Analysis
- max time kernel
151s - max time network
154s - platform
windows10_x64 - resource
win10v20210410 - submitted
24/08/2021, 06:35
General
- Target b3cbfb4b45563e3dc2cbfa9e9a5676da.exe
- Size 124KB
- Sample210824-pg2wdknzbe
- SHA256 41ab72f9ce1e64f569029d8b3f8c2fdf680fb75113b8d7451bc8d988cd5f6bd2
Malware Config
Signatures
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Checks QEMU agent file 2 TTPs 2 IoCs
Checks presence of QEMU agent, possibly to detect virtualization.
- Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\b3cbfb4b45563e3dc2cbfa9e9a5676da.exe"C:\Users\Admin\AppData\Local\Temp\b3cbfb4b45563e3dc2cbfa9e9a5676da.exe"1⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\b3cbfb4b45563e3dc2cbfa9e9a5676da.exe"C:\Users\Admin\AppData\Local\Temp\b3cbfb4b45563e3dc2cbfa9e9a5676da.exe"2⤵
- Checks QEMU agent file
- Suspicious use of NtSetInformationThreadHideFromDebugger
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/1852-116-0x0000000002B00000-0x0000000002B13000-memory.dmp
memory/1852-121-0x00000000777D0000-0x000000007795E000-memory.dmp
memory/1852-120-0x00007FF9E1410000-0x00007FF9E15EB000-memory.dmp
memory/1852-122-0x00000000777D0000-0x000000007795E000-memory.dmp
memory/3488-118-0x0000000000400000-0x0000000000553000-memory.dmp
memory/3488-119-0x0000000000401000-0x00000000004FD000-memory.dmp
memory/3488-123-0x0000000000560000-0x0000000000660000-memory.dmp
memory/3488-125-0x00000000777D0000-0x000000007795E000-memory.dmp
memory/3488-124-0x00007FF9E1410000-0x00007FF9E15EB000-memory.dmp
memory/3488-126-0x0000000000401000-0x0000000000541000-memory.dmp