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setup.exe

SerialTrunc

This is the installer and setup program from the SerialTrunc 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 background service that will update the software with additional features. The application setup.exe by SerialTrunc has been detected as adware by 10 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.
Publisher:
SerialTrunc  (signed and verified)

MD5:
d0e0b3c377fe615ecf403be820885266

SHA-1:
6e4b1a511b2852a398411bf7f44b1c8252098a84

SHA-256:
ce39c92b6ca8e04dba0bf3d4114173b18f454b6a8c211fd1367050e7109bc5d1

Scanner detections:
10 / 68

Status:
Adware

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

Analysis date:
4/25/2024 5:42:32 AM UTC  (today)

Scan engine
Detection
Engine version

Comodo Security
Application.Win32.Altbrowse.AK
17646

Dr.Web
Trojan.BPlug.10
9.0.1.028

ESET NOD32
Win32/BrowseFox
8.9314

IKARUS anti.virus
not-a-virus:AdWare.Win32.Agent
t3scan.2.2.29

Kaspersky
not-a-virus:AdWare.Win32.Agent
14.0.0.4395

NANO AntiVirus
Riskware.Win32.Agent.cqvnby
0.28.0.57380

Reason Heuristics
PUP.Installer.SerialTrunc.F
14.8.8.3

Rising Antivirus
NS:PUF.SilenceInstaller!1.9DDF
23.00.65.14126

Sophos
Generic PUA GO
4.96

Trend Micro House Call
TROJ_GEN.F47V0119
7.2.28

File size:
867.3 KB (888,072 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}\setup.exe

Digital Signature
Signed by:
SerialTrunc

Authority:
VeriSign, Inc.

Valid from:
1/2/2014 4:00:00 PM

Valid to:
1/3/2015 3:59:59 PM

Subject:
CN=SerialTrunc, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=SerialTrunc, 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:
167D55FA84ED98E4D7F5933FEC5E95BA

File PE Metadata
Compilation timestamp:
12/5/2009 2:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:KVXfRzPAl1s15AB/G/83yk5Lhew9GumfYwR+Q++/v1s6lEDTm9yT8jzPAl1s15A3:KTk6F83yAhDRiYwR+Q+ugKyTgk6l89

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:
7.9891

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

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

http://wpc.0952.edgecastcdn.net/800952/.../setup.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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