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audiosrv.exe

Microsoft @ Windows @ Operating System

Hefei Hejunzhengce Info Tech Co., Ltd.

The application audiosrv.exe, “Windows Audio Services” by Hefei Hejunzhengce Info Tech Co. has been detected as a potentially unwanted program by 9 anti-malware scanners. It runs as a windows Service named “Windows Audio Services (R1)”. This setup program installs potentially unwanted software on the user's PC at the same time as the expected/marketing software, without adequate consent. The program is typically installed via a form of malvertising While running, it connects to the Internet address 8a.eb.6132.ip4.static.sl-reverse.com on port 80 using the HTTP protocol.
Publisher:
Hefei Hejunzhengce Info Tech Co., Ltd.  (signed and verified)

Product:
Microsoft @ Windows @ Operating System

Description:
Windows Audio Services

Version:
1.7.9.3

MD5:
0e3efe15ab7766c5d59c270804a69ecc

SHA-1:
d1c7944424526232f5645160a6a61444e2942de2

SHA-256:
7cad08c5f67afbc64c137a6616214fbd1abfaef15f3fc7cb3d7c8fd1dcb9872e

Scanner detections:
9 / 68

Status:
Potentially unwanted

Analysis date:
4/25/2024 6:57:25 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Gen:Trojan.Heur.1R1@rmxoUooQ
667

Bitdefender
Gen:Trojan.Heur.1R1@rmxoUooQ
1.0.20.490

Emsisoft Anti-Malware
Gen:Trojan.Heur.1R1@rmxoUooQ
8.15.04.08.05

F-Secure
Gen:Trojan.Heur.1R1@rmxoUooQ
11.2015-08-04_4

G Data
Gen:Trojan.Heur.1R1@rmxoUooQ
15.4.25

Microsoft Security Essentials
SoftwareBundler:Win32/WinOptimizer
1.201.2189.0

MicroWorld eScan
Gen:Trojan.Heur.1R1@rmxoUooQ
16.0.0.294

Sophos
PUA 'WinOptimizer'
5.15

VIPRE Antivirus
Threat.4150696
41608

File size:
3.8 MB (4,024,920 bytes)

Product version:
1.7.9.3

Copyright:
Hefei Hejunzhengce Info Tech Co., Ltd.

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\Program Files\windows audio\r1\audiosrv.exe

Digital Signature
Signed by:
Hefei Hejunzhengce Info Tech Co., Ltd.

Authority:
WoSign CA Limited

Valid from:
3/6/2015 7:35:27 AM

Valid to:
12/30/2016 7:35:27 AM

Subject:
CN="Hefei Hejunzhengce Info Tech Co., Ltd.", O="Hefei Hejunzhengce Info Tech Co., Ltd.", L=Hefei, S=Anhui, C=CN

Issuer:
CN=WoSign Class 3 Code Signing CA, O=WoSign CA Limited, C=CN

Serial number:
3312D0B8D4D7941DF85AA59F134E7719

File PE Metadata
Compilation timestamp:
4/7/2015 1:41:50 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
49152:h8exkXcSQRmgvzU24jQ2iG1eTPU+dIBoyJX97KBTtTIvgI9hCywnxiy:h8ezGQy+dfyJ5teOy

Entry address:
0x311E44

Entry point:
55, 8B, EC, 83, C4, F0, 53, B8, 5C, 36, 70, 00, E8, 0F, A3, CF, FF, A1, 34, 0C, 72, 00, 8B, 00, 80, 78, 38, 00, 74, 10, A1, 34, 0C, 72, 00, 8B, 00, E8, 56, 25, E2, FF, 84, C0, 74, 0C, A1, 34, 0C, 72, 00, 8B, 00, 8B, 10, FF, 52, 44, 8B, 0D, EC, 0A, 72, 00, A1, 34, 0C, 72, 00, 8B, 00, 8B, 15, 6C, 31, 70, 00, 8B, 18, FF, 53, 40, A1, 34, 0C, 72, 00, 8B, 00, 8B, 10, FF, 52, 48, 5B, E8, AC, 58, CF, FF, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00...
 
[+]

Entropy:
6.7957

Developed / compiled with:
Microsoft Visual C++

Code size:
3.1 MB (3,213,824 bytes)

Service
Display name:
Windows Audio Services (R1)

Service name:
WinAudioSrv_R1

Description:
Manages audio for Windows-based programs. If this service is stopped, audio devices and effects will not function properly. If this service is disabled, any services that explicitly depend on it wil

Type:
Win32OwnProcess, InteractiveProcess


The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to 8a.eb.6132.ip4.static.sl-reverse.com  (50.97.235.138:80)

TCP (HTTP):
Connects to hit-adult.opendns.com  (146.112.61.106:80)

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