Analysis
- max time kernel
299s - max time network
300s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260911-en - resource tags
- submitted
31/10/2026, 21:28
General
- Target packagecache_x64_data.exe
- Size 3.4MB
- Sample261031-1be52af19l
- SHA256 2d7398c86e5a8509a8b12a0475ad181daa1232f3e2804fd88b04ea79ef915b86
Malware Config
Extracted
-
onyxc2
-
sanssharessfile.click
-
port
443
-
url_path
/Z4f5vmhR/backend/api/app.php
Signatures
- Family: OnyxC2
OnyxC2 is a Windows backdoor written in C++.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 4 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Windows\Explorer.EXEC:\Windows\Explorer.EXE1⤵
- Checks processor information in registry
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Local\Temp\packagecache_x64_data.exe"C:\Users\Admin\AppData\Local\Temp\packagecache_x64_data.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
memory/3412-20-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-19-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-14-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-18-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-25-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-24-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-22-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-21-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-3-0x0000000001470000-0x0000000001471000-memory.dmp
memory/3412-17-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-5-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-16-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-15-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-13-0x0000000180000000-0x000000018030C000-memory.dmp
memory/3412-23-0x0000000180000000-0x000000018030C000-memory.dmp
memory/4700-0-0x0000000000400000-0x0000000000776000-memory.dmp
memory/4700-2-0x0000000000400000-0x0000000000776000-memory.dmp