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
behavioral1/files/0x0036000000015c6d-5.dat	INDICATOR_SUSPICIOUS_EXE_UACBypass_EventViewer

Executes dropped EXE 1 IoCs

pid	Process
2552	notepads.exe

Loads dropped DLL 2 IoCs

pid	Process
2672	cmd.exe
2672	cmd.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\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\""	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\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
Set value (str)	\REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\system32 = "\"C:\\Users\\Admin\\AppData\\Roaming\\data\\notepads.exe\""	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe

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

System Information Discovery
T1082

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2552	notepads.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2172 wrote to memory of 2492	2172	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe	28
PID 2172 wrote to memory of 2492	2172	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe	28
PID 2172 wrote to memory of 2492	2172	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe	28
PID 2172 wrote to memory of 2492	2172	215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe	28
PID 2492 wrote to memory of 2672	2492	WScript.exe	29
PID 2492 wrote to memory of 2672	2492	WScript.exe	29
PID 2492 wrote to memory of 2672	2492	WScript.exe	29
PID 2492 wrote to memory of 2672	2492	WScript.exe	29
PID 2672 wrote to memory of 2552	2672	cmd.exe	31
PID 2672 wrote to memory of 2552	2672	cmd.exe	31
PID 2672 wrote to memory of 2552	2672	cmd.exe	31
PID 2672 wrote to memory of 2552	2672	cmd.exe	31

C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe
"C:\Users\Admin\AppData\Local\Temp\215292f9d78604f7d15cae869415f0a0269b7dd43b4986cad6a7d1b0c6cdb7dd.exe"
1⤵
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:2172
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2492
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\data\notepads.exe"
    3⤵
    - Loads dropped DLL
    - Suspicious use of WriteProcessMemory
    PID:2672
  - - 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:2552

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

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

logs.dat

Path C:\ProgramData\notas\logs.dat
Size 144B
SHA256 20d546c390b089c10492d2d0f897d2c7f4524df811befb00fda5ab6baf8849f5
MD5 81f6e26b375b8077152da55569eb0606
SHA1 799a2db4ebc27c3b700e3f5557a183ff3f86fd4b
SHA512 22737f7d86969089686f3533129dad927bd2169bc68c02d8f351b25658bdf7f793fa7fe0390fad5e77e532d577f3f4c006fe0445c855d1b4c71b2252e515c9ab
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 \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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Downloads