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youm.exe

Xin Zhou

The executable youm.exe has been detected as malware by 1 anti-virus scanner. This is a setup program which is used to install the application. The file has been seen being downloaded from dgkytklfjrqkb.cloudfront.net.
Publisher:
Xin Zhou  (signed and verified)

MD5:
415113a54880c358e7e6c38219e36d04

SHA-1:
043e2604083931657eb4fc3931e5050943e8ecf5

SHA-256:
c8d881337e9a7236250d5514903c2054448ccc2a99f2fc6e02aba67e48dcb1c9

Scanner detections:
1 / 68

Status:
Malware

Analysis date:
10/14/2025 1:09:52 AM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP (M)
16.11.25.1

File size:
420.7 KB (430,808 bytes)

File type:
Executable application (Win32 EXE)

Common path:
C:\windows\temp\youm.exe

Digital Signature
Signed by:
Xin Zhou

Authority:
thawte, Inc.

Valid from:
11/4/2016 2:00:00 AM

Valid to:
3/23/2017 1:59:59 AM

Subject:
CN=Xin Zhou, OU=Individual Developer, O=No Organization Affiliation, L=Beijing, S=Beijing, C=CN

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

Serial number:
3D50F36E24BBF7552E2B85DBBD2AECCC

File PE Metadata
Compilation timestamp:
11/9/2016 1:16:51 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
6144:7teFRXnGDdR/3MASfPrWUar5gecCGPFkzJ5VhKE+yE2DNu8mpttLKRPII7RXUsr:ReWDL/TwjWUKMVPut5V3I8mhLwPF1

Entry address:
0x9A25

Entry point:
E8, 2E, F1, FF, FF, E9, 0E, 34, 00, 00, 68, 42, 93, 40, 00, FF, 15, 44, F0, 45, 00, A3, BC, 82, 46, 00, C3, 55, 8B, EC, 83, EC, 44, 8D, 45, BC, 50, FF, 15, A0, F0, 45, 00, F6, 45, E8, 01, 74, 06, 0F, B7, 45, EC, EB, 03, 6A, 0A, 58, 8B, E5, 5D, C3, E8, DC, BE, FF, FF, 85, C0, 75, 06, B8, 74, 61, 46, 00, C3, 83, C0, 0C, C3, 6A, 08, E8, A9, 8F, FF, FF, 59, C3, 55, 8B, EC, 51, 51, 53, 8B, 59, 04, B8, B0, 44, 46, 00, 56, 8B, 31, 57, 33, FF, 39, 7E, 7C, 74, 6B, 8B, 76, 78, 03, F3, 8B, 56, 18, 85, D2, 74, 5F, 39...
 
[+]

Entropy:
7.7774  (probably packed)

Code size:
372.5 KB (381,440 bytes)

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

http://dgkytklfjrqkb.cloudfront.net/.../yomz.exe

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