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1stbrowser.exe

Installer

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 self-extracting archive and installer and has been known to bundle potentially unwanted software. The file has been seen being downloaded from www.softonic.com. While running, it connects to the Internet address www.ibbalance.com on port 443.
Publisher:
S  (signed by SIEN SA)

Product:
Installer

Version:
4.21.4.1

MD5:
7942f4a86c21e7602e222cd3465a7ac6

SHA-1:
634d84a943a27fe97be2981cc4bf63b17395e984

SHA-256:
ea95aa0fe0437a38bbe8ab1effbcdff88abffb0f0be772cb78c5b148c8c05899

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
5/5/2024 6:01:39 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien (M)
16.8.3.15

File size:
2.1 MB (2,211,944 bytes)

Product version:
4.21.4.1

Copyright:
Copyright (C) 2016

Original file name:
Installer.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\users\{user}\downloads\1stbrowser.exe

Digital Signature
Signed by:
SIEN SA

Authority:
GlobalSign nv-sa

Valid from:
9/14/2015 7:05:56 AM

Valid to:
9/14/2016 7:05:56 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:
11213DB3C4AD369B17F720086E1BBB7BB700

File PE Metadata
Compilation timestamp:
5/19/2016 8:05:17 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
14.0

CTPH (ssdeep):
49152:cTVpfC01iCaPUUlCAaLXLWUG6R6Gdc7B0i5as9ttmnxlRHO4/5XkSaK/F0oyOdKR:cTVpK013QUgCFXLzG6RG35X5mnxlRHOV

Entry address:
0x1320E4

Entry point:
E8, 6F, 08, 00, 00, E9, 80, FE, FF, FF, 8B, 4D, F4, 64, 89, 0D, 00, 00, 00, 00, 59, 5F, 5F, 5E, 5B, 8B, E5, 5D, 51, F2, C3, 8B, 4D, F0, 33, CD, F2, E8, 5A, F5, FF, FF, F2, E9, DA, FF, FF, FF, 8B, 4D, EC, 33, CD, F2, E8, 49, F5, FF, FF, F2, E9, C9, FF, FF, FF, 50, 64, FF, 35, 00, 00, 00, 00, 8D, 44, 24, 0C, 2B, 64, 24, 0C, 53, 56, 57, 89, 28, 8B, E8, A1, 14, 21, 5F, 00, 33, C5, 50, FF, 75, FC, C7, 45, FC, FF, FF, FF, FF, 8D, 45, F4, 64, A3, 00, 00, 00, 00, F2, C3, 50, 64, FF, 35, 00, 00, 00, 00, 8D, 44, 24...
 
[+]

Code size:
1.6 MB (1,635,840 bytes)

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

http://www.softonic.com/sads/tracker.php?ev=c&co=BO&sid=e81fa1ab15b7e3a00bf80e385c36fdac&upv=0e657c3d7f38578032b65f308da77c2f&z=results&sk=0&abp=0&params=F24F8F4D368AFA5D32C8A90D9EFD1CBABA9D00FFBB6651DF46D4F1DC9B67DA692A91E92EDDB6AEE2F0982802DAB311473B896C280841E4A0A12462B779BE6A45047FF42F6E0B624681E5F5D8E2CE6F611C8558F64D6E3058088C96B35134A1B1765788AD724C78FC87AF2B530E2A6BE05CB24E86829B5322910B5DF0D057E71344FC859B4796EE88406BA84E2E8CF6FE1A9923BB9A37B7318FA1155041C1C98EBED6B04821A8166B07EF5492ADF0D35D&h=4449344948D8EBB4C9E2C578FE029D1FDF2A33D01065C47B8C2C219FEE683BDC&directdownload=1&f=69711749&d=http://.../1SfX5jL

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

TCP (HTTP):
Connects to www.softologic.com  (174.37.181.31:80)

TCP (HTTP SSL):
Connects to www.ibbalance.com  (173.192.190.227:443)

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