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squirrelwebsetup.exe

squirrelweb

This is the installer and setup program from the squirrelweb branded Yontoo adware web browser extension. This adware injects various forms of advertisements in the user's web browser based on the HTML content and URLs viewed. Ad include banners, in-line context text links, coupons, and search. The program will install an auto-updating Windows service that will update the software with additional features. The application squirrelwebsetup.exe by squirrelweb has been detected as adware by 3 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer.
Publisher:
squirrelweb  (signed and verified)

MD5:
1138c95f6a00fb56143557a8a549c7dc

SHA-1:
44911c13279b7077f78307fcf41b6c6a6e5f3837

SHA-256:
13f72e5e1e69ae1042336554689f5ed46be720da59e73bd2f3378400f9cba423

Scanner detections:
3 / 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:
4/24/2024 3:25:55 AM UTC  (today)

Scan engine
Detection
Engine version

Malwarebytes
PUP.Optional.Squirrelweb.A
v2013.12.22.10

Reason Heuristics
PUP.Installer.squirrelweb.Q
14.8.8.0

Rising Antivirus
NS:PUF.SilenceInstaller!1.9DDF
23.00.65.131220

File size:
226.3 KB (231,768 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

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

Digital Signature
Signed by:
squirrelweb

Authority:
VeriSign, Inc.

Valid from:
10/7/2013 10:30:00 AM

Valid to:
10/8/2014 10:29:59 AM

Subject:
CN=squirrelweb, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=squirrelweb, L=San Diego, S=California, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
7244DFB846B028B3B64BA8B4A757EAA4

File PE Metadata
Compilation timestamp:
12/6/2009 9:22:01 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
6144:cZ+119E+bVTCPUn+1rG353/1RWBT5AYZm/G/HcW:J/bVTCPUIyt1s15AB/G/8W

Entry address:
0x30CB

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 38, 6F, 44, 00, E8, F1, 2B, 00, 00, A3, 84, 6E, 44, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, 9C, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 2E, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, F0, 46, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9153

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

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

http://secure.rocketdlgo.com/.../SquirrelWebSetup.exe

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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