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yosetup.exe

Pavel Repkin

The application yosetup.exe by Pavel Repkin 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. The installer uses the OpenCandy monitzation platform which will donwload and install offers in the setup for potentially unwanted software including ad/search-supported toolbars. The file has been seen being downloaded from letoltes.szoftverbazis.hu.
Publisher:
Pavel Repkin  (signed and verified)

MD5:
84fb3438fc7d941f6788a8f97a9a283a

SHA-1:
b9ad1ce2abb0338aea18fbb9598c933acb0ba9dd

SHA-256:
779c3eac41e0fd26e5113808216c1ad41f320251cc08a02e6d3b85d12ebc6f6a

Scanner detections:
4 / 68

Status:
Adware

Explanation:
Packages the OpenCandy software bundler that offers to install additional software and may include web browser add-ons and toolbars which display advertising (based on publisher settings and geo context).

Analysis date:
4/25/2024 7:07:55 AM UTC  (today)

Scan engine
Detection
Engine version

ESET NOD32
Win32/OpenCandy
8.9475

Malwarebytes
PUP.Optional.OpenCandy
v2014.08.03.12

NANO AntiVirus
Trojan.Win32.OpenCandy.bkjxxi
0.28.0.58101

Reason Heuristics
PUP.Installer.PavelRepkin.H
14.8.3.12

File size:
6.1 MB (6,448,184 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\downloads\yosetup.exe

Digital Signature
Signed by:
Pavel Repkin

Authority:
StartCom Ltd.

Valid from:
8/30/2011 4:17:25 AM

Valid to:
8/30/2013 11:50:27 AM

Subject:
E=pavel.repkin@gmail.com, CN=Pavel Repkin, L=Saint Petersburg, S=Saint Petersburg City, C=RU, Description=496726-6lnbyJoXvJM0x5wb

Issuer:
CN=StartCom Class 2 Primary Intermediate Object CA, OU=Secure Digital Certificate Signing, O=StartCom Ltd., C=IL

Serial number:
03ED

File PE Metadata
Compilation timestamp:
12/5/2009 11:50:52 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
196608:EFKVPmwN+CqaZPXEnSL2YHfA/dXLW5g5CO:thZpaKfAVgg5D

Entry address:
0x30FA

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, 18, EC, 42, 00, E8, F1, 2B, 00, 00, A3, 64, EB, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 98, 8F, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 60, E3, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 40, 43, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9931

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

The file yosetup.exe has been seen being distributed by the following URL.

http://letoltes.szoftverbazis.hu/NDs8GGwx15kOqOuL_5MkiA/1477937022/.../yosetup3.exe

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