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2536081_stp.exe

Komcore Corporation

The application 2536081_stp.exe by Komcore has been detected as a potentially unwanted program by 7 anti-malware scanners. The program is a setup application that uses the Inno Setup installer. The setup program uses the InstallCore engine which may bundle additional software offers including toolbars and browser extensions. The file has been seen being downloaded from dl-vip.appstore.baidu.co.th and multiple other hosts. While running, it connects to the Internet address 92b91b35.rdns.100tb.com on port 80 using the HTTP protocol.
Publisher:
Komcore Corporation  (signed and verified)

MD5:
eb6c5e39a43b78d71e5f99cb2e561d3a

SHA-1:
dce0b89cd861e2e92d176f27d3ff6eed1b9c4213

SHA-256:
38cb5c6700f36b915899b42febc4169e2de71e12c8b707c6d0002c6a6167d75e

Scanner detections:
7 / 68

Status:
Potentially unwanted

Explanation:
Uses the InstallCore download manager to install additional potentially unwanted software which may include extensions such as DealPly and various toolbars.

Analysis date:
4/19/2024 5:08:20 AM UTC  (today)

Scan engine
Detection
Engine version

Dr.Web
Trojan.Packed.25266
9.0.1.075

ESET NOD32
Win32/InstallCore.FJ (variant)
8.9495

F-Prot
W32/InstallCore.R.gen
v6.4.7.1.166

Rising Antivirus
PE:Malware.XPACK-LNR/Heur!1.5594
23.00.65.14314

SUPERAntiSpyware
PUP.InstallCore/Variant
10724

Trend Micro House Call
TROJ_GEN.F47V0107
7.2.75

Vba32 AntiVirus
Downware.InstallCore
3.12.24.3

File size:
621.5 KB (636,448 bytes)

File type:
Executable application (Win32 EXE)

Installer:
Inno Setup

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\2536081_stp.exe

Digital Signature
Signed by:
Komcore Corporation

Authority:
COMODO CA Limited

Valid from:
9/24/2013 1:00:00 AM

Valid to:
9/25/2014 12:59:59 AM

Subject:
CN=Komcore Corporation, O=Komcore Corporation, STREET="300 Avalon Drive #3476", L=Wood Ridge, S=New Jersey, PostalCode=07075, C=US

Issuer:
CN=COMODO Code Signing CA 2, O=COMODO CA Limited, L=Salford, S=Greater Manchester, C=GB

Serial number:
00FF5D7A28287F6E63C617031741E32633

File PE Metadata
Compilation timestamp:
6/19/1992 11:22:17 PM

OS version:
1.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
2.25

CTPH (ssdeep):
12288:RBMJfsGqFw3ihloZII3+2bCGKGae3QpZzaCIRSTqxSqwrkLMf:bMJfsjF0Wlmr+2bdKGalpZzaCISiwrkI

Entry address:
0x98CC

Entry point:
55, 8B, EC, 83, C4, CC, 53, 56, 57, 33, C0, 89, 45, F0, 89, 45, DC, E8, FA, 97, FF, FF, E8, 01, AA, FF, FF, E8, 2C, CC, FF, FF, E8, 73, CC, FF, FF, E8, 0A, F3, FF, FF, E8, 71, F4, FF, FF, 33, C0, 55, 68, 76, 9F, 40, 00, 64, FF, 30, 64, 89, 20, 33, D2, 55, 68, 2C, 9F, 40, 00, 64, FF, 32, 64, 89, 22, A1, 14, B0, 40, 00, E8, 9B, FE, FF, FF, E8, 26, FA, FF, FF, 8D, 55, F0, 33, C0, E8, E0, D0, FF, FF, 8B, 55, F0, B8, D8, BD, 40, 00, E8, AB, 98, FF, FF, 6A, 02, 6A, 00, 6A, 01, 8B, 0D, D8, BD, 40, 00, B2, 01, B8...
 
[+]

Packer / compiler:
Inno Setup v5.x - Installer Maker

Code size:
36 KB (36,864 bytes)

The file 2536081_stp.exe has been seen being distributed by the following 2 URLs.

http://dl-vip.appstore.baidu.co.th/.../music-chow-1.0.1-x32.exe

http://download.musicchow.com/musicchow.exe

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

TCP (HTTP):
Connects to ec2-54-232-222-104.sa-east-1.compute.amazonaws.com  (54.232.222.104:80)

TCP (HTTP):
Connects to ec2-54-207-84-20.sa-east-1.compute.amazonaws.com  (54.207.84.20:80)

TCP (HTTP):
Connects to 92b91b35.rdns.100tb.com  (146.185.27.53:80)

TCP (HTTP):
Connects to 50.115.122.45.static.westdc.net  (50.115.122.45:80)

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