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bc80d13d-65af-4a8c-84eb-b473a91363b0.exe

1stBrowser Installer

SIEN S.A.

This is the SIEN AppScion Installer which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed with minimal consent. The application bc80d13d-65af-4a8c-84eb-b473a91363b0.exe 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 program is a setup application that uses the SIEN SuperInstall installer. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from vzbucket.go.im.
Publisher:
The 1stBrowser Authors  (signed by SIEN S.A.)

Product:
1stBrowser Installer

Version:
39.0.2132.32

MD5:
12e4f8b7bef2d3ec318aeca37ff72a77

SHA-1:
00155adcf143252441a74e8fc900019234a65636

SHA-256:
eecb4f9b180bc2a219aa806a491aad03d6c21ef7b273394b0d004bb621a792ac

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.

Description:
This is also known as bundleware, or downloadware, which is an downloader designed to simply deliver ad-supported offers in the setup routine of an otherwise legitimate software.

Analysis date:
5/1/2024 1:00:20 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Sien.SIENSA.Bundler (M)
16.4.4.22

File size:
37.3 MB (39,143,032 bytes)

Product version:
39.0.2132.32

Copyright:
Copyright 2014 The 1stBrowser Authors. All rights reserved.

File type:
Executable application (Win32 EXE)

Bundler/Installer:
SIEN SuperInstall

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\bc80d13d-65af-4a8c-84eb-b473a91363b0.exe

Digital Signature
Signed by:
SIEN S.A.

Authority:
GlobalSign nv-sa

Valid from:
2/17/2015 7:45:29 PM

Valid to:
6/12/2016 4:20:39 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:
6/17/2015 12:21:12 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
786432:bpUqC/Satbb9RAxe0fN5HZmdqN5D2rqGcfMTrg/i9w74qo+bLo:bpOVtbBR6eS8OD68/e+Po

Entry address:
0x21AD

Entry point:
6A, 00, FF, 15, A4, 40, 40, 00, 50, E8, F2, 08, 00, 00, 59, 50, FF, 15, 90, 40, 40, 00, CC, 55, 8B, EC, 81, EC, 14, 02, 00, 00, 53, 56, 8B, 75, 14, 85, F6, 0F, 84, BE, 00, 00, 00, FF, 75, 08, 8D, 4D, F8, FF, 75, 0C, FF, 75, 10, E8, BF, 0C, 00, 00, 8D, 4D, F8, E8, DC, 0C, 00, 00, 84, C0, 0F, 84, 9D, 00, 00, 00, 8D, 4D, F8, E8, D4, 0C, 00, 00, 83, F8, 01, 0F, 82, 8C, 00, 00, 00, 8D, 4D, F8, E8, C3, 0C, 00, 00, 3B, 05, 98, 15, 40, 00, 77, 7C, FF, 36, 33, C0, BB, 04, 01, 00, 00, 66, 89, 45, F4, 66, 89, 85, EC...
 
[+]

Entropy:
8.0000

Packer / compiler:
FASM v1.3x

Code size:
8 KB (8,192 bytes)

The file bc80d13d-65af-4a8c-84eb-b473a91363b0.exe has been seen being distributed by the following URL.

http://vzbucket.go.im/6ae76ba4-7119-45c8-94ed-52f23abece69/build/.../bc80d13d-65af-4a8c-84eb-b473a91363b0.exe

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