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{1b646e65-56b2-4543-b72c-0e8976cf559e}w.sys

Cling Clang

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file {1b646e65-56b2-4543-b72c-0e8976cf559e}w.sys by Cling Clang has been detected as adware by 11 anti-malware scanners. It runs as a Windows kernel mode device driver named “{1b646e65-56b2-4543-b72c-0e8976cf559e}w”. 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 Cling Clang)

Product:
StdLib

Version:
1.4.3.1 built by: WinDDK

MD5:
aac6a146716a6a6464332cfbce4c88fd

SHA-1:
e0f70b77b807972608825e13b3f86fd5880d3167

SHA-256:
26b76c9c474f1764e08fe41184dc028e0f22f20570ef068342c588f728fa0bdd

Scanner detections:
11 / 68

Status:
Adware

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

Analysis date:
4/25/2024 9:29:53 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.Yotoon
7.1.1

AVG
Focusbase
2017.0.2848

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.16131

Dr.Web
Trojan.BPlug.123
9.0.1.031

McAfee
Artemis!E1773805D7CA
5600.6504

NANO AntiVirus
Riskware.Win32.Yotoon.ddghtt
0.28.2.61349

Panda Antivirus
Adware/BrowserFox
16.01.31.05

Reason Heuristics
PUP.Yontoo.ClingClang (M)
16.1.31.5

Trend Micro House Call
Suspicious_GEN.F47V0706
7.2.31

Vba32 AntiVirus
AdWare.Win64.Yotoon
3.12.26.3

VIPRE Antivirus
Trojan.Win32.Generic
31762

File size:
51.7 KB (52,928 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\{1b646e65-56b2-4543-b72c-0e8976cf559e}w.sys

Digital Signature
Signed by:
Cling Clang

Authority:
VeriSign, Inc.

Valid from:
10/7/2013 5:30:00 AM

Valid to:
10/8/2014 5:29:59 AM

Subject:
CN=Cling Clang, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Cling Clang, 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:
5D74FBB0061E5BD76029878075B12101

File PE Metadata
Compilation timestamp:
1/31/2014 6:15:28 AM

OS version:
6.1

OS bitness:
Win32

Subsystem:
Native (none required)

Linker version:
9.0

CTPH (ssdeep):
768:7IsHpnKHCBSqUPJHKQpkJxpKwT2bcWiJmOtX3g2rp3lnHIoo:EsHRKHLJqQpkYwTsiTtXxtBo

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:
6.3546

Code size:
37 KB (37,888 bytes)

Driver
Display name:
{1b646e65-56b2-4543-b72c-0e8976cf559e}w

Type:
Kernel device driver (KernelDriver)

Group:
PNP_TDI


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