Analysis
- max time kernel
141s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
21/05/2024, 03:38
General
- Target bf5cd46d2e230d35d6329b1974c78289ccbe53106354d91c776e2d3c3ed4278f.exe
- Size 1.4MB
- Sample240521-d65ylsgf71
- SHA256 bf5cd46d2e230d35d6329b1974c78289ccbe53106354d91c776e2d3c3ed4278f
Malware Config
Extracted
-
remcos
-
1.7 Pro
-
Host
-
213.183.58.19:4000
-
audio_folder
audio
-
audio_path
%AppData%
-
audio_record_time
5
-
connect_delay
0
-
connect_interval
5
-
copy_file
remcos.exe
-
copy_folder
remcos
-
delete_file
false
-
hide_file
false
-
hide_keylog_file
true
-
install_flag
false
-
install_path
%AppData%
-
keylog_crypt
true
-
keylog_file
read.dat
-
keylog_flag
false
-
keylog_folder
CastC
-
keylog_path
%AppData%
-
mouse_option
false
-
mutex
remcos_sccafsoidz
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screens
-
screenshot_path
%AppData%
-
screenshot_time
1
-
startup_value
remcos
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- detects Windows exceutables potentially bypassing UAC using eventvwr.exe 12 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 12 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 12 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\bf5cd46d2e230d35d6329b1974c78289ccbe53106354d91c776e2d3c3ed4278f.exe"C:\Users\Admin\AppData\Local\Temp\bf5cd46d2e230d35d6329b1974c78289ccbe53106354d91c776e2d3c3ed4278f.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Templates\sbietrcl.exe"3⤵
- Executes dropped EXE
- Suspicious use of SetWindowsHookEx
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
sbietrcl.exe
memory/1528-43-0x0000000074B10000-0x00000000750C1000-memory.dmp
memory/1528-31-0x0000000074B10000-0x00000000750C1000-memory.dmp
memory/1528-30-0x0000000074B10000-0x00000000750C1000-memory.dmp
memory/1528-28-0x0000000074B10000-0x00000000750C1000-memory.dmp
memory/4024-32-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-48-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-58-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-56-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-53-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-51-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-35-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-36-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-39-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-40-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-42-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4024-46-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4456-1-0x0000000074B10000-0x00000000750C1000-memory.dmp
memory/4456-6-0x0000000074B10000-0x00000000750C1000-memory.dmp
memory/4456-0-0x0000000074B12000-0x0000000074B13000-memory.dmp
memory/4456-2-0x0000000074B10000-0x00000000750C1000-memory.dmp
memory/4456-5-0x0000000074B10000-0x00000000750C1000-memory.dmp
memory/4456-29-0x0000000074B10000-0x00000000750C1000-memory.dmp