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um7rttcpf.exe

Yuanyuan Zhang

The application um7rttcpf.exe by Yuanyuan Zhang has been detected as a potentially unwanted program by 1 anti-malware scanner with very strong indications that the file is a potential threat. This is a setup program which is used to install the application. The file has been seen being downloaded from dgkytklfjrqkb.cloudfront.net.
Publisher:
Yuanyuan Zhang  (signed and verified)

MD5:
72e0a0bdd86c8c016bc4fb51ed5eacbc

SHA-1:
6e17979ee97a02faa2e85c9b61dbd04cd253e5d7

SHA-256:
1775af836282ca561b288f1d60ac2140571294c71de33d2839bc690eb4de03d8

Scanner detections:
1 / 68

Status:
Potentially unwanted

Analysis date:
4/10/2026 10:06:35 PM UTC  (today)

Scan engine
Detection
Engine version

Reason Heuristics
PUP.Mutahba (M)
16.10.22.5

File size:
415.4 KB (425,392 bytes)

File type:
Executable application (Win32 EXE)

Common path:
C:\users\{user}\appdata\local\temp\{random}.tmp\um7rttcpf.exe

Digital Signature
Signed by:
Yuanyuan Zhang

Authority:
thawte, Inc.

Valid from:
10/11/2016 7:00:00 AM

Valid to:
4/21/2017 6:59:59 AM

Subject:
CN=Yuanyuan Zhang, 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:
173289734913F0DE2C937F585965970D

File PE Metadata
Compilation timestamp:
10/12/2016 6:51:55 PM

OS version:
5.1

OS bitness:
Win32

Subsystem:
Windows GUI

Linker version:
12.0

CTPH (ssdeep):
12288:0IjIOeonjXj5VRB5rUJAZCNIL1/4sNXk7s4+BC:0we6Xj57QmMNIL1/4sdk7s9BC

Entry address:
0x291E

Entry point:
E8, 57, F2, FF, FF, E9, 70, 9F, 00, 00, 55, 8B, EC, 81, EC, 94, 06, 00, 00, A1, 18, 40, 46, 00, 33, C5, 89, 45, FC, 53, 56, 57, 6A, 40, 8B, D9, 33, FF, 5A, 89, 9D, 70, F9, FF, FF, 8B, F7, E8, 40, 8A, 00, 00, 85, C0, 75, 34, 68, 1E, 02, 00, 00, 66, 89, 85, DC, FD, FF, FF, 8D, 85, DE, FD, FF, FF, 57, 50, E8, 81, C6, 00, 00, 83, C4, 0C, 8D, 85, DC, FD, FF, FF, 57, 50, 68, 14, 26, 46, 00, FF, 15, 18, D0, 45, 00, E9, 11, 03, 00, 00, 8B, 4B, 3C, 8D, 91, F8, 00, 00, 00, E8, FA, 89, 00, 00, 85, C0, 0F, 84, FB, 02...
 
[+]

Entropy:
7.8106  (probably packed)

Code size:
366 KB (374,784 bytes)

The file um7rttcpf.exe has been seen being distributed by the following URL.

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

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