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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 1 anti-malware scanner with very strong indications that the file is a potential threat. 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.
Publisher:
Blabbers Communications Ltd  (signed and verified)

Version:
2

MD5:
c957b572112e4598e4f391ea0a17854e

SHA-1:
d02994e9f239104ddb854a8d3fbe6973609e53e4

SHA-256:
e15d1e911086204d997cfe725442f220c4acef4e5894453da70e71967c209a73

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.

Analysis date:
4/19/2024 4:13:30 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Blabbers.BlabbersCommunications.Installer (M)
16.1.8.1

File size:
1 MB (1,078,456 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:Z0ObT5po6u3jmLwW/k26x6vwO5hXG/T9u7N4a5hyZ1iPsP1:nAis7O5kBu7N95s1iPsP1

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 URL.

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

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