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setup.exe

BEst inSTall TLl

This is the OutBrowse Revenyou installer which bundles offers for additional third party applications that may be unwanted and installed without consent. The application setup.exe by BEst inSTall TLl 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 an Internet Explorer cache folder. The file has been seen being downloaded from download.file8desktop.com.
Publisher:
AJAZX  (signed by BEst inSTall TLl)

Product:
AJAZX

Version:
8065.15817.1197.8462

MD5:
936790005089c975dc9c96a0eb7196af

SHA-1:
a808ad7737ee9da22202c390d21d9a58b1418417

SHA-256:
812cd9db60ccfd434592644b97c6bce778b600cba36d57db13871d280efc5d53

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:
4/16/2025 10:07:22 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Outbrowse.BEstinST.Bundler (M)
16.5.19.20

File size:
771 KB (789,464 bytes)

Product version:
8065.15817.1197.8462

Copyright:
AJAZX

Trademarks:
AJAZX

File type:
Executable application (Win32 EXE)

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

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\setup.exe

Digital Signature
Signed by:
BEst inSTall TLl

Authority:
thawte, Inc.

Valid from:
6/30/2015 1:00:00 AM

Valid to:
1/27/2016 11:59:59 PM

Subject:
CN=BEst inSTall TLl, O=BEst inSTall TLl, L=Dublin, S=Dublin, C=IE

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

Serial number:
505027BABCC52AD6A1AB7C1CB900B9B9

File PE Metadata
Compilation timestamp:
12/5/2009 10:52:12 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:Q2Ld/eq54F97A/vxbbvFczkKU2f8KqBGQwzcbRqaRWl/4E8lzdfc8vy4h:bLd/S9M/J/vY/LkVBGQusxRy/tD86

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, 1C, 45, 00, E8, F1, 2B, 00, 00, A3, 64, 1B, 45, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 98, 37, 43, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 60, DB, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, A0, 47, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

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

http://download.file8desktop.com/1439801899/.../1439801899?39868943095ZFxsLy02bG9sNCwjZzUtKCkuI2Q0LS0pMTEeYzkuNjAvI2U1Kh5bLToxKCstKB5eKjQpLiZbLjokKSBcKzkqMR1fMjQlKx5dZWllZVxqXDVtXWtxbSZaZ2ZaY2NcNHNMUyg0Tz0qOzwwP0lPPEgtLTxFRkIyPiZgXmxlNTMsHWxvbDQs

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