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okiitan.exe

Okiitan

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application okiitan.exe by Okiitan 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.
Publisher:
Okiitan  (signed and verified)

MD5:
ce9fffa3a62edffa92ed451c08ed42ab

SHA-1:
3827ad542d919925a258a8e0686fd7b32e6dd41b

SHA-256:
1a0fc6cf1d09bf45a6425071a89f193a529e14228444a632748798f2762b1e93

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:
4/24/2024 3:17:30 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.Okiitan.Installer (M)
15.12.28.18

File size:
462.7 KB (473,768 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\roaming\serv\okiitan.exe

Digital Signature
Signed by:
Okiitan

Authority:
VeriSign, Inc.

Valid from:
2/3/2014 7:00:00 PM

Valid to:
2/4/2015 6:59:59 PM

Subject:
CN=Okiitan, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Okiitan, L=Santa Monica, 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:
72D4F4A7BAF3F88B2B0D2403A4F6CFDB

File PE Metadata
Compilation timestamp:
12/5/2009 5:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:4tkbUfSQHrGTt1s15AJP/G/8kXRG3D0Fw/tE8d3mLtpHHHrh7S:4tkw67t6kg85z0F7PLbH1S

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, 6F, 44, 00, E8, F1, 2B, 00, 00, A3, 84, 6E, 44, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, 9C, 42, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 2E, 44, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, F0, 46, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9664

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

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