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{19831108-de35-4c98-b883-7bb790bfc59c}w64.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}w64.sys by Fralimbo has been detected as adware by 16 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{19831108-de35-4c98-b883-7bb790bfc59c}w64”.
Publisher:
StdLib  (signed by Fralimbo)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
0ff86e4cbdd9bbb522e1657117c798e1

SHA-1:
12921e940e3341309b0d83539956b8a3ffed4447

SHA-256:
5ad0ae40b008d8319fc7923bb6041ed223b4a3bb948bd13a0f1aa47599bc0f57

Scanner detections:
16 / 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:
5/10/2024 3:52:40 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.BV
813

Agnitum Outpost
Riskware.NetFilter
7.1.1

AhnLab V3 Security
Trojan/Win64.SwiftBrowse
2014.11.14

AVG
Generic
2015.0.3291

Bitdefender
Adware.SwiftBrowse.BV
1.0.20.1585

Clam AntiVirus
Win.Adware.Swiftbrowse-284
0.98/21411

Dr.Web
hacktool program Tool.NetFilter.1
9.0.1.05190

Emsisoft Anti-Malware
Adware.SwiftBrowse.BV
8.14.11.13.01

F-Prot
W64/A-abca7297
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.BV
11.2014-13-11_5

G Data
Adware.SwiftBrowse.BV
14.11.24

MicroWorld eScan
Adware.SwiftBrowse.BV
15.0.0.951

nProtect
Adware.SwiftBrowse.BV
14.11.13.01

Reason Heuristics
PUP.Fralimbo.m
14.11.13.12

VIPRE Antivirus
Threat.4150696
34232

Zillya! Antivirus
Adware.Yotoon.Win64.13
2.0.0.1982

File size:
43.7 KB (44,728 bytes)

Product version:
1.4.3.1

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Language:
English (United States)

Common path:
C:\Windows\System32\drivers\{19831108-de35-4c98-b883-7bb790bfc59c}w64.sys

Digital Signature
Signed by:
Fralimbo

Authority:
VeriSign, Inc.

Valid from:
11/13/2013 6:00:00 PM

Valid to:
11/14/2014 5:59:59 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:
9/12/2014 6:33:02 PM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:OgLmaZF8aSQ7DwZmEhzg8ClFHeDrTdRfsQCa5075YLwidHw122K:h5ZEQI8E7ClquaC759Eph

Entry address:
0xB064

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, C6, 60, FF, FF, CC, CC, 38, B2, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 1C, B6, 00, 00, 60, 81, 00, 00, 28, B1, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, BE, B9, 00, 00, 50, 80, 00, 00, D8, B0, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, B6, BA, 00, 00, 00, 80, 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, 9A, BA, 00, 00, 00, 00, 00, 00, 86, BA, 00, 00...
 
[+]

Entropy:
6.3757

Code size:
30.5 KB (31,232 bytes)

Driver
Display name:
{19831108-de35-4c98-b883-7bb790bfc59c}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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