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openkeyword_silent.exe

Maroin Co., Ltd

The application openkeyword_silent.exe by Maroin Co. 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. The file has been seen being downloaded from sub.openkeyword.co.kr.
Publisher:
Maroin Co., Ltd  (signed and verified)

MD5:
91eb4c40709eeff9cd808ed68cdbaab1

SHA-1:
3f14cc2f6b67286fb9fc640554a5af734ca1d846

SHA-256:
b4b6371ab4016dc611a3cef20ec649799de1b75da102ee587504b42c962f8023

Scanner detections:
1 / 68

Status:
Adware

Note:
Our current pool of anti-malware engines have not currently detected this file, however based on our own detection heuristics we feel that this file is unwanted.

Analysis date:
5/6/2024 7:37:48 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.MaroinCo.Installer (M)
16.5.23.10

File size:
2.6 MB (2,740,656 bytes)

File type:
Executable application (Win32 EXE)

Installer:
NSIS (Nullsoft Scriptable Install System)

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

Digital Signature
Signed by:
Maroin Co., Ltd

Authority:
thawte, Inc.

Valid from:
11/30/2015 4:00:00 PM

Valid to:
3/1/2018 3:59:59 PM

Subject:
CN="Maroin Co., Ltd", O="Maroin Co., Ltd", L=Suyeong-gu, S=Busan, C=KR

Issuer:
CN=thawte SHA256 Code Signing CA, O="thawte, Inc.", C=US

Serial number:
6247B0D6AE6DA842E9AFD19046D234EF

File PE Metadata
Compilation timestamp:
12/5/2009 2:50:41 PM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
6.0

CTPH (ssdeep):
49152:m3ZbxBNXiO+3mq2SKcw6B2y28rn8r6B4Fwh9bwe+ZWA6cfo:CZbxTD+2Cm6oJ8YGh9bV+ZWAzo

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, 3F, 42, 00, E8, F1, 2B, 00, 00, A3, 84, 3E, 42, 00, 53, 8D, 44, 24, 34, 68, 60, 01, 00, 00, 50, 53, 68, 30, F4, 41, 00, FF, 15, 58, 71, 40, 00, 68, 54, 91, 40, 00, 68, 80, 36, 42, 00, E8, A4, 28, 00, 00, FF, 15, AC, 70, 40, 00, BF, 00, 90, 42, 00, 50, 57, E8, 92, 28, 00, 00...
 
[+]

Entropy:
7.9981

Packer / compiler:
Nullsoft install system v2.x

Code size:
22.5 KB (23,040 bytes)

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

http://sub.openkeyword.co.kr/opapp/bogo1/app/.../openkeyword_silent.exe

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