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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 runs as a scheduled task under the Windows Task Scheduler named 1stbrowser. This file is typically installed with the program 1stBrowser by Sien S.A.. While running, it connects to the Internet address 247.bm-nginx-loadbalancer.mgmt.fra1.adnexus.net on port 80 using the HTTP protocol.
Publisher:
The 1stBrowser Authors  (signed by SIEN SA)

Product:
1stBrowser

Version:
45.0.2454.172

MD5:
e4d53ee6144fd00f444f1351a4b44f64

SHA-1:
c6f529f6035c3c8dc15b8b616387562fa79df276

SHA-256:
374490187613f6d2e60d6a46a4cf8a6f30eb2e30a7b67de8a566a7235e0480e6

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
4/25/2024 2:46:19 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien (M)
16.11.16.17

File size:
852.1 KB (872,576 bytes)

Product version:
45.0.2454.172

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:
6/6/2016 8:20:17 AM

Valid to:
6/7/2017 8:20:17 AM

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:
1121854422706CE0F08C49817C88B651891F

File PE Metadata
Compilation timestamp:
11/14/2016 1:29:48 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
12288:jlqf0IasEINm593V4vxCTm2boiybNoD2UEtQEkzsBrjMlb2aXy+Q++UHOxYCRn:jlrgYbHTXr2Rn

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)

Scheduled Task
Task name:
1stbrowser

Trigger:
Registration (Runs on registration)


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

1stBrowser  by Sien S.A.
About 3% of users remove it
 
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The executing file has been seen to make the following network communications in live environments.

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

TCP (HTTP SSL):
Connects to wb-in-f155.1e100.net  (66.102.1.155:443)

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

TCP (HTTP):
Connects to ec2-52-207-48-5.compute-1.amazonaws.com  (52.207.48.5:80)

TCP (HTTP SSL):
Connects to ec2-50-19-113-170.compute-1.amazonaws.com  (50.19.113.170:443)

TCP (HTTP):
Connects to a23-67-129-200.deploy.static.akamaitechnologies.com  (23.67.129.200:80)

TCP (HTTP):
Connects to 247.bm-nginx-loadbalancer.mgmt.fra1.adnexus.net  (37.252.172.42:80)

TCP (HTTP SSL):
Connects to server-54-230-59-96.gru1.r.cloudfront.net  (54.230.59.96:443)

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