remcos | 35753205824385db17dde943a79bfb11f12383ad261ea6c068fa4785a13cf898

Analysis

max time kernel
150s
max time network
131s
platform
windows11-21h2_x64
resource
win11-20260513-en
resource tags

arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
24/05/2026, 22:26

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General

Target
tmpn4np07n9.exe
Size 1.5MB
Sample260524-2cmryaby5v
SHA256 35753205824385db17dde943a79bfb11f12383ad261ea6c068fa4785a13cf898
MD5 99731be4c31c12cff3d6f1111fdc001d
SHA1 7408ab9f41b39e751c95652f42fb3f15a973b2c4
SHA512 fa5a1f5003a119cfeb387cb6a1622d7792f1a11a42f8115406d08af418d120bc9c846bd1ebb4452e41d5d2dff2d57303363c04355b901bf8d917dd65c18731db
SSDEEP 24576:zaTg0wZ14X27uUL3VM0kd+rkhfMsjgkAj2JE06J5N0FJ:+Tg3ZOcuUL3xAx/8b2S7Z0H
TLSH
T1EC7523FA8E706892D5BD463205AF0F6D75F54FF37A14AC4311713D2A2F3A267A920A1C
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

chinemerem discovery execution remcos persistence rat

Malware Config

Extracted

Family

remcos

Version

2.2.2 Pro

Botnet

chinemerem

remcoss.onmypc.org:3765

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
false
hide_file
false
hide_keylog_file
true
install_flag
false
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
r-8ET8H0
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Family: Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos

Executes dropped EXE 4 IoCs

pid	Process
1704	AboutSettingsHandlers.exe
3472	AboutSettingsHandlers.exe
4416	AboutSettingsHandlers.exe
5052	AboutSettingsHandlers.exe

AutoIT Executable 6 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral3/memory/3092-17-0x0000000000DE0000-0x0000000000F69000-memory.dmp	autoit_exe
behavioral3/memory/3092-22-0x0000000000DE0000-0x0000000000F69000-memory.dmp	autoit_exe
behavioral3/memory/1704-35-0x0000000000DE0000-0x0000000000F69000-memory.dmp	autoit_exe
behavioral3/memory/1704-38-0x0000000000DE0000-0x0000000000F69000-memory.dmp	autoit_exe
behavioral3/memory/4416-55-0x0000000000DE0000-0x0000000000F69000-memory.dmp	autoit_exe
behavioral3/memory/4416-57-0x0000000000DE0000-0x0000000000F69000-memory.dmp	autoit_exe

Suspicious use of SetThreadContext 3 IoCs

description	pid	Process	procid_target
PID 3092 set thread context of 4184	3092	tmpn4np07n9.exe	81
PID 1704 set thread context of 3472	1704	AboutSettingsHandlers.exe	86
PID 4416 set thread context of 5052	4416	AboutSettingsHandlers.exe	90

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmpn4np07n9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tmpn4np07n9.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AboutSettingsHandlers.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	AboutSettingsHandlers.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1428	schtasks.exe
1804	schtasks.exe
4924	schtasks.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4184	tmpn4np07n9.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3092 wrote to memory of 4184	3092	tmpn4np07n9.exe	81
PID 3092 wrote to memory of 4184	3092	tmpn4np07n9.exe	81
PID 3092 wrote to memory of 1428	3092	tmpn4np07n9.exe	82
PID 1704 wrote to memory of 3472	1704	AboutSettingsHandlers.exe	86
PID 1704 wrote to memory of 3472	1704	AboutSettingsHandlers.exe	86
PID 1704 wrote to memory of 1804	1704	AboutSettingsHandlers.exe	87
PID 4416 wrote to memory of 5052	4416	AboutSettingsHandlers.exe	90
PID 4416 wrote to memory of 5052	4416	AboutSettingsHandlers.exe	90
PID 4416 wrote to memory of 4924	4416	AboutSettingsHandlers.exe	91

