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ext_setup.exe

Kiril Klimko

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 Kiril Klimko has been detected as adware by 24 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:
Kiril Klimko  (signed and verified)

MD5:
9602452b5c38fa2fabd756b6ba48a9b2

SHA-1:
fb4e0f89f4482dc9eec431c922fb1d39a54045ff

SHA-256:
efee662261ddb1a3deaea42ffadebb703d4b8e76d671999d079bf26fb4d7e856

Scanner detections:
24 / 68

Status:
Adware

Explanation:
JustPlugIt cross-browser extension/BHO delivered via adware installer (WebPick InstalleRex) and includes background service (AssistantSvc). Randomizes files names.

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:
4/23/2024 6:10:15 AM UTC  (today)

Scan engine
Detection
Engine version

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

Agnitum Outpost
PUA.MultiPlug
7.1.1

AhnLab V3 Security
Adware/Win32.Agent
14.04.24

Avira AntiVirus
ADWARE/Adware.Gen7
7.11.145.40

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

AVG
Generic5
2015.0.3494

Bitdefender
Gen:Variant.Adware.Dropper.101
1.0.20.570

Comodo Security
Application.Win32.Multiplug.R
18160

Dr.Web
Trojan.Crossrider.5139
9.0.1.0114

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

ESET NOD32
Win32/AdWare.MultiPlug (variant)
8.9718

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

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

IKARUS anti.virus
Win32.SuspectCrc
t3scan.1.6.1.0

K7 AntiVirus
Unwanted-Program
13.176.11873

Malwarebytes
PUP.Optional.MultiPlug.A
v2014.04.24.12

McAfee
PUP-FID!9602452B5C38
5600.7150

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

NANO AntiVirus
Trojan.Win32.Crossrider.cvopfn
0.28.0.59492

Panda Antivirus
Trj/Genetic.gen
14.04.24.12

Reason Heuristics
PUP.Installer.KirilKlimko.J
14.4.24.11

Rising Antivirus
PE:Malware.MultiPlug!6.13CF
23.00.65.14422

Sophos
MultiPlug
4.98

VIPRE Antivirus
JustPlugIt
28570

File size:
657.3 KB (673,072 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:
Kiril Klimko

Authority:
COMODO CA Limited

Valid from:
9/3/2013 1:00:00 AM

Valid to:
9/4/2014 12:59:59 AM

Subject:
CN=Kiril Klimko, O=Kiril Klimko, STREET=Perova 21, L=Kiev, S=Kiev, PostalCode=02125, C=UA

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

Serial number:
4F8445DA07CAF9C24D869920925BA182

File PE Metadata
Compilation timestamp:
3/16/2014 12:34:27 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
12288:s/36Cpd8FZTSYTcpDVZWA5yUe2tSehD8sFQapr2paukVc:s/3ZkZTJQpP5bSePFn2xkVc

Entry address:
0x10A4B

Entry point:
E8, 3E, 4A, 00, 00, E9, 00, 00, 00, 00, 6A, 14, 68, B8, 21, 42, 00, E8, 1F, 21, 00, 00, E8, E0, 07, 00, 00, 0F, B7, F0, 6A, 02, E8, D1, 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, 90, 37, 00, 00, 85, C0, 75, 08, 6A, 1C, E8, DC, 00, 00, 00, 59, E8...
 
[+]

Entropy:
7.7654  (probably packed)

Code size:
103 KB (105,472 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=4304706&publisher_id=304&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=12914118&external_id=0&session_id=25828236&hardware_id=30132942&installer_file_name=ext_setup

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