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opnukg.dll

Irrational Number Applications

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module opnukg.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:
b02fd97e850292e460de28aa0bc3b6cd

SHA-1:
f5f8c23c10bdac5b912d2667cd5941465487f2dd

SHA-256:
10fc2301e9cf6464f77d8dbc05478b70c6746ada8cfbc83d81cfd0803169cb1f

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 5:03:52 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.2.6.3

File size:
1.4 MB (1,494,520 bytes)

Product version:
1.0.0.1

Copyright:
Copyright (C) 2014

File type:
Dynamic link library (Win64 DLL)

Language:
English (United States)

Common path:
C:\ProgramData\rcodkhlzva\dat\opnukg.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 3:42:28 AM

OS version:
5.2

OS bitness:
Win64

Subsystem:
Windows GUI

Linker version:
10.0

Entry address:
0x2A18

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, FF, 2B, 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, 48, 89, 4C, 24, 08, 48, 81, EC, 88, 00, 00, 00, 48, 8D, 0D, 55, C6, 00, 00, FF, 15, 87, 76, 00, 00, 48, 8B, 05, 40, C7, 00, 00, 48, 89, 44, 24, 58, 45, 33, C0, 48, 8D, 54, 24, 60, 48, 8B, 4C, 24, 58, E8, FB, 4B, 00, 00, 48, 89, 44, 24, 50, 48, 83, 7C, 24...
 
[+]

Code size:
34 KB (34,816 bytes)

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