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linkswift.exe

linkswift

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application linkswift.exe by linkswift has been detected as adware by 11 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages. It is also typically executed from an Internet Explorer cache folder. The file has been seen being downloaded from cdn.cmatecdnfast.us and multiple other hosts.
Publisher:
linkswift  (signed and verified)

MD5:
a1583746f849a2e4c70b59aacc723e9f

SHA-1:
c6e90b7bb1ae1c9a775b1cb1a417d5fb476fe4f4

SHA-256:
d38044b8320c7faeb9adddd3766ff713e378b6b7c1f35a536e7fd480d60a09b9

Scanner detections:
11 / 68

Status:
Adware

Explanation:
Injects advertising in the web browser in various formats.

Analysis date:
4/29/2024 8:53:08 AM UTC  (today)

Scan engine
Detection
Engine version

Dr.Web
Adware.Plugin.100
9.0.1.0360

ESET NOD32
Win32/BrowseFox
8.9294

K7 AntiVirus
Trojan
13.175.10852

Kaspersky
not-a-virus:AdWare.Win32.LinkSwift
14.0.0.4443

Malwarebytes
PUP.Optional.LinkSwift.A
v2014.01.19.08

Reason Heuristics
PUP.linkswift.J
14.8.7.22

Rising Antivirus
PE:Trojan.Win32.Generic.15BDEDBE!364768702
23.00.65.131224

SUPERAntiSpyware
Trojan.Agent/Gen-BHO
10884

Trend Micro House Call
TROJ_GEN.F47V0815
7.2.360

Vba32 AntiVirus
AdWare.LinkSwift
3.12.24.3

VIPRE Antivirus
Yontoo
25450

File size:
171.3 KB (175,376 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\temporary internet files\content.ie5\{random}\linkswift.exe

Digital Signature
Signed by:
linkswift

Authority:
VeriSign, Inc.

Valid from:
8/12/2013 2:00:00 AM

Valid to:
8/13/2015 1:59:59 AM

Subject:
CN=linkswift, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=linkswift, L=San Diego, S=California, C=US

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:
3AD03D814D9E16358271D2CA8A94AB42

File PE Metadata
Compilation timestamp:
12/5/2009 11:50:41 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
3072:oLk395hYXJsCvM/VpUhRJnTttaSr19anH7l1m/GqMHJGULvX:oQqDvMH0R1BtaS5YnH7nm/G/Hcy

Entry address:
0x30CB

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, 38, 3F, 42, 00, E8, F1, 2B, 00, 00, A3, 84, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 36, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

The file linkswift.exe has been seen being distributed by the following 3 URLs.

http://cdn.cmatecdnfast.us/.../LinkSwift.exe

http://secure.fastdlcache.com/.../LinkSwift.exe

http://cdn.growmatecdn.us/.../LinkSwift.exe

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