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yahoo-toolbar_8.5.3.16.exe

Muf

Sivensys SRL

The application yahoo-toolbar_8.5.3.16.exe, “Muf Setup ” by Sivensys SRL 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 Inno Setup installer. The setup program uses the InstallCore engine which may bundle additional software offers including toolbars and browser extensions. While running, it connects to the Internet address server-54-230-141-233.sfo5.r.cloudfront.net on port 80 using the HTTP protocol.
Publisher:
Sivensys SRL  (signed and verified)

Product:
Muf

Description:
Muf Setup

Version:
3.1.3.0

MD5:
a14c6f3cdd6179d1d6bb06e51ead979d

SHA-1:
a64afd3fd230d80bbf0dcb23cfa15d5e7188c8f7

SHA-256:
f613d399c49c6fd71b246476095c5df028a27f2de748a991cad1fdc599651c66

Scanner detections:
1 / 68

Status:
Potentially unwanted

Explanation:
Uses the InstallCore download manager to install additional potentially unwanted software which may include extensions such as DealPly and various toolbars.

Analysis date:
4/26/2024 6:46:01 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.InstallCore.CSH (L)
17.2.23.15

File size:
1.2 MB (1,299,912 bytes)

Product version:
1.0.9

File type:
Executable application (Win32 EXE)

Installer:
Inno Setup

Common path:
C:\users\{user}\downloads\yahoo-toolbar_8.5.3.16.exe

Digital Signature
Signed by:
Sivensys SRL

Authority:
GlobalSign nv-sa

Valid from:
10/20/2016 9:04:57 AM

Valid to:
10/21/2017 9:04:57 AM

Subject:
CN=Sivensys SRL, O=Sivensys SRL, L=IASI, C=RO

Issuer:
CN=GlobalSign CodeSigning CA - SHA256 - G3, O=GlobalSign nv-sa, C=BE

Serial number:
0D38E905F0B0BA5733036DFB

File PE Metadata
Compilation timestamp:
6/19/1992 11:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

Entry address:
0xAA98

Entry point:
55, 8B, EC, 83, C4, C4, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, 2E, 86, FF, FF, E8, 35, 98, FF, FF, E8, 9C, 9B, FF, FF, E8, B7, 9F, FF, FF, E8, 56, BF, FF, FF, E8, ED, E8, FF, FF, E8, 54, EA, FF, FF, 33, C0, 55, 68, 69, B1, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 32, B1, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, D0, 40, 00, E8, 26, F5, FF, FF, E8, 11, F1, FF, FF, 80, 3D, 34, C2, 40, 00, 00, 74, 0C, E8, 23, F6, FF, FF, 33, C0, E8, 24, 93, FF, FF, 8D, 55, F0, 33, C0, E8, 66, C5, FF, FF, 8B, 55...
 
[+]

Packer / compiler:
Inno Setup v5.x - Installer Maker

Code size:
40.5 KB (41,472 bytes)

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

TCP (HTTP SSL):
Connects to generic.external.zlb.scl3.mozilla.com  (63.245.213.12:443)

TCP (HTTP):
Connects to ec2-52-50-196-247.eu-west-1.compute.amazonaws.com  (52.50.196.247:80)

TCP (HTTP):
Connects to ec2-54-154-190-87.eu-west-1.compute.amazonaws.com  (54.154.190.87:80)

TCP (HTTP):
Connects to ec2-52-49-170-39.eu-west-1.compute.amazonaws.com  (52.49.170.39:80)

TCP (HTTP):
Connects to ec2-52-214-247-42.eu-west-1.compute.amazonaws.com  (52.214.247.42:80)

TCP (HTTP):
Connects to ec2-52-206-2-43.compute-1.amazonaws.com  (52.206.2.43:80)

TCP (HTTP):
Connects to 92b91b2d.rdns.100tb.com  (146.185.27.45:80)

TCP (HTTP):
Connects to server-54-230-141-233.sfo5.r.cloudfront.net  (54.230.141.233:80)

TCP (HTTP):
Connects to server-54-192-19-175.iad12.r.cloudfront.net  (54.192.19.175:80)

TCP (HTTP):
Connects to s3-1-w.amazonaws.com  (54.231.81.32:80)

TCP (HTTP):
Connects to ec2-54-186-117-168.us-west-2.compute.amazonaws.com  (54.186.117.168:80)

TCP (HTTP):
Connects to ec2-52-26-136-207.us-west-2.compute.amazonaws.com  (52.26.136.207:80)

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