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skywebber_wd.exe

Skywebber

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application skywebber_wd.exe by Skywebber has been detected as adware by 8 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from www.windows-7-themes.com and multiple other hosts.
Publisher:
Skywebber  (signed and verified)

MD5:
4fa7210aff75c0d4b6dbd6b41d36cba9

SHA-1:
8d69e18f1892745a3477d65d5747e1413f2090bc

SHA-256:
93a0a514654933839ce7b82540940e3b8a4e7110e57640ae84e4e2306e604177

Scanner detections:
8 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
11/23/2024 5:11:29 PM UTC  (today)

Scan engine
Detection
Engine version

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.1453

ESET NOD32
Win32/BrowseFox
8.9677

Malwarebytes
PUP.Optional.SkyWebber.A
v2014.04.19.03

McAfee
Artemis!4FA7210AFF75
5600.7155

Reason Heuristics
PUP.Skywebber.M
14.8.8.0

Rising Antivirus
NS:PUF.SilenceInstaller!1.9DDF
23.00.65.14417

Trend Micro House Call
TROJ_GEN.F47V0329
7.2.109

VIPRE Antivirus
Trojan.Win32.Generic
28244

File size:
198.8 KB (203,552 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}\skywebber_wd.exe

Digital Signature
Signed by:
Skywebber

Authority:
VeriSign, Inc.

Valid from:
10/6/2013 5:00:00 PM

Valid to:
10/7/2014 4:59:59 PM

Subject:
CN=Skywebber, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Skywebber, 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:
06606AB25DD3CD2FC4C1610240BD0EF8

File PE Metadata
Compilation timestamp:
12/5/2009 2:50:41 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
3072:wLk395hYXJsCemfnaCMLzNApJC0Lcrn9anH7l1m/GqMHJGULv:wQqDem/ahQJRknYnH7nm/G/Hc

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, 3F, 42, 00, E8, F1, 2B, 00, 00, A3, 84, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 36, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.8964

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

The file skywebber_wd.exe has been seen being distributed by the following 2 URLs.

http://www.windows-7-themes.com/.../Skywebber_wd.exe

http://www.ezthemes.com/.../Skywebber_wd.exe

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