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cytiwebsetup.exe

Girafarri

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application cytiwebsetup.exe by Girafarri has been detected as adware by 17 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. While running, it connects to the Internet address api.yontoo.com on port 80 using the HTTP protocol.
Publisher:
Girafarri  (signed and verified)

MD5:
5352460b55da784cff7ce2ce4695858b

SHA-1:
f276c23421292ff108ca2744166d26a58c5a446d

SHA-256:
db64bf3f876aea99c93537b33477e8ebacdf3c540f858c19757794c32bfd8aa9

Scanner detections:
17 / 68

Status:
Adware

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

Analysis date:
4/27/2024 1:31:24 AM UTC  (today)

Scan engine
Detection
Engine version

AhnLab V3 Security
PUP/Win32.BrowseFox
2015.02.27

Avira AntiVirus
ADWARE/BrowseFox.Gen
7.11.212.152

avast!
Win32:PUP-gen [PUP]
2014.9-150227

AVG
BrowseFox.H
2016.0.3185

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.15227

Dr.Web
Trojan.BPlug.181
9.0.1.058

ESET NOD32
Win32/BrowseFox.C potentially unwanted
9.11239

F-Prot
W32/S-c9f3cc61
v6.4.7.1.166

G Data
NSIS.Application.BrowseFox
15.2.25

IKARUS anti.virus
AdWare.BrowseFox
t3scan.1.8.6.0

K7 AntiVirus
Unwanted-Program
13.1915099

Malwarebytes
PUP.Optional.BPlug
v2015.02.27.08

McAfee
BrowseFox-FWC
5600.6841

NANO AntiVirus
Trojan.Win32.BPlug.dfsehz
0.30.0.296

Reason Heuristics
PUP.Installer.Yontoo
15.2.27.20

Rising Antivirus
NS:PUF.SilenceInstaller!1.9DDF
23.00.65.15225

VIPRE Antivirus
Trojan.Win32.Generic
37942

File size:
569.5 KB (583,136 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\inetcache\content.ie5\objpwsih\cytiwebsetup.exe

Digital Signature
Signed by:
Girafarri

Authority:
VeriSign, Inc.

Valid from:
4/22/2014 2:00:00 AM

Valid to:
4/23/2015 1:59:59 AM

Subject:
CN=Girafarri, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Girafarri, 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:
2FB197284297D52000599AA2F7D0668F

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:LvqiSP7KhGBk1s15Ap/G/8/3D0Fw/tN8dkmLtpHHHrh7wE85XrAq:LvUjK0G6j8/z0FmcLbH1wESUq

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...
 
[+]

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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