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3844998_setup.exe

Hoolapp

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application 3844998_setup.exe by Hoolapp 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 Inno Setup installer. It is also typically executed from the user's temporary directory. While running, it connects to the Internet address api.yontoo.com on port 80 using the HTTP protocol.
Publisher:
Hoolapp  (signed and verified)

MD5:
d892c06e41d39bb34d3f517e4cdb63a9

SHA-1:
4574c1c8fe5e2ebec0316a087304c77d6a24b9b7

SHA-256:
40d01503a35fdfae920a4e8f917e1ea4cbadd2259d907f6cfda78c329ea99c2e

Scanner detections:
1 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
4/25/2024 7:36:56 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.Hoolapp.Installer (M)
16.4.26.8

File size:
685 KB (701,488 bytes)

File type:
Executable application (Win32 EXE)

Installer:
Inno Setup

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\3844998_setup.exe

Digital Signature
Signed by:
Hoolapp

Authority:
COMODO CA Limited

Valid from:
11/19/2012 6:00:00 PM

Valid to:
11/20/2015 5:59:59 PM

Subject:
CN=Hoolapp, O=Hoolapp, STREET=63 Rothschild Blvd., L=Tel-Aviv, S=NA, PostalCode=65785, C=IL

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

Serial number:
1205B27293082834E7A5D38AE9D121B7

File PE Metadata
Compilation timestamp:
6/19/1992 5:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:7kOyMJfsKmxCPC2QNeqtAYI+xTtSOBY/fq+5zrVKFh7SutWfgaqhGV6a/:gOyMJfspiCVtAYJTUvqQ290fgaqyv

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:
7.7818

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

Code size:
36 KB (36,864 bytes)

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

TCP (HTTP):
Connects to wac.edgecastcdn.net  (72.21.81.13:80)

TCP (HTTP):
Connects to service.yontoo.com  (8.25.35.148:80)

TCP (HTTP):
Connects to api.yontoo.com  (8.25.35.15:80)

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