Analysis
- max time kernel
147s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240508-en - resource tags
- submitted
03/07/2024, 03:58
General
- Target 36f35efd807b1351ab0a8513f6c5853e536cc8f4bfa326acd2eff5ffedefc46a.exe
- Size 2.0MB
- Sample240703-ejh11azgrl
- SHA256 36f35efd807b1351ab0a8513f6c5853e536cc8f4bfa326acd2eff5ffedefc46a
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.
- 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\36f35efd807b1351ab0a8513f6c5853e536cc8f4bfa326acd2eff5ffedefc46a.exe"C:\Users\Admin\AppData\Local\Temp\36f35efd807b1351ab0a8513f6c5853e536cc8f4bfa326acd2eff5ffedefc46a.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/876-32-0x0000000000400000-0x0000000000417000-memory.dmp
memory/876-46-0x0000000000400000-0x0000000000417000-memory.dmp
memory/876-42-0x0000000000400000-0x0000000000417000-memory.dmp
memory/876-41-0x0000000000400000-0x0000000000417000-memory.dmp
memory/876-39-0x0000000000400000-0x0000000000417000-memory.dmp
memory/876-36-0x0000000000400000-0x0000000000417000-memory.dmp
memory/876-35-0x0000000000400000-0x0000000000417000-memory.dmp
memory/1460-16-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/1460-27-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/1460-0-0x0000000074B42000-0x0000000074B43000-memory.dmp
memory/1460-4-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/1460-3-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/1460-2-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/1460-1-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/2756-29-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/2756-30-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/2756-31-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/2756-28-0x0000000074B40000-0x00000000750F1000-memory.dmp
memory/2756-43-0x0000000074B40000-0x00000000750F1000-memory.dmp