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Wireguard-installer(1).exe Backdoor Quasar Analysis

Updated 14 hours ago
Checked by Malware Check
wireguard-installer(1).exe

Technical Analysis

File Name wireguard-installer(1).exe
File Type
PE32 executable (GUI) Intel 80386, for MS Windows
Scanner Version 1.0.219.174
Database Version 2025-06-26 23:00:21 UTC
⚠

Backdoor.Win32.Quasar.tr

Malware family: Quasar

N/A
Detection Rate
87,360
File Size (bytes)
2025-06-26
Analysis Date

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File Identification

Hash Type Value Action
MD5
1cf9257c07936d7fbf508dc113e9b6d5
SHA1
324f8a1f0779fe42baabc544bc7f6814a3d150ca
SHA256
eeee2b0a6ad1c7e4614fed4dfbe58b63776f6a3a6758267b5a976b4dc4315f48
SHA512
081fa75e73138fb403aa01cb09f3051b7ee6954ab0a15366016cabe873d7a64f8374c85d9bcdf068fa019930419c818d102063983a5547ae5107773fe25e5c12
ImpHash
5c900c91f80fa7e4541847a2f04d55bd

PE Analysis

Basic Information

▼
Icon
Hash: 7d276439d9810323502f89b8e46d1edd
Fuzzy: 89745e05fcc1193c9e6f7bd2da24eeea
dHash: f0f261edec6c98f0
Image Base 0x00400000
Entry Point 0x00401110
Compilation Time 2022-01-06 16:16:06
Checksum 0x0002368b (Actual: 0x0002368b)
OS Version 6.1
PEiD Signatures PE32 executable (GUI) Intel 80386, for MS Windows
Digital Signature OK
Imports 3 libraries
KERNEL32, ntdll, msvcrt
Exports 0 functions
Resources 6 Resources
Sections 6 Sections

Version Information

▼
CompanyName WireGuard LLC
FileDescription WireGuard Installer: Fast, Modern, Secure VPN Tunnel
FileVersion 1.0
InternalName wireguard-installer
LegalCopyright Copyright © 2015-2022 Jason A. Donenfeld <[email protected]>. All Rights Reserved.
OriginalFilename wireguard-installer.exe
ProductName WireGuard
ProductVersion 1.0
Comments https://www.wireguard.com/
Translation 0x0409 0x04b0

PE Sections

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Name Virtual Address Virtual Size Raw Size Entropy Characteristics MD5
.text 0x00001000 37,002 bytes 37,376 bytes 6.35 (Normal) IMAGE_SCN_CNT_CODE|IMAGE_SCN_MEM_EXECUTE|IMAGE_SCN_MEM_READ EA03A25A29A9A835AE3B79C8BD6C8E53
.rdata 0x0000b000 7,002 bytes 7,168 bytes 5.68 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ 8EA340AE1985338508E101B4750D7130
.data 0x0000d000 17,704 bytes 512 bytes 2.14 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE FBED440F2BE0D95CD06B86B838B6F022
.tls 0x00012000 8 bytes 512 bytes 0.00 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ|IMAGE_SCN_MEM_WRITE BF619EAC0CDF3F68D496EA9344137E8B
.rsrc 0x00013000 25,536 bytes 25,600 bytes 5.58 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_READ 0A204F9B335CC1FB8F5BC1E4695DFC52
.reloc 0x0001a000 1,580 bytes 2,048 bytes 5.69 (Normal) IMAGE_SCN_CNT_INITIALIZED_DATA|IMAGE_SCN_MEM_DISCARDABLE|IMAGE_SCN_MEM_READ BA58008E0872561DF08DB7B816FB44C8

Resource Analysis

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Total Resources: 6 (25,125 bytes)
Resource Type Count Total Size Percentage
RT_ICON 3 22,328 bytes
88.9%
RT_GROUP_ICON 1 48 bytes
0.2%
RT_VERSION 1 1,004 bytes
4%
RT_MANIFEST 1 1,745 bytes
6.9%

Certificate Chain Analysis

▼
No Digital Signatures

This file is not digitally signed.

Security Implications:
  • Cannot verify the publisher's identity
  • Increased security risk when running this file
  • May trigger security warnings on some systems

⚠ This file either lacks a digital signature or the certificate chain could not be verified
Exercise caution when executing unsigned files from unknown sources

Certificate Verification Status

OK

Backdoor.Win32.Quasar.tr Removal

Gridinsoft has the capability to identify and eliminate Backdoor.Win32.Quasar.tr without requiring further user intervention.

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Removal Instructions

Follow these steps to completely remove the threat from your system

  1. Start by downloading Gridinsoft Anti-Malware to your computer.
  2. Double-click on the gsam-en-install.exe file and follow the on-screen instructions to install the program.
  3. Once the installation of Gridinsoft Anti-Malware is complete, the program will open on the Scan screen.
  4. Click on the "Standard Scan" button to begin scanning your computer for threats.
  5. After the scanning process is finished, click on "Clean Now" to remove any detected threats.
  6. If prompted, restart your system to complete the removal process and ensure all threats are eliminated.
Important: Before You Start
Disconnect from the internet to prevent the malware from spreading or downloading additional threats. Run the scan in Safe Mode for better detection and removal of persistent threats.

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