remcos | eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34

General

Target

eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
Size

368KB
MD5

3b6f01867a856980aebf4bfefd580b05
SHA1

aabfde9fa7910ff59d6a2fd4de8f2280e4554695
SHA256

eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34
SHA512

df27c242f07c2ba0c8b2f526a189b3ba9fea78c75aa63da57f982c5d6a55ba73ba2e934f9f0ccbff68c9cb2795810f2d5f6b9f4bd6b87da4007f592512df77f7
SSDEEP

3072:tRFhJsebNVlW1NWgxLJOp6iJRejPoQKvHIbuduaqyuhjDxSIVbOfprMIYsMMgC6U:tRF3VoweHW0u8TDB4ty3huYu

Score

10^/10

remcos talentino discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

2.4.3 Pro

Botnet

Talentino

C2

185.140.53.140:2404

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
true
hide_file
false
hide_keylog_file
true
install_flag
true
install_path
%AppData%
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-KG5D4I
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Executes dropped EXE 2 IoCs

pid	Process
2548	nas0.exe
980	nas0.exe

Loads dropped DLL 3 IoCs

pid	Process
2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2548	nas0.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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\RunOnce\men0 = "wscript \"C:\\Users\\Admin\\AppData\\Local\\Temp\\nas0.vbs\""	nas0.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2552 set thread context of 2176	2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe	30
PID 2548 set thread context of 980	2548	nas0.exe	32

Drops file in Windows directory 4 IoCs

description	ioc	Process
File opened for modification	C:\Windows\win.ini	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
File opened for modification	C:\Windows\win.ini	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
File opened for modification	C:\Windows\win.ini	nas0.exe
File opened for modification	C:\Windows\win.ini	nas0.exe

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.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nas0.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	nas0.exe

Suspicious use of FindShellTrayWindow 8 IoCs

pid	Process
2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2548	nas0.exe
2548	nas0.exe
980	nas0.exe
980	nas0.exe

Suspicious use of SendNotifyMessage 8 IoCs

pid	Process
2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2548	nas0.exe
2548	nas0.exe
980	nas0.exe
980	nas0.exe

Suspicious use of SetWindowsHookEx 4 IoCs

pid	Process
2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
2548	nas0.exe
980	nas0.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2552 wrote to memory of 2176	2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe	30
PID 2552 wrote to memory of 2176	2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe	30
PID 2552 wrote to memory of 2176	2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe	30
PID 2552 wrote to memory of 2176	2552	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe	30
PID 2176 wrote to memory of 2548	2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe	31
PID 2176 wrote to memory of 2548	2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe	31
PID 2176 wrote to memory of 2548	2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe	31
PID 2176 wrote to memory of 2548	2176	eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe	31
PID 2548 wrote to memory of 980	2548	nas0.exe	32
PID 2548 wrote to memory of 980	2548	nas0.exe	32
PID 2548 wrote to memory of 980	2548	nas0.exe	32
PID 2548 wrote to memory of 980	2548	nas0.exe	32

C:\Users\Admin\AppData\Local\Temp\eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
"C:\Users\Admin\AppData\Local\Temp\eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe"
1⤵
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2552
- C:\Users\Admin\AppData\Local\Temp\eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe
  "C:\Users\Admin\AppData\Local\Temp\eb5bcadcc3f76a63527061c741dbc47b3a538cef9a46b8d0feb502eae64b6f34.exe"
  2⤵
  - Loads dropped DLL
  - Drops file in Windows directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2176
- - C:\Users\Admin\AppData\Local\Temp\nas0.exe
    "C:\Users\Admin\AppData\Local\Temp\nas0.exe"
    3⤵
    - Executes dropped EXE
    - Loads dropped DLL
    - Adds Run key to start application
    - Suspicious use of SetThreadContext
    - Drops file in Windows directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:2548
  - - C:\Users\Admin\AppData\Local\Temp\nas0.exe
      "C:\Users\Admin\AppData\Local\Temp\nas0.exe"
      4⤵
      Executes dropped EXE
      Drops file in Windows directory
      System Location Discovery: System Language Discovery
      Suspicious use of FindShellTrayWindow
      Suspicious use of SendNotifyMessage
      Suspicious use of SetWindowsHookEx
      PID:980

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 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:\Windows\win.ini

Filesize
509B

MD5
d2a2412bddba16d60ec63bd9550d933f

SHA1
deb3d3bdc9055f0b4909b31d3048446848fae0e1

SHA256
79ff2254e38192be1626d05bec6c82e10c85e1cf91df7440c4c443380a1e877a

SHA512
8fecada107f72e59e43a689eeb8e2e18fa6134d0941c122025ed5bd00e5eab8114d7125bd289505be75641385a0c3f112d402c693f142c3ddc870d5fa8116e31

Download Submit
\Users\Admin\AppData\Local\Temp\nas0.exe

Filesize
368KB

MD5
55d309908ea8c683ae94e9c2a9c03df3

SHA1
ff990b1d1c5c1cb679dcc3d7a4217022def7c7a1

SHA256
fda4908eb13f6539b8c4eb000792de7f2cc6069c1edd7d68fdd39d41587792ad

SHA512
a45c32791980ead77f8cf1dce5a489d1f74309183eafb59305e050e2f9fb0ecd0f7ff82dae9370790348354ae3fc3ae6f4d7f4cd28633183a74908f5262d3634

Download Submit
memory/980-36-0x00000000002C0000-0x00000000002C5000-memory.dmp

Filesize
20KB

Download
memory/980-34-0x0000000000400000-0x000000000045F000-memory.dmp

Filesize
380KB

Download
memory/2176-14-0x00000000777F0000-0x0000000077999000-memory.dmp

Filesize
1.7MB

Download
memory/2176-21-0x00000000004A0000-0x00000000004A5000-memory.dmp

Filesize
20KB

Download
memory/2552-3-0x0000000000490000-0x0000000000495000-memory.dmp

Filesize
20KB

Download
memory/2552-4-0x00000000777F1000-0x00000000778F2000-memory.dmp

Filesize
1.0MB

Download
memory/2552-5-0x00000000777F0000-0x0000000077999000-memory.dmp

Filesize
1.7MB

Download
memory/2552-12-0x00000000779E0000-0x0000000077AB6000-memory.dmp

Filesize
856KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads