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skype_en.exe

Symbolicom Holdings Ltd

The installer utilizes the installCore download manager which may bundle additional offers for various ad-supported toolbars, extensions and utilities. The application skype_en.exe by Symbolicom Holdings has been detected as adware by 10 anti-malware scanners. The program is a setup application that uses the installCore installer. The setup program uses the InstallCore engine which may bundle additional software offers including toolbars and browser extensions. The file has been seen being downloaded from api.downloadastro.com.
Publisher:
Symbolicom Holdings Ltd  (signed and verified)

MD5:
16f2706d1c3880f32e460bc2d236e557

SHA-1:
125e8794037aca0c36e520fe5ee1276ad9301c34

SHA-256:
af44225bc20fc3921d39fe4044028a00325492162fc018c07c6ce98a70822e0f

Scanner detections:
10 / 68

Status:
Adware

Explanation:
Uses the InstallCore download manager to install additional potentially unwanted software which may include extensions such as DealPly and various toolbars.

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 5:07:50 PM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
ADWARE/InstallCore.Gen7
7.11.134.32

AVG
MalSign.Generic
2015.0.3549

Dr.Web
Trojan.MulDrop5.10078
9.0.1.060

ESET NOD32
Win32/InstallCore.JE.gen (variant)
8.9487

Malwarebytes
PUP.Optional.Installcore
v2014.03.01.12

Qihoo 360 Security
Win32/Virus.Adware.94c
1.0.0.1015

Reason Heuristics
PUP.SymbolicomHoldings.I
14.2.24.10

Rising Antivirus
PE:Malware.XPACK-LNR/Heur!1.5594
23.00.65.14227

Vba32 AntiVirus
Downware.InstallCore
3.12.24.3

VIPRE Antivirus
InstallCore.b
26956

File size:
697.9 KB (714,624 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
installCore (using Inno Setup)

Language:
Language Neutral

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

Digital Signature
Signed by:
Symbolicom Holdings Ltd

Authority:
COMODO CA Limited

Valid from:
1/7/2014 4:00:00 PM

Valid to:
1/8/2015 3:59:59 PM

Subject:
CN=Symbolicom Holdings Ltd, OU=Symbolicom, O=Symbolicom Holdings Ltd, STREET=Trident Cyprus, STREET=115 Griva Digeni Avenue Trident Centre, STREET=Limassol, L=Limassol, S=Cyprus, PostalCode=3101, C=CY

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

Serial number:
00C4B90F930A0BA04B111E671526916207

File PE Metadata
Compilation timestamp:
6/19/1992 3:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:Zvpghu68Okv8a8I2E7DFouu9TSfPoGYdF0nqk203TkyEe2bOFbWRMUJDMy1TXzHC:ZvmhuBYjgDjaYGfQH203d/+f2UDTXz

Entry address:
0x9C40

Entry point:
55, 8B, EC, 83, C4, C4, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, 86, 94, FF, FF, E8, 8D, A6, FF, FF, E8, 1C, A9, FF, FF, E8, 53, C9, FF, FF, E8, 9A, C9, FF, FF, E8, C9, F2, FF, FF, E8, 30, F4, FF, FF, 33, C0, 55, 68, FC, A2, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, C5, A2, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, C0, 40, 00, E8, 96, FE, FF, FF, E8, C9, FA, FF, FF, 8D, 55, F0, 33, C0, E8, 83, CF, FF, FF, 8B, 55, F0, B8, 24, CE, 40, 00, E8, 32, 95, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, 24, CE...
 
[+]

Entropy:
7.8320

Packer / compiler:
Inno Setup v5.x - Installer Maker

Code size:
37 KB (37,888 bytes)

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

http://api.downloadastro.com/api/downloader/.../en?callback=jsonpCallbackDownload&_=1393255538

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