40a211eb1dc8614aa5dc6342dbf5f87e932974ed12557ac0718bd44b771adc25

Dense data Hashing or cipher loops

Download .wasm Search scans with this module

The file is the module exactly as the page had it. WebAssembly does nothing on its own: it runs only when a script instantiates it. Labels describe what the module contains and are leads, not verdicts.

At a glance

What it is: Not identified. Its build does not name it and it matches no library we know.
Names it came with: File name: noise-c (2 sites). Its build and the addresses it came from say so; whoever builds a module chooses these, so they are hints.
How it was built: Compiled with Emscripten, usually from C or C++.
What it can do: None of its imports reaches the network, runs code or changes the page. Judged from the names of its imports.
Where we saw it: On 2 public scans, 2026-10-08 to 2026-10-26.
Findings: Dense data, Hashing or cipher loops. Leads, not verdicts: legitimate modules show these too.

Size: 155.6 KiB
First seen: 2026-10-08
Last seen: 2026-10-26
Public scans: 2
Functions: 273
Imports: 15
Exports: 54
Data segments: 6

How it was built

Compiled with Emscripten, usually from C or C++.

Language: C or C++, probablyNot named. Emscripten and clang mostly compile C and C++.
Compiler: EmscriptenThe toolchain that compiles C and C++ (sometimes Rust) for the web. It comes with the JavaScript that loads the module.
Compiler backend: LLVMThe code generator behind rustc, clang, Emscripten and TinyGo.

Read from text inside the module (its build metadata and paths the compiler left) and from its import and export names. Whoever builds a module can change or remove these, so treat them as hints. They say how a module was made, not what it does.

Hashing and cipher code

Algorithms recognised from their published constants, tables and rotation amounts: AES, BLAKE2b, BLAKE2s or BLAKE3, ChaCha20, Keccak (SHA-3), SHA-256, SHA-256 or BLAKE2s/BLAKE3, SHA-512, SHA-512 or BLAKE2b, Salsa20 or ChaCha. Legitimate modules use them all the time, for hashing, captchas and encryption, so this is a lead, not a verdict.

function 61SHA-512 · a table it reads
function 62SHA-256, SHA-512 · a table it reads
function 90ChaCha20 ·
function 91BLAKE2b · constants in its code
function 92AES · a table it reads
function 98BLAKE2s or BLAKE3 · constants in its code
function 120ChaCha20, Salsa20 or ChaCha · a table it reads
function 145Keccak (SHA-3) ·
function 209SHA-256 or BLAKE2s/BLAKE3 · constants in its code
function 214Salsa20 or ChaCha · a table it reads
function 217SHA-512 or BLAKE2b · constants in its code
function 273SHA-256 or BLAKE2s/BLAKE3 · constants in its code

Decompiled code

273 of 273 functions decompiled to C-like pseudocode; 10 more are imported from the page.

Decompiled code is a reconstruction from the file, so names and types are often guesses. Query values in URLs are masked here; the downloaded file is unchanged.

Find a functionSortShow

Function	Size	Blocks	Complexity	Notes
No functions match.

File layout

WebAssembly binary format version 1, core module, 8 sections.

Section	Offset	Size	Items
type	0x8	160 bytes	23
import	0xa8	313 bytes	15
function	0x1e1	278 bytes	273
global	0x2f7	13 bytes	2
export	0x304	1.8 KiB	54
element	0xa21	112 bytes	1
code	0xa91	112.8 KiB	273
data	0x1cdd8	40.1 KiB	6

Memory: 256 pages (16.0 MiB), up to 256 pages (16.0 MiB), imported from the page as env.memory
Table: 68 entries, up to 68 entries, funcref, imported from the page as env.table
Globals: 2
Element segments: 1
Function names: none (names were stripped)

Data segments

Each bar is one segment of the module's data: as wide as its size, as tall as its entropy. Bars above the dashed line are encrypted or compressed. 6 segments, 40.1 KiB in all.

data segment encrypted or compressed 7.5 bits per byteHeight: bits per byte. Width: share of all the data.

Segment 3: 4,304 bytes at 7.98 bits per byte
Segment 5: 25,504 bytes at 7.98 bits per byte

Imports (15)

env.memory
env.table
env.tableBase
env.DYNAMICTOP_PTR
env.STACKTOP
env.abort
env.enlargeMemory
env.getTotalMemory
env.abortOnCannotGrowMemory
env.___assert_fail
env.___setErrNo
env._emscripten_memcpy_big
env._llvm_stackrestore
env._llvm_stacksave
env._noise_rand_bytes

Exports (54)

Scripts that carry or load it

spiegelenberg.nu loads it; the script is minified or bundled.

From public scans. A script loads a module when it fetches or compiles it.

Text it passes to the page

Fixed text the module hands to the page's JavaScript when it calls an import, read from the module file. Imports that reach the network, run code or change the page come first; web addresses are shown as their host.

Import	Text
env.___assert_fail	limb == 0
env.___assert_fail	vendor/src/crypto/goldilocks/src/p448/arch_32/p448.c
env.___assert_fail	is_zero(scarry) \| is_zero(scarry+1)
env.___assert_fail	p448_strong_reduce
env.___assert_fail	is_zero(carry + scarry)

In our sandbox

Nothing notable.

Checks we ran

Threat-feed matches: none
Names of mining software or pools: none
CryptoNight mining structure: not found
Hashing or cipher loops: 6 functions (common in codecs and captchas)
Known hashing or cipher algorithms: AES, BLAKE2b, BLAKE2s or BLAKE3, ChaCha20, Keccak (SHA-3), SHA-256, SHA-256 or BLAKE2s/BLAKE3, SHA-512, SHA-512 or BLAKE2b, Salsa20 or ChaCha
Encrypted or compressed data: 1 block, 24.9 KiB (62.1% of its data)
JavaScript stored inside: none
Other modules inside: none
Imports that read browser or page details: none
Function names: removed (usual in release builds)

Static checks of the file: nothing in it was run for these. A finding is a lead, not a verdict.

Seen on 2 public scans

Page	Title	Seen	How it got there
spiegelenberg.nu	Home	2026-10-26	Built by a script at run time; Downloaded as a file
iszenas-ha.fr1.quickconnect.to	ISZENAS-HA - Synology NAS	2026-10-08	Downloaded as a file