Resubmissions

02-09-2022 20:06

220902-yvgf4abefr 10

02-09-2022 20:04

220902-ytk3wseca6 10

02-09-2022 20:03

220902-ys52nsbedn 10

02-09-2022 19:55

220902-ynenxseba3 10

02-09-2022 19:49

220902-yj5pjseac3 10

02-09-2022 18:42

220902-xclsesdbc6 10

Analysis

  • max time kernel
    147s
  • 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
    02-09-2022 20:03

General

  • Target

    http://81.161.229.110/htdocs/

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

katiebrady616.ddns.net:705

Mutex

6614a0d3-74cf-4cba-9b22-46de5dee170d

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    katiebrady616.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2022-06-10T20:30:36.872525236Z

  • bypass_user_account_control

    true

  • bypass_user_account_control_data

  • clear_access_control

    true

  • clear_zone_identifier

    false

  • connect_delay

    4000

  • connection_port

    705

  • 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

    6614a0d3-74cf-4cba-9b22-46de5dee170d

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    katiebrady616.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.

  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Modifies Internet Explorer Phishing Filter 1 TTPs 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 42 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 6 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Program Files\Internet Explorer\iexplore.exe
    "C:\Program Files\Internet Explorer\iexplore.exe" http://81.161.229.110/htdocs/
    1⤵
    • Modifies Internet Explorer Phishing Filter
    • Modifies Internet Explorer settings
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1224
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:1224 CREDAT:17410 /prefetch:2
      2⤵
      • Modifies Internet Explorer settings
      • Suspicious use of SetWindowsHookEx
      PID:2304
    • C:\Users\Admin\Downloads\YjXWQorEXSCmNzB.exe
      "C:\Users\Admin\Downloads\YjXWQorEXSCmNzB.exe"
      2⤵
      • Executes dropped EXE
      • 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:4936

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\z2evvp3\imagestore.dat

    Filesize

    16KB

    MD5

    ccb1346ff55b6fe5ce7ad19aac3928bf

    SHA1

    3f21eed84d6f6f239627165d6f8a17a0e3ffc16b

    SHA256

    314e564d1d700696d11732c1f7c863d4ab5714ad2ad180815683a41ecde46c42

    SHA512

    5fa738bf5a69d28ce511279d154e7900f97edf18e0c6632d2a285a09c2de8fbbd1117493497a36b9c762cf4ca924874ea4df7deb194f1ff81ca77e5b7af01386

  • C:\Users\Admin\AppData\Local\Microsoft\Internet Explorer\imagestore\z2evvp3\imagestore.dat

    Filesize

    47KB

    MD5

    dd62364f65e260f3f99fc00e46613acb

    SHA1

    a36180bf85c92c2c1f547889459a3c1fc3eb9638

    SHA256

    08b618b270f48e91d2bc3bd073b1ecdafb38f9628bd6eb90f80b980eb2637e0e

    SHA512

    2af912dc17396d5670338dc04af6abc6a5fe840e025302c0e7f0278d08b20bf642da689079262651a932a3efe4432579761d07863649d3afba1a82f341789bb5

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\TQFWGWHN\favicon[1].ico

    Filesize

    30KB

    MD5

    6eb4a43cb64c97f76562af703893c8fd

    SHA1

    c50c4273b9d2433c6069454f971ed6653e07c126

    SHA256

    1d7c95c5eea00a8083a95810f902682f9e26e7fbb7876b022a403642d776d0c9

    SHA512

    3bae9380d8f0d45617ecf9d0d43818b7f8f83b61ecbd5e6dbd189c19d5853f92aa47965ad257cf712e49c03652f129dca47e8a8dbd86d62e614acc99ea931181

  • C:\Users\Admin\Downloads\YjXWQorEXSCmNzB.exe

    Filesize

    202KB

    MD5

    f47f4f40886f05a734e2d6e584d6ab10

    SHA1

    b2f9e9feeb10c857094003049e32b0aeb2e0ef9d

    SHA256

    9b144809ef27214ff63ef708350546d6aa01929f4bb8cfb12f3efc462b0b0cd1

    SHA512

    26f073459367829272ab0356475b9191b5e247c3ad66cf5c52465389eca662823c830717341fabfce8f199f6d0185c5e7118e0597b7b01f4057dfe520ac9e7df

  • C:\Users\Admin\Downloads\YjXWQorEXSCmNzB.exe.70ivmfg.partial

    Filesize

    202KB

    MD5

    f47f4f40886f05a734e2d6e584d6ab10

    SHA1

    b2f9e9feeb10c857094003049e32b0aeb2e0ef9d

    SHA256

    9b144809ef27214ff63ef708350546d6aa01929f4bb8cfb12f3efc462b0b0cd1

    SHA512

    26f073459367829272ab0356475b9191b5e247c3ad66cf5c52465389eca662823c830717341fabfce8f199f6d0185c5e7118e0597b7b01f4057dfe520ac9e7df

  • memory/4936-136-0x0000000000000000-mapping.dmp

  • memory/4936-138-0x000000006F610000-0x000000006FBC1000-memory.dmp

    Filesize

    5.7MB

  • memory/4936-139-0x000000006F610000-0x000000006FBC1000-memory.dmp

    Filesize

    5.7MB