remcos | 215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd

General

Target
215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe
Size 469KB
Sample240511-bhvrmace21
SHA256 215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd
MD5 27bb3968cc18fb0df5b14e6d1b805552
SHA1 8f44161a7c4e45422a5d179fbd1d1a81657d828c
SHA512 c470ab75ae46a7161886b8e334143d373385efeb63afcb6f80317bcc0ed989bd3fbc97e87287a0aed8a4661b72261e1ceb94a2be263f25f00c935bad56bafc5d
SSDEEP 12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSFn9:uiLJbpI7I2WhQqZ7F9
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

remcos nuevos persistence rat

Malware Config

Extracted

Family

remcos

Botnet

Nuevos

C2

nuevosremcs.duckdns.org:9090

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
notepads.exe
copy_folder
data
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
notas
mouse_option
false
mutex
Rmc-WRNU47
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
system32
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

detects Windows exceutables potentially bypassing UAC using eventvwr.exe 1 IoCs

resource	yara_rule
behavioral2/files/0x0009000000023421-6.dat	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
1908	notepads.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\""	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\""	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\""	notepads.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\""	notepads.exe

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

System Information Discovery
T1082

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4018855536-2201274732-320770143-1000_Classes\Local Settings	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1908	notepads.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 2280 wrote to memory of 432	2280	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe	83
PID 2280 wrote to memory of 432	2280	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe	83
PID 2280 wrote to memory of 432	2280	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe	83
PID 432 wrote to memory of 4172	432	WScript.exe	88
PID 432 wrote to memory of 4172	432	WScript.exe	88
PID 432 wrote to memory of 4172	432	WScript.exe	88
PID 4172 wrote to memory of 1908	4172	cmd.exe	90
PID 4172 wrote to memory of 1908	4172	cmd.exe	90
PID 4172 wrote to memory of 1908	4172	cmd.exe	90

C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe
"C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2280
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Suspicious use of WriteProcessMemory
  PID:432
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\data\notepads.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4172
  - - C:\Users\Admin\AppData\Roaming\data\notepads.exe
      C:\Users\Admin\AppData\Roaming\data\notepads.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetWindowsHookEx
      PID:1908

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

logs.dat

Path C:\ProgramData\notas\logs.dat
Size 144B
SHA256 8a92f26fec184a1ba22d5bff37af84e2f05da49363386995297d252b290b6593
MD5 5786ba34986eb9de317b176b6fcad734
SHA1 050537c5578d024f8ea465a000f9298da9c5aa67
SHA512 0e42aa11db27dd971acf0574d87a632e213840d1817186211b89bc0459a212bb5e8d2df584af9495fb50e5ba8134d19d81af05d4addda6c714c60424c23a20b7
MD5 SHA1 SHA512

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install.vbs

Path C:\Users\Admin\AppData\Local\Temp\install.vbs
Size 418B
SHA256 1bf4eaa1b06f079565ca6ea81082736efd1e25d6465c353ad992ba8c38940c3f
MD5 1653e8468b0d0cd87a484261da3a898b
SHA1 ab798bd56e8dfebf82b4feda4e1549778d19848b
SHA512 5df77f64350879e22a6b9f018bdd8fcf90920cc9f4026ed9bf733b5e965214abd8c3643b211b2f814cd2a9e016f0c15762eaee133feef6ed5c37bdd66ff7be2f
MD5 SHA1 SHA512

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notepads.exe

Path C:\Users\Admin\AppData\Roaming\data\notepads.exe
Size 469KB
SHA256 215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd
MD5 27bb3968cc18fb0df5b14e6d1b805552
SHA1 8f44161a7c4e45422a5d179fbd1d1a81657d828c
SHA512 c470ab75ae46a7161886b8e334143d373385efeb63afcb6f80317bcc0ed989bd3fbc97e87287a0aed8a4661b72261e1ceb94a2be263f25f00c935bad56bafc5d
SSDEEP 12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSFn9:uiLJbpI7I2WhQqZ7F9
MD5 SHA1 SHA512 SSDEEP

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Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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