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vmdefa.dll

Irrational Number Applications

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module vmdefa.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)

Version:
1.0.0.1

MD5:
5014b3cea42448d8247f1441071c0875

SHA-1:
13d6853ea4c2dbd9b635f42e2de15bf5580d97ad

SHA-256:
492ab4b7e9e5d5e78712183bb51cdb69cc546b2ec11c3762ceb22bf73029c52a

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:
12/24/2024 5:03:50 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.2.6.3

File size:
1.2 MB (1,277,944 bytes)

Product version:
1.0.0.1

Copyright:
Copyright (C) 2014

File type:
Dynamic link library (Win32 DLL)

Language:
English (United States)

Common path:
C:\ProgramData\rcodkhlzva\dat\vmdefa.dll

Digital Signature
Signed by:
Irrational Number Applications

Authority:
Symantec Corporation

Valid from:
1/20/2015 1:00:00 AM

Valid to:
3/21/2016 12:59:59 AM

Subject:
CN=Irrational Number Applications, O=Irrational Number Applications, L=St. James, S=St. James, C=BB

Issuer:
CN=Symantec Class 3 SHA256 Code Signing CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US

Serial number:
637F0A74512CF65B05B3A5A0241D6624

File PE Metadata
Compilation timestamp:
10/18/2015 3:41:34 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

Entry address:
0x2670

Entry point:
8B, FF, 55, 8B, EC, 83, 7D, 0C, 01, 75, 05, E8, 59, 26, 00, 00, FF, 75, 08, 8B, 4D, 10, 8B, 55, 0C, E8, EC, FE, FF, FF, 59, 5D, C2, 0C, 00, 8B, FF, 55, 8B, EC, 81, EC, 28, 03, 00, 00, A3, 30, BD, 00, 10, 89, 0D, 2C, BD, 00, 10, 89, 15, 28, BD, 00, 10, 89, 1D, 24, BD, 00, 10, 89, 35, 20, BD, 00, 10, 89, 3D, 1C, BD, 00, 10, 66, 8C, 15, 48, BD, 00, 10, 66, 8C, 0D, 3C, BD, 00, 10, 66, 8C, 1D, 18, BD, 00, 10, 66, 8C, 05, 14, BD, 00, 10, 66, 8C, 25, 10, BD, 00, 10, 66, 8C, 2D, 0C, BD, 00, 10, 9C, 8F, 05, 40, BD...
 
[+]

Code size:
28 KB (28,672 bytes)

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