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gbstub.exe

GBStub

ClientConnect LTD

The file belongs to the ClientConnect (Conduit/Perion) platform, a utility that bundles and monetizes search toolbars and browser add-ons. The application gbstub.exe by ClientConnect has been detected as adware by 16 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. The file has been seen being downloaded from gbstorage.stgbssint.com. While running, it connects to the Internet address cms.dmccint.com on port 80 using the HTTP protocol.
Publisher:
Client Connect Ltd.  (signed by ClientConnect LTD)

Product:
GBStub

Version:
1.0.0.9

MD5:
54e6b237e455706da4f40ff0cf68a474

SHA-1:
1ff8061be3449748bfe1d728acc6fe256af36878

SHA-256:
292b3853b25f64a8a6f252de798d594478d38207328ce81ca0a30eae0be7e882

Scanner detections:
16 / 68

Status:
Adware

Explanation:
Bundles the Conduit Toolbar and/or Conduit Search Protect.

Analysis date:
11/5/2024 6:59:12 AM UTC  (today)

Scan engine
Detection
Engine version

avast!
Win32:Malware-gen
2014.9-150311

AVG
Generic
2016.0.3173

Baidu Antivirus
PUA.Win32.ClientConnect
4.0.3.15311

Bkav FE
W32.FamVT.ClientconnectB.TTc
1.3.0.6379

ESET NOD32
Win32/ClientConnect.A potentially unwanted (variant)
9.11304

Fortinet FortiGate
Riskware/Agent
3/11/2015

G Data
Win32.Application.SearchProtect.AJ
15.3.25

K7 AntiVirus
Trojan
13.200.15235

Kaspersky
not-a-virus:WebToolbar.Win32.Agent
14.0.0.2360

Malwarebytes
PUP.Optional.ClientConnect
v2015.03.11.10

McAfee
Artemis!54E6B237E455
5600.6829

Qihoo 360 Security
Win32/Virus.WebToolbar.48f
1.0.0.1015

Reason Heuristics
PUP.Installer.Conduit
15.3.11.23

Sophos
Generic PUA BP
4.98

Trend Micro House Call
TROJ_GEN.R00UH07BH15
7.2.70

VIPRE Antivirus
Conduit
38338

File size:
222.3 KB (227,600 bytes)

Product version:
1.0.0.9

Copyright:
© 2014 ClientConnect Ltd.

Original file name:
GBStub

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\inetcache\content.ie5\0b3gnyok\gbstub.exe

Digital Signature
Signed by:
ClientConnect LTD

Authority:
Symantec Corporation

Valid from:
7/9/2014 10:00:00 AM

Valid to:
7/10/2016 9:59:59 AM

Subject:
CN=ClientConnect LTD, OU=Guardbox, O=ClientConnect LTD, L=Ness Ziona, S=Israel, C=IL

Issuer:
CN=Symantec Class 3 SHA256 Code Signing CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US

Serial number:
3215FFC06E15A37E45F6521CECC8C3BD

File PE Metadata
Compilation timestamp:
2/25/2012 6:19:59 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
3072:YweqOYEUXPnSM4dENId/N9zmF7ZFERJZZ0HwXfbhwLF8hlW3jGzu7lorLdHpWU/c:ZEUXmdENIdF9ogdiShU3jR50LJvdUf

Entry address:
0x39E3

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, D8, 91, 40, 00, 89, 6C, 24, 14, FF, 15, 30, 80, 40, 00, 68, 01, 80, 00, 00, FF, 15, B8, 80, 40, 00, 55, FF, 15, C0, 82, 40, 00, 6A, 08, A3, B8, 2E, 47, 00, E8, 37, 2A, 00, 00, 55, 68, B4, 02, 00, 00, A3, D0, 2D, 47, 00, 8D, 44, 24, 38, 50, 55, 68, 1C, 93, 40, 00, FF, 15, 84, 81, 40, 00, 68, 04, 93, 40, 00, 68, C0, AD, 46, 00, E8, 19, 27, 00, 00, FF, 15, B4, 80, 40, 00, 50, BF, A0, 30, 4C, 00, 57, E8, 07, 27, 00, 00...
 
[+]

Entropy:
7.8365

Packer / compiler:
Nullsoft install system v2.x

Code size:
28 KB (28,672 bytes)

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

http://gbstorage.stgbssint.com/stub/.../GBStub.exe

The executing file has been seen to make the following network communication in live environments.

TCP (HTTP):
Connects to cms.dmccint.com  (23.67.242.80:80)

 
http://cms.dmccint.com/DynamicOffer/18869335/18890458/?mainofferId=18865901&CurrentStep=2&TotalSteps=4&DownloadBrowser=IE&CType=-1&UserMode=-1&DMVersion=1.3.8.88.18889324.01&Language=US-EN

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