Ni License Activator 1.3

License activation is a process used by software vendors to protect their intellectual property and ensure that users are complying with the End User License Agreement (EULA).

Software license activators, commonly referred to as "keygens" or "patchers," bypass legitimate licensing mechanisms. This paper presents a deep technical analysis of Ni License Activator 1.3, a tool designed to circumvent the licensing framework of NI (National Instruments) software suites, including LabVIEW, LabWindows/CVI, and NI Multisim. We dissect the activator’s methodology, including memory patching, license file injection, and network request spoofing. Furthermore, we evaluate the security risks posed by such tools, such as embedded malware, privilege escalation vulnerabilities, and the legal ramifications. The paper concludes with defensive recommendations for software vendors.

When executed, the activator:

Pseudo-assembly patch:

; Original code in NILM
mov eax, [expiration_time]
cmp eax, current_time
jnz LIC_EXPIRED

; Patched by Activator 1.3
mov eax, [expiration_time]
cmp eax, current_time
jmp LIC_VALID   ; always skip expiration
 Ni License Activator 1.3

Using IDA Pro or Ghidra on a sample of Ni License Activator 1.3 reveals the following patterns: License activation is a process used by software

NI licenses are RSA-signed .lic files containing XML with product codes and a checksum. Activator 1.3 includes a known private key (extracted from an older NI version’s debugging symbols) or uses a flaw in the padding oracle to generate valid signatures.

Example fabricated license block:

<License>
  <Product>LabVIEW_Pro_2024</Product>
  <Feature>ALL</Feature>
  <Expires>never</Expires>
  <Signature>0x4B7A3F2E...</Signature>
</License>
Ni License Activator 1.3