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skype.exe

Skype

Download Manager

This is part of the Air Installer, a download manager which bundles applications with offers for additional 3rd party software, mostly unwanted adware, and may be installed with minimal consent. The application skype.exe, “Skype ” by Download Manager has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. The program is a setup application that uses the AirInstaller Download Manager installer. The file has been seen being downloaded from software.trustydownloads.com.
Publisher:
Download Manager   (signed by Download Manager)

Product:
Skype

Description:
Skype

Version:
2.0.4.99

MD5:
81007f311f21af514595e693b8f3dcc1

SHA-1:
0a7ed493e5a18fd1d56187d341aaa353a2ff016a

SHA-256:
13b66b4ad48fb47d9d5320345e33aa1ef04850ac8a65a4227db2087161b12b79

Scanner detections:
1 / 68

Status:
Adware

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Description:
This is an installer which may bundle legitimate applications with offers for additional 3rd-party applications that may be unwanted by the user. While the installer contains an 'opt-out' feature this is not set be defult and is usually overlooked.

Analysis date:
11/2/2024 1:26:57 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Air Software.Download.Bundler (M)
16.6.13.10

File size:
841.9 KB (862,120 bytes)

Product version:
2.0.4.99

Copyright:
(c) Download Manager

Original file name:
setup.exe

File type:
Executable application (Win32 EXE)

Bundler/Installer:
AirInstaller Download Manager

Language:
English (United States)

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

Digital Signature
Signed by:
Download Manager

Authority:
VeriSign, Inc.

Valid from:
6/7/2013 8:00:00 PM

Valid to:
6/8/2014 7:59:59 PM

Subject:
CN=Download Manager, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Download Manager, L=Vancouver, S=British Columbia, C=CA

Issuer:
CN=VeriSign Class 3 Code Signing 2010 CA, OU=Terms of use at https://www.verisign.com/rpa (c)10, OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US

Serial number:
428E8B7C1AC548D083F4D3A0C5FDAF4C

File PE Metadata
Compilation timestamp:
2/26/2014 12:32:55 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
12288:8dSm0SPFmhs4+doHz2hM3OBT922ymyqlA9ZfZI7m2/g5xkdGOcJzb:8djdd/qH5G5nS9Zfi7m2F8Ogb

Entry address:
0x268310

Entry point:
60, BE, 00, 50, 5A, 00, 8D, BE, 00, C0, E5, FF, 57, 83, CD, FF, EB, 10, 90, 90, 90, 90, 90, 90, 8A, 06, 46, 88, 07, 47, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 72, ED, B8, 01, 00, 00, 00, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C0, 01, DB, 73, 0B, 75, 28, 8B, 1E, 83, EE, FC, 11, DB, 72, 1F, 48, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C0, EB, D4, 01, DB, 75, 07, 8B, 1E, 83, EE, FC, 11, DB, 11, C9, EB, 52, 31, C9, 83, E8, 03, 72, 11, C1, E0, 08, 8A, 06, 46, 83, F0, FF, 74, 75, D1, F8, 89...
 
[+]

Entropy:
7.8869

Packer / compiler:
UPX 2.90LZMA

Code size:
784 KB (802,816 bytes)

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

http://software.trustydownloads.com/.../skype.exe

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