Analysis
- max time kernel
148s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20250502-en - resource tags
- submitted
07/06/2025, 12:57
General
- Target 3171924_PO_001.js
- Size 829KB
- Sample250607-p64lbsssgw
- SHA256 c890802b9bd6319c752eeea4a97e6050483ac466ea553c6c83689f86c9614743
Malware Config
Extracted
-
remcos
-
RemoteHost
-
164.68.116.238:2404
-
audio_folder
MicRecords
-
audio_path
ApplicationPath
-
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-BGRWGL
-
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.
- Remcos family
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Command and Scripting Interpreter: JavaScript 1 TTPs
- 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 use of WriteProcessMemory 13 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\3171924_PO_001.js1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\x.exe"C:\Users\Admin\AppData\Local\Temp\x.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\x.exe"C:\Users\Admin\AppData\Local\Temp\x.exe"3⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
x.exe
memory/2208-33-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-35-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-41-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-40-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-39-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-24-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-36-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-28-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-21-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-19-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-23-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-27-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-34-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-38-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-30-0x0000000000400000-0x0000000000481000-memory.dmp
memory/2208-29-0x0000000000400000-0x0000000000481000-memory.dmp
memory/3936-26-0x00000000743E0000-0x0000000074B90000-memory.dmp
memory/3936-11-0x00000000743EE000-0x00000000743EF000-memory.dmp
memory/3936-12-0x0000000000030000-0x00000000000D4000-memory.dmp
memory/3936-18-0x0000000004A00000-0x0000000004A14000-memory.dmp
memory/3936-17-0x00000000743E0000-0x0000000074B90000-memory.dmp
memory/3936-16-0x0000000004CE0000-0x0000000004D6C000-memory.dmp
memory/3936-15-0x00000000743EE000-0x00000000743EF000-memory.dmp
memory/3936-14-0x0000000005090000-0x0000000005634000-memory.dmp
memory/3936-13-0x0000000004A20000-0x0000000004ABC000-memory.dmp