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natsumi.rar.exe

Anton Melnikov

This is a WebPick installer that bundles (with very minimal user consent) a number of adware browser extensions which inject ads in the browser. The application natsumi.rar.exe, “Installer for TopApp software” by Anton Melnikov has been detected as adware by 21 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 software  (signed by Anton Melnikov)

Product:
TopApp software

Description:
Installer for TopApp software

Version:
2014.5.23.1127

MD5:
72384e570b44dc89860d3dcdec1ad649

SHA-1:
895037b5ae3efadf232f64150e3e7b306bb22e5a

SHA-256:
6a7ec7f247478605acd45b4c707c5385899f0179b37274ba7f28ad4af7d8bc25

Scanner detections:
21 / 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:
4/24/2024 10:46:53 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
Trojan.AntiFW
7.1.1

Avira AntiVirus
TR/AntiFW.b.109
7.11.153.78

avast!
Win32:InstalleRex-BV [PUP]
140531-1

AVG
Generic
2015.0.3452

Comodo Security
Application.Win32.InstalleRex.KG
18450

Dr.Web
Threat.Undefined
9.0.1.05190

ESET NOD32
Win32/InstalleRex.M potentially unwanted application
7.0.302.0

K7 AntiVirus
Unwanted-Program
13.1712319

Kaspersky
Trojan.Win32.AntiFW
15.0.0.463

Malwarebytes
PUP.Optional.InstalleRex
v2014.06.06.03

McAfee
PUP-FHQ!72384E570B44
5600.7108

NANO AntiVirus
Riskware.Win32.InfoLeak.cvgqot
0.28.0.60100

Panda Antivirus
PUP/TSUploader
14.06.06.03

Qihoo 360 Security
Malware.QVM20.Gen
1.0.0.1015

Quick Heal
Trojan.AntiFW.A5
6.14.14.00

Reason Heuristics
Adware.WebPick.Installer.K
14.6.6.2

Rising Antivirus
PE:Trojan.AntiFW!6.19C8
23.00.65.14604

Sophos
InstallRex
4.98

Vba32 AntiVirus
Downware.TSU
3.12.26.0

VIPRE Antivirus
Threat.4150696
29800

File size:
316.2 KB (323,760 bytes)

Product version:
1.0.0.3

Copyright:
Copyright © 2014 TopApp software

Original file name:
TSULoader.exe

File type:
Executable application (Win32 EXE)

Installer:
WebPick InstalleRex (Tarma)

Language:
Language Neutral

Common path:
C:\users\{user}\Pictures\natsumi.rar.exe

Digital Signature
Signed by:
Anton Melnikov

Authority:
COMODO CA Limited

Valid from:
8/26/2013 5:00:00 PM

Valid to:
8/27/2014 4:59:59 PM

Subject:
CN=Anton Melnikov, O=Anton Melnikov, STREET=Borshagovskaya 117, L=Kiev, S=Kiev, PostalCode=03058, C=UA

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

Serial number:
008EFE75FFE332B06C663189A317121232

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

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
6144:urYbUzkuvcBYC47l2xLnvhueEZdkKQ3+7Oj7hTOVA1HWZBZ:urdkuveY3CvI5Zdkj6OEu1HSX

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...
 
[+]

Entropy:
7.9537

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 bytes)

The file natsumi.rar.exe has been seen being distributed by the following URL.

http://applicationgrabb.net/.../natsumi.rar.exe

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

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

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