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f_000039

Start NOW

This is the OutBrowse Revenyou installer which bundles offers for additional third party applications that may be unwanted and installed without consent. The file f_000039 by Start NOW 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 OutBrowse Revenyou installer. It is also typically executed from the user's temporary directory.
Publisher:
Start NOW  (signed and verified)

MD5:
4c0bb0c6c1ee8de3c04064fe7c26a51c

SHA-1:
0b2cf341256876f7ed13d71a0e36022b40af18bc

SHA-256:
089837a9bd36a4ada58541179fc5c462b8d4ef7c47c9a4ee4c0cafdbfa9f68da

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:
11/23/2024 6:10:20 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Outbrowse (M)
16.9.23.21

File size:
571.5 KB (585,208 bytes)

Bundler/Installer:
OutBrowse Revenyou (using Nullsoft Install System)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\temp\webkit\cache\f_000039

Digital Signature
Signed by:
Start NOW

Authority:
thawte, Inc.

Valid from:
1/26/2015 5:00:00 AM

Valid to:
12/12/2015 4:59:59 AM

Subject:
CN=Start NOW, O=Start NOW, L=Dublin, S=Dublin, C=IE

Issuer:
CN=thawte SHA256 Code Signing CA, O="thawte, Inc.", C=US

Serial number:
4A33FB1D83BE0A3584CABB3B38966358

File PE Metadata
Compilation timestamp:
12/6/2009 3:50:52 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:LjtzSV/OlUiTLLte4eOqMzXEibT3SaVxv7Zr9BB2Mg3vZj:LjtocUiTLpOOpUivtVrd2f/N

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...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

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