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ttessab.dll

Ttessab

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The module ttessab.dll by Ttessab 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 an Internet Explorer cache folder. The file has been seen being downloaded from install-cdn.ttessab.net.
Publisher:
Ttessab  (signed and verified)

Product:
Ttessab

Version:
1.0.0.6

MD5:
d63eb866694540241fffe83256f4b411

SHA-1:
593679e7f2c6b64fbac5e78d248164ad0e98626f

SHA-256:
972a11e417f0fe5dd3add20e0953f69f47a43f5d42f979e5c82dac6a9698016a

Scanner detections:
1 / 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:
5/5/2024 3:03:42 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.Ttessab (M)
16.6.1.9

File size:
244.3 KB (250,136 bytes)

Product version:
1.0.0.6

Copyright:
(c) Ttessab. All rights reserved.

File type:
Dynamic link library (Win32 DLL)

Language:
English (United States)

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

Digital Signature
Signed by:
Ttessab

Authority:
VeriSign, Inc.

Valid from:
9/19/2013 2:00:00 AM

Valid to:
9/20/2015 1:59:59 AM

Subject:
CN=Ttessab, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Ttessab, 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:
198AA4CA33AF1FC06C47646A032C938B

File PE Metadata
Compilation timestamp:
1/9/2015 2:55:20 PM

OS version:
6.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
11.0

CTPH (ssdeep):
3072:k1houtou6qz4NmbXRAIieGJrVf9eAxjN+EIaIN3mUk1xf:kltou6a4kLRAReG7INzk1xf

Entry address:
0x12854

Entry point:
55, 8B, EC, 83, 7D, 0C, 01, 75, 05, E8, 41, 8D, 00, 00, FF, 75, 10, FF, 75, 0C, FF, 75, 08, E8, 07, 00, 00, 00, 83, C4, 0C, 5D, C2, 0C, 00, 6A, 0C, 68, 70, 30, 03, 10, E8, BD, 01, 00, 00, 33, C0, 40, 8B, 75, 0C, 85, F6, 75, 0C, 39, 35, C4, 77, 03, 10, 0F, 84, E4, 00, 00, 00, 83, 65, FC, 00, 83, FE, 01, 74, 05, 83, FE, 02, 75, 35, 8B, 0D, FC, A4, 02, 10, 85, C9, 74, 0C, FF, 75, 10, 56, FF, 75, 08, FF, D1, 89, 45, E4, 85, C0, 0F, 84, B1, 00, 00, 00, FF, 75, 10, 56, FF, 75, 08, E8, 11, FE, FF, FF, 89, 45, E4...
 
[+]

Developed / compiled with:
Microsoft Visual C++

Code size:
159 KB (162,816 bytes)

The file ttessab.dll has been seen being distributed by the following URL.

http://install-cdn.ttessab.net/bed?r=2015011012&bet=3

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