C:\Users\Admin\AppData\Local\Temp\tmpn4np07n9.exe
"C:\Users\Admin\AppData\Local\Temp\tmpn4np07n9.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3092
- C:\Users\Admin\AppData\Local\Temp\tmpn4np07n9.exe
  "C:\Users\Admin\AppData\Local\Temp\tmpn4np07n9.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of SetWindowsHookEx
  PID:4184
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn SystemSettingsAdminFlows /tr "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe" /sc minute /mo 1 /F
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1428

C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1704
- C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
  "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe"
  2⤵
  - Executes dropped EXE
  PID:3472
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn SystemSettingsAdminFlows /tr "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe" /sc minute /mo 1 /F
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:1804

C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4416
- C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
  "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe"
  2⤵
  - Executes dropped EXE
  PID:5052
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\SysWOW64\schtasks.exe" /create /tn SystemSettingsAdminFlows /tr "C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe" /sc minute /mo 1 /F
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:4924

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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AboutSettingsHandlers.exe

Path C:\Users\Admin\AppData\Roaming\UIMgrBroker\AboutSettingsHandlers.exe
Size 1.5MB
SHA256 86367ec189cc4c8e3204a34041654b24eb8f4b1857be9bb62e86a975aee4204f
MD5 2982ca256e7ebbe8587f007da4717715
SHA1 79bd1f0e0853a911aecd4c64fe1b795e63549c37
SHA512 90179b265d6d691991d2a163f84a686505d78c06cef8f7258f485338baade36183d766dde97534dee897bf6e79de1d43b3fce58193086748d16bb932acc15cf4
SSDEEP 24576:zaTg0wZ14X27uUL3VM0kd+rkhfMsjgkAj2JE06J5N0Fq:+Tg3ZOcuUL3xAx/8b2S7Z0w
TLSH
T1C17523FA8E706892D5BD463205AF0F6D75F54FF37A14AC4311713D2A2F3A267A920A1C
MD5 SHA1 SHA512 SSDEEP TLSH

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logs.dat

Path C:\Users\Admin\AppData\Roaming\remcos\logs.dat
Size 79B
SHA256 ac4278ea5902f31d938e397083a4b97a1b83acc25ffd505361e83ba4e654c3ab
MD5 f764bb1cac6fe136641bb41c36ba68f1
SHA1 ec5fdccb047608df21053f9485df376f92f56f78
SHA512 abd4332f5684953dda454f39dfbbb5c0fcd5eb605af6e54136e8afb8b0f35bd34f1ee3907f63ec385b4a31573bf2b5a01791326777fd65da42d7a54f9975bb23
TLSH
T16FA01255C720994D041328F1714C30C660021820356715055402CB0C424800175C1211
MD5 SHA1 SHA512 TLSH

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memory/1704-38-0x0000000000DE0000-0x0000000000F69000-memory.dmp

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memory/1704-35-0x0000000000DE0000-0x0000000000F69000-memory.dmp

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memory/1704-36-0x0000000000920000-0x0000000000923000-memory.dmp

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memory/1704-25-0x0000000000920000-0x0000000000923000-memory.dmp

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memory/3092-16-0x00000000009A0000-0x00000000009A3000-memory.dmp

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memory/3092-0-0x0000000000DE0000-0x0000000000F69000-memory.dmp

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memory/3092-17-0x0000000000DE0000-0x0000000000F69000-memory.dmp

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memory/3092-22-0x0000000000DE0000-0x0000000000F69000-memory.dmp

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memory/3092-2-0x0000000001C50000-0x0000000001C51000-memory.dmp

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memory/3092-1-0x00000000009A0000-0x00000000009A3000-memory.dmp

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memory/4184-15-0x00000000000C0000-0x00000000000E0000-memory.dmp

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memory/4184-12-0x00000000000C0000-0x00000000000E0000-memory.dmp

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memory/4184-11-0x00000000000C0000-0x00000000000E0000-memory.dmp

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memory/4184-10-0x0000000000DE0000-0x0000000000F69000-memory.dmp

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memory/4184-3-0x00000000000C0000-0x00000000000E0000-memory.dmp

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memory/4416-55-0x0000000000DE0000-0x0000000000F69000-memory.dmp

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memory/4416-57-0x0000000000DE0000-0x0000000000F69000-memory.dmp

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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