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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 22 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:
3f8309dfd3c80db9fbee79f36ce28b9d

SHA-1:
143228352ac3034890bedb7bad84b792138165ce

SHA-256:
0f292bb816c626cdcc48ff8b31eea82217d619547796ff9a4816f7cc110e7422

Scanner detections:
22 / 68

Status:
Adware

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

Analysis date:
4/19/2024 11:07:46 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.BF
6428453

AhnLab V3 Security
PUP/Win32.SwiftBrowse
2015.01.25

Avira AntiVirus
ADWARE/BrowseFox.Gen
7.11.204.248

AVG
Generic
2016.0.3219

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.15124

Bitdefender
Adware.BrowseFox.BF
1.0.20.120

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

Fortinet FortiGate
Riskware/BrowseFox
1/24/2015

F-Prot
W32/S-b5aa130f
v6.4.7.1.166

F-Secure
Adware.BrowseFox.BF
5.13.68

G Data
Adware.BrowseFox.BF
15.1.24

K7 AntiVirus
Unwanted-Program
13.192.14744

Malwarebytes
PUP.Optional.BPlug
v2015.01.24.11

McAfee
Trojan.Artemis!3F8309DFD3C8
16.8.708.2

MicroWorld eScan
Adware.BrowseFox.BF
16.0.0.72

NANO AntiVirus
Trojan.Win32.BPlug.dfsehz
0.30.0.64812

nProtect
Adware.BrowseFox.BF
15.01.23.01

Reason Heuristics
PUP.Installer.Yontoo
15.1.24.23

Rising Antivirus
NS:PUF.SilenceInstaller!1.9DDF
23.00.65.15122

VIPRE Antivirus
Threat.4150696
36694

File size:
569.4 KB (583,104 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:
11/18/2014 7:00:00 PM

Valid to:
11/19/2015 6:59:59 PM

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 5:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:mHLDm2Mf1s15Ap/G/8/3D0Fw/tN8dkmLtpHHHrh7BTYZHGWo:mfS6j8/z0FmcLbH1BTIQ

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:
7.9813

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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