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skypesetup.exe

The application skypesetup.exe has been detected as a potentially unwanted program by 16 anti-malware scanners. The program is a setup application that uses the Inno Setup installer, however the file is not signed with an authenticode signature from a trusted source. The setup program uses the InstallCore engine which may bundle additional software offers including toolbars and browser extensions.
MD5:
18eb866bba5d95dcaa538ecdde96822e

SHA-1:
6809e17120bff2058facc934826048c4d2824d25

SHA-256:
a07fc206bc979034879867d2512fb6dad634ead38257f864758093f3a505549a

Scanner detections:
16 / 68

Status:
Potentially unwanted

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

Analysis date:
4/18/2024 10:05:59 PM UTC  (today)

Scan engine
Detection
Engine version

Agnitum Outpost
PUA.InstallCore
7.1.1

Avira AntiVirus
PUA/InstallCore.Gen7
8.3.1.6

avast!
Win32:OutBrowse-CH [PUP]
150602-1

AVG
OutBrowse
2016.0.3077

Comodo Security
Application.Win32.InstallCore.KAU
22460

Dr.Web
Adware.InstallCore.133
9.0.1.05190

ESET NOD32
Win32/InstallCore.EL potentially unwanted application
7.0.302.0

F-Prot
W32/A-dbe1ec51
v6.4.7.1.166

K7 AntiVirus
Unwanted-Program
13.205.16247

Malwarebytes
PUP.Optional.InstallCore.A
v2015.06.15.02

NANO AntiVirus
Riskware.Win32.InstallCore.dfgloi
0.30.24.2086

Rising Antivirus
PE:Malware.XPACK-LNR/Heur!1.5594
23.00.65.15613

Sophos
PUA 'Install Core'
5.15

Total Defense
Win32/InstallCore.A!generic
37.1.62.1

Vba32 AntiVirus
Downware.InstallCore
3.12.26.4

VIPRE Antivirus
Threat.4786018
40830

File size:
664.4 KB (680,344 bytes)

File type:
Executable application (Win32 EXE)

Installer:
Inno Setup

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

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

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:zcMJfsGs1NfV5B9i1ti1d4kUis9gnT9lAUmBHXZmXjw7E1+3Ed91u:oMJfsn1Nfd9ubBP+4URXj84Gozu

Entry address:
0x98CC

Entry point:
55, 8B, EC, 83, C4, CC, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, FA, 97, FF, FF, E8, 01, AA, FF, FF, E8, 2C, CC, FF, FF, E8, 73, CC, FF, FF, E8, 0A, F3, FF, FF, E8, 71, F4, FF, FF, 33, C0, 55, 68, 76, 9F, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 2C, 9F, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, B0, 40, 00, E8, 9B, FE, FF, FF, E8, 26, FA, FF, FF, 8D, 55, F0, 33, C0, E8, E0, D0, FF, FF, 8B, 55, F0, B8, D8, BD, 40, 00, E8, AB, 98, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, D8, BD, 40, 00, B2, 01, B8...
 
[+]

Entropy:
7.8240

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

Code size:
36 KB (36,864 bytes)

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

TCP (HTTP):
Connects to server-54-230-52-96.jfk6.r.cloudfront.net  (54.230.52.96:80)

TCP (HTTP):
Connects to server-54-192-54-183.jfk6.r.cloudfront.net  (54.192.54.183:80)

TCP (HTTP):
Connects to ec2-54-243-153-163.compute-1.amazonaws.com  (54.243.153.163:80)

TCP (HTTP):
Connects to ec2-52-10-224-155.us-west-2.compute.amazonaws.com  (52.10.224.155:80)

TCP (HTTP):
Connects to a23-15-9-144.deploy.static.akamaitechnologies.com  (23.15.9.144:80)

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