Analysis
- max time kernel
148s - max time network
148s - platform
windows11-21h2_x64 - resource
win11-20250410-en - resource tags
- submitted
23/04/2025, 03:58
General
- Target docs917221433.bat.exe
- Size 1.0MB
- Sample250423-ejk6cswwbv
- SHA256 1a77b488a1800828543b6983bbb531e06bd95b00ea26bc2eeb2994e0f2f60236
Malware Config
Extracted
-
remcos
-
BN@REMY
-
196.251.116.190:2404
-
196.251.116.190:2004
-
196.251.116.190:4507
-
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-CUJ14B
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
-
screenshot_path
%AppData%
-
screenshot_time
10
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Guloader family
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Remcos family
- Loads dropped DLL 2 IoCs
- Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 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 SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\docs917221433.bat.exe"C:\Users\Admin\AppData\Local\Temp\docs917221433.bat.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\docs917221433.bat.exe"C:\Users\Admin\AppData\Local\Temp\docs917221433.bat.exe"2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
logs.dat
System.dll
memory/348-26-0x00007FF9E85E1000-0x00007FF9E870A000-memory.dmp
memory/348-27-0x00007FF9E85E0000-0x00007FF9E87E9000-memory.dmp
memory/2724-54-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-60-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-45-0x00007FF9E85E0000-0x00007FF9E87E9000-memory.dmp
memory/2724-46-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-50-0x00000000017D0000-0x0000000006A18000-memory.dmp
memory/2724-52-0x00007FF9E85E0000-0x00007FF9E87E9000-memory.dmp
memory/2724-29-0x00007FF9E85E0000-0x00007FF9E87E9000-memory.dmp
memory/2724-57-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-28-0x00000000017D0000-0x0000000006A18000-memory.dmp
memory/2724-41-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-63-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-66-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-69-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-72-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-75-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-78-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-84-0x00000000004B0000-0x00000000017C7000-memory.dmp
memory/2724-87-0x00000000004B0000-0x00000000017C7000-memory.dmp