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oldoserc.exe

yssoft

The application oldoserc.exe, “LuckyTool Application” by yssoft has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat. It runs as a windows Service named “oldoserv”. The file has been seen being downloaded from down.luckytool.net.
Publisher:
luckytool  (signed by yssoft)

Product:
luckytool

Description:
LuckyTool Application

Version:
1.0.0.1

MD5:
f2ce10187409e1d32c880f942377a0ac

SHA-1:
c3ba16e4690a6ad3808eae2825f40b018aa8a185

SHA-256:
f0c4f1ad3c0b7c658fefc3b7584942eac15252561fe7b6ef7678b44cd6290d0a

Scanner detections:
1 / 68

Status:
Potentially unwanted

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:
12/28/2024 4:07:09 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.yssoft (M)
16.4.24.3

File size:
299.2 KB (306,360 bytes)

Product version:
1.0.0.1

Copyright:
Copyright (C) 2014 luckytool

Original file name:
luckytool

File type:
Executable application (Win32 EXE)

Common path:
C:\users\{user}\appdata\roaming\oldoser\oldoserc.exe

Digital Signature
Signed by:
yssoft

Authority:
thawte, Inc.

Valid from:
3/24/2016 9:00:00 AM

Valid to:
5/24/2018 8:59:59 AM

Subject:
CN=yssoft, O=yssoft, L=Chilgok-gun, S=Gyeongsangbuk-do, C=KR

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

Serial number:
4FFD8833DCF52D25418DA64CD58D741A

File PE Metadata
Compilation timestamp:
9/22/2015 9:49:04 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows Console

Linker version:
14.0

CTPH (ssdeep):
3072:/3/GAFNX34H2eWHnO9GDoiEy6qSBfLpt5ZigMRdClZS4BMT:v/GAXoHgHO9koiEyMxIdCvTBA

Entry address:
0x83C3

Entry point:
E8, 09, 04, 00, 00, E9, 7A, FE, FF, FF, CC, CC, CC, 51, 8D, 4C, 24, 08, 2B, C8, 83, E1, 0F, 03, C1, 1B, C9, 0B, C1, 59, E9, 5A, 05, 00, 00, 51, 8D, 4C, 24, 08, 2B, C8, 83, E1, 07, 03, C1, 1B, C9, 0B, C1, 59, E9, 44, 05, 00, 00, 55, 8B, EC, 83, 25, FC, FC, 41, 00, 00, 83, EC, 2C, 53, 33, DB, 43, 09, 1D, 1C, F0, 41, 00, 6A, 0A, E8, 42, C8, 00, 00, 85, C0, 0F, 84, 74, 01, 00, 00, 83, 65, EC, 00, 33, C0, 83, 0D, 1C, F0, 41, 00, 02, 33, C9, 56, 57, 89, 1D, FC, FC, 41, 00, 8D, 7D, D4, 53, 0F, A2, 8B, F3, 5B, 89...
 
[+]

Entropy:
4.1613

Code size:
85 KB (87,040 bytes)

Service
Display name:
oldoserv

Type:
Win32OwnProcess, InteractiveProcess


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

http://down.luckytool.net/.../oldoserc.exe

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