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WebAssembly module
API
This view is built from:
Module analysis/api/v1/wasm/8f0e398948db5f633dc8c640f8ecd360fb233fb7181c404b2ebe39dbf1df8a0cDecompiled code/api/v1/wasm/8f0e398948db5f633dc8c640f8ecd360fb233fb7181c404b2ebe39dbf1df8a0c/code

8f0e398948db5f633dc8c640f8ecd360fb233fb7181c404b2ebe39dbf1df8a0c

Known library: dotLottie animation playerDense data
Download .wasmSearch 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
Known library: dotLottie animation player.
Names it came with
Came with the npm package @lottiefiles/dotlottie-wc 0.7.1 · Came with the npm package @lottiefiles/dotlottie-web 0.50.1 · From optiv.ceros.site · From cdn.jsdelivr.net · File name: dotlottie-player. Its build and the addresses it came from say so; whoever builds a module chooses these, so they are hints.
How it was built
Written in Rust and compiled with Emscripten.
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 1 public scan, 2026-10-05.
Findings
Dense data. Leads, not verdicts: legitimate modules show these too.
Size
1.3 MiB
First seen
2026-10-05
Last seen
2026-10-05
Public scans
1
Functions
4565
Imports
57
Exports
23
Data segments
306

How it was built

Written in Rust and compiled with Emscripten.

Language
RustThe Rust compiler (rustc) left its name in the module.
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.

What it is made of

9 Rust crates from crates.io, with the versions it was built with:

Read from text the build left in the module: source paths, build metadata and .NET metadata. Whoever builds a module can change or remove it, so treat it as a hint.

Hashing and cipher code

Algorithms recognised from their published constants, tables and rotation amounts: CRC-32. Legitimate modules use them all the time, for hashing, captchas and encryption, so this is a lead, not a verdict.

Decompiled code

4,560 of 4,565 functions decompiled to C-like pseudocode; 57 more are imported from the page.

  • 5 of 4,565 functions could not be decompiled.

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.

FunctionSizeBlocksComplexityNotes
No functions match.

File layout

WebAssembly binary format version 1, core module, 11 sections.

SectionOffsetSizeItems
type0x81.3 KiB164
import0x51e349 bytes57
function0x67b4.5 KiB4,565
table0x18799 bytes1
memory0x18829 bytes1
global0x188b15 bytes2
export0x189a138 bytes23
element0x19243.8 KiB1
datacount0x28454 bytes
code0x28491.1 MiB4,565
data0x11fb3b157.2 KiB306
Memory
268 pages (16.8 MiB), up to 32,768 pages (2.0 GiB)
Table
1,970 entries, up to 1,970 entries, funcref
Globals
2
Element segments
1
Declared data segments
306
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. 306 segments, 155.0 KiB in all. The chart shows 65: the first 64 and every encrypted or compressed one.

241 segments not drawn (106.1 KiB)02468Segment 0: 20,973 bytes, 5.18 bits per byteSegment 2: 1,161 bytes, 4.8 bits per byteSegment 4: 5,384 bytes, 4.72 bits per byteSegment 5: 80 bytes, 5.6 bits per byteSegment 6: 1,782 bytes, 4.86 bits per byteSegment 9: 25 bytes, 1.42 bits per byteSegment 10: 5,938 bytes, 6.48 bits per byteSegment 11: 503 bytes, 4.36 bits per byteSegment 12: 1,777 bytes, 4.3 bits per byteSegment 13: 114 bytes, 2.12 bits per byteSegment 14: 77 bytes, 1.43 bits per byteSegment 15: 118 bytes, 2.38 bits per byteSegment 16: 101 bytes, 1.78 bits per byteSegment 17: 105 bytes, 1.74 bits per byteSegment 18: 17 bytes, 0.95 bits per byteSegment 19: 25 bytes, 1.29 bits per byteSegment 20: 345 bytes, 3.01 bits per byteSegment 21: 2,413 bytes, 4.2 bits per byteSegment 22: 900 bytes, 7.28 bits per byteSegment 23: 17 bytes, 4.09 bits per byteSegment 24: 51 bytes, 1.5 bits per byteSegment 25: 879 bytes, 5.8 bits per byteSegment 26: 344 bytes, 6.58 bits per byteSegment 27: 212 bytes, 3.92 bits per byteSegment 28: 87 bytes, 3.83 bits per byteSegment 29: 21 bytes, 3.33 bits per byteSegment 30: 175 bytes, 4.09 bits per byteSegment 31: 21 bytes, 3.33 bits per byteSegment 32: 21 bytes, 3.33 bits per byteSegment 33: 15 bytes, 2.61 bits per byteSegment 34: 33 bytes, 3.63 bits per byteSegment 35: 63 bytes, 3.85 bits per byteSegment 36: 85 bytes, 3.16 bits per byteSegment 37: 21 bytes, 3.27 bits per byteSegment 38: 111 bytes, 4.29 bits per byteSegment 39: 21 bytes, 3.36 bits per byteSegment 40: 51 bytes, 3.67 bits per byteSegment 41: 419 bytes, 4.33 bits per byteSegment 42: 21 bytes, 3.33 bits per byteSegment 43: 369 bytes, 4.41 bits per byteSegment 44: 81 bytes, 3.98 bits per byteSegment 45: 119 bytes, 3.97 bits per byteSegment 46: 33 bytes, 3.73 bits per byteSegment 47: 63 bytes, 3.72 bits per byteSegment 48: 69 bytes, 2.59 bits per byteSegment 49: 39 bytes, 3.86 bits per byteSegment 50: 15 bytes, 3.32 bits per byteSegment 51: 15 bytes, 3.46 bits per byteSegment 52: 33 bytes, 3.22 bits per byteSegment 53: 21 bytes, 3.2 bits per byteSegment 54: 21 bytes, 3.37 bits per byteSegment 55: 33 bytes, 3.77 bits per byteSegment 56: 21 bytes, 3.46 bits per byteSegment 57: 15 bytes, 3.46 bits per byteSegment 58: 219 bytes, 4.1 bits per byteSegment 59: 446 bytes, 4.16 bits per byteSegment 60: 9 bytes, 1.45 bits per byteSegment 61: 204 bytes, 4.6 bits per byteSegment 62: 402 bytes, 3.15 bits per byteSegment 63: 15 bytes, 3.46 bits per byteSegment 101: 3,336 bytes, 7.58 bits per byte
data segment encrypted or compressed 241 segments not drawn 7.5 bits per byteHeight: bits per byte. Width: share of all the data.
  • Segment 101: 3,336 bytes at 7.58 bits per byte

