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{19831108-de35-4c98-b883-7bb790bfc59c}gw.sys

Fralimbo

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {19831108-de35-4c98-b883-7bb790bfc59c}gw.sys by Fralimbo has been detected as adware by 8 anti-malware scanners. It runs as a Windows kernel mode device driver named “{19831108-de35-4c98-b883-7bb790bfc59c}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 Fralimbo)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
89be7d81a62c2ea87cf4d72ee5bb0b51

SHA-1:
02ee0b872508e6dbcfda2790c9cf2f0aa022410d

SHA-256:
706ee0c34b70828450db384a9d70c941586d8cdd5c445bcdb844846f5af35204

Scanner detections:
8 / 68

Status:
Adware

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

Analysis date:
4/25/2024 12:45:32 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.Yotoon
7.1.1

AVG
Generic
2015.0.3286

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141119

Dr.Web
Trojan.BPlug.123
9.0.1.0323

Reason Heuristics
PUP.Fralimbo.l
14.11.19.10

Trend Micro House Call
Suspicious_GEN.F47V0718
7.2.323

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Trojan.Win32.Generic
31810

File size:
51.7 KB (52,920 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\{19831108-de35-4c98-b883-7bb790bfc59c}gw.sys

Digital Signature
Signed by:
Fralimbo

Authority:
VeriSign, Inc.

Valid from:
11/13/2013 4:00:00 PM

Valid to:
11/14/2014 3:59:59 PM

Subject:
CN=Fralimbo, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Fralimbo, 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:
4EA4A1919F354306FDA2DA6D760C0CAE

File PE Metadata
Compilation timestamp:
1/30/2014 4:45:28 PM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:AIsHpnKHCBSqUPJHKQpkJxpKwT2bcWiJmOtX3g2rp3lnn12HMI:3sHRKHLJqQpkYwTsiTtXxtcHMI

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:
6.3573

Code size:
37 KB (37,888 bytes)

Driver
Display name:
{19831108-de35-4c98-b883-7bb790bfc59c}Gw

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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