Analysis
- max time kernel
151s - max time network
154s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
02/08/2023, 09:01
General
- Target ASCD23104 SPEC.exe
- Size 332KB
- Sample230802-kyw43afa2t
- SHA256 363b7aaa875c65c3c134a3c2051a4bd8fa5a9a1376597609f95a43b219e56bd3
Malware Config
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Loads dropped DLL 2 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\ASCD23104 SPEC.exe"C:\Users\Admin\AppData\Local\Temp\ASCD23104 SPEC.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\ASCD23104 SPEC.exe"C:\Users\Admin\AppData\Local\Temp\ASCD23104 SPEC.exe"2⤵
- Checks QEMU agent file
- Adds Run key to start application
- Suspicious use of NtSetInformationThreadHideFromDebugger
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
System.dll
System.dll
System.dll
memory/464-147-0x0000000002A90000-0x0000000003DFA000-memory.dmp
memory/464-148-0x0000000002A90000-0x0000000003DFA000-memory.dmp
memory/464-149-0x00000000776C1000-0x00000000777E1000-memory.dmp
memory/464-150-0x0000000010000000-0x0000000010006000-memory.dmp
memory/3848-151-0x0000000000400000-0x0000000001654000-memory.dmp
memory/3848-152-0x0000000001660000-0x00000000029CA000-memory.dmp
memory/3848-153-0x0000000001660000-0x00000000029CA000-memory.dmp
memory/3848-154-0x00000000776C1000-0x00000000777E1000-memory.dmp
memory/3848-155-0x0000000077748000-0x0000000077749000-memory.dmp
memory/3848-156-0x00000000776C1000-0x00000000777E1000-memory.dmp
memory/3848-158-0x0000000000400000-0x0000000001654000-memory.dmp