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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 onedrive.live.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:
4.12.4.1

MD5:
f40f5bffcf23ad6ade133c5b6d5be46b

SHA-1:
acc5c0eba7856e731618ef9d9184b0bd2073b8f5

SHA-256:
e4394f36c729b724eef5b07525817a1fcd8d8824d807fc8f04fe0a777812c94e

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
4/16/2024 3:00:03 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien (M)
16.8.7.21

File size:
2.4 MB (2,514,536 bytes)

Product version:
4.12.4.1

Copyright:
Copyright (C) 2015

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:
3/17/2016 8:41:44 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
49152:UzMANuSZdRhvjdtidtYSxB2ACJFDifQQ7z2i6t4ZaeqtG3cb0zox/DpO6Hwx:UoANuSZdXvvidmSiACsQQ7ii6tmfqtGn

Entry address:
0x1354E3

Entry point:
E8, 64, 7B, 01, 00, E9, 7F, FE, FF, FF, 55, 8B, EC, 83, EC, 20, 56, 57, 6A, 08, 59, BE, 0C, 0D, 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...
 
[+]

Code size:
1.6 MB (1,652,736 bytes)

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

https://onedrive.live.com/.../SrlKtOMJus=6&ithint=.exe

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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