Overview

overview

8

Static

static

3

NUSANTARA-...5D.exe

windows10-2004-x64

8

NUSANTARA-...5D.exe

windows11-ltsc_2024-x64

8

Analysis

  • max time kernel
    149s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260911-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260911-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    30/09/2026, 00:21

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General

  • Target
    NUSANTARA-LS_%5BDN%5D.exe
  • Size 47KB
  • Sample260930-ancbssxt2l
  • SHA256 75ed1a9f5a3297a71b4493d080a2c42c98f897302cb4682c27b7a7c2d79f22ca
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
bootkitdiscoverypersistenceransomware

Malware Config

Signatures

  • Downloads MZ/PE file 2 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

    bootkitpersistence
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs

    The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.

    discovery
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Modifies registry class 1 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NUSANTARA-LS_%5BDN%5D.exe
    "C:\Users\Admin\AppData\Local\Temp\NUSANTARA-LS_%5BDN%5D.exe"
    1⤵
    • Downloads MZ/PE file
    • Checks computer location settings
    • Writes to the Master Boot Record (MBR)
    • Drops file in Windows directory
    • Reads the TCP/IP host and domain name from the registry
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3792
    • C:\Windows\SysWOW64\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\NCZ.log
      2⤵
      • System Location Discovery: System Language Discovery
      • Opens file in notepad (likely ransom note)
      PID:4152

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        NCZ.log
        • Path C:\Users\Admin\AppData\Local\Temp\NCZ.log
        • Size 71B
        • SHA256 869d38c2845ecf475ab271144044e136fbd33fe6589260a1a56bd3ed40d7ce22
        • MD5 SHA1 SHA512 TLSH
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