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{ce9a260a-690e-4817-8376-82bdf0d29af3}gw64.sys

grassmow

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {ce9a260a-690e-4817-8376-82bdf0d29af3}gw64.sys by grassmow has been detected as adware by 15 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{ce9a260a-690e-4817-8376-82bdf0d29af3}Gw64”. 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:
StdLib  (signed by grassmow)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
b42578d8b90207d1ad8b54c442246917

SHA-1:
bc6df72becce12d5b24f7e21d769975a1a68c38f

SHA-256:
ad01fe65c9770d283bec16afc064d7981e18b473792ea2d34bb9066ed7a9ccc1

Scanner detections:
15 / 68

Status:
Adware

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

Analysis date:
4/25/2024 6:51:34 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CH
826

Agnitum Outpost
Riskware.Agent
7.1.1

AVG
Generic
2015.0.3304

Bitdefender
Adware.SwiftBrowse.CH
1.0.20.1520

Clam AntiVirus
Win.Adware.Swiftbrowse-497
0.98/21411

Dr.Web
hacktool program Tool.NetFilter.313
9.0.1.05190

Emsisoft Anti-Malware
Adware.SwiftBrowse.CH
8.14.10.31.09

ESET NOD32
Win64/BrowseFox.CD (variant)
8.10653

F-Prot
W64/A-bd57be8c
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.CH
11.2014-31-10_6

G Data
Adware.SwiftBrowse.CH
14.10.24

MicroWorld eScan
Adware.SwiftBrowse.CH
15.0.0.912

nProtect
Adware.SwiftBrowse.CH
14.10.31.01

Reason Heuristics
PUP.grassmow.n
14.10.31.20

VIPRE Antivirus
Threat.4150696
34232

File size:
47.7 KB (48,824 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\{ce9a260a-690e-4817-8376-82bdf0d29af3}gw64.sys

Digital Signature
Signed by:
grassmow

Authority:
VeriSign, Inc.

Valid from:
4/28/2014 7:00:00 PM

Valid to:
4/29/2015 6:59:59 PM

Subject:
CN=grassmow, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=grassmow, 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:
46F979858F2F3241487CBA3EF684BAE8

File PE Metadata
Compilation timestamp:
9/22/2014 2:01:54 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:ljC7G2EjsnyXeOUEGG0LA8tWFZuL470h6aqxcCT2kvsVRwlZD3LpE4:9eFID6EGnLA8AFJTNEVmDLO4

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:
6.3928

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{ce9a260a-690e-4817-8376-82bdf0d29af3}Gw64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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