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ysp_inst.exe

Yahoo! Inc.

The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. The file has been seen being downloaded from download.yimg.com and multiple other hosts.
Publisher:
Yahoo! Inc.  (signed and verified)

Description:
Yahoo! Search Protection Setup

Version:
2010.04.01.01

MD5:
ed668920b9e40224ee211930b2cd70aa

SHA-1:
3b91720889f57840620d3871112d035fa7dfb24d

SHA-256:
dd197a9d70636ca5c2efecd734d5719d73beda2564fcc386a2ada9aeb670a680

Scanner detections:
0 / 68

Status:
Clean (as of last analysis)

Analysis date:
12/25/2024 5:32:20 PM UTC  (today)

File size:
842.6 KB (862,872 bytes)

Copyright:
Copyright (c) 2010 Yahoo! Inc.

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
English (United States)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\ysp_inst.exe

Digital Signature
Signed by:
Yahoo! Inc.

Authority:
VeriSign, Inc.

Valid from:
8/13/2009 1:00:00 AM

Valid to:
9/3/2012 12:59:59 AM

Subject:
CN=Yahoo! Inc., OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Yahoo! Inc., L=Santa Clara, S=CA, C=US

Issuer:
CN=VeriSign Class 3 Code Signing 2009-2 CA, OU=Terms of use at https://www.verisign.com/rpa (c)09, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
3D7A9A7D12556AB8688CA048C60F6018

File PE Metadata
Compilation timestamp:
9/5/2007 7:41:10 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
24576:OBpmFrOaIBS8oXfi/niekLi6s9tiGc5iV0uzyYXwql:OhxBSvfi/3kkiGD0uzvwql

Entry address:
0x33B9

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, DB, 5E, 89, 5C, 24, 18, C7, 44, 24, 10, 40, 86, 40, 00, 89, 5C, 24, 14, FF, 15, 30, 80, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 80, 40, 00, 53, FF, 15, AC, 82, 40, 00, 6A, 08, A3, 14, A6, 42, 00, E8, 0D, 26, 00, 00, 53, 68, B4, 02, 00, 00, A3, 60, A5, 42, 00, 8D, 44, 24, 38, 50, 53, 68, 38, 86, 40, 00, FF, 15, 7C, 81, 40, 00, 68, 20, 86, 40, 00, 68, 60, 95, 42, 00, E8, DD, 24, 00, 00, FF, 15, B0, 80, 40, 00, 50, BF, 00, 50, 43, 00, 57, E8, CB, 24, 00, 00...
 
[+]

Entropy:
7.9871

Packer / compiler:
Nullsoft install system v2.x

Code size:
24.5 KB (25,088 bytes)

The file ysp_inst.exe has been seen being distributed by the following 3 URLs.

http://download.yimg.com/ycs/msg/dl/msgr10/.../ysp_setup_2.0.1.13.exe

http://xp.yimg.com/gj/msgr/11/.../ysp_setup_2.0.1.13.exe

http://c-yspsetup20113exe.a-ymessenger.http.atlas.cdn.yimg.com/ymessenger/dl/msgr11/.../ysp_setup_2.0.1.13.exe

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