remcos | 9c843456235244f095b5e021ca82e4805cd94ac732ae8b7a35a021f18117637c

General

Target

04db1598bdd84ac10adb5ebef639f628.exe
Size

3.1MB
MD5

04db1598bdd84ac10adb5ebef639f628
SHA1

16d9a3c85f2e56e13e22a4417f9215d7cad8d2a7
SHA256

9c843456235244f095b5e021ca82e4805cd94ac732ae8b7a35a021f18117637c
SHA512

b20c0840aebf19dd7d0f3bd07b7794122db99fd4e6d78ff5ac0d2e7a08be2f1047398aef36edeeda79062946433ec793eda84c6cf8dae8937ac5762be5760385
SSDEEP

49152:lWkFpCF7XzYXDESpbRSNH8Sc7e6TKJGnVr1V2V/VyqhPzS+tYTEy:lVFpG7XzFFc7e9JGnVx+/VdPzSdR

Score

10^/10

remcos fresa discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

FRESA

C2

segurosbolivar24.con-ip.com:2006

Attributes

audio_folder
MicRecords
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
registros.dat
keylog_flag
false
keylog_folder
regis
mouse_option
false
mutex
mnhdgtdhjaukdjnsbhdioz-Z6YHMX
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Capturas de pantalla
screenshot_path
%AppData%
screenshot_time
10
startup_value
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Checks computer location settings 2 TTPs 1 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-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	04db1598bdd84ac10adb5ebef639f628.exe

Deletes itself 1 IoCs

pid	Process
3412	WScript.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\FireDesignerEditor = "C:\\Users\\Admin\\Music\\FireDesignerUpdater\\FireVideo.exe"	04db1598bdd84ac10adb5ebef639f628.exe

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 3 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	04db1598bdd84ac10adb5ebef639f628.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	04db1598bdd84ac10adb5ebef639f628.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000_Classes\Local Settings	04db1598bdd84ac10adb5ebef639f628.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2392	04db1598bdd84ac10adb5ebef639f628.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3116 wrote to memory of 2392	3116	04db1598bdd84ac10adb5ebef639f628.exe	85
PID 3116 wrote to memory of 2392	3116	04db1598bdd84ac10adb5ebef639f628.exe	85
PID 3116 wrote to memory of 2392	3116	04db1598bdd84ac10adb5ebef639f628.exe	85
PID 3116 wrote to memory of 2392	3116	04db1598bdd84ac10adb5ebef639f628.exe	85
PID 3116 wrote to memory of 2392	3116	04db1598bdd84ac10adb5ebef639f628.exe	85
PID 2392 wrote to memory of 3412	2392	04db1598bdd84ac10adb5ebef639f628.exe	87
PID 2392 wrote to memory of 3412	2392	04db1598bdd84ac10adb5ebef639f628.exe	87
PID 2392 wrote to memory of 3412	2392	04db1598bdd84ac10adb5ebef639f628.exe	87

C:\Users\Admin\AppData\Local\Temp\04db1598bdd84ac10adb5ebef639f628.exe
"C:\Users\Admin\AppData\Local\Temp\04db1598bdd84ac10adb5ebef639f628.exe"
1⤵
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3116
- C:\Users\Admin\AppData\Local\Temp\04db1598bdd84ac10adb5ebef639f628.exe
  "C:\Users\Admin\AppData\Local\Temp\04db1598bdd84ac10adb5ebef639f628.exe"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2392
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\nizcnvjhaqagsjxumsftflclysychnk.vbs"
    3⤵
    - Deletes itself
    - System Location Discovery: System Language Discovery
    PID:3412

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

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\nizcnvjhaqagsjxumsftflclysychnk.vbs

Filesize
600B

MD5
36f370aed01c538ad19605b87790a578

SHA1
5da2f5e32ab5b1f90e07f581516b2c8f91719d25

SHA256
83e4fae39e5afe5a7b41099e49c6e4c4808a0832297d112de449b8cc53ad2b8d

SHA512
60be56f34d00396039e27ee9ae711d629f57392d45e9863967ba860d8067d093007d70847a8f7acd844d51cfe9a8c39baf1be3f3b8fbdde70dce58caeb66ee3c

Download Submit
memory/2392-14-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-36-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-17-0x0000000000400000-0x000000000075E000-memory.dmp

Filesize
3.4MB

Download
memory/2392-19-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-18-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-8-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-39-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-21-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-33-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-12-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-13-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-31-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-30-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-29-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-22-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/2392-20-0x0000000000760000-0x00000000007E2000-memory.dmp

Filesize
520KB

Download
memory/3116-11-0x0000000000400000-0x000000000075E000-memory.dmp

Filesize
3.4MB

Download
memory/3116-7-0x0000000000400000-0x000000000075E000-memory.dmp

Filesize
3.4MB

Download
memory/3116-26-0x0000000000535000-0x000000000054D000-memory.dmp

Filesize
96KB

Download
memory/3116-3-0x0000000000400000-0x000000000075E000-memory.dmp

Filesize
3.4MB

Download
memory/3116-2-0x0000000000535000-0x000000000054D000-memory.dmp

Filesize
96KB

Download
memory/3116-0-0x0000000000400000-0x000000000075E000-memory.dmp

Filesize
3.4MB

Download
memory/3116-9-0x0000000000400000-0x000000000075E000-memory.dmp

Filesize
3.4MB

Download
memory/3116-1-0x0000000000400000-0x000000000075E000-memory.dmp

Filesize
3.4MB

Download
memory/3116-6-0x0000000000400000-0x000000000075E000-memory.dmp

Filesize
3.4MB

Download
memory/3116-5-0x0000000000400000-0x000000000075E000-memory.dmp

Filesize
3.4MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads