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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 29 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. While running, it connects to the Internet address api.yontoo.com on port 80 using the HTTP protocol.
Publisher:
Girafarri  (signed and verified)

MD5:
9ee6d8fbd44cfdd43d20c843d51ff7ae

SHA-1:
6bb973b1d4e574950749f367dc23f805fc4fb8d4

SHA-256:
eed97705b1e0202544bcf2a5f9d3dcab5383ce2d5cc88dbb77d296cf0e67b0b8

Scanner detections:
29 / 68

Status:
Adware

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

Analysis date:
4/20/2024 12:57:56 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.CA
676

AhnLab V3 Security
PUP/Win32.SwiftBrowse
2015.03.31

Avira AntiVirus
ADWARE/BrowseFox.Gen
3.6.1.96

avast!
Win32:PUP-gen [PUP]
2014.9-150331

AVG
BrowseFox.H
2016.0.3154

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.15331

Bitdefender
Adware.BrowseFox.CA
1.0.20.450

Bkav FE
W32.HfsAdware
1.3.0.6379

Dr.Web
Trojan.Yontoo.1734
9.0.1.090

Emsisoft Anti-Malware
Adware.BrowseFox.CA
8.15.03.31.02

ESET NOD32
Win32/BrowseFox.C potentially unwanted
9.11398

Fortinet FortiGate
Riskware/BrowseFox
3/31/2015

F-Prot
W32/S-c9f3cc61
v6.4.7.1.166

F-Secure
Adware.BrowseFox.CA
11.2015-31-03_3

G Data
Adware.BrowseFox.CA
15.3.25

K7 AntiVirus
Unwanted-Program
13.202.15424

Malwarebytes
PUP.Optional.BPlug
v2015.03.31.02

McAfee
Artemis!9EE6D8FBD44C
5600.6810

MicroWorld eScan
Adware.BrowseFox.CA
16.0.0.270

NANO AntiVirus
Trojan.Win32.BPlug.dfsehz
0.30.8.659

nProtect
Adware.BrowseFox.CA
15.03.30.01

Panda Antivirus
Trj/CI.A
15.03.31.02

Qihoo 360 Security
HEUR/QVM42.0.Malware.Gen
1.0.0.1015

Reason Heuristics
PUP.Installer.Yontoo
15.3.31.2

Rising Antivirus
PE:Malware.Kranet!6.20B9
23.00.65.15329

Sophos
Generic PUA GL
4.98

Trend Micro House Call
TROJ_GEN.R047C0OBN15
7.2.90

Trend Micro
TROJ_GEN.R047C0OBN15
10.465.31

VIPRE Antivirus
Trojan.Win32.Generic
38900

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:
Girafarri

Authority:
VeriSign, Inc.

Valid from:
4/21/2014 5:00:00 PM

Valid to:
4/22/2015 4:59:59 PM

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 2:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:1E07ROYTnzYj1s15Ap/G/8/3D0Fw/tN8dkmLtpHHHrh7LgGQ9BjPnrd:137lzC6j8/z0FmcLbH1LgGID

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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