Analysis
- max time kernel
149s - max time network
149s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
- submitted
20/05/2026, 16:50
General
- Target scan.exe
- Size 455KB
- Sample260520-vcchmset3q
- SHA256 aa1105659d2cba649744a8fab29478af596927dd6bd8da12db3d8a5bf2d3a15a
Score
10/10
Malware Config
Signatures
- Family: Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Loads dropped DLL 2 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Drops file in System32 directory 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Drops file in Program Files directory 1 IoCs
- Drops file in Windows directory 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\scan.exe"C:\Users\Admin\AppData\Local\Temp\scan.exe"1⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\scan.exe"C:\Users\Admin\AppData\Local\Temp\scan.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\scan.exe"C:\Users\Admin\AppData\Local\Temp\scan.exe"2⤵
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\scan.exe"C:\Users\Admin\AppData\Local\Temp\scan.exe"3⤵
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
System.dll
nsh564C.tmp
nsm566C.tmp
nsr56DA.tmp
nss57C6.tmp
nsw560C.tmp
nsw560C.tmp
memory/956-561-0x0000000004DB0000-0x0000000007FF6000-memory.dmp
memory/956-562-0x0000000074715000-0x0000000074716000-memory.dmp
memory/956-563-0x0000000004DB0000-0x0000000007FF6000-memory.dmp
memory/1776-575-0x0000000000490000-0x00000000017A7000-memory.dmp
memory/1776-576-0x00000000017B0000-0x00000000049F6000-memory.dmp