Analysis
- max time kernel
149s - max time network
146s - platform
windows10-2004_x64 - resource
win10v2004-20260130-en - resource tags
- submitted
31/03/2026, 23:26
General
- Target transaction report.exe
- Size 267KB
- Sample260331-3es76sh13s
- SHA256 bfd37bd93dd704927aa58505d0d8215b2e1dd8dc6e69cde508531f1df6cf2d17
Malware Config
Extracted
-
remcos
-
7.2.1 Pro
-
RemoteHost
-
172.245.4.226:2404
-
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
true
-
keylog_crypt
false
-
keylog_file
logs.dat
-
keylog_flag
false
-
keylog_folder
remcos
-
mouse_option
false
-
mutex
Rmc-8PO6T1
-
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 3 IoCs
- Loads dropped DLL 5 IoCs
- Adds Run key to start application 2 TTPs 4 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 3 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Suspicious use of NtCreateThreadExHideFromDebugger 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 4 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 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- NSIS installer 2 IoCs
- Suspicious behavior: MapViewOfSection 2 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\transaction report.exe"C:\Users\Admin\AppData\Local\Temp\transaction report.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- 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\transaction report.exe"C:\Users\Admin\AppData\Local\Temp\transaction report.exe"2⤵
-
-
C:\Users\Admin\AppData\Local\Temp\transaction report.exe"C:\Users\Admin\AppData\Local\Temp\transaction report.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\transaction report.exe"C:\Users\Admin\AppData\Local\Temp\transaction report.exe"3⤵
-
-
C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"3⤵
- Executes dropped EXE
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Executes dropped EXE
-
-
C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"5⤵
- Executes dropped EXE
-
-
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
remcos.exe
05DDC6AA91765AACACDB0A5F96DF8199
24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
4FA45AE1010E09657982D8D28B3BD38E_5EC5F15E90CE3367DAA957D66231D354
B3513D73A177A2707D910183759B389B_550D7637D8A8DBA8382B5E4B505F43EE
05DDC6AA91765AACACDB0A5F96DF8199
24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
4FA45AE1010E09657982D8D28B3BD38E_5EC5F15E90CE3367DAA957D66231D354
B3513D73A177A2707D910183759B389B_550D7637D8A8DBA8382B5E4B505F43EE
nsf4EE.tmp
nsf4EE.tmp
nsf4EE.tmp
nsf4EE.tmp
System.dll
nsm491B.tmp
nsp57D.tmp
nsq66A.tmp
nsr498B.tmp
nsu54D.tmp
nsu54D.tmp
nsv59E.tmp
nsw495B.tmp
nsw495B.tmp
Pre
agons.pro
discrepate.out
haandvrksbagerens.tek
tilbagevistes.cat
memory/4292-562-0x00000000008D0000-0x000000000092F000-memory.dmp
memory/4292-561-0x0000000074174000-0x0000000074175000-memory.dmp
memory/4440-1165-0x0000000000920000-0x000000000097F000-memory.dmp
memory/4784-564-0x00000000775B9000-0x00000000775BA000-memory.dmp
memory/4784-591-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/4784-592-0x00000000358E0000-0x000000003593F000-memory.dmp
memory/4784-578-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/4784-583-0x0000000077491000-0x00000000775B1000-memory.dmp
memory/4784-565-0x0000000077535000-0x0000000077536000-memory.dmp
memory/4784-563-0x0000000077518000-0x0000000077519000-memory.dmp
memory/5852-1176-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1181-0x0000000035900000-0x000000003595F000-memory.dmp
memory/5852-1180-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1182-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1184-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1186-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1188-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1190-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1192-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1194-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1196-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1198-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1200-0x0000000000450000-0x00000000016A4000-memory.dmp
memory/5852-1202-0x0000000000450000-0x00000000016A4000-memory.dmp