remcos | 57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082ae

General

Target

57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe
Size

469KB
MD5

489ba8cc178a4c67825a20800a761f90
SHA1

7945f460895062c2e90cc871fb92a84e2f43dedd
SHA256

57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082ae
SHA512

bb366830d8e1cc38530991a794fc43aecd58d1cc5448a9a7727a70f9ca47eb9dba185b6ca12755c6cada5dab46b4890c3deee2baff8378de04eee67fe349b467
SSDEEP

12288:Omnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS1n9:2iLJbpI7I2WhQqZ719

Score

10^/10

remcos windowsupdater discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

WindowsUpdater

C2

204.10.194.175:1337

204.10.194.175:4444

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
WindowsUpdater.exe
copy_folder
Windows
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-1O3BBM
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
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 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-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe
Key value queried	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\Control Panel\International\Geo\Nation	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3240	WindowsUpdater.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\Remcos = "\"C:\\ProgramData\\Windows\\WindowsUpdater.exe\""	57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Windows\\WindowsUpdater.exe\""	WindowsUpdater.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Windows\\WindowsUpdater.exe\""	WindowsUpdater.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Windows\\WindowsUpdater.exe\""	57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.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	57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WindowsUpdater.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-3227495264-2217614367-4027411560-1000_Classes\Local Settings	57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe

Suspicious use of WriteProcessMemory 9 IoCs

description	pid	Process	procid_target
PID 3164 wrote to memory of 3572	3164	57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe	82
PID 3164 wrote to memory of 3572	3164	57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe	82
PID 3164 wrote to memory of 3572	3164	57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe	82
PID 3572 wrote to memory of 4852	3572	WScript.exe	83
PID 3572 wrote to memory of 4852	3572	WScript.exe	83
PID 3572 wrote to memory of 4852	3572	WScript.exe	83
PID 4852 wrote to memory of 3240	4852	cmd.exe	85
PID 4852 wrote to memory of 3240	4852	cmd.exe	85
PID 4852 wrote to memory of 3240	4852	cmd.exe	85

C:\Users\Admin\AppData\Local\Temp\57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe
"C:\Users\Admin\AppData\Local\Temp\57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082aeN.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3164
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3572
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Windows\WindowsUpdater.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4852
  - - C:\ProgramData\Windows\WindowsUpdater.exe
      C:\ProgramData\Windows\WindowsUpdater.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      PID:3240

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

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Downloads

C:\ProgramData\Windows\WindowsUpdater.exe

Filesize
469KB

MD5
489ba8cc178a4c67825a20800a761f90

SHA1
7945f460895062c2e90cc871fb92a84e2f43dedd

SHA256
57957975ce015de2c017af1ad179f1181ac4ee2ddbf8298a5568731ab17082ae

SHA512
bb366830d8e1cc38530991a794fc43aecd58d1cc5448a9a7727a70f9ca47eb9dba185b6ca12755c6cada5dab46b4890c3deee2baff8378de04eee67fe349b467

Download Submit
C:\Users\Admin\AppData\Local\Temp\install.vbs

Filesize
404B

MD5
2f98722cc4943d7a5def5d6ef309550d

SHA1
21a997086c17abda040935661378ec961a57a3fd

SHA256
909ff54b9b8fae48e63c195919dda475c7bb8c67adc0701fb4b9fbec782c580a

SHA512
161f94dfafc0511a7cad3bad98385eab04e8642da59bb88788233426fd1edd4966a72cf37dac54b902e5a09d7a7c7009c88a03b40dd843827578859ac3680c6f

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads