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1stbrowser.exe

Installer

SIEN S.A.

This is the SIEN AppScion Installer which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed with minimal consent. The application 1stbrowser.exe by SIEN S.A has been detected as a potentially unwanted program 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 SIEN SuperInstall installer. While running, it connects to the Internet address www.ibbalance.com on port 443.
Publisher:
SIEN  (signed by SIEN S.A.)

Product:
Installer

Version:
3.48.3.2

MD5:
ec37738233944655628e337a4da32420

SHA-1:
bde875bb0123e7240e8d4e0631d1fdae1c85083c

SHA-256:
9884f7e87f38269452ec9f8fc22d965555b8dc5c3726086d652c2b8506ce9d6b

Scanner detections:
1 / 68

Status:
Potentially unwanted

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.

Description:
This is an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
5/17/2024 5:47:15 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien (M)
17.3.15.0

File size:
3.7 MB (3,832,424 bytes)

Product version:
3.48.3.2

Copyright:
Copyright (C) 2015

Original file name:
Installer.exe

File type:
Executable application (Win32 EXE)

Bundler/Installer:
SIEN SuperInstall

Language:
English (United States)

Common path:
C:\users\{user}\downloads\1stbrowser.exe

Digital Signature
Signed by:
SIEN S.A.

Authority:
GlobalSign nv-sa

Valid from:
6/15/2015 11:50:10 AM

Valid to:
6/15/2016 11:50:10 AM

Subject:
CN=SIEN S.A., O=SIEN S.A., L=Paris, C=FR

Issuer:
CN=GlobalSign CodeSigning CA - SHA256 - G2, O=GlobalSign nv-sa, C=BE

Serial number:
1121D1DF1CB73206967A3311ED8724668997

File PE Metadata
Compilation timestamp:
11/25/2015 11:28:00 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

Entry address:
0x2092F1

Entry point:
E8, 55, 3E, 02, 00, E9, 39, FE, FF, FF, 8B, 4D, F4, 64, 89, 0D, 00, 00, 00, 00, 59, 5F, 5F, 5E, 5B, 8B, E5, 5D, 51, C3, 8B, 4D, F0, 33, CD, E8, EB, AB, FF, FF, E9, DD, FF, FF, FF, 8B, 4D, EC, 33, CD, E8, DC, AB, FF, FF, E9, CE, FF, FF, FF, 50, 64, FF, 35, 00, 00, 00, 00, 8D, 44, 24, 0C, 2B, 64, 24, 0C, 53, 56, 57, 89, 28, 8B, E8, A1, 90, 24, 72, 00, 33, C5, 50, FF, 75, FC, C7, 45, FC, FF, FF, FF, FF, 8D, 45, F4, 64, A3, 00, 00, 00, 00, C3, 50, 64, FF, 35, 00, 00, 00, 00, 8D, 44, 24, 0C, 2B, 64, 24, 0C, 53...
 
[+]

Code size:
2.5 MB (2,642,432 bytes)

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

TCP (HTTP):
Connects to www.softologic.com  (174.37.181.31:80)

TCP (HTTP SSL):
Connects to www.ibbalance.com  (173.192.190.227:443)

Remove 1stbrowser.exe - Powered by Reason Core Security
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