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optin.php

The file optin.php has been detected as a potentially unwanted program 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, however the file is not signed with an authenticode signature from a trusted source.
MD5:
abba63b8c1e774fb721f726ed05f1f83

SHA-1:
d5ac54042e6d646592d500a64af8a0f7908eef9a

SHA-256:
1554dc5f1adf2e0fd5a92eefc91786e50a820fa8a2fe7fab20e19f4b5dda0857

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
12/25/2024 5:39:15 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Downloader (M)
17.2.2.17

File size:
748.5 KB (766,491 bytes)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\microsoft\windows\inetcache\ie\{random}\optin.php

File PE Metadata
Compilation timestamp:
2/21/2009 2:46:34 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

Entry address:
0x323C

Entry point:
81, EC, 80, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 18, C7, 44, 24, 10, 30, 91, 40, 00, 33, F6, C6, 44, 24, 14, 20, FF, 15, 30, 70, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 70, 40, 00, 53, FF, 15, 7C, 72, 40, 00, 6A, 08, A3, 58, 3F, 42, 00, E8, 05, 2C, 00, 00, A3, A4, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 58, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, B8, 91, 40, 00, 68, A0, 36, 42, 00, E8, BC, 28, 00, 00, FF, 15, B0, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, AA, 28, 00, 00...
 
[+]

Entropy:
7.9767

Packer / compiler:
Nullsoft install system v2.x

Code size:
23 KB (23,552 bytes)

The executing file has been seen to make the following network communications in live environments.

TCP (HTTP):
Connects to ec2-50-17-229-223.compute-1.amazonaws.com  (50.17.229.223:80)

TCP (HTTP):
Connects to ec2-23-21-236-165.compute-1.amazonaws.com  (23.21.236.165:80)

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