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cytiwebsetup.exe

Cyti Web

This is the installer and setup program from the Cyti Web 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 cytiwebsetup.exe by Cyti Web has been detected as adware by 21 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:
Cyti Web  (signed and verified)

MD5:
c6d4083d96171889c233a563cf9e0427

SHA-1:
b4afaee3befc3c492f38abd3d7dda751d3c95b4c

SHA-256:
0aa5460997f91efc9d39a1098054d8d70d959f0a41c946f20cb70af87385568c

Scanner detections:
21 / 68

Status:
Adware

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

Analysis date:
4/25/2024 2:30:35 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.BF
6473648

AhnLab V3 Security
PUP/Win32.SwiftBrowse
2015.01.29

Avira AntiVirus
ADWARE/BrowseFox.Gen
7.11.205.178

AVG
Generic
2016.0.3216

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.15128

Bitdefender
Adware.BrowseFox.BF
1.0.20.140

Dr.Web
Trojan.Yontoo.475
9.0.1.05190

Emsisoft Anti-Malware
Adware.BrowseFox.BF
9.0.0.4799

ESET NOD32
Win32/BrowseFox.C potentially unwanted application
7.0.302.0

F-Prot
W32/S-b5aa130f
v6.4.7.1.166

F-Secure
Adware.BrowseFox.BF
5.13.68

G Data
Adware.BrowseFox.BF
15.1.25

K7 AntiVirus
Unwanted-Program
13.193.14786

Malwarebytes
PUP.Optional.BPlug
v2015.01.28.11

MicroWorld eScan
Adware.BrowseFox.BF
16.0.0.84

NANO AntiVirus
Trojan.Win32.BPlug.dfsehz
0.30.0.65070

nProtect
Adware.BrowseFox.BF
15.01.28.01

Qihoo 360 Security
Win32/Virus.Adware.80e
1.0.0.1015

Reason Heuristics
PUP.Installer.Yontoo
15.1.28.11

Rising Antivirus
NS:PUF.SilenceInstaller!1.9DDF
23.00.65.15126

VIPRE Antivirus
Threat.4150696
36666

File size:
569.5 KB (583,160 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}\cytiwebsetup.exe

Digital Signature
Signed by:
Cyti Web

Authority:
VeriSign, Inc.

Valid from:
11/19/2014 1:00:00 AM

Valid to:
11/20/2015 12:59:59 AM

Subject:
CN=Cyti Web, O=Cyti Web, L=Santa Monica, 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:
2EA907673DCE80C1AF3DAA010B4C3CA9

File PE Metadata
Compilation timestamp:
12/5/2009 11:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:Q0v507jfRLT1s15Ap/G/8/3D0Fw/tN8dkmLtpHHHrh7buDDEnfTC3L:Qc07N6j8/z0FmcLbH1bECo

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...
 
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Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 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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