Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240709-en - resource tags
- submitted
24/07/2024, 01:52
General
- Target b47bab6180af2d5a6d5317d311fbd94704c8504cc9bfe33014be4256fdce5531.exe
- Size 139KB
- Sample240724-caqndavbne
- SHA256 b47bab6180af2d5a6d5317d311fbd94704c8504cc9bfe33014be4256fdce5531
Malware Config
Extracted
-
remcos
-
1.7 Pro
-
Host
-
systemcontrol.ddns.net:45000
-
systemcontrol2.ddns.net:45000
-
audio_folder
audio
-
audio_path
%AppData%
-
audio_record_time
5
-
connect_delay
0
-
connect_interval
5
-
copy_file
OfficeUpgrade.exe
-
copy_folder
OfficeUpgrade
-
delete_file
false
-
hide_file
true
-
hide_keylog_file
true
-
install_flag
false
-
install_path
%AppData%
-
keylog_crypt
true
-
keylog_file
Upgrader.dat
-
keylog_flag
false
-
keylog_folder
Upgrader
-
keylog_path
%AppData%
-
mouse_option
false
-
mutex
req_khauflaoyr
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screens
-
screenshot_path
%AppData%
-
screenshot_time
1
-
startup_value
OfficeUpgrade
-
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
- 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).
- System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 12 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\b47bab6180af2d5a6d5317d311fbd94704c8504cc9bfe33014be4256fdce5531.exe"C:\Users\Admin\AppData\Local\Temp\b47bab6180af2d5a6d5317d311fbd94704c8504cc9bfe33014be4256fdce5531.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"C:\Users\Admin\AppData\Roaming\raj4dkhhiap\wn2ra4ohzdr.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
wn2ra4ohzdr.exe
memory/884-30-0x0000000000400000-0x0000000000417000-memory.dmp
memory/884-29-0x0000000000400000-0x0000000000417000-memory.dmp
memory/884-25-0x0000000000400000-0x0000000000417000-memory.dmp
memory/884-26-0x0000000000400000-0x0000000000417000-memory.dmp
memory/884-23-0x0000000000400000-0x0000000000417000-memory.dmp
memory/884-24-0x0000000000400000-0x0000000000417000-memory.dmp
memory/2024-21-0x0000000075100000-0x00000000758B0000-memory.dmp
memory/2024-22-0x0000000075100000-0x00000000758B0000-memory.dmp
memory/2024-34-0x0000000075100000-0x00000000758B0000-memory.dmp
memory/2300-0-0x000000007510E000-0x000000007510F000-memory.dmp
memory/2300-20-0x0000000075100000-0x00000000758B0000-memory.dmp
memory/2300-6-0x0000000005470000-0x0000000005490000-memory.dmp
memory/2300-5-0x0000000075100000-0x00000000758B0000-memory.dmp
memory/2300-4-0x0000000002970000-0x000000000297A000-memory.dmp
memory/2300-3-0x0000000004EF0000-0x0000000004F82000-memory.dmp
memory/2300-2-0x00000000054A0000-0x0000000005A44000-memory.dmp
memory/2300-1-0x00000000004A0000-0x00000000004C8000-memory.dmp