Analysis
- max time kernel
149s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
07/07/2023, 12:26
General
- Target Request For Quotation RFQ3758.exe
- Size 170KB
- Sample230707-pl66qaaa8w
- SHA256 7feb0133d36aafdd1b2ba2dbae6ea92c8cefee7b48b82cbcd736dc729196a3e5
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 2 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- Legitimate hosting services abused for malware hosting/C2 1 TTPs
- Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Windows directory 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\Request For Quotation RFQ3758.exe"C:\Users\Admin\AppData\Local\Temp\Request For Quotation RFQ3758.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Request For Quotation RFQ3758.exe"C:\Users\Admin\AppData\Local\Temp\Request For Quotation RFQ3758.exe"2⤵
- Checks QEMU agent file
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
System.dll
System.dll
System.dll
memory/208-148-0x0000000005410000-0x0000000006081000-memory.dmp
memory/208-149-0x0000000005410000-0x0000000006081000-memory.dmp
memory/4896-150-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4896-151-0x0000000001660000-0x00000000022D1000-memory.dmp
memory/4896-153-0x0000000000400000-0x0000000001654000-memory.dmp
memory/4896-163-0x0000000001660000-0x00000000022D1000-memory.dmp
memory/4896-167-0x0000000001660000-0x00000000022D1000-memory.dmp
memory/4896-169-0x0000000001660000-0x00000000022D1000-memory.dmp