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mseb6d.tmp.exe

Giant Galaxy

This is the installer/setup program for a Yontoo adware component, a web browser plugin that injects unwanted ads in the browser. The application mseb6d.tmp.exe by Giant Galaxy 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. It is also typically executed from the user's temporary directory. The file has been seen being downloaded from install-cdn.giantgalaxy.net.
Publisher:
Giant Galaxy  (signed and verified)

MD5:
f21362c48288e3b9f52048296df27e2a

SHA-1:
bb30d4b41c97ff12dea9f210e174fde41c984339

SHA-256:
cdc7de2c086cfadd79c0b4cf21d5e7c3d60e6e9572c0b63e98af34bc49b5ed5e

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:
12/27/2024 8:35:23 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Yontoo.GiantGalaxy.Installer (M)
16.1.31.18

File size:
454.3 KB (465,240 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\temp\mseb6d.tmp.exe

Digital Signature
Signed by:
Giant Galaxy

Authority:
VeriSign, Inc.

Valid from:
6/4/2015 2:00:00 AM

Valid to:
6/4/2016 1:59:59 AM

Subject:
CN=Giant Galaxy, O=Giant Galaxy, 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:
388FFB7BD7D5CC69F5C7C4DE22E78997

File PE Metadata
Compilation timestamp:
12/5/2009 11:52:01 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
12288:lo3P54SAV71s15Ap/G/8g3D0Fw/tN8dkmLtpHHHrh7w:lo/54PV76j8gz0FmcLbH1w

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...
 
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Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

The file mseb6d.tmp.exe has been seen being distributed by the following URL.

http://install-cdn.giantgalaxy.net/sd?is=bt

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