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irsformw4-setup.exe

Web Install

This installer uses the CNET Download.com download manager (private label) in order to provide monetized offerings to end users. These offers could include ad-supported toolbars or various web browser extensions. The application irsformw4-setup.exe by Web Install has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the DownloadCom Spot Install installer. The file has been seen being downloaded from dw.com.com.
Publisher:
Web Install  (signed and verified)

MD5:
369e18789595ba16a3578710c4a25c20

SHA-1:
2de3dd8063919a0bd783d8fe52b1b2ae3886763f

SHA-256:
048cb8993d3c153175385580753f59e7fe702faafcaf1314eb7d03971722bde3

Scanner detections:
1 / 68

Status:
Adware

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Description:
This is also known as bundleware, or downloadware, which is an downloader designed to simply deliver ad-supported offers in the setup routine of an otherwise legitimate software.

Analysis date:
12/29/2024 12:41:04 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.CBS (M)
16.7.28.15

File size:
581.9 KB (595,888 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
DownloadCom Spot Install (using Nullsoft Install System)

Language:
Language Neutral

Digital Signature
Signed by:
Web Install

Authority:
VeriSign, Inc.

Valid from:
3/19/2013 8:00:00 PM

Valid to:
3/19/2016 7:59:59 PM

Subject:
CN=Web Install, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Web Install, L=SAN FRANCISCO, 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:
6F93708E2A9DB00DA7666A9EA9A5FA00

File PE Metadata
Compilation timestamp:
6/22/2012 2:07:51 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:fC+XBEFsXqDunAjSvvpAIBeyGhI09OrbRHtB:fC+XBk76AuXatv994bRNB

Entry address:
0x333B

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, B0, 73, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, C0, 70, 40, 00, 53, FF, 15, 88, 72, 40, 00, 6A, 08, A3, B8, 3C, 42, 00, E8, 2C, 25, 00, 00, 53, 68, 60, 01, 00, 00, A3, C0, 3B, 42, 00, 8D, 44, 24, 38, 50, 53, 68, 43, 74, 40, 00, FF, 15, 64, 71, 40, 00, 68, 38, 74, 40, 00, 68, C0, 33, 42, 00, E8, 1D, 24, 00, 00, FF, 15, BC, 70, 40, 00, 50, BF, 00, 90, 42, 00, 57, E8, 0B, 24, 00, 00...
 
[+]

Entropy:
7.9355

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file irsformw4-setup.exe has been seen being distributed by the following URL.

http://dw.com.com/redir?edId=3&tag=sem_dlnow&lop=google_sem&pid=11211939&mfgId=6314332&merId=6314332&ctype=dm;language&cval=CBSI;en&spi=494576cc97699066b4b0ee4350feb6f3&destUrl=http://.../dlcom?dlc=n&c=semseous&s=sokrati&part=sokrati&pid=dlcom_sem&aid=458IEQTC95DS9G&gclid=CLa217Sc5bkCFU-Z4Aodn2gAIg&psetid=10973599&geo&oid=3028-2047_4-10973599&ontId=2047_4&siteId=4&pguid=8213225e6e021eae3b78454c

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