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ext_setup.exe

Sergei Ivanovich Drozdov

The is the installer for the WebPick InstalleRex download manager which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed without consent. The application ext_setup.exe by Sergei Ivanovich Drozdov has been detected as adware by 23 anti-malware scanners. The program is a setup application that uses the WebPick InstalleRex installer. It is built using the Crossrider cross-browser extension platform. While the file utilizes the Crossrider framework and delivery services, it is not owned by Crossrider.
Publisher:
Sergei Ivanovich Drozdov  (signed and verified)

MD5:
7f41417efb16be148b66908949ae71d6

SHA-1:
1a62ed1ccdd4bab562ec919d8ac364387b1d427c

SHA-256:
f62354bc06a8bdec82362aa6584692f7bb0acb01f68aebc711a2702b3787f339

Scanner detections:
23 / 68

Status:
Adware

Explanation:
The software may change the browser's home page and search provider settings as well as display advertisements.

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:
4/27/2024 3:38:28 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Gen:Variant.Adware.Dropper.101
1016

Agnitum Outpost
PUA.Agent
7.1.1

Avira AntiVirus
ADWARE/Adware.Gen7
7.11.145.40

avast!
Win32:MultiPlug-AN [PUP]
2014.9-140424

AVG
Generic_r
2015.0.3494

Bitdefender
Gen:Variant.Adware.Dropper.101
1.0.20.570

Comodo Security
Application.Win32.Multiplug.R
18160

Dr.Web
Trojan.Crossrider.12895
9.0.1.0114

Emsisoft Anti-Malware
Gen:Variant.Adware.Dropper.101
8.14.04.24.12

ESET NOD32
Win32/AdWare.MultiPlug
8.9718

F-Secure
Gen:Variant.Adware.Dropper.101
11.2014-24-04_5

G Data
Gen:Variant.Adware.Dropper.101
14.4.24

K7 AntiVirus
Unwanted-Program
13.176.11873

Kaspersky
not-a-virus:AdWare.Win32.MultiPlug
14.0.0.3967

McAfee
PUP-FID!7F41417EFB16
5600.7150

MicroWorld eScan
Gen:Variant.Adware.Dropper.101
15.0.0.342

NANO AntiVirus
Trojan.Win32.Crossrider.cwpxlg
0.28.0.59492

Panda Antivirus
Trj/Genetic.gen
14.04.24.12

Reason Heuristics
PUP.Installer.SergeiIvanovichDrozdov.J
14.4.24.11

Rising Antivirus
PE:Malware.MultiPlug!6.13CF
23.00.65.14422

Sophos
MultiPlug
4.98

Vba32 AntiVirus
AdWare.Win64.MultiPlag
3.12.26.0

VIPRE Antivirus
Trojan.Win32.Generic
28570

File size:
1.5 MB (1,612,232 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
WebPick InstalleRex

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

Digital Signature
Signed by:
Sergei Ivanovich Drozdov

Authority:
Unizeto Technologies S.A.

Valid from:
1/8/2014 1:24:34 PM

Valid to:
1/8/2015 1:24:34 PM

Subject:
E=drozdov54@hotmail.com, CN="Open Source Developer, Sergei Ivanovich Drozdov", OU=Sedro Soft, O=Sergei Ivanovich Drozdov, C=RU

Issuer:
CN=Certum Level III CA, OU=Certum Certification Authority, O=Unizeto Technologies S.A., C=PL

Serial number:
4E05AFB21C1318DB8A2C0669760C9050

File PE Metadata
Compilation timestamp:
4/10/2014 11:39:17 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
24576:hcTRZsRxIcfSPyQXpg/erzn5fxfyyE9czT4Oj3so9GI8M/pJNZLoBhE/RaNyhJi1:yZAI+SPl+/kz5FWcNICRnRqwRaNyn0

Entry address:
0x1085B

Entry point:
E8, CE, 49, 00, 00, E9, 00, 00, 00, 00, 6A, 14, 68, 00, 21, 42, 00, E8, AF, 20, 00, 00, E8, E0, 07, 00, 00, 0F, B7, F0, 6A, 02, E8, 61, 49, 00, 00, 59, B8, 4D, 5A, 00, 00, 66, 39, 05, 00, 00, 40, 00, 74, 04, 33, DB, EB, 33, A1, 3C, 00, 40, 00, 81, B8, 00, 00, 40, 00, 50, 45, 00, 00, 75, EB, B9, 0B, 01, 00, 00, 66, 39, 88, 18, 00, 40, 00, 75, DD, 33, DB, 83, B8, 74, 00, 40, 00, 0E, 76, 09, 39, 98, E8, 00, 40, 00, 0F, 95, C3, 89, 5D, E4, E8, 20, 37, 00, 00, 85, C0, 75, 08, 6A, 1C, E8, DC, 00, 00, 00, 59, E8...
 
[+]

Entropy:
7.9065  (probably packed)

Code size:
102.5 KB (104,960 bytes)

The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to r1.stylezip.info  (54.186.255.26:80)

TCP (HTTP):
Connects to c1.stylezip.info  (54.186.255.26:80)

 
http://c1.stylezip.info/?step_id=1&installer_id=4305338&publisher_id=305&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=12916014&external_id=0&session_id=25832028&hardware_id=30137366&installer_file_name=ext_setup

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