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PacFunction.exe

PacFunction

Part of the Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The file PacFunction.exe by PacFunction has been detected as adware by 1 anti-malware scanner with very strong indications that the file is a potential threat.
Publisher:
PacFunction  (signed and verified)

Version:
1.0.5389.40158

MD5:
c333f564ab1806d8f024563cf1f75cb3

SHA-1:
d8bd3975c80a2921e315a05377431cc01bfe590e

SHA-256:
b948e3efd7f9266c7d3fcc7c37e7fc62666617aabb071a632d3e9421b79c5d35

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:
4/25/2024 7:02:17 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.PacFunction (M)
16.2.10.5

File size:
510.3 KB (522,528 bytes)

Product version:
1.0.5389.40158

Original file name:
PacFunction.exe

Common path:
C:\Program Files\pacfunction\bin\tmp88b2.tmp

Digital Signature
Signed by:
PacFunction

Authority:
VeriSign, Inc.

Valid from:
1/9/2014 5:00:00 AM

Valid to:
1/10/2015 4:59:59 AM

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:
10/4/2014 11:18:40 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
6.0

.NET CLR dependent:
Yes

CTPH (ssdeep):
6144:efuq6VKig884nE8gvkPfk2h1Ucol6/DxYxsQ6ZolCE13MGgubFbMOA9n/HuIQ/Qs:efq85dRktUcolOUMeN69fJSxYq

Entry address:
0x7F45A

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, 02, 00, 00, 00, 5E, 00, 00, 00, 9C, F4, 07, 00, 9C, D6, 07, 00, 52, 53, 44, 53, CD, 68, 0A, CC, CE, E9, DD, 4D, 85, AB, 92, 7B, 1F, 2C, 7D, 44, 01, 00, 00, 00, 44, 3A, 5C, 55, 74, 69, 6C, 69, 74, 69, 65, 73, 5C, 78, 72, 7A, 79, 74, 67, 62, 34, 2E, 69, 67, 61, 5C, 44, 65, 73, 6B, 74, 6F, 70, 5C, 44, 65, 73, 6B...
 
[+]

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

Code size:
501.5 KB (513,536 bytes)

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