Analysis
- max time kernel
149s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
09/08/2024, 01:07
General
- Target 2bda6048a888003443cd18df65f75441974ea3dfa04d524c957b0d7c268654dc.exe
- Size 750KB
- Sample240809-bg2tjstfjl
- SHA256 2bda6048a888003443cd18df65f75441974ea3dfa04d524c957b0d7c268654dc
Malware Config
Extracted
-
remcos
-
RemoteHost
-
45.66.231.198:2404
-
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-UPNP8J
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
-
screenshot_path
%AppData%
-
screenshot_time
10
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Loads dropped DLL 1 IoCs
- 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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2bda6048a888003443cd18df65f75441974ea3dfa04d524c957b0d7c268654dc.exe"C:\Users\Admin\AppData\Local\Temp\2bda6048a888003443cd18df65f75441974ea3dfa04d524c957b0d7c268654dc.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\2bda6048a888003443cd18df65f75441974ea3dfa04d524c957b0d7c268654dc.exe"C:\Users\Admin\AppData\Local\Temp\2bda6048a888003443cd18df65f75441974ea3dfa04d524c957b0d7c268654dc.exe"2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
System.dll
rijksdaalder.lnk
memory/2712-674-0x0000000077471000-0x0000000077591000-memory.dmp
memory/2712-675-0x00000000740C5000-0x00000000740C6000-memory.dmp
memory/3344-684-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-687-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-678-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-682-0x0000000077471000-0x0000000077591000-memory.dmp
memory/3344-676-0x00000000774F8000-0x00000000774F9000-memory.dmp
memory/3344-685-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-686-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-677-0x0000000077515000-0x0000000077516000-memory.dmp
memory/3344-688-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-689-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-690-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-691-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-692-0x00000000004A0000-0x00000000016F4000-memory.dmp
memory/3344-694-0x00000000004A0000-0x00000000016F4000-memory.dmp