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skypesetup.exe

TiKi TaKa

This is the OutBrowse Revenyou installer which bundles offers for additional third party applications that may be unwanted and installed without consent. The application skypesetup.exe by TiKi TaKa 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 OutBrowse Revenyou installer. The file has been seen being downloaded from get.file8desktop.com.
Publisher:
TiKi TaKa  (signed and verified)

MD5:
1a2aaaaa5574b9a4cbb9339b38d1b9a0

SHA-1:
2946ded0a99075e1f098c4d6c887d13213dd2347

SHA-256:
fc41e30d82e78e0320a46bf1b76485329df0654a4ba3287b8465a3d100168752

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:
4/17/2025 6:09:59 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Outbrowse.TiKiTaKa.Bundler (M)
16.4.6.0

File size:
572.4 KB (586,152 bytes)

File type:
Executable application (Win32 EXE)

Bundler/Installer:
OutBrowse Revenyou (using Nullsoft Install System)

Language:
Language Neutral

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

Digital Signature
Signed by:
TiKi TaKa

Authority:
thawte, Inc.

Valid from:
1/16/2015 6:00:00 PM

Valid to:
12/17/2015 5:59:59 PM

Subject:
CN=TiKi TaKa, O=TiKi TaKa, L=Dublin, S=Dublin, C=IE

Issuer:
CN=thawte SHA256 Code Signing CA, O="thawte, Inc.", C=US

Serial number:
3487E38E20A9221880B21663DD3A995D

File PE Metadata
Compilation timestamp:
12/5/2009 4:50:52 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:3AmHMQjzWX31DeCT+gTrbgwmsNn5H2XulIfOBLRNMKlHDi1hEkDjl:3bsQjSnICNTrhmsN5H2UxLRNM64Dvl

Entry address:
0x30FA

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 60, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B0, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 18, EC, 42, 00, E8, F1, 2B, 00, 00, A3, 64, EB, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 98, 8F, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 60, E3, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 40, 43, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9702

Packer / compiler:
Nullsoft install system v2.x

Code size:
23.5 KB (24,064 bytes)

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

http://get.file8desktop.com/DownloadManager/Get?p=18044&d=24018&l=23220&n=1&productname=Download Manager&exeurl=http://download.skype.com/f91abd10a88c144359e4c598ef9928ca/partner/.../SkypeSetup.exe&dynamicname=Skype&S=os[Windows 8.1]__browser[Chrome]&d2=284729&filename=SkypeSetup

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