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download.exe

Stas Kosmov

This is a WebPick installer that bundles (with very minimal user consent) a number of adware browser extensions using the JustPlug.it browser framework. The application download.exe, “Installer for TopApp soft” by Stas Kosmov has been detected as adware by 32 anti-malware scanners. The program is a setup application that uses the WebPick InstalleRex (Tarma) installer. The setup program uses Web-Pick's InstalleRex download manager and installer to bundle potentially unwanted ad-supported software which includes toolbars and browser extensions through a pay-per-install monetization scheme.
Publisher:
TopApp soft  (signed by Stas Kosmov)

Product:
TopApp soft

Description:
Installer for TopApp soft

Version:
2014.5.26.2303

MD5:
8f930bf91a3a817ba597c8c1ba13b901

SHA-1:
d2f126fb355df855478a43c64605c70739538430

SHA-256:
e7ebbef77ae89d263594eeecd05f5dc8f077ab5087c6748a78ba91ca85a6bd52

Scanner detections:
32 / 68

Status:
Adware

Explanation:
Uses the InstalleRex from WebPick Internet Holdings to install bundled add-ons including toolbars and other web browser extensions.

Analysis date:
4/23/2024 12:45:33 PM UTC  (today)

Scan engine
Detection
Engine version

Lavasoft Ad-Aware
Application.Generic.658208
826

Agnitum Outpost
Trojan.AntiFW
7.1.1

AhnLab V3 Security
PUP/Win32.TSULoader
14.10.31

Avira AntiVirus
TR/AntiFW.b.106
7.11.151.230

avast!
Win32:InstalleRex-BX [PUP]
141025-0

AVG
Generic
2015.0.3304

Bitdefender
Application.Generic.658208
1.0.20.1520

Bkav FE
W32.FamVT.AntiFWK.Trojan
1.3.0.4959

Clam AntiVirus
Win.Trojan.Antifw-7
0.98/19501

Comodo Security
Application.Win32.InstalleRex.KG
18356

Dr.Web
Trojan.WebPick.2627
9.0.1.05190

Emsisoft Anti-Malware
Trojan.Generic.11424889
14.10.31

ESET NOD32
Win32/InstalleRex.M potentially unwanted application
7.0.302.0

Fortinet FortiGate
Riskware/Generic.AC.4161048
10/31/2014

F-Secure
Application.Generic.658208
11.2014-31-10_6

G Data
Application.Generic.658208
14.10.24

K7 AntiVirus
Unwanted-Program
13.183.13642

Kaspersky
Trojan.Win32.AntiFW
15.0.0.494

Malwarebytes
PUP.Optional.InstalleRex
v2014.10.31.08

McAfee
PUP-FHQ!BF89A43735FC
5600.6960

MicroWorld eScan
Application.Generic.658208
15.0.0.912

NANO AntiVirus
Riskware.Win32.InfoLeak.cvgqot
0.28.0.59921

nProtect
Trojan/W32.AntiFW.322584
14.10.10.01

Panda Antivirus
PUP/TSUploader
14.10.31.08

Qihoo 360 Security
Malware.QVM20.Gen
1.0.0.1015

Quick Heal
Trojan.AntiFW.A5
10.14.14.00

Reason Heuristics
Adware.WebPick.Installer.I
14.10.31.20

Rising Antivirus
PE:Trojan.AntiFW!6.17F7
23.00.65.141029

Sophos
InstallRex
4.98

Vba32 AntiVirus
Downloader.AdLoad
3.12.26.0

VIPRE Antivirus
Threat.4150696
29560

Zillya! Antivirus
Trojan.AntiFW.Win32.221
2.0.0.1807

File size:
315.1 KB (322,616 bytes)

Product version:
1.0.0.3

Copyright:
Copyright © 2014 TopApp soft

Original file name:
TSULoader.exe

File type:
Executable application (Win32 EXE)

Installer:
WebPick InstalleRex (Tarma)

Common path:
C:\users\{user}\downloads\download.exe

Digital Signature
Signed by:
Stas Kosmov

Authority:
COMODO CA Limited

Valid from:
9/24/2013 1:00:00 AM

Valid to:
9/25/2014 12:59:59 AM

Subject:
CN=Stas Kosmov, O=Stas Kosmov, STREET=Levitana 21, L=Kiev, S=Kiev, PostalCode=03083, C=UA

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

Serial number:
7A2834207C5588F506D3CF09661E12F2

File PE Metadata
Compilation timestamp:
3/12/2013 8:51:45 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
6144:BrYbUzkuvcBYC47l2xa6g4FhwjZd/9d1XKxlo/ecwrHs54M:BrdkuveY36kjZP/XKxlSZAH6

Entry address:
0x14DB

Entry point:
55, 8B, EC, 81, EC, 2C, 06, 00, 00, 53, 56, 33, DB, 57, 66, 89, 9D, DC, FB, FF, FF, 89, 5D, F4, 89, 5D, FC, FF, 15, 74, 30, 40, 00, A3, 08, 44, 40, 00, FF, 15, 70, 30, 40, 00, 8B, F8, 8D, 45, EC, 50, FF, 15, 6C, 30, 40, 00, FF, 15, 68, 30, 40, 00, 8B, F0, F7, D6, 33, F7, FF, 15, 64, 30, 40, 00, 33, F0, 8B, 45, F0, 33, 45, EC, 68, 04, 01, 00, 00, 33, F0, 8D, 85, D4, F9, FF, FF, 50, 53, FF, 15, 60, 30, 40, 00, 85, C0, 75, 41, FF, 15, 5C, 30, 40, 00, 83, F8, 78, 75, 1A, 68, A8, 32, 40, 00, E8, 43, FB, FF, FF...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 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=12806644&publisher_id=280&source_id=0&page_id=0&country_code=US&locale=US&browser_id=4&download_id=38419932&external_id=0&session_id=76839864&hardware_id=89646508&installer_file_name=download

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