installer_yahoo_messenger_french.exe

ISfreemium

The file is a bundle distribution and utilizes the installCore download manager to distribute this potentially unwanted software. The application installer_yahoo_messenger_french.exe by ISfreemium has been detected as adware 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 telechargers.net.
Publisher:
ISfreemium  (signed and verified)

MD5:
a9e25c01a5afcae9ad2be6d470fea355

SHA-1:
d6c4910594ab1a1b529b46c782f4ff63efa05313

SHA-256:
0d6401ca34723fee7a1f4f3699b7da3426d3be45bf052bb619fc20aaac57ae93

Scanner detections:
1 / 68

Status:
Adware

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:
8/18/2018 7:22:00 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.installCore.ISfreemi (M)
16.5.21.5

File size:
681.8 KB (698,144 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

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

Digital Signature
Signed by:

Authority:
COMODO CA Limited

Valid from:
7/3/2013 2:00:00 AM

Valid to:
7/4/2014 1:59:59 AM

Subject:
CN=ISfreemium, O=ISfreemium, STREET=63 Rothschild 63 BV, L=Tel-Aviv, S=N/A, PostalCode=65785, C=IL

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

Serial number:
009B517CAF08AA1A85822DB0CE5E9169FE

File PE Metadata
Compilation timestamp:
6/20/1992 12:22:17 AM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:IaQyMJfsGj2TUtL36eClBrNTdod7swsGcR/juS8kLvpFeMwCKgpG0bUQO:IaQyMJfsU2TeL31qBrJddNRLuSPFojox

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...
 
[+]

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

Code size:
36 KB (36,864 bytes)

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

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