home

{21c63c07-3dae-48cc-95ab-ff9287f82f6b}w.sys

fassurun

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {21c63c07-3dae-48cc-95ab-ff9287f82f6b}w.sys by fassurun has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It runs as a Windows kernel mode device driver named “{21c63c07-3dae-48cc-95ab-ff9287f82f6b}w”.
Publisher:
StdLib  (signed by fassurun)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
3522743079dfc245bc07c1d7c4ef04b5

SHA-1:
c5c12df0759d1635a8dce4d18a29409e6d02e22e

SHA-256:
04c1de8b7951fae16f98d3f386a3a7ee7c44cba66ceba524cb69f337b61b9811

Scanner detections:
1 / 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:
4/26/2024 7:50:30 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.fassurun (M)
16.1.22.3

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\{21c63c07-3dae-48cc-95ab-ff9287f82f6b}w.sys

Digital Signature
Signed by:
fassurun

Authority:
VeriSign, Inc.

Valid from:
8/21/2013 1:00:00 AM

Valid to:
8/21/2015 12:59:59 AM

Subject:
CN=fassurun, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=fassurun, 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:
6EA3A2D62F7379560AF4974E60282338

File PE Metadata
Compilation timestamp:
1/31/2014 1:45:28 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:CIsHpnKHCBSqUPJHKQpkJxpKwT2bcWiJmOtX3g2rp3lnTQqm:VsHRKHLJqQpkYwTsiTtXxt8F

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...
 
[+]

Code size:
37 KB (37,888 bytes)

Driver
Display name:
{21c63c07-3dae-48cc-95ab-ff9287f82f6b}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


Remove {21c63c07-3dae-48cc-95ab-ff9287f82f6b}w.sys - Powered by Reason Core Security
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.