Analysis

  • max time kernel
    148s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/01/2024, 10:25

General

  • Target

    771b029ca2ea27495376d8783f14f7f9.exe

  • Size

    880KB

  • MD5

    771b029ca2ea27495376d8783f14f7f9

  • SHA1

    2fcceb16b9cbb40ba7674aa7f7ac21ec3e15593a

  • SHA256

    668ae0ac95f0d86230704acfd42aeec2837d51e16486e96b52fcf51907b6ddbd

  • SHA512

    dfa483eae106a628835dd82aaab1cbf9a9a68ef632ed6a2baf09ff8ca0887ec1b3852f5cf493caf85af1be7c5209ee063ab88966d5d83701b4772888cba2c0c4

  • SSDEEP

    24576:b8mTQXkDFBvRll2PrGzx/LUYfxfFOhByMXFXc5n:4cQ0DPsPyfxdOoWFX

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

xp18.ddns.net:1012

Mutex

ef6b2072-3b38-4899-b925-378df7ad2d73

Attributes
  • activate_away_mode

    true

  • backup_connection_host

    xp18.ddns.net

  • backup_dns_server

    8.8.4.4

  • buffer_size

    65535

  • build_time

    2021-04-23T05:59:24.479035036Z

  • 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

    1012

  • 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

    ef6b2072-3b38-4899-b925-378df7ad2d73

  • mutex_timeout

    5000

  • prevent_system_sleep

    false

  • primary_connection_host

    xp18.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 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\771b029ca2ea27495376d8783f14f7f9.exe
    "C:\Users\Admin\AppData\Local\Temp\771b029ca2ea27495376d8783f14f7f9.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3544
    • C:\Users\Admin\AppData\Local\Temp\771b029ca2ea27495376d8783f14f7f9.exe
      "C:\Users\Admin\AppData\Local\Temp\771b029ca2ea27495376d8783f14f7f9.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:2796
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DHCP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpCBF6.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:3188
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks.exe" /create /f /tn "DHCP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpD85B.tmp"
        3⤵
        • Creates scheduled task(s)
        PID:4844

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v2.0_32\UsageLogs\771b029ca2ea27495376d8783f14f7f9.exe.log

    Filesize

    496B

    MD5

    5b4789d01bb4d7483b71e1a35bce6a8b

    SHA1

    de083f2131c9a763c0d1810c97a38732146cffbf

    SHA256

    e248cef9500ed6e0c9f99d72a2a6a36955a5f0cfc0725748ef25a733cc8282f6

    SHA512

    357e18ef30430e4b9cc4f2569b9735b1cd12f934c83162e4de78ac29ba9703b63ddb624ccc22afd5a5868f6e9d91a3c64581846abac22e9625f5b2e3d80b3ede

  • C:\Users\Admin\AppData\Local\Temp\tmpCBF6.tmp

    Filesize

    1KB

    MD5

    ed32dd906845ffe39bc55d203a47e9ab

    SHA1

    679f6ab7bc2c35f5fa5260fb35fe769df92645b5

    SHA256

    4cb9909da90a374e8130b361d1774e990794b55d5677164c5a2833cfce6b7975

    SHA512

    f400f6d4904b3dc9e13c7a0c22ee90905823d30ee904d67b829db27111eaed81ccdfc6b32c963e2f4a2e2aa5bd4a9f1fca5490327d9cdb4c544dfad398180091

  • C:\Users\Admin\AppData\Local\Temp\tmpD85B.tmp

    Filesize

    1KB

    MD5

    7f4b37265a0a4b0fea67999d11d911e8

    SHA1

    1b8e13e6a27c3768c30cf713b79eaa8a757e1349

    SHA256

    39b16b3a00b6b43c6820357127228c0768a577153014ce7b0ea3c585244dc08b

    SHA512

    ef97ccfb663555aedc7fdc4b3ac4cd6536c80a778b4ec3bc6124a09544733988de1dac1e6a3714b0d6e8713e3523e0732d5dfcf674f2c5e1f3eadacb0c8e5e03

  • memory/2796-9-0x0000000074850000-0x0000000074E01000-memory.dmp

    Filesize

    5.7MB

  • memory/2796-20-0x00000000015A0000-0x00000000015B0000-memory.dmp

    Filesize

    64KB

  • memory/2796-23-0x00000000015A0000-0x00000000015B0000-memory.dmp

    Filesize

    64KB

  • memory/2796-6-0x0000000000400000-0x0000000000438000-memory.dmp

    Filesize

    224KB

  • memory/2796-22-0x00000000015A0000-0x00000000015B0000-memory.dmp

    Filesize

    64KB

  • memory/2796-21-0x0000000074850000-0x0000000074E01000-memory.dmp

    Filesize

    5.7MB

  • memory/2796-10-0x00000000015A0000-0x00000000015B0000-memory.dmp

    Filesize

    64KB

  • memory/2796-11-0x0000000074850000-0x0000000074E01000-memory.dmp

    Filesize

    5.7MB

  • memory/3544-3-0x0000000074850000-0x0000000074E01000-memory.dmp

    Filesize

    5.7MB

  • memory/3544-2-0x00000000018D0000-0x00000000018E0000-memory.dmp

    Filesize

    64KB

  • memory/3544-1-0x0000000074850000-0x0000000074E01000-memory.dmp

    Filesize

    5.7MB

  • memory/3544-12-0x0000000074850000-0x0000000074E01000-memory.dmp

    Filesize

    5.7MB

  • memory/3544-0-0x0000000074850000-0x0000000074E01000-memory.dmp

    Filesize

    5.7MB

  • memory/3544-4-0x00000000018D0000-0x00000000018E0000-memory.dmp

    Filesize

    64KB

  • memory/3544-5-0x00000000018D0000-0x00000000018E0000-memory.dmp

    Filesize

    64KB