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1stbrowser.exe

1stBrowser

SIEN SA

The application 1stbrowser.exe by SIEN SA has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat. It is set to automatically start when a user logs into Windows via the current user run registry key under the display name ‘1stbrowser’. This file is typically installed with the program 1stBrowser by Sien S.A..
Publisher:
The 1stBrowser Authors  (signed by SIEN SA)

Product:
1stBrowser

Version:
45.0.2454.161

MD5:
fbe60a705046c3eefb6750385e5aa88f

SHA-1:
cb7ab0ece96bbe5d542e17d7c74a55481b1f2cc9

SHA-256:
07c66477437daa011f9092976bb5dfcf4d0b30ea7c015f3da1a5aa0be438e705

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
4/19/2024 1:51:57 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien.SIENSA (M)
16.4.21.16

File size:
852.1 KB (872,568 bytes)

Product version:
45.0.2454.161

Copyright:
Copyright 2015 The 1stBrowser Authors. All rights reserved.

Original file name:
chrome.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\1stbrowser\application\1stbrowser.exe

Digital Signature
Signed by:
SIEN SA

Authority:
GlobalSign nv-sa

Valid from:
9/14/2015 2:05:56 PM

Valid to:
9/14/2016 2:05:56 PM

Subject:
CN=SIEN SA, O=SIEN SA, L=Paris, C=FR

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

Serial number:
11213DB3C4AD369B17F720086E1BBB7BB700

File PE Metadata
Compilation timestamp:
4/20/2016 9:16:35 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
12288:hlqf0IasEINm593V4vxCTm2boiybNoD2UEtQEkzsBrjMlbtaXy+7++UHOxYWR/2:hlrgYbHsX8aRu

Entry address:
0x42A54

Entry point:
E8, C0, 95, 00, 00, E9, 7F, FE, FF, FF, CC, CC, 8B, 44, 24, 08, 8B, 4C, 24, 10, 0B, C8, 8B, 4C, 24, 0C, 75, 09, 8B, 44, 24, 04, F7, E1, C2, 10, 00, 53, F7, E1, 8B, D8, 8B, 44, 24, 08, F7, 64, 24, 14, 03, D8, 8B, 44, 24, 08, F7, E1, 03, D3, 5B, C2, 10, 00, 55, 8B, EC, 83, EC, 14, 53, 56, 33, DB, 57, 8B, 7D, 08, 89, 5D, F8, 89, 5D, F4, 89, 5D, FC, 85, FF, 75, 18, E8, F0, 13, 00, 00, 6A, 16, 5E, 89, 30, E8, 83, D0, FF, FF, 8B, C6, 5F, 5E, 5B, 8B, E5, 5D, C3, 6A, 24, 68, FF, 00, 00, 00, 57, E8, BC, F9, FF, FF...
 
[+]

Code size:
368 KB (376,832 bytes)

Startup File (User Run)
Registry location:
HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

Name:
1stbrowser

Command:
"C:\users\{user}\appdata\local\1stbrowser\application\1stbrowser.exe" --location=0


The file 1stbrowser.exe has been discovered within the following programs.

1stBrowser  by Sien S.A.
About 3% of users remove it
 
Powered by Should I Remove It?

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

TCP (HTTP SSL):
Connects to ec2-23-23-112-220.compute-1.amazonaws.com  (23.23.112.220:443)

TCP (HTTP SSL):
Connects to a23-208-179-181.deploy.static.akamaitechnologies.com  (23.208.179.181:443)

TCP (HTTP SSL):
Connects to ec2-54-64-118-111.ap-northeast-1.compute.amazonaws.com  (54.64.118.111:443)

TCP (HTTP):
Connects to ec2-50-19-113-170.compute-1.amazonaws.com  (50.19.113.170:80)

TCP (HTTP SSL):
Connects to a23-208-197-109.deploy.static.akamaitechnologies.com  (23.208.197.109:443)

TCP (HTTP):
Connects to i0-h0-s1015.p12-sjc.cdngp.net  (174.35.6.20:80)

TCP (HTTP SSL):
Connects to ec2-52-73-178-249.compute-1.amazonaws.com  (52.73.178.249:443)

TCP (HTTP SSL):
Connects to s3-1-w.amazonaws.com  (52.216.225.24:443)

TCP (HTTP SSL):
Connects to a23-15-187-24.deploy.static.akamaitechnologies.com  (23.15.187.24:443)

TCP (HTTP):
Connects to i0-h0-s1022.p12-sjc.cdngp.net  (174.35.6.73:80)

TCP (HTTP):
Connects to i0-h0-s1012.p12-sjc.cdngp.net  (174.35.6.17:80)

TCP (HTTP SSL):
Connects to a23-205-124-8.deploy.static.akamaitechnologies.com  (23.205.124.8:443)

TCP (HTTP):
Connects to r200-40-3-208.antel.net.uy  (200.40.3.208:80)

TCP (HTTP SSL):
Connects to server-52-84-174-110.gru50.r.cloudfront.net  (52.84.174.110:443)

TCP (HTTP):
Connects to i0-h0-s1035.p12-sjc.cdngp.net  (174.35.6.86:80)

TCP (HTTP SSL):
Connects to server-52-84-174-28.gru50.r.cloudfront.net  (52.84.174.28:443)

TCP (HTTP):
Connects to ec2-54-225-218-109.compute-1.amazonaws.com  (54.225.218.109:80)

TCP (HTTP):
Connects to ec2-52-55-12-167.compute-1.amazonaws.com  (52.55.12.167:80)

TCP (HTTP SSL):
Connects to ec2-34-192-126-103.compute-1.amazonaws.com  (34.192.126.103:443)

TCP (HTTP):
Connects to ec2-107-23-60-50.compute-1.amazonaws.com  (107.23.60.50:80)

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