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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:
S.I.E.N.  (signed by SIEN S.A.)

Product:
Installer

Version:
1.36.4.15

MD5:
251346dfecb3dfc28dd620216a58622e

SHA-1:
0ffd6228ca43ad3f0d43158dbfb20aaca394944e

SHA-256:
60c5e5828c992aefe138104a5d6131e91e8b7d8cc63dd63d8e4cf38e81cdfdee

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 also known as bundleware, or downloadware, which is an downloader designed to simply deliver ad-supported offers in the setup routine of an otherwise legitimate software.

Analysis date:
5/17/2024 5:28:50 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien (M)
17.3.15.23

File size:
2.4 MB (2,502,760 bytes)

Product version:
1.36.4.15

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:
1/19/2016 7:18:10 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

Entry address:
0x14BD03

Entry point:
E8, 33, 7B, 01, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 83, EC, 20, 56, 57, 6A, 08, 59, BE, 74, FC, 5B, 00, 8D, 7D, E0, F3, A5, 8B, 75, 0C, 8B, 7D, 08, 85, F6, 74, 13, F6, 06, 10, 74, 0E, 8B, 0F, 83, E9, 04, 51, 8B, 01, 8B, 70, 18, FF, 50, 20, 89, 7D, F8, 89, 75, FC, 85, F6, 74, 0C, F6, 06, 08, 74, 07, C7, 45, F4, 00, 40, 99, 01, 8D, 45, F4, 50, FF, 75, F0, FF, 75, E4, FF, 75, E0, FF, 15, C4, 42, 59, 00, 5F, 5E, 8B, E5, 5D, C2, 08, 00, 8B, 4D, F4, 64, 89, 0D, 00, 00, 00, 00, 59, 5F, 5F, 5E, 5B, 8B, E5, 5D, 51...
 
[+]

Entropy:
6.3716

Code size:
1.6 MB (1,649,152 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)

TCP (HTTP):
Connects to stats-182385724-1591972470.us-east-1.elb.amazonaws.com  (54.221.252.69:80)

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