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{6f977c0f-6444-4de7-ac45-ce7cc5f3060e}w64.sys

BringStar

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {6f977c0f-6444-4de7-ac45-ce7cc5f3060e}w64.sys by BringStar 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 64-bit kernel mode device driver named “{6f977c0f-6444-4de7-ac45-ce7cc5f3060e}w64”.
Publisher:
StdLib  (signed by BringStar)

Product:
StdLib

Version:
1.4.4.6 built by: WinDDK

MD5:
de8b210950a0c22c26e8c407e7896131

SHA-1:
af1273ad6d0362d962672c816dfc34a816bfc984

SHA-256:
a140e416cb27286ec41fb96ad5c1ac03e80934519fa10137d22448517a1fd8cf

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:
4/19/2024 7:05:59 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.BringStar (M)
16.2.9.8

File size:
47.7 KB (48,824 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\{6f977c0f-6444-4de7-ac45-ce7cc5f3060e}w64.sys

Digital Signature
Signed by:
BringStar

Authority:
VeriSign, Inc.

Valid from:
1/9/2014 4:00:00 AM

Valid to:
1/10/2015 3:59:59 AM

Subject:
CN=BringStar, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=BringStar, 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:
0690B649CE1A1DFAAC570B0AAE6E5D30

File PE Metadata
Compilation timestamp:
11/29/2014 11:23:02 AM

OS version:
6.1

OS bitness:
Win64

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:lG7G2EjsnyXeOUEGG0LA8tWFZuL470h6aqxcCT2kvsVRwlZD38Mc:gFID6EGnLA8AFJTNEVmD3c

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:
{6f977c0f-6444-4de7-ac45-ce7cc5f3060e}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.