Analysis
- max time kernel
149s - max time network
155s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
09/07/2023, 15:02
General
- Target 88885269b4db455ec1a487c78.exe
- Size 224KB
- Sample230709-sepvmsec8t
- SHA256 88885269b4db455ec1a487c78f199554743e9d1152b876e8cc03cd99e6340491
Malware Config
Extracted
-
remcos
-
rawRaw
-
coto-ar.com:34087
-
audio_folder
MicRecords
-
audio_record_time
5
-
connect_delay
0
-
connect_interval
1
-
copy_file
remcos.exe
-
copy_folder
Remcos
-
delete_file
false
-
hide_file
false
-
hide_keylog_file
false
-
install_flag
false
-
keylog_crypt
false
-
keylog_file
logs.dat
-
keylog_flag
false
-
keylog_folder
remcos
-
mouse_option
false
-
mutex
Rmc-UODPLC
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
-
screenshot_path
%AppData%
-
screenshot_time
10
-
take_screenshot_option
false
-
take_screenshot_time
5
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.
- 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 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Program Files directory 2 IoCs
- Drops file in Windows directory 3 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\88885269b4db455ec1a487c78.exe"C:\Users\Admin\AppData\Local\Temp\88885269b4db455ec1a487c78.exe"1⤵
- Checks QEMU agent file
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\88885269b4db455ec1a487c78.exe"C:\Users\Admin\AppData\Local\Temp\88885269b4db455ec1a487c78.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
Loading Replay Monitor...
Downloads
System.dll
System.dll
System.dll
memory/2224-183-0x0000000006310000-0x0000000008921000-memory.dmp
memory/2224-184-0x0000000006310000-0x0000000008921000-memory.dmp
memory/5008-189-0x0000000001660000-0x0000000003C71000-memory.dmp
memory/5008-186-0x0000000001660000-0x0000000003C71000-memory.dmp
memory/5008-188-0x0000000000400000-0x0000000001654000-memory.dmp
memory/5008-185-0x0000000000400000-0x0000000001654000-memory.dmp
memory/5008-202-0x0000000000400000-0x0000000001654000-memory.dmp
memory/5008-206-0x0000000001660000-0x0000000003C71000-memory.dmp
memory/5008-208-0x0000000000400000-0x0000000001654000-memory.dmp
memory/5008-209-0x0000000000400000-0x0000000001654000-memory.dmp
memory/5008-210-0x0000000000400000-0x0000000001654000-memory.dmp
memory/5008-211-0x0000000000400000-0x0000000001654000-memory.dmp
memory/5008-212-0x0000000000400000-0x0000000001654000-memory.dmp
memory/5008-215-0x0000000000400000-0x0000000001654000-memory.dmp