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{f859b84f-5666-4db9-b82f-c4059aae8848}gw.sys

Primary Color

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {f859b84f-5666-4db9-b82f-c4059aae8848}gw.sys by Primary Color has been detected as adware by 21 anti-malware scanners. It runs as a Windows kernel mode device driver named “{f859b84f-5666-4db9-b82f-c4059aae8848}Gw”. 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 Primary Color)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
6b4f52fb987b8970bc29f4e68b2416a4

SHA-1:
722765ffd45629442107bf8638df4f743f158f67

SHA-256:
2e8317de5cc93135f282dafd738d3e27d102b156b30e4a4f6bec846a81085598

Scanner detections:
21 / 68

Status:
Adware

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

Analysis date:
4/26/2024 12:04:19 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.BrowseFox.V
432

Agnitum Outpost
PUA.BrowseFox
7.1.1

Avira AntiVirus
ADWARE/BrowseFox.A.1227
8.3.1.6

AVG
Generic
2016.0.2910

Bitdefender
Adware.BrowseFox.V
1.0.20.1665

Bkav FE
W32.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Netfilter-134
0.98/21511

Comodo Security
TrojWare.Win32.AltBrowse.IZZV
22250

Dr.Web
Trojan.Yontoo.1837
9.0.1.0333

Emsisoft Anti-Malware
Adware.BrowseFox.V
8.15.11.29.01

ESET NOD32
Win32/NetFilter.A potentially unsafe (variant)
9.11691

F-Prot
W32/S-a7161e1c
v6.4.7.1.166

F-Secure
Adware.BrowseFox.V
11.2015-29-11_1

G Data
Adware.BrowseFox
15.11.25

K7 AntiVirus
Unwanted-Program
13.204.16039

Malwarebytes
PUP.Optional.PrimaryColor.A
v2015.11.29.01

MicroWorld eScan
Adware.BrowseFox.V
16.0.0.999

nProtect
Adware.BrowseFox.V
15.05.22.01

Reason Heuristics
PUP.Yontoo.PrimaryColor (M)
15.11.29.13

Vba32 AntiVirus
AdWare.Zaitu
3.12.26.4

VIPRE Antivirus
Trojan.Win32.Generic
40588

File size:
42.1 KB (43,152 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{f859b84f-5666-4db9-b82f-c4059aae8848}gw.sys

Digital Signature
Signed by:
Primary Color

Authority:
VeriSign, Inc.

Valid from:
1/15/2015 10:00:00 AM

Valid to:
1/16/2016 9:59:59 AM

Subject:
CN=Primary Color, O=Primary Color, 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:
25DC34062844409A5E421392BA5A17B2

File PE Metadata
Compilation timestamp:
5/27/2015 1:40:26 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:sN0457WBZwpHs63E+X7BIrTsCEziDH+JgrVJddus2:khUcpH/0+LCf7EziDHhdj2

Entry address:
0xA03E

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 20, 70, FF, FF, CC, CC, 94, A1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, CE, A4, 00, 00, E0, 80, 00, 00, B4, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 24, A5, 00, 00, 00, 80, 00, 00, EC, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, A4, A9, 00, 00, 38, 80, 00, 00, C4, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 9C, AA, 00, 00, 10, 80, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, FC, A4, 00, 00, 10, A5, 00, 00, E8, A4...
 
[+]

Entropy:
6.6164

Code size:
28 KB (28,672 bytes)

Driver
Display name:
{f859b84f-5666-4db9-b82f-c4059aae8848}Gw

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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