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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:
a927d81ea73028ac21d4ce4e5909a1d9

SHA-1:
c9245283b76c9b5097ee40931d37cccac9f9673e

SHA-256:
b9a8872d0959a3e3f8454942f386906a9e1c8aa1ac23d4cafcb2b16a97868325

Scanner detections:
23 / 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:
4/25/2024 10:26:16 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Gen:Variant.Adware.Dropper.101
1017

Agnitum Outpost
PUA.Agent
7.1.1

AhnLab V3 Security
Adware/Win32.Agent
14.04.23

Avira AntiVirus
ADWARE/Adware.Gen7
7.11.145.10

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

AVG
Generic_r
2015.0.3495

Bitdefender
Gen:Variant.Adware.Dropper.101
1.0.20.565

Comodo Security
Application.Win32.Multiplug.R
18157

Dr.Web
Trojan.Crossrider.12895
9.0.1.0113

Emsisoft Anti-Malware
Gen:Variant.Adware.Dropper.101
8.14.04.23.08

ESET NOD32
Win32/AdWare.MultiPlug
8.9714

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

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

K7 AntiVirus
Unwanted-Program
13.176.11861

Kaspersky
not-a-virus:AdWare.Win32.MultiPlug
14.0.0.3971

McAfee
PUP-FID!A927D81EA730
5600.7151

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

NANO AntiVirus
Trojan.Win32.Crossrider.cwpxlg
0.28.0.59492

Panda Antivirus
Trj/Genetic.gen
14.04.23.08

Reason Heuristics
PUP.Installer.SergeiIvanovichDrozdov.J
14.4.23.19

Rising Antivirus
PE:Malware.MultiPlug!6.13CF
23.00.65.14421

Sophos
MultiPlug
4.98

VIPRE Antivirus
JustPlugIt
28550

File size:
695.1 KB (711,752 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 10:24:34 AM

Valid to:
1/8/2015 10:24:34 AM

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 8:39:17 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
12288:ecJYyGCbzZs99PiFUI55UnnxB10iSyVcV8EnNYBn5AWrjQ+Mpgvuk5RLEUdzA:ecTRZs99ahLUnx4kciENYB5AajP2gvbe

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:
7.7765  (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=4274170&publisher_id=274&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=12822510&external_id=0&session_id=25645020&hardware_id=29919190&installer_file_name=ext_setup

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