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vstub.exe

Wajamu

The file is part of Wajam, a web browser extension that injects social search integration into various search portals such as Google. The application vstub.exe by Wajamu has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat. It is also typically executed from the user's temporary directory.
Publisher:
Wajamu  (signed and verified)

MD5:
563d1c643b85e956a1baae91c85c9e03

SHA-1:
d20d63dfc1b8ea2c30f126f2cf4a2f6e1b78febf

SHA-256:
d55021dfc1c64beedf25398ee49047ef900a5b4b93883b91972f5d58888ed2d6

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:
12/24/2024 5:31:53 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Wajam (M)
16.7.15.4

File size:
259.4 KB (265,576 bytes)

File type:
Executable application (Win32 EXE)

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

Digital Signature
Signed by:
Wajamu

Authority:
Thawte, Inc.

Valid from:
8/25/2013 9:00:00 PM

Valid to:
8/26/2014 8:59:59 PM

Subject:
CN=Wajamu, O=Wajamu, L=Herzlia, S=Israel, C=IL

Issuer:
CN=Thawte Code Signing CA - G2, O="Thawte, Inc.", C=US

Serial number:
254859747F512412BB92CB81D0C020A7

File PE Metadata
Compilation timestamp:
4/8/2014 5:52:38 AM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:xEzppZb1FY2Eir3Mj2DoIB+f622ZAqqqqWtW3w0pUPZ60msnru+vikMPLdKfo0dk:xEVpWZibwWvBfDtW3wKkRdk

Entry address:
0x8EF3

Entry point:
E8, A4, 94, 00, 00, E9, 00, 00, 00, 00, 6A, 14, 68, 50, 57, 42, 00, E8, 97, 52, 00, 00, E8, 30, 29, 00, 00, 0F, B7, F0, 6A, 02, E8, 37, 94, 00, 00, 59, B8, 4D, 5A, 00, 00, 66, 39, 05, 00, 00, 40, 00, 74, 04, 33, DB, EB, 33, A1, 3C, 00, 40, 00, 81, B8, 00, 00, 40, 00, 50, 45, 00, 00, 75, EB, B9, 0B, 01, 00, 00, 66, 39, 88, 18, 00, 40, 00, 75, DD, 33, DB, 83, B8, 74, 00, 40, 00, 0E, 76, 09, 39, 98, E8, 00, 40, 00, 0F, 95, C3, 89, 5D, E4, E8, 38, 50, 00, 00, 85, C0, 75, 08, 6A, 1C, E8, DC, 00, 00, 00, 59, E8...
 
[+]

Code size:
114 KB (116,736 bytes)

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