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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. This is a setup program which is used to install the application. 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.. The file has been seen being downloaded from openload.co and multiple other hosts. While running, it connects to the Internet address 189-76-142-72.ntelecom.com.br on port 80 using the HTTP protocol.
Publisher:
The 1stBrowser Authors  (signed by SIEN SA)

Product:
1stBrowser

Version:
45.0.2454.167

MD5:
6be4c974467a8117c9c6d177c0b8ec91

SHA-1:
ff77a626698b7382370b933a13ebf37d6c1b700f

SHA-256:
c114e90142e0055bca0d8a1f8fef05b4e359b2cb82d46d71a20db342c928aa6d

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
11/26/2024 10:07:35 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien.SIENSA (M)
16.5.11.19

File size:
852.1 KB (872,568 bytes)

Product version:
45.0.2454.167

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:
5/10/2016 5:44:42 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
12288:clqf0IasEINm593V4vxCTm2boiybNoD2UEtQEkzsBrjMlbxaXy+J++UHOxYaRA9:clrgYbHIXSuRI

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 programs.

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

The file 1stbrowser.exe has been seen being distributed by the following 2 URLs.

https://openload.co/.../Frm9NCAL4-g~1470246313~186.125.0.0~-EXxL0N8

https://dl-mail.ymail.com/ws/download/mailboxes/@.id==VjJ-bzrBi6UWgUbyh12gmDWL1bjKsEsn2ClRWHSmObrUNre7lXiudZiUJ1G9Q4tkJX8U-OZtZrw2rULBXQ-scIJXZQ/messages/@.id==AAN3w0MAEZRWV_uTbgnAGCI0QU4/content/parts/@.id==2/raw?appid=YahooMailNeo&ymreqid=640507aa-4133-9618-015a-c5005e010000&token=zitEzqOML3j84e6ealFTT5U7-km5qEQF52lp7AcCuBZOsDvyIUm5QvMm8lkdVTn8EzUsPd9QBsU4hzr5pNTkAODtbetMcWSCWFFU_lefl1M6y0cZDZK87O4GU8LnZAz6&error=https://mg.mail.yahoo.com/.../iframemsg?id=cb996e35-badf-a30f-ed67-dfed395fe6bf

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

TCP (HTTP SSL):
Connects to xx-fbcdn-shv-01-gru2.fbcdn.net  (31.13.85.4:443)

TCP (HTTP SSL):
Connects to edge-star-mini-shv-01-gru2.facebook.com  (31.13.85.36:443)

TCP (HTTP SSL):
Connects to edge-video-shv-01-gru2.fbcdn.net  (31.13.85.15:443)

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

TCP (HTTP):
Connects to i0-h0-s4.p0-gig.cdngp.net  (174.35.87.69:80)

TCP (HTTP):
Connects to i0-h0-s1056.p0-mia.cdngp.net  (174.35.36.89:80)

TCP (HTTP):
Connects to i0-h0-s1045.p0-mia.cdngp.net  (174.35.36.78:80)

TCP (HTTP):
Connects to i0-h0-s1006.p0-mia.cdngp.net  (174.35.36.11:80)

TCP (HTTP):
Connects to i0-h0-s2.p0-gig.cdngp.net  (174.35.87.67:80)

TCP (HTTP SSL):
Connects to edge-z-m-mini-shv-01-gru2.facebook.com  (31.13.85.37:443)

TCP (HTTP SSL):
Connects to edge-atlas-shv-01-gru2.facebook.com  (31.13.85.1:443)

TCP (HTTP SSL):
Connects to edge-star-shv-01-gru2.facebook.com  (31.13.85.8:443)

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

TCP (HTTP SSL):
Connects to server-52-84-174-242.gru50.r.cloudfront.net  (52.84.174.242:443)

TCP (HTTP SSL):
Connects to edge-star-mini-shv-02-gru2.facebook.com  (157.240.12.35:443)

TCP (HTTP SSL):
Connects to cache.google.com  (179.97.41.53:443)

TCP (HTTP SSL):
Connects to a23-10-247-57.deploy.static.akamaitechnologies.com  (23.10.247.57:443)

TCP (HTTP):
Connects to 189-76-142-72.ntelecom.com.br  (189.76.142.72:80)

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