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cvac2.exe

Blabbers Communications Ltd

This is the Blabbers installer, a PUP (potentially unwanted program) that will modify the web browser's search behavior as well as may hijack the browser's home page and other providers. The application cvac2.exe by Blabbers Communications has been detected as adware by 2 anti-malware scanners. The program is a setup application that uses the NSIS (Nullsoft Scriptable Install System) installer. It is also typically executed from the user's temporary directory. The file has been seen being downloaded from media.instcdn.com and multiple other hosts.
Publisher:
Blabbers Communications Ltd  (signed and verified)

Version:
2

MD5:
aa638e3128d8c55b62f698d221673e1f

SHA-1:
cc6ba6280a8ab14938020b5088a4f68c4af24907

SHA-256:
03b78cdca96148cc61640f0daff2547825d359f01a22d69e9c83d7f1acb36b70

Scanner detections:
2 / 68

Status:
Adware

Analysis date:
2/25/2025 2:25:32 AM UTC  (today)

Scan engine
Detection
Engine version

Comodo Security
Heur.Suspicious
13446

Reason Heuristics
PUP.BlabbersCommunications.F
14.8.7.17

File size:
1 MB (1,078,464 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\temp\cvac2.exe

Digital Signature
Signed by:
Blabbers Communications Ltd

Authority:
The USERTRUST Network

Valid from:
2/10/2011 1:00:00 AM

Valid to:
2/11/2012 12:59:59 AM

Subject:
CN=Blabbers Communications Ltd, O=Blabbers Communications Ltd, STREET=Arad 3, L=Tel Aviv, S=Israel, PostalCode=43034, C=IL

Issuer:
CN=UTN-USERFirst-Object, OU=http://www.usertrust.com, O=The USERTRUST Network, L=Salt Lake City, S=UT, C=US

Serial number:
00D561643A7697D633BCB565E2E1EF7365

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):
24576:eJObT5po6u3jmLwW/k26x6vw6XqwGvT9h7N42HpZ1iPTaPZ:fAis76XqNRh7NRHD1iPePZ

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 cvac2.exe has been seen being distributed by the following 2 URLs.

http://media.instcdn.com/xmlcdn/ecommemule/.../Browser_Helper_Companion.exe

http://media.instcdn.com/xmlcdn/.../Browser_Helper_Companion.exe

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