home

{f81878fa-25e9-442d-8ada-79658b6520f2}w64.sys

Dynamo Combo

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {f81878fa-25e9-442d-8ada-79658b6520f2}w64.sys by Dynamo Combo has been detected as adware by 27 anti-malware scanners. It runs as a Windows 64-bit kernel mode device driver named “{f81878fa-25e9-442d-8ada-79658b6520f2}w64”. 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 Dynamo Combo)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
823080b017481d500a638d8186bb3ad8

SHA-1:
b37c0d525ad0cdf515430d072f5692beaf97a405

SHA-256:
b75abd88d8c272c818350673c81160cda7e7f4f7e86898a3a6b57181d5c26d4a

Scanner detections:
27 / 68

Status:
Adware

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

Analysis date:
4/25/2024 6:44:10 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Adware.SwiftBrowse.CH
705

Agnitum Outpost
Riskware.Agent
7.1.1

AVG
Generic
2016.0.3183

Baidu Antivirus
Adware.Win64.BrowseFox
4.0.3.1532

Bitdefender
Adware.SwiftBrowse.CH
1.0.20.305

Clam AntiVirus
Win.Adware.Swiftbrowse-497
0.98/21511

Dr.Web
Tool.NetFilter.313
9.0.1.061

Emsisoft Anti-Malware
Adware.SwiftBrowse.CH
8.15.03.02.04

ESET NOD32
Win64/BrowseFox.CG (variant)
9.11005

Fortinet FortiGate
Adware/BrowseFox
3/2/2015

F-Prot
W64/A-59c9c70a
v6.4.7.1.166

F-Secure
Adware.SwiftBrowse.CH
11.2015-02-03_2

G Data
Adware.SwiftBrowse.CH
15.3.24

K7 AntiVirus
Adware
13.191.14726

Kaspersky
not-a-virus:NetTool.Win64.NetFilter
14.0.0.2409

McAfee
Artemis!823080B01748
5600.6839

MicroWorld eScan
Adware.SwiftBrowse.CH
16.0.0.183

NANO AntiVirus
Riskware.Win64.NetFilter.dmkbbc
0.30.0.64812

Norman
Adware.SwiftBrowse.CH
11.20150302

nProtect
Adware.SwiftBrowse.CH
15.01.13.01

Panda Antivirus
Trj/CI.A
15.03.02.04

Qihoo 360 Security
Win32/Virus.NetTool.32d
1.0.0.1015

Reason Heuristics
PUP.Yontoo
15.3.2.4

Trend Micro House Call
TROJ_GEN.F0C2C00AF15
7.2.61

Trend Micro
TROJ_GEN.F0C2C00AF15
10.465.02

VIPRE Antivirus
Trojan.Win32.Generic
36612

Zillya! Antivirus
Adware.Yotoon.Win64.14
2.0.0.2033

File size:
47.6 KB (48,792 bytes)

Product version:
1.4.4.6

Copyright:
Copyright © 2013 StdLib

Original file name:
StdLib.sys

File type:
Driver (Win64 SYS)

Common path:
C:\Windows\System32\drivers\{f81878fa-25e9-442d-8ada-79658b6520f2}w64.sys

Digital Signature
Signed by:
Dynamo Combo

Authority:
VeriSign, Inc.

Valid from:
12/17/2014 3:00:00 AM

Valid to:
12/18/2015 2:59:59 AM

Subject:
CN=Dynamo Combo, O=Dynamo Combo, 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:
14A953D6CFA5311EDEF6756B21556A7A

File PE Metadata
Compilation timestamp:
1/13/2015 5:38:21 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:ls7G2EjsnyXeOUEGG0LA8tWFZuL470h6aqxcCT2kvsVRwlZD3xy:CFID6EGnLA8AFJTNEVmD4

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...
 
[+]

Code size:
34.5 KB (35,328 bytes)

Driver
Display name:
{f81878fa-25e9-442d-8ada-79658b6520f2}w64

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


herdProtect is a second line of defense malware removal platform powered by 68 anti-malware engines in the cloud. Since no single anti-malware program is perfect 100% of the time, herdProtect utilizes a 'herd' of multiple engines to guarantee the widest coverage and the earliest possible detection.