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{a52b5623-8d2f-4c30-8a4b-02fe1cbbce0f}.dll

High Stairs

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module {a52b5623-8d2f-4c30-8a4b-02fe1cbbce0f}.dll by High Stairs has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It is also typically executed from the user's temporary directory.
Publisher:
High Stairs  (signed and verified)

Version:
1.0.5728.10368

MD5:
a335bfeec77493e5da2512682afd5211

SHA-1:
05d37500cca756f118733e3373bf1a27e8950b7c

SHA-256:
12fa44307a1d65dbf1276d298c88fa4b5081ee762a80454086a0ba518ba4e650

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:
4/26/2024 7:04:55 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo (M)
17.3.16.11

File size:
533.7 KB (546,528 bytes)

Product version:
1.0.5728.10368

File type:
Dynamic link library (Win32 DLL)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\temp\{a52b5623-8d2f-4c30-8a4b-02fe1cbbce0f}.dll

Digital Signature
Signed by:
High Stairs

Authority:
VeriSign, Inc.

Valid from:
6/8/2015 2:00:00 AM

Valid to:
6/8/2016 1:59:59 AM

Subject:
CN=High Stairs, O=High Stairs, 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:
6698E8E8576717D380DB0BBF631821E1

File PE Metadata
Compilation timestamp:
9/7/2015 2:45:47 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

Entry address:
0x1C8DC

Entry point:
55, 8B, EC, 83, 7D, 0C, 01, 75, 05, E8, A2, 8D, 00, 00, FF, 75, 10, FF, 75, 0C, FF, 75, 08, E8, 07, 00, 00, 00, 83, C4, 0C, 5D, C2, 0C, 00, 6A, 0C, 68, 40, 5D, 05, 10, E8, 75, 2E, 00, 00, 33, C0, 40, 8B, 75, 0C, 85, F6, 75, 0C, 39, 35, CC, FF, 07, 10, 0F, 84, E4, 00, 00, 00, 83, 65, FC, 00, 83, FE, 01, 74, 05, 83, FE, 02, 75, 35, 8B, 0D, BC, 65, 04, 10, 85, C9, 74, 0C, FF, 75, 10, 56, FF, 75, 08, FF, D1, 89, 45, E4, 85, C0, 0F, 84, B1, 00, 00, 00, FF, 75, 10, 56, FF, 75, 08, E8, 11, FE, FF, FF, 89, 45, E4...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
274.5 KB (281,088 bytes)

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