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webshield64.dll

Irrational Number Applications

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module webshield64.dll by Irrational Number Applications has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat.
Publisher:
Irrational Number Applications  (signed and verified)

MD5:
dda07b88a13b2ca3a824be1e38a98c31

SHA-1:
386de2796fe5fa51585183850bc79954d7ee18a2

SHA-256:
b7f9c1b2159e00fcae7239d459c4f64925e4d70c625eec804a2b998824b061c8

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:
12/25/2024 5:14:10 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.IrrationalNumberApplications (M)
15.11.2.14

File size:
1.3 MB (1,392,000 bytes)

File type:
Dynamic link library (Win64 DLL)

Common path:
C:\ProgramData\webshield\webshield64.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 2:42:42 PM

OS version:
5.2

OS bitness:
Win64

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
24576:1mjgvKe9mflyq8Q+JmduzRAj5wb+jovdSyHoZ1RLITOA:4jgvKe9k7GlzRAudnIZ1WTV

Entry address:
0xC7260

Entry point:
48, 89, 5C, 24, 08, 48, 89, 74, 24, 10, 57, 48, 83, EC, 20, 49, 8B, F8, 8B, DA, 48, 8B, F1, 83, FA, 01, 75, 05, E8, 07, C6, 00, 00, 4C, 8B, C7, 8B, D3, 48, 8B, CE, 48, 8B, 5C, 24, 30, 48, 8B, 74, 24, 38, 48, 83, C4, 20, 5F, E9, A7, FE, FF, FF, CC, CC, CC, CC, CC, CC, CC, CC, CC, 66, 66, 0F, 1F, 84, 00, 00, 00, 00, 00, 48, 8B, C1, 49, 83, F8, 08, 72, 53, 0F, B6, D2, 49, B9, 01, 01, 01, 01, 01, 01, 01, 01, 49, 0F, AF, D1, 49, 83, F8, 40, 72, 1E, 48, F7, D9, 83, E1, 07, 74, 06, 4C, 2B, C1, 48, 89, 10, 48, 03...
 
[+]

Entropy:
6.0300

Code size:
903.5 KB (925,184 bytes)

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