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s2cache.tmp

Skymonk Solutions Limited

The file s2cache.tmp by Skymonk Solutions Limited 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 update.skymonk.net.
Publisher:
Skymonk Solutions Limited  (signed and verified)

MD5:
aec4e6cf11dee03fa40464df3c57250d

SHA-1:
2f27d5d49d04ed4a76de95220aca3c28f1cfd420

SHA-256:
bc1a0b1434e382c7fb4328e266f09d7cf21237c38920a212744d5a43f37bd6e0

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:
11/23/2024 8:49:25 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP (M)
16.11.9.13

File size:
1.1 MB (1,118,736 bytes)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\users\{user}\appdata\local\temp\s2cache.tmp

Digital Signature
Signed by:
Skymonk Solutions Limited

Authority:
VeriSign, Inc.

Valid from:
4/9/2012 6:00:00 AM

Valid to:
4/10/2015 5:59:59 AM

Subject:
CN=Skymonk Solutions Limited, OU=Digital ID Class 3 - Microsoft Software Validation v2, O=Skymonk Solutions Limited, L=Tortola, S=Tortola, C=VG

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:
632A5F301191DF03C4933D982BAD525F

File PE Metadata
Compilation timestamp:
2/25/2012 1:22:01 AM

OS version:
5.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
10.0

CTPH (ssdeep):
24576:xknb1l21D6iq6v/863dq1Y8dx2a0nDG320bgqYXhR:G1MhDvkAq1Vdx2a0irbT0R

Entry address:
0x36DA

Entry point:
81, EC, 84, 01, 00, 00, 53, 55, 56, 33, DB, 57, 89, 5C, 24, 1C, C7, 44, 24, 10, C0, 8A, 40, 00, 89, 5C, 24, 18, C6, 44, 24, 14, 20, FF, 15, 30, 80, 40, 00, 68, 01, 80, 00, 00, FF, 15, AC, 80, 40, 00, 53, FF, 15, A4, 82, 40, 00, 6A, 08, A3, 18, 36, 45, 00, E8, FD, 28, 00, 00, 53, 68, 60, 01, 00, 00, A3, 28, 35, 45, 00, 8D, 44, 24, 3C, 50, 53, 68, BF, 8A, 40, 00, FF, 15, 70, 81, 40, 00, 68, B4, 8A, 40, 00, 68, 20, F5, 44, 00, E8, 27, 26, 00, 00, FF, 15, A8, 80, 40, 00, 50, BF, 50, C0, 47, 00, 57, E8, 15, 26...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
28 KB (28,672 bytes)

The file s2cache.tmp has been seen being distributed by the following URL.

http://update.skymonk.net/.../s2setup_mruwts.exe

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