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boxrock.dll

Box Rock

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module boxrock.dll by Box Rock has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The file has been seen being downloaded from install-cdn.boxrock.info.
Publisher:
Box Rock  (signed and verified)

Product:
Box Rock

Version:
1.0.0.7

MD5:
8787a0c144becc88005bb75655e6db06

SHA-1:
0f5a6238cc060d38caeecb0c2cfce5b662126ffc

SHA-256:
e9e93a1d0eac8fd22eebdbe5859956205f3babdd3bad2d5904247058fed88a97

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:
12/26/2024 6:03:21 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.BoxRock (M)
16.2.29.19

File size:
262.7 KB (269,032 bytes)

Product version:
1.0.0.7

Copyright:
(c) Box Rock. All rights reserved.

File type:
Dynamic link library (Win32 DLL)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\inetcache\ie\{random}\boxrock.dll

Digital Signature
Signed by:
Box Rock

Authority:
VeriSign, Inc.

Valid from:
10/7/2014 7:00:00 AM

Valid to:
10/3/2015 6:59:59 AM

Subject:
CN=Box Rock, O=Box Rock, 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:
1125198B1C5DF8CC1185255178F1DAFC

File PE Metadata
Compilation timestamp:
3/1/2015 11:18:26 PM

OS version:
6.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:P/i6UU9JriXzSVBQbHHqeRB+Vbm63Av+fkAZZKTDhxC6cEx:P/i6Uy+jSVGnqequj+Zog5m

Entry address:
0xF515

Entry point:
55, 8B, EC, 83, 7D, 0C, 01, 75, 05, E8, EA, 7E, 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, A8, 21, 03, 10, E8, 4C, 02, 00, 00, 33, C0, 40, 8B, 75, 0C, 85, F6, 75, 0C, 39, 35, 0C, 77, 03, 10, 0F, 84, E4, 00, 00, 00, 83, 65, FC, 00, 83, FE, 01, 74, 05, 83, FE, 02, 75, 35, 8B, 0D, C4, 93, 02, 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...
 
[+]

Entropy:
6.0715

Developed / compiled with:
Microsoft Visual C++

Code size:
159 KB (162,816 bytes)

The file boxrock.dll has been seen being distributed by the following URL.

http://install-cdn.boxrock.info/bed?r=2015030213&bet=3

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