10000-0x00000000751C1000-memory.dmp

    Filesize

    5.7MB

  • memory/4580-7-0x00000000014D0000-0x00000000014E0000-memory.dmp

    Filesize

    64KB

  • memory/4580-17-0x00000000014D0000-0x00000000014E0000-memory.dmp

    Filesize

    64KB

  • memory/4580-18-0x0000000074C10000-0x00000000751C1000-memory.dmp

    Filesize

    5.7MB

  • memory/4580-19-0x00000000014D0000-0x00000000014E0000-memory.dmp

    Filesize

    64KB

  • memory/4580-20-0x00000000014D0000-0x00000000014E0000-memory.dmp

    Filesize

    64KB