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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. The file has been seen being downloaded from update.skymonk.net.
Publisher:
Skymonk Solutions Limited  (signed and verified)

MD5:
a55dea79ded083a16b3690d205b48f25

SHA-1:
6e3da94f36621587107ff4f51531325bca171531

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:
11/27/2024 6:44:32 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.SkymonkSolutions.Installer (M)
16.2.15.11

File size:
1.3 MB (1,360,520 bytes)

Installer:
NSIS (Nullsoft Scriptable Install System)

Common path:
C:\Documents and Settings\{user}\Local settings\temp\s2cache.tmp

Digital Signature
Signed by:
Skymonk Solutions Limited

Authority:
VeriSign, Inc.

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

Valid to:
4/10/2015 3:59:59 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:
11/27/2013 10:18:53 AM

OS version:
4.0

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
8.0

CTPH (ssdeep):
24576:VycSEbRTB6CSQ9en6mq6pQZ1Y8dH2a0nDG320bgqYHQRTU61JQEs:FHWHnKZ1VdH2a0irbTPs

Entry address:
0x38DA

Entry point:
81, EC, D4, 02, 00, 00, 53, 55, 56, 57, 6A, 20, 33, ED, 5E, 89, 6C, 24, 18, C7, 44, 24, 10, 68, A2, 40, 00, 89, 6C, 24, 14, FF, 15, 30, 90, 40, 00, 68, 01, 80, 00, 00, FF, 15, B4, 90, 40, 00, 55, FF, 15, C0, 92, 40, 00, 6A, 08, A3, 98, EB, 47, 00, E8, 0D, 2A, 00, 00, 55, 68, B4, 02, 00, 00, A3, B0, EA, 47, 00, 8D, 44, 24, 38, 50, 55, 68, 64, A2, 40, 00, FF, 15, 84, 91, 40, 00, 68, 4C, A2, 40, 00, 68, A0, 6A, 47, 00, E8, EF, 26, 00, 00, FF, 15, B0, 90, 40, 00, 50, BF, A0, F0, 4C, 00, 57, E8, DD, 26, 00, 00...
 
[+]

Packer / compiler:
Nullsoft install system v2.x

Code size:
28.5 KB (29,184 bytes)

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

http://update.skymonk.net/.../s2setup_mrumobth.exe

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