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skypesetup.exe

Secure Installer

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application skypesetup.exe by Secure Installer 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 installCore installer. The file has been seen being downloaded from download.downloadzone.org a web site host known to distribute potentially unwanted software operated by Quick Downloader.
Publisher:
Secure Installer  (signed and verified)

MD5:
6b714f7b777974e6cbcc7d802744a404

SHA-1:
862883da3e2824d9f942208149f2126f93545c92

SHA-256:
efddb9056b5a48d40021549b8fa5ff49634bb2fce337051858f4d10b52e558d2

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 an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
4/19/2024 12:40:15 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.installCore (M)
16.7.20.10

File size:
593.1 KB (607,368 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

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

Digital Signature
Signed by:
Secure Installer

Authority:
COMODO CA Limited

Valid from:
9/25/2012 5:30:00 AM

Valid to:
9/26/2013 5:29:59 AM

Subject:
CN=Secure Installer, O=Secure Installer, STREET=720 Market Street, STREET=5th floor, L=San Francisco, S=CA, PostalCode=94102, C=US

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
00C3507C1ADDE6B4C52E5426990F85CA2B

File PE Metadata
Compilation timestamp:
6/20/1992 3:52:17 AM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:fHyMJfs8dPOrwVJfGGhp8QTxFmyJd5jiOVBv23G2a4aezG:vyMJfskWruJfFp9ay75zO3G2a4bC

Entry address:
0x98CC

Entry point:
55, 8B, EC, 83, C4, CC, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, FA, 97, FF, FF, E8, 01, AA, FF, FF, E8, 2C, CC, FF, FF, E8, 73, CC, FF, FF, E8, 0A, F3, FF, FF, E8, 71, F4, FF, FF, 33, C0, 55, 68, 76, 9F, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 2C, 9F, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, B0, 40, 00, E8, 9B, FE, FF, FF, E8, 26, FA, FF, FF, 8D, 55, F0, 33, C0, E8, E0, D0, FF, FF, 8B, 55, F0, B8, D8, BD, 40, 00, E8, AB, 98, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, D8, BD, 40, 00, B2, 01, B8...
 
[+]

Entropy:
7.7618

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

Code size:
36 KB (36,864 bytes)

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

http://download.downloadzone.org/download.php?id=0be7bb8584e0b36ea82967226eb6e5315ad9374c&z=0&p=eyJweSI6ImR6IiwicnMiOiJnIiwicnQiOiJzIiwiYyI6ImluIiwibyI6IndpbjciLCJiIjoiY2gyOCIsInVfaWQiOiJkel81MWYyOTdlYTIxYjVlOS40MzU1NDg1NCIsInBhX2lkIjoiMCIsInN0X2lkIjoiMCIsInNwX2lkIjoiMDAwMC0wMTA1IiwidHMiOjEzNzQ4NTMwOTgsImt3IjpudWxsLCJjdSI6bnVsbCwiY2EiOm51bGx9

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