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webshield.dll

Irrational Number Applications

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module webshield.dll by Irrational Number Applications has been detected as adware by 13 anti-malware scanners. According to AVG, this software downloads additional adware offers during setup.
Publisher:
Irrational Number Applications  (signed and verified)

MD5:
e0af941bb432058e20091a975a87770f

SHA-1:
dc54b7f8eec6a61877654201013873e776af0b85

SHA-256:
7dcb93ae18c536ced1c308577214289e26b0fb91933948b7cef0d492c1153111

Scanner detections:
13 / 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:
12/25/2024 5:46:07 AM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
ADWARE/Adware.Gen
8.3.1.6

AVG
Downloader
2016.0.2937

Baidu Antivirus
Adware.MSIL.PullUpdate
4.0.3.15112

ESET NOD32
MSIL/Adware.PullUpdate (variant)
9.11942

Fortinet FortiGate
Adware/PullUpdate
11/2/2015

Kaspersky
not-a-virus:AdWare.MSIL.PullUpdate
14.0.0.1182

Malwarebytes
PUP.Optional.PullUpdate.C
v2015.11.02.02

NANO AntiVirus
Riskware.Win32.PullUpdate.dovyyr
0.30.24.2487

Panda Antivirus
Generic Suspicious
15.11.02.02

Reason Heuristics
PUP.Yontoo.IrrationalNumberApplications (M)
15.11.2.14

Rising Antivirus
PE:Adware.PullUpdate!6.225B
23.00.65.151031

VIPRE Antivirus
PullUpdate
42020

Zillya! Antivirus
Adware.SaMon.Win32.74
2.0.0.2291

File size:
1.1 MB (1,187,200 bytes)

File type:
Dynamic link library (Win32 DLL)

Common path:
C:\ProgramData\webshield\webshield.dll

Digital Signature
Signed by:
Irrational Number Applications

Authority:
VeriSign, Inc.

Valid from:
2/25/2014 7:00:00 PM

Valid to:
2/26/2015 6:59:59 PM

Subject:
CN=Irrational Number Applications, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Irrational Number Applications, L=St. James, S=St. James, C=BB

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:
68A3A4FCF1FE292BB14A5717D3754944

File PE Metadata
Compilation timestamp:
10/14/2014 2:41:24 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
24576:4sHjg1Mlkv0EmkU0zkD99PG9VsH9Q31uvxr4TVO0St+1:lk1WG0Xkj9VsH2MvSTVvSt+1

Entry address:
0xB0F94

Entry point:
8B, FF, 55, 8B, EC, 83, 7D, 0C, 01, 75, 05, E8, 44, C1, 00, 00, FF, 75, 08, 8B, 4D, 10, 8B, 55, 0C, E8, EC, FE, FF, FF, 59, 5D, C2, 0C, 00, CC, CC, CC, CC, CC, CC, CC, CC, CC, 8B, 54, 24, 0C, 8B, 4C, 24, 04, 85, D2, 74, 69, 33, C0, 8A, 44, 24, 08, 84, C0, 75, 16, 81, FA, 80, 00, 00, 00, 72, 0E, 83, 3D, 34, 91, 11, 45, 00, 74, 05, E9, 97, C1, 00, 00, 57, 8B, F9, 83, FA, 04, 72, 31, F7, D9, 83, E1, 03, 74, 0C, 2B, D1, 88, 07, 83, C7, 01, 83, E9, 01, 75, F6, 8B, C8, C1, E0, 08, 03, C1, 8B, C8, C1, E0, 10, 03...
 
[+]

Entropy:
6.2699

Code size:
821 KB (840,704 bytes)

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