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{a88c5367-7ba7-4188-92bf-b63ed9a9e22e}w.sys

Spring Smart

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {a88c5367-7ba7-4188-92bf-b63ed9a9e22e}w.sys by Spring Smart has been detected as adware by 15 anti-malware scanners. It runs as a Windows kernel mode device driver named “{a88c5367-7ba7-4188-92bf-b63ed9a9e22e}w”. 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 Spring Smart)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
5af36afd176849763aeb7d63afe0491f

SHA-1:
c0005c0daf72fa8fd5fbb5afd5d329460cd25ab4

SHA-256:
23639c331ff4f56bf4409395c5c1faeb733634d25710769eb94601de4bcc934a

Scanner detections:
15 / 68

Status:
Adware

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

Analysis date:
4/16/2024 4:00:59 AM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
RiskWare.NetFilter
7.1.1

AhnLab V3 Security
PUP/Win32.BrowseFox
2015.02.25

Avira AntiVirus
Adware/BrowseFox.A.168
7.11.212.80

avast!
Win32:BrowseFox-GQ [PUP]
2014.9-160127

AVG
Spmart
2017.0.2852

Bkav FE
W32.HfsAdware
1.3.0.6379

Clam AntiVirus
Win.Adware.Browsefox-60
0.98/20101

Comodo Security
Application.Win32.RiskWare.NetFilter.D
21196

ESET NOD32
Win32/Komodia.A potentially unsafe (variant)
10.11225

F-Prot
W32/A-0937c3f0
v6.4.7.1.166

NANO AntiVirus
Riskware.Win32.Yotoon.dfewso
0.30.0.296

Reason Heuristics
PUP.Yontoo.SpringSmart (M)
16.1.27.11

Vba32 AntiVirus
AdWare.Yotoon
3.12.26.3

VIPRE Antivirus
Threat.4150696
37588

Zillya! Antivirus
Adware.Yotoon.Win64.8
2.0.0.2079

File size:
51.7 KB (52,928 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win32 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{a88c5367-7ba7-4188-92bf-b63ed9a9e22e}w.sys

Digital Signature
Signed by:
Spring Smart

Authority:
VeriSign, Inc.

Valid from:
8/21/2013 7:00:00 PM

Valid to:
8/22/2015 6:59:59 PM

Subject:
CN=Spring Smart, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Spring Smart, 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:
5D69FD87A1BCECDB8891F45F148E34E2

File PE Metadata
Compilation timestamp:
1/30/2014 6:45:28 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:nIsHpnKHCBSqUPJHKQpkJxpKwT2bcWiJmOtX3g2rp3lnPMRZ:IsHRKHLJqQpkYwTsiTtXxtE3

Entry address:
0xC03E

Entry point:
8B, FF, 55, 8B, EC, E8, BD, FF, FF, FF, 5D, E9, 62, 50, FF, FF, CC, CC, 74, C1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BC, C4, 00, 00, C0, A0, 00, 00, B4, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 12, C5, 00, 00, 00, A0, 00, 00, EC, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, AE, C8, 00, 00, 38, A0, 00, 00, C4, C0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, A6, C9, 00, 00, 10, A0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, EA, C4, 00, 00, FE, C4, 00, 00, D6, C4...
 
[+]

Entropy:
6.3572

Code size:
37 KB (37,888 bytes)

Driver
Display name:
{a88c5367-7ba7-4188-92bf-b63ed9a9e22e}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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