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{a55667f1-a319-4629-a8b6-a68d9d3313ee}gw64.sys

Clock Hand

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {a55667f1-a319-4629-a8b6-a68d9d3313ee}gw64.sys by Clock Hand has been detected as adware by 21 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{a55667f1-a319-4629-a8b6-a68d9d3313ee}Gw64”.
Publisher:
StdLib  (signed by Clock Hand)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
2e1634dc629dc936c8634c4f02aaf464

SHA-1:
fe3e71ea028e32c2fd701fb392920d9bea05ec54

SHA-256:
5e1c78da0bbcbc85176e9161e152c907217ff7eab008010b46b0f10bab3df258

Scanner detections:
21 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
4/18/2024 9:42:08 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CH
6766314

Agnitum Outpost
Riskware.Agent
7.1.1

AVG
Generic
2016.0.3179

Bitdefender
Adware.SwiftBrowse.CH
1.0.20.320

Clam AntiVirus
Win.Adware.Swiftbrowse-497
0.98/21511

Dr.Web
Tool.NetFilter.313
9.0.1.064

Emsisoft Anti-Malware
Adware.SwiftBrowse.CH
9.0.0.4799

ESET NOD32
Win64/NetFilter.A potentially unsafe application
7.0.302.0

F-Prot
W64/A-59c9c70a
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.CH
5.13.68

G Data
Adware.SwiftBrowse.CH
15.3.25

herdProtect (fuzzy)
variant of {a89df9a8-0937-4686-a328-41c7bcd926b2}w64.sys (Adware)
2015.6.12.13

K7 AntiVirus
Adware
13.200.15176

MicroWorld eScan
Adware.SwiftBrowse.CH
16.0.0.192

Norman
Adware.SwiftBrowse.CH
03.12.2014 13:20:04

nProtect
Adware.SwiftBrowse.CH
15.03.05.01

Reason Heuristics
PUP.Yontoo
15.3.5.20

Trend Micro House Call
HS_BROWSEFOX.SM
7.2.64

Trend Micro
HS_BROWSEFOX.SM
10.465.05

VIPRE Antivirus
Threat.4150696
37788

Zillya! Antivirus
Adware.Yotoon.Win64.14
2.0.0.2089

File size:
47.6 KB (48,784 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{a55667f1-a319-4629-a8b6-a68d9d3313ee}gw64.sys

Digital Signature
Signed by:
Clock Hand

Authority:
VeriSign, Inc.

Valid from:
1/10/2015 6:00:00 PM

Valid to:
1/11/2016 5:59:59 PM

Subject:
CN=Clock Hand, O=Clock Hand, L=San Diego, 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:
456A42223C623741F26F18A9D4223E47

File PE Metadata
Compilation timestamp:
3/5/2015 4:32:34 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:lA7G2EjsnyXeOUEGG0LA8tWFZuL470h6aqxcCT2kvsVRwlZD3IERIB:yFID6EGnLA8AFJTNEVmDTRs

Entry address:
0xC064

Entry point:
48, 83, EC, 28, 4C, 8B, C2, 4C, 8B, C9, E8, 95, FF, FF, FF, 49, 8B, D0, 49, 8B, C9, 48, 83, C4, 28, E9, E2, 50, FF, FF, CC, CC, 78, C2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 54, C6, 00, 00, A0, 91, 00, 00, 28, C1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, DA, CA, 00, 00, 50, 90, 00, 00, D8, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, D2, CB, 00, 00, 00, 90, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, CB, 00, 00, 00, 00, 00, 00, A2, CB, 00, 00...
 
[+]

Entropy:
6.3923

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{a55667f1-a319-4629-a8b6-a68d9d3313ee}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


herdProtect is a second line of defense malware removal platform powered by 68 anti-malware engines in the cloud. Since no single anti-malware program is perfect 100% of the time, herdProtect utilizes a 'herd' of multiple engines to guarantee the widest coverage and the earliest possible detection.