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plurpush_ob.exe

PlurPush

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application plurpush_ob.exe by PlurPush has been detected as adware by 4 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from dl1.downserver2.com and multiple other hosts.
Publisher:
PlurPush  (signed and verified)

MD5:
6cbb7431e063707ab645ace22424050a

SHA-1:
5ea307c13114afa72f95b27d1b35d8c78bc4f5ad

SHA-256:
1ba541424f2c20617ae160863d4949ee025c88b735de642826c4f62b8c30e080

Scanner detections:
4 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
4/24/2024 10:38:02 PM UTC  (today)

Scan engine
Detection
Engine version

ESET NOD32
Win32/BrowseFox
7.9123

herdProtect (fuzzy)
variant of divapton_sm.exe (Adware)
2014.1.5.20

Reason Heuristics
PUP.PlurPush.L
14.8.8.0

Rising Antivirus
NS:PUF.SilenceInstaller!1.9DDF
23.00.65.131227

File size:
198.8 KB (203,536 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\plurpush_ob.exe

Digital Signature
Signed by:
PlurPush

Authority:
VeriSign, Inc.

Valid from:
9/18/2013 5:00:00 PM

Valid to:
9/19/2015 4:59:59 PM

Subject:
CN=PlurPush, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=PlurPush, 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:
30ACE095C6EE9F3C39428EB86ECAFADF

File PE Metadata
Compilation timestamp:
12/5/2009 2:50:41 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
3072:cLk395hYXJsCEn3FkS9XPcCZT9anH7l1m/GqMHJGULvNh:cQqDy3FkGPPhYnH7nm/G/Hc8

Entry address:
0x30CB

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 38, 3F, 42, 00, E8, F1, 2B, 00, 00, A3, 84, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 36, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.8962

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

The file plurpush_ob.exe has been seen being distributed by the following 2 URLs.

http://dl1.downserver2.com/Installer/.../PlurPush_ob.exe

http://cdn.download4desktop.com/Installer/.../PlurPush_ob.exe

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