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ext_setup.exe

Anton Kulichenko

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 Anton Kulichenko 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:
Anton Kulichenko  (signed and verified)

MD5:
ada91107a4fb2db12d1f1858d7850c80

SHA-1:
db12bf8fb1cf2e15b9f6c21120c59a3f5d716517

SHA-256:
1a69c3ed208938bafb3056ad13953e49ac28d0790fb8af0a793138f71a8978c1

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:
4/25/2024 2:30:51 AM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Gen:Variant.Adware.Dropper.101
1018

Agnitum Outpost
PUA.MultiPlug
7.1.1

AhnLab V3 Security
Malware/Win32.Suspicious
14.04.23

Avira AntiVirus
ADWARE/Adware.Gen7
7.11.144.202

avast!
Win32:MultiPlug-Z [PUP]
2014.9-140423

AVG
Generic_r
2015.0.3496

Bitdefender
Gen:Variant.Adware.Dropper.101
1.0.20.565

Dr.Web
Trojan.Crossrider.37
9.0.1.0113

Emsisoft Anti-Malware
Gen:Variant.Adware.Dropper.101
8.14.04.23.07

ESET NOD32
Win32/AdWare.MultiPlug (variant)
8.9710

F-Prot
W32/MultiPlug.B.gen
v6.4.7.1.166

F-Secure
Gen:Variant.Adware.Dropper.101
11.2014-23-04_4

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

IKARUS anti.virus
Win32.SuspectCrc
t3scan.1.6.1.0

K7 AntiVirus
Adware
13.176.11847

McAfee
PUP-FID!ADA91107A4FB
5600.7152

MicroWorld eScan
Gen:Variant.Adware.Dropper.101
15.0.0.339

NANO AntiVirus
Trojan.Win32.Crossrider.cufkrp
0.28.0.59492

Panda Antivirus
Trj/Genetic.gen
14.04.23.07

Reason Heuristics
PUP.Installer.AntonKulichenko.J
14.4.23.6

Rising Antivirus
PE:Malware.MultiPlug!6.13CF
23.00.65.14421

Sophos
MultiPlug
4.98

VIPRE Antivirus
Trojan.Win32.Generic
28530

File size:
1.5 MB (1,587,352 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:
Anton Kulichenko

Authority:
COMODO CA Limited

Valid from:
12/3/2013 12:00:00 AM

Valid to:
12/3/2014 11:59:59 PM

Subject:
CN=Anton Kulichenko, O=Anton Kulichenko, STREET=Engineering 7, L=Kiev, S=Kiev, PostalCode=01013, C=UA

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
00E406368A873FE17B8962DA09A05F7B2E

File PE Metadata
Compilation timestamp:
3/3/2014 10:29:50 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
49152:sZ9Q1sSzhYbqA5PVf15r6jxpN1rvvSo8rxrI9AKd+:B1sSzhCqA5tf/r6LrRN9A9

Entry address:
0x11EBB

Entry point:
E8, CE, 49, 00, 00, E9, 00, 00, 00, 00, 6A, 14, 68, F8, 32, 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:
7.9004  (probably packed)

Code size:
108 KB (110,592 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=4253304&publisher_id=253&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=12759912&external_id=0&session_id=25519824&hardware_id=29773128&installer_file_name=ext_setup

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