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updatepacfunction.exe

PacFunction

Part of the Yontoo web browser plugin (delivers advertisements to the web browser in the form of injected banners, text-links, popups, etc.) the updater mechanism for PacFunction will automatically keep the extension patched by downloaded new functionality which is auto-enabled by default. The application updatepacfunction.exe by PacFunction has been detected as adware by 7 anti-malware scanners. It runs as a separate (within the context of its own process) windows Service named “Update PacFunction”. It will plug into the web browser and display context-based advertisements by overwriting existing ads or by inserting new ones on various web pages.
Publisher:
PacFunction  (signed and verified)

Version:
1.0.5417.26233

MD5:
02deafbd624eece87507fc37cbd29f69

SHA-1:
56d403e6f28961359b6852c2063b88ceb46a8dc0

SHA-256:
3fc158e15a48f74fb39fc4c8a08c2504e67e91fb6a309c80d2380e71c8cf88ad

Scanner detections:
7 / 68

Status:
Adware

Explanation:
Part of the Yontoo adware web browser extension update process.

Analysis date:
4/25/2024 10:33:57 AM UTC  (today)

Scan engine
Detection
Engine version

AhnLab V3 Security
PUP/Win32.BrowseFox
2014.11.01

AVG
Pafun
2015.0.3304

Baidu Antivirus
Adware.Win32.BrowseFox
4.0.3.141031

ESET NOD32
MSIL/BrowseFox (variant)
8.10653

Malwarebytes
PUP.Optional.PacFunction.A
v2014.10.31.10

Reason Heuristics
Adware.Yontoo.Service.R
14.10.31.20

VIPRE Antivirus
Yontoo
34416

File size:
511.3 KB (523,552 bytes)

Product version:
1.0.5417.26233

Original file name:
PacFunction.exe

File type:
Executable application (Win32 EXE)

Common path:
C:\Program Files\pacfunction\updatepacfunction.exe

Digital Signature
Signed by:
PacFunction

Authority:
VeriSign, Inc.

Valid from:
1/9/2014 12:00:00 AM

Valid to:
1/9/2015 11:59:59 PM

Subject:
CN=PacFunction, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=PacFunction, 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:
4DF47FADF68D2EB9B8A7923DCCC176FF

File PE Metadata
Compilation timestamp:
10/31/2014 10:34:32 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
6.0

.NET CLR dependent:
Yes

CTPH (ssdeep):
12288:nvUjJyFUuxg9klhblROK2Sf+y+QB8rkxF7E9s:nuJVxWaRq97r

Entry address:
0x7F926

Entry point:
FF, 25, 00, 20, 40, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00, 00...
 
[+]

Developed / compiled with:
Microsoft Visual C# / Basic .NET

Code size:
502.5 KB (514,560 bytes)

Service
Display name:
Update PacFunction

Type:
Win32OwnProcess


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