Malicious APP detection model integrating multi-scale semantics and VMD-BiLSTM

Xu Guoliang; Shi Lei; Qiu Siqi; Xu Yu

doi:10.11959/j.issn.1000-436x.TXXB260119

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Malicious APP detection model integrating multi-scale semantics and VMD-BiLSTM

更新时间：2026-04-10

- Malicious APP detection model integrating multi-scale semantics and VMD-BiLSTM
- Journal on Communications (2026)
- 作者机构：
  
  重庆邮电大学通信与信息工程学院，重庆 400065
- 作者简介：
- 基金信息：
- DOI：10.11959/j.issn.1000-436x.TXXB260119
  CLC： TP393.08
- Received：11 March 2026，
  
  Revised：2026-04-09，
  
  Accepted：10 April 2026，
- 稿件说明：
移动端阅览
Xu Guoliang, Shi Lei, Qiu Siqi, et al. Malicious APP detection model integrating multi-scale semantics and VMD-BiLSTM[J/OL]. Journal on Communications, 2026.
DOI：

Xu Guoliang, Shi Lei, Qiu Siqi, et al. Malicious APP detection model integrating multi-scale semantics and VMD-BiLSTM[J/OL]. Journal on Communications, 2026. DOI： 10.11959/j.issn.1000-436x.TXXB260119.

摘要

针对加密流量中恶意APP特征难提取、背景噪声大及模型缺乏透明度的问题，提出一种一种融合变分模态分解(VMD)、Attention-BiLSTM与SHAP机制的检测模型。首先，针对移动APP流量的多尺度特性，设计自适应多尺度窗口机制，动态提取并构建融合语义的高维时间序列；其次，为处理该结构化序列中交织的复杂环境噪声，引入变分模态分解(VMD)进行频域平稳化降噪，并利用结合焦点损失的Attention-BiLSTM网络精准捕获长程时序依赖；最后，引入SHAP机制量化特征的边际贡献，提供事后归因解释以辅助决策溯源。实验表明，该模型准确率达98.18%，在实现较高精度检测的同时，提升了模型判决的透明度与可信度。

Abstract

To address the challenges of difficult feature extraction

high background noise

and a lack of model transparency in identifying malicious applications within encrypted traffic

this paper proposes a novel detection model integrating Variational Mode Decomposition (VMD)

Attention-BiLSTM

and the SHAP mechanism. First

targeting the multi-scale characteristics of mobile APP traffic

an adaptive multi-scale window mechanism is designed to dynamically extract and construct semantic-driven high-dimensional time series. Second

to mitigate the complex environmental noise intertwined within these structured sequences

VMD is introduced for frequency-domain stationary denoising. Subsequently

an Attention-BiLSTM network coupled with Focal Loss is employed to accurately capture long-range temporal dependencies. Finally

the SHAP mechanism is incorporated to quantify the marginal contributions of features

providing post-hoc attribution explanations to facilitate decision traceability. Experimental results demonstrated that the proposed model achieved an accuracy of 98.18%

successfully realizing high-precision detection while simultaneously enhancing the transparency and credibility of the model's decision-making process.

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Keywords

references

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