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googlechromeextensionupdate_m3.exe

Google Chrome Extension Updater

Alactro LLC

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application googlechromeextensionupdate_m3.exe by Alactro has been detected as adware by 10 anti-malware scanners. This is a self-extracting archive and installer and has been known to bundle potentially unwanted software. The file has been seen being downloaded from dl.smstmv.com and multiple other hosts.
Publisher:
Alactro LLC  (signed and verified)

Product:
Google Chrome Extension Updater

Description:
Installer

Version:
2013.1.31.2240

MD5:
a1cf4aa4c2ade2ce7d83f92eb7d152c2

SHA-1:
d0cabad570cac11cbb32f46f316546baac72759e

SHA-256:
b277968495f9d54abdfd43044e1ec1b1b7d5f3310a73b6340b992c65f28ae8bc

Scanner detections:
10 / 68

Status:
Adware

Explanation:
Belongs to the Sambreel/Yontoo progam that inserts various forms of advertising in the user's web browser, installed with minimal or no user consent.

Analysis date:
11/30/2024 10:11:17 AM UTC  (today)

Scan engine
Detection
Engine version

Avira AntiVirus
ADWARE/Yontoo.Gen2
7.11.108.234

AVG
AdInject.Alactro
2015.0.3524

Comodo Security
UnclassifiedMalware
17140

Dr.Web
Adware.Plugin.11
9.0.1.084

ESET NOD32
Win32/Adware.Yontoo (variant)
8.8948

IKARUS anti.virus
AdWare.Yontoo
t3scan.2.0.127

MicroWorld eScan
ADWARE/Yontoo.Gen2
15.0.0.252

Reason Heuristics
PUP.Installer.Alactro.EE
14.8.8.0

Rising Antivirus
Trojan.InstallRex!562A
23.00.65.14323

VIPRE Antivirus
Yontoo
22616

File size:
591.6 KB (605,840 bytes)

Product version:
1.12.02

Copyright:
Copyright (c) 2013 Alactro LLC. All rights reserved.

File type:
Executable application (Win32 EXE)

Language:
Language Neutral

Common path:
C:\users\{user}\downloads\googlechromeextensionupdate_m3.exe

Digital Signature
Signed by:
Alactro LLC

Authority:
GoDaddy.com, Inc.

Valid from:
5/15/2012 10:01:43 PM

Valid to:
5/26/2013 11:13:23 PM

Subject:
CN=Alactro LLC, O=Alactro LLC, L=Carlsbad, S=CA, C=US

Issuer:
SERIALNUMBER=07969287, CN=Go Daddy Secure Certification Authority, OU=http://certificates.godaddy.com/repository, O="GoDaddy.com, Inc.", L=Scottsdale, S=Arizona, C=US

Serial number:
046CAA7E02C7FB

File PE Metadata
Compilation timestamp:
8/9/2011 12:55:34 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
12288:S0GOsDZc70sG9VUwd8mX84HsDAzHH9HCdClRWUWW1xaUsNOpTZExqj/32g:3YU0NA2bMDA7HOClxWzl6oqj/32g

Entry address:
0x1627

Entry point:
55, 8B, EC, 81, EC, 58, 0B, 00, 00, 53, 56, 33, DB, 57, 66, 89, 9D, A8, F4, FF, FF, 89, 5D, FC, FF, 15, 74, 30, 40, 00, A3, 00, 40, 40, 00, FF, 15, 70, 30, 40, 00, 89, 45, F8, 8D, 85, B8, FC, FF, FF, 50, C7, 85, B8, FC, FF, FF, 14, 01, 00, 00, FF, 15, 6C, 30, 40, 00, 85, C0, 75, 21, FF, 15, 14, 30, 40, 00, 50, 68, 30, 34, 40, 00, E8, 40, FA, FF, FF, 59, C7, 05, 04, 40, 40, 00, FF, 00, 00, 00, E9, C5, 01, 00, 00, 68, 1C, 34, 40, 00, 68, 0C, 34, 40, 00, FF, 15, 68, 30, 40, 00, 50, FF, 15, 64, 30, 40, 00, 3B...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
7.5 KB (7,680 bytes)

The file googlechromeextensionupdate_m3.exe has been seen being distributed by the following 3 URLs.

http://dl.smstmv.com/Update/.../?mirror=3

http://dl.mscimg.com/Update/.../?mirror=3

http://dl.dsmstc.com/Update/.../?mirror=3

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