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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. 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.I.E.N  (signed by SIEN SA)

Product:
Installer

Version:
4.7.2.14

MD5:
94b7718747d6fe025e15e2bffe628bd9

SHA-1:
b2810ab6e76e4517e845529164d6c3c49ff7c530

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
5/4/2024 8:10:04 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien (M)
16.8.7.13

File size:
2.4 MB (2,507,880 bytes)

Product version:
4.7.2.14

Copyright:
Copyright (C) 2015

Original file name:
Installer.exe

File type:
Executable application (Win32 EXE)

Language:
English (United States)

Common path:
C:\Documents and Settings\{user}\My documents\downloads\1stbrowser.exe

Digital Signature
Signed by:
SIEN SA

Authority:
GlobalSign nv-sa

Valid from:
9/14/2015 8:05:56 AM

Valid to:
9/14/2016 8:05:56 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:
2/9/2016 8:23:25 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
49152:3Thut8MbTgCkmLrLEuHkgIq6boIWnM8fHyPqsFdqagaOsWJsa9O6vES6Xg4:Dwt8MbTjkm7EuHkbq68FHyPqsCagaOsT

Entry address:
0x1354F3

Entry point:
E8, 44, 7B, 01, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 83, EC, 20, 56, 57, 6A, 08, 59, BE, 74, 0C, 5C, 00, 8D, 7D, E0, F3, A5, 8B, 75, 0C, 8B, 7D, 08, 85, F6, 74, 13, F6, 06, 10, 74, 0E, 8B, 0F, 83, E9, 04, 51, 8B, 01, 8B, 70, 18, FF, 50, 20, 89, 7D, F8, 89, 75, FC, 85, F6, 74, 0C, F6, 06, 08, 74, 07, C7, 45, F4, 00, 40, 99, 01, 8D, 45, F4, 50, FF, 75, F0, FF, 75, E4, FF, 75, E0, FF, 15, C4, 52, 59, 00, 5F, 5E, 8B, E5, 5D, C2, 08, 00, 8B, 4D, F4, 64, 89, 0D, 00, 00, 00, 00, 59, 5F, 5F, 5E, 5B, 8B, E5, 5D, 51...
 
[+]

Entropy:
6.3727

Code size:
1.6 MB (1,653,248 bytes)

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

http://www.softonic.com/sads/tracker.php?ev=c&co=DO&sid=05d9c023cac43a31c8e894239b4d0caf&upv=b7a600c5d6d8019718c53d92770f323c&z=results&sk=0&abp=0&params=F24F8F4D368AFA5D32C8A90D9EFD1CBABA9D00FFBB6651DF46D4F1DC9B67DA69683A80013FDA78C29A9609FEC7B16FA94C912D11638E44F9E732030AE7E6F3FCFE38BC2A9D36481CBB78AEA814FBDC1E4474BFD4B7DD2A45F76D870F90F05AC6A4A8C219E98B0FDB31A3898796C351357A942D6CAD6FEB2C58F5E8C62FA474C2DEEBEEEAF7F213BF6EB17CC720B356825E8DCF0B6BD66EF09215C24EA58657805306EF40F9D10F4D7FA926B9704767B6&h=037102B18ABE297539A4E018707ED5C533015BF67F05ADAEBEC6CD0EEBE7738E&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)

TCP (HTTP):
Connects to stats-182385724-1591972470.us-east-1.elb.amazonaws.com  (54.221.252.69:80)

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