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yt8jex.exe

Yahoo Japan Corporation

The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. The file has been seen being downloaded from downloads.yahoo.co.jp.
Publisher:
Yahoo Japan Corporation.  (signed by Yahoo Japan Corporation)

Description:
Yahoo! JAPAN Toolbar Installer

Version:
8.0.0.5

MD5:
da1a6108c2f07820ad5c0d86ec356018

SHA-1:
2999da7397f90f168b5f67231d4551fb0905dc0f

SHA-256:
49685e6f8c88f0c95aab769d3bf19eeeae9c9c9ed65283e29643db8770e10a9f

Scanner detections:
0 / 68

Status:
Clean (as of last analysis)

Analysis date:
12/29/2024 12:59:15 AM UTC  (today)

File size:
2.3 MB (2,441,848 bytes)

Copyright:
Copyright (c) 2008-2014 Yahoo Japan Corporation.

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\yt8jex.exe

Digital Signature
Signed by:
Yahoo Japan Corporation

Authority:
Symantec Corporation

Valid from:
3/23/2015 9:00:00 AM

Valid to:
3/30/2016 8:59:59 AM

Subject:
CN=Yahoo Japan Corporation, OU=Yahoo Japan Corporation, O=Yahoo Japan Corporation, L=Minato-ku, S=Tokyo, C=JP

Issuer:
CN=Symantec Class 3 SHA256 Code Signing CA, OU=Symantec Trust Network, O=Symantec Corporation, C=US

Serial number:
2FA015DFAF46B01751217F762037B5F4

File PE Metadata
Compilation timestamp:
2/25/2012 4:19:59 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
49152:axOWgbOUjAPJXIh0tGMuNLCPV9PjGkEU2T6NtoViggXcLipb4vBCNLAe0:iOWgbO8APJ4h0MMuN2PV9rGkv2T4oViu

Entry address:
0x39E3

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, D8, 91, 40, 00, 89, 6C, 24, 14, FF, 15, 30, 80, 40, 00, 68, 01, 80, 00, 00, FF, 15, B8, 80, 40, 00, 55, FF, 15, C0, 82, 40, 00, 6A, 08, A3, B8, 2E, 47, 00, E8, 37, 2A, 00, 00, 55, 68, B4, 02, 00, 00, A3, D0, 2D, 47, 00, 8D, 44, 24, 38, 50, 55, 68, 1C, 93, 40, 00, FF, 15, 84, 81, 40, 00, 68, 04, 93, 40, 00, 68, C0, AD, 46, 00, E8, 19, 27, 00, 00, FF, 15, B4, 80, 40, 00, 50, BF, A0, 30, 4C, 00, 57, E8, 07, 27, 00, 00...
 
[+]

Entropy:
7.9845

Packer / compiler:
Nullsoft install system v2.x

Code size:
28 KB (28,672 bytes)

The file yt8jex.exe has been seen being distributed by the following URL.

http://downloads.yahoo.co.jp/toolbar/dl/.../yt8jex.exe

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