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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:
14.7.25.0

MD5:
770199fdcdba79173bad60b5024b20dc

SHA-1:
18fec5e6ec2c72c05860c94df9be3ffbeaec8946

SHA-256:
3277a45679bb8b957ee7697280bfacf69cd9cb4cc97e1b870b8123a1dc9e8879

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:
4/24/2024 3:46:25 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien (M)
16.8.10.1

File size:
1016.8 KB (1,041,184 bytes)

Product version:
14.7.25.0

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}\downloads\1stbrowser.exe

Digital Signature
Signed by:
SIEN S.A.

Authority:
GlobalSign nv-sa

Valid from:
2/17/2015 3:45:29 AM

Valid to:
6/12/2016 1:20:39 AM

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:
7/9/2015 8:17:56 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
12288:Zh7Gf7PrXOFUIskm8m3Mg+y8B6xhCM+jTKci1SQPT/fxEX4g:Zho7TXOF/w8m85MhCM+CbROd

Entry address:
0x7EAD9

Entry point:
E8, A4, A7, 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, B0, 55, 00, 00, 6A, 16, 5E, 89, 30, E8, F5, AD, 00, 00, 8B, C6, EB, 53, 57, 8B, 7D, 10, 85, FF, 74, 14, 39, 75, 0C, 72, 0F, 56, 57, 50, E8, BF, 38, 00, 00, 83, C4, 0C, 33, C0, EB, 36, FF, 75, 0C, 6A, 00, 50, E8, 0D, 06, 00, 00, 83, C4, 0C, 85, FF, 75, 09, E8, 6F, 55, 00, 00, 6A, 16, EB, 0C, 39, 75, 0C, 73, 13, E8, 61, 55, 00, 00, 6A, 22, 5E, 89, 30, E8, A6, AD, 00, 00, 8B, C6...
 
[+]

Entropy:
6.5001

Code size:
678.5 KB (694,784 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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