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opera_download.exe

DownloadShield

The application opera_download.exe by DownloadShield has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. The file has been seen being downloaded from www.browserwin.com and multiple other hosts.
Publisher:
DownloadShield  (signed and verified)

MD5:
7a386a523f597e83feaf8f51736c331c

SHA-1:
6a1cbc9f373f57c69eab5fbddbc78a348b4a99a8

SHA-256:
651ab88f403900e247bb7fdd4ca4cd57a19480dcf25ed7a37b5587dabc506823

Scanner detections:
1 / 68

Status:
Adware

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Analysis date:
4/18/2024 3:04:01 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.DownloadShield.Installer (M)
15.12.31.15

File size:
232.5 KB (238,040 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\downloads\opera_download.exe

Digital Signature
Signed by:
DownloadShield

Authority:
VeriSign, Inc.

Valid from:
12/21/2015 4:00:00 PM

Valid to:
3/21/2019 4:59:59 PM

Subject:
CN=DownloadShield, O=DownloadShield, L=San Jose, S=California, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
78070F8D972292519C0C15749BCB3808

File PE Metadata
Compilation timestamp:
8/28/2014 9:10:25 PM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
9.0

CTPH (ssdeep):
6144:z6A3gKJaedvosFDv6BtgZHbGYXwj5484rLZ:HfaCvos1G2ZyYXU4f

Entry address:
0x31E8

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, E0, 73, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, B8, 3C, 42, 00, E8, 23, 25, 00, 00, 53, 68, 60, 01, 00, 00, A3, C0, 3B, 42, 00, 8D, 44, 24, 38, 50, 53, 68, DB, 73, 40, 00, FF, 15, 58, 71, 40, 00, 68, D0, 73, 40, 00, 68, C0, 33, 42, 00, E8, 15, 24, 00, 00, FF, 15, AC, 70, 40, 00, 50, BF, 00, 90, 42, 00, 57, E8, 03, 24, 00, 00...
 
[+]

Entropy:
7.7720

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

The file opera_download.exe has been seen being distributed by the following 2 URLs.

http://www.browserwin.com/.../download

http://www.browserwin.com/opera/.../Opera_Download.exe

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