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lesstabs-setup.exe

LessTabs

The application lesstabs-setup.exe by LessTabs has been detected as adware by 6 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It is also typically executed from the user's temporary directory. The file has been seen being downloaded from s3.amazonaws.com and multiple other hosts.
Publisher:
LessTabs  (signed and verified)

Product:
LessTabs

Description:
LessTabs Setup

Version:
1.7.0.0

MD5:
6e30d2fc729f33cc215ed379912a06fc

SHA-1:
be12fb153e72b02fe0b0e4cd330607b4361ca7ba

SHA-256:
7b59ea6f01656064032d9d2b0babd81ae867b5db84c8b8c244fc4f5924a43c05

Scanner detections:
6 / 68

Status:
Adware

Analysis date:
12/24/2024 11:55:13 AM UTC  (today)

Scan engine
Detection
Engine version

Dr.Web
Adware.Plugin.71
9.0.1.060

ESET NOD32
Win32/AdWare.Vitruvian (variant)
8.9341

K7 AntiVirus
Unwanted-Program
13.175.10963

Reason Heuristics
PUP.Installer.LessTabs.O
14.3.1.23

Sophos
LessTabs IE Client
4.97

VIPRE Antivirus
Adware.LessTabs
25852

File size:
1.2 MB (1,220,584 bytes)

Product version:
1.7.0.0

Copyright:
©2013 LessTabs

Original file name:
lesstabs-setup.exe

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Language:
Language Neutral

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\windows-live-messenger-2013_185\software\lesstabs-setup.exe

Digital Signature
Signed by:
LessTabs

Authority:
Starfield Technologies, Inc.

Valid from:
2/15/2013 6:00:20 AM

Valid to:
2/15/2014 2:06:10 AM

Subject:
CN=LessTabs, O=LessTabs, L=La Jolla, S=CA, C=US

Issuer:
SERIALNUMBER=10688435, CN=Starfield Secure Certification Authority, OU=http://certificates.starfieldtech.com/repository, O="Starfield Technologies, Inc.", L=Scottsdale, S=Arizona, C=US

Serial number:
27795724B41A36

File PE Metadata
Compilation timestamp:
12/6/2009 2:50:46 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
24576:hD/+Mk2wWuPmsflb+PBhn//0Wc+9DEjjwjuELye4MyoH:xnw9+WlqZ//0mwjMjuCyqzH

Entry address:
0x323C

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 30, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 58, 3F, 42, 00, E8, 09, 2C, 00, 00, A3, A4, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 58, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, B8, 91, 40, 00, 68, A0, 36, 42, 00, E8, BC, 28, 00, 00, FF, 15, B0, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, AA, 28, 00, 00...
 
[+]

Entropy:
7.9841

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The file lesstabs-setup.exe has been seen being distributed by the following 2 URLs.

http://s3.amazonaws.com/DirectClients/.../lesstabs-setup.exe

http://cdn.airdlr9.com/downloads/offers/.../lesstabs-setup.exe

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