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1stbrowser.exe

SienBrowser

SIEN S.A.

The application 1stbrowser.exe, “SIEN Browser Installer” 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 file has been seen being downloaded from stapibrowser.iminent.com.
Publisher:
SIEN  (signed by SIEN S.A.)

Product:
SienBrowser

Description:
SIEN Browser Installer

Version:
2.37.1.0

MD5:
2fcc3663cda398d837f27b9f2dd1fab7

SHA-1:
0e540f06488d15a634668ff81c82228c55620de5

SHA-256:
9485db34ab90dc0001087a7b2e64e8634ee2705ceeb61af458a403784d2c92da

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.

Analysis date:
5/17/2024 9:53:14 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien (M)
17.2.25.12

File size:
990.9 KB (1,014,696 bytes)

Product version:
2.37.1.0

Copyright:
(c)SIEN S.A. All rights reserved.

Original file name:
Setup.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\inetcache\ie\{random}\1stbrowser.exe

Digital Signature
Signed by:
SIEN S.A.

Authority:
GlobalSign nv-sa

Valid from:
2/17/2015 6:45:29 PM

Valid to:
6/12/2016 3:20:39 PM

Subject:
E=support@sien.com, 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:
112158A643D1C958507AAB7FE826772BFA60

File PE Metadata
Compilation timestamp:
9/7/2015 2:37:42 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

Entry address:
0x7C82C

Entry point:
E8, 61, A5, 00, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 56, 8B, 75, 14, 85, F6, 75, 04, 33, C0, EB, 6D, 8B, 45, 08, 85, C0, 75, 13, E8, 2D, 51, 00, 00, 6A, 16, 5E, 89, 30, E8, B2, AB, 00, 00, 8B, C6, EB, 53, 57, 8B, 7D, 10, 85, FF, 74, 14, 39, 75, 0C, 72, 0F, 56, 57, 50, E8, BC, 38, 00, 00, 83, C4, 0C, 33, C0, EB, 36, FF, 75, 0C, 6A, 00, 50, E8, DA, 06, 00, 00, 83, C4, 0C, 85, FF, 75, 09, E8, EC, 50, 00, 00, 6A, 16, EB, 0C, 39, 75, 0C, 73, 13, E8, DE, 50, 00, 00, 6A, 22, 5E, 89, 30, E8, 63, AB, 00, 00, 8B, C6...
 
[+]

Entropy:
6.4918

Code size:
664.5 KB (680,448 bytes)

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

http://stapibrowser.iminent.com/IminentBrowser/.../setup.exe

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