remcos | 90f942f51ff947d5b8aa4525284e6748845942cfa06df735718cd171d8ced7b9

General

Target

71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480.exe
Size

92KB
MD5

d1d18f29a568419387624392f19246ca
SHA1

7d4163da511178566bdf49bf413b50096417bb98
SHA256

71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480
SHA512

402104d53273f9471af148e513a47a4c2bc4b4e87d658eab5e96ce226c948dea102a12d49725a77b56bfbc95be5eec729f4694d7ff5ea49a50e6bc5b47e8d369
SSDEEP

1536:YhhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6kr9:+hzYTGWVvJ8f2v1TbPzuMsIFSHNThy+R

Score

10^/10

remcos host discovery persistence rat

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

192.168.18:2404

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
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
remcos
keylog_path
%AppData%
mouse_option
false
mutex
remcos_chsymxgtedierig
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
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

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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480.exe

Executes dropped EXE 1 IoCs

pid	Process
1492	remcos.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\remcos\\remcos.exe\""	71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480.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 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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
1844	PING.EXE

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
1844	PING.EXE

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
1492	remcos.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
1492	remcos.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 1764 wrote to memory of 4940	1764	71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480.exe	82
PID 1764 wrote to memory of 4940	1764	71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480.exe	82
PID 1764 wrote to memory of 4940	1764	71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480.exe	82
PID 4940 wrote to memory of 1844	4940	cmd.exe	84
PID 4940 wrote to memory of 1844	4940	cmd.exe	84
PID 4940 wrote to memory of 1844	4940	cmd.exe	84
PID 4940 wrote to memory of 1492	4940	cmd.exe	85
PID 4940 wrote to memory of 1492	4940	cmd.exe	85
PID 4940 wrote to memory of 1492	4940	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480.exe
"C:\Users\Admin\AppData\Local\Temp\71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1764
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4940
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:1844
- - C:\Users\Admin\AppData\Roaming\remcos\remcos.exe
    "C:\Users\Admin\AppData\Roaming\remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    - Adds Run key to start application
    - System Location Discovery: System Language Discovery
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    PID:1492

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

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.bat

Filesize
99B

MD5
76c1687d97dfdbcea62ef1490bec5001

SHA1
5f4d1aeafa7d840cde67b76f97416dd68efd1bed

SHA256
79f04ea049979ffd2232c459fdd57fae97a5255aea9b4a2c7dce7ead856f37a4

SHA512
da250f0628632a644f159d818a82a8b9cca8224e46843bddbe0f6f9c32a2d04f7736a620af49ab6d77616317ca7d68285e60043965fe86c03d940835bd30a925

Download Submit
C:\Users\Admin\AppData\Roaming\remcos\remcos.exe

Filesize
92KB

MD5
d1d18f29a568419387624392f19246ca

SHA1
7d4163da511178566bdf49bf413b50096417bb98

SHA256
71220a7a9e387222473fc47682fb621e542210d5779e1d2df98c115d19a44480

SHA512
402104d53273f9471af148e513a47a4c2bc4b4e87d658eab5e96ce226c948dea102a12d49725a77b56bfbc95be5eec729f4694d7ff5ea49a50e6bc5b47e8d369

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads