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google_chrome_setup.exe

Kosos

Download Jet

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application google_chrome_setup.exe, “Kosos Setup ” by Download Jet 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. With this installer, users are expecting to download Google's Chrome web browser but before that occurs they may be presented with additional offers, mostly potentially unwanted software or adware.
Publisher:
Download Jet  (signed and verified)

Product:
Kosos

Description:
Kosos Setup

MD5:
8fd80d6edb97b1a071000f14c203c00f

SHA-1:
0fe8d5a177f44b1c1e2a92d05e3c8311ff2fdc05

SHA-256:
56df98b9aad7476751a849a1ff9ff005fb54ef1556b45b4dea004c118fda1951

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:
4/29/2024 4:48:25 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.installCore (M)
17.3.12.5

File size:
1.1 MB (1,110,872 bytes)

Product version:
3.3.2

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\google_chrome_setup.exe

Digital Signature
Signed by:
Download Jet

Authority:
COMODO CA Limited

Valid from:
1/14/2015 4:00:00 PM

Valid to:
1/14/2017 3:59:59 PM

Subject:
CN=Download Jet, O=Download Jet, STREET="500 Westover Drive #6502", L=Sanford, S=NC, PostalCode=27330, C=US

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

Serial number:
71A3B4CEFFECF361AB11477318001135

File PE Metadata
Compilation timestamp:
6/19/1992 3:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

Entry address:
0x9C40

Entry point:
55, 8B, EC, 83, C4, C4, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, 86, 94, FF, FF, E8, 8D, A6, FF, FF, E8, 1C, A9, FF, FF, E8, BF, A9, FF, FF, E8, 5E, C9, FF, FF, E8, C9, F2, FF, FF, E8, 30, F4, FF, FF, 33, C0, 55, 68, FC, A2, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, C5, A2, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, C0, 40, 00, E8, 96, FE, FF, FF, E8, C9, FA, FF, FF, 8D, 55, F0, 33, C0, E8, 83, CF, FF, FF, 8B, 55, F0, B8, 24, CE, 40, 00, E8, 32, 95, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, 24, CE...
 
[+]

Entropy:
7.9048

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

Code size:
37 KB (37,888 bytes)

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

http://www.repositorygiftchuckle.com/c?x=1ITAOIabtLtDPUqI8wAoZALk4caFI SVuati8qs2VXo=&c=yZk/VZ13Jz4qSVuuQzxUC45dGAqxOscb4BSbCGqzUV5RKOY7aI V8mCgCWfxtCHEB/t1pnHFmWFO53jolLFy2iIW4JOkmfPwxqAI2VCcy9sQ9xioPT4owpeXwm8IFb7E&downloadAs=Google_Chrome_Setup.exe&fallback_url=https://s3-eu-west-1.amazonaws.com/.../ChromeSetup.exe

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