Imports (57)

  • a.a
  • a.b
  • a.c
  • a.d
  • a.e
  • a.f
  • a.g
  • a.h
  • a.i
  • a.j
  • a.k
  • a.l
  • a.m
  • a.n
  • a.o
  • a.p
  • a.q
  • a.r
  • a.s
  • a.t
  • a.u
  • a.v
  • a.w
  • a.x
  • a.y
  • a.z
  • a.A
  • a.B
  • a.C
  • a.D
  • a.E
  • a.F
  • a.G
  • a.H
  • a.I
  • a.J
  • a.K
  • a.L
  • a.M
  • a.N
  • a.O
  • a.P
  • a.Q
  • a.R
  • a.S
  • a.T
  • a.U
  • a.V
  • a.W
  • a.X

Exports (23)

Scripts that carry or load it

  • unpkg.com 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.

ImportText
a.$void
a.Afloa
a.Adouble
a.DMode
a.Zstd::string
a._bool
a.cn_bits >= 0
a.cdeps/thorvg/src/loaders/webp/utils/bit_reader.cpp
a.cVP8LReadBits
a.cbr != NULL && br->buf_ != NULL
a.cdeps/thorvg/src/loaders/webp/dec/../utils/bit_reader_inl.
a.cVP8LoadNewBytes
a.cmeta_index < hdr->num_htree_groups_
a.cdeps/thorvg/src/loaders/webp/dec/vp8l.cpp
a.cGetHtreeGroupForPos
a.cbr->bit_pos_ >= VP8L_WBITS
a.cVP8LDoFillBitWindow
a.cReadTransform
a.cdec->next_transform_ <= NUM_TRANSFORMS
a.cnum_htree_groups <= MAX_HTREE_GROUPS
a.cdeps/thorvg/src/loaders/webp/
a.cVP8LHtreeGroupsNew
a.cdata == NULL
a.cDecodeImageStream
a.cbr != NULL
a.cVP8LInitBitReader
a.cstart != NULL
a.clength < 0xfffffff8u
a.cdeps/thorvg/src/loaders/we
a.cVP8InitBitReader

Showing 30 of 265.

In our sandbox

  • Produced 2 strings at run time, listed below.

Strings it produced at run time

Text that appeared while it ran and is not in the file: decoded, decrypted or built by its code. Web addresses are shown as their host.

  1. PointerUpPointerDownPointerEnterPointerMovePointerExitClickOnCompleteOnLoopCompleteParsing error: CreationErrorSecurityC
  2. >?>>?456789:;<=

Checks we ran

  • Threat-feed matches: none
  • Names of mining software or pools: none
  • CryptoNight mining structure: not found
  • Hashing or cipher loops: none
  • Known hashing or cipher algorithms: CRC-32
  • Encrypted or compressed data: 1 block, 3.3 KiB (2.1% 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.

Shares code with

Other modules that contain some of the same functions. They are ranked by functions few modules have, so a language's own runtime does not link every module built with it. Shared code often means a shared library or the same developer. It is a lead, not a verdict.

  • 1ad3a28a…3d2d441.8 MiB · first seen 2026-10-07 · 559 functions in common (32% of this module's, 25% of that one's)
  • a0ed8d98…edbaa11.1 MiB · first seen 2026-10-05 · 486 functions in common (28% of this module's, 31% of that one's)
  • 2c62b114…37fb031.1 MiB · first seen 2026-10-14 · 470 functions in common (27% of this module's, 30% of that one's)
  • f26659c7…352eae1.1 MiB · first seen 2026-10-05 · 190 functions in common (11% of this module's, 14% of that one's)

Seen on 1 public scan

PageTitleSeenHow it got there
www.optiv.comOptiv | Cybersecurity Consultants and Solutions2026-10-05Built by a script at run time; Downloaded as a file