remcos | 27174380e5703a07a74e91159a09d06a3687306cd44a5384d2fa8f5bd5394363

Analysis

max time kernel
150s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
12-11-2024 14:09

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General

Target

pizon.exe
Size

469KB
MD5

dda2037eab744fb5af4303f05b0909d1
SHA1

1143f96719184882d949f0637fed50a2c9183004
SHA256

27174380e5703a07a74e91159a09d06a3687306cd44a5384d2fa8f5bd5394363
SHA512

bc5a868c6fba27160fadc1ab4d3c94b3fdb823a6fb49e390be21e2bc391079597704074a983318c91be4f39169a9d6a1697cc7c3864be4190ed190ded86f1b34
SSDEEP

12288:Omnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSun9:2iLJbpI7I2WhQqZ7u9

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

camera-ms.gl.at.ply.gg:50534

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
system.exe
copy_folder
Remcos
delete_file
true
hide_file
true
hide_keylog_file
false
install_flag
true
install_path
%WinDir%\System32
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-9KF15T
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

UAC bypass 3 TTPs 3 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

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-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	pizon.exe

Deletes itself 1 IoCs

pid	Process
236	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
1356	system.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\system.exe\""	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\system.exe\""	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\system.exe\""	pizon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\system.exe\""	pizon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\system.exe\""	system.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\system.exe\""	system.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Remcos\system.exe	pizon.exe
File opened for modification	C:\Windows\SysWOW64\Remcos\system.exe	pizon.exe
File opened for modification	C:\Windows\SysWOW64\Remcos	pizon.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1356 set thread context of 4900	1356	system.exe	95
PID 4900 set thread context of 2832	4900	iexplore.exe	99

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 11 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	system.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	pizon.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000_Classes\Local Settings	pizon.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
2528	reg.exe
4756	reg.exe
3292	reg.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
1356	system.exe
4900	iexplore.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 4244 wrote to memory of 436	4244	pizon.exe	84
PID 4244 wrote to memory of 436	4244	pizon.exe	84
PID 4244 wrote to memory of 436	4244	pizon.exe	84
PID 436 wrote to memory of 2528	436	cmd.exe	86
PID 436 wrote to memory of 2528	436	cmd.exe	86
PID 436 wrote to memory of 2528	436	cmd.exe	86
PID 4244 wrote to memory of 236	4244	pizon.exe	87
PID 4244 wrote to memory of 236	4244	pizon.exe	87
PID 4244 wrote to memory of 236	4244	pizon.exe	87
PID 236 wrote to memory of 2320	236	WScript.exe	90
PID 236 wrote to memory of 2320	236	WScript.exe	90
PID 236 wrote to memory of 2320	236	WScript.exe	90
PID 2320 wrote to memory of 1356	2320	cmd.exe	92
PID 2320 wrote to memory of 1356	2320	cmd.exe	92
PID 2320 wrote to memory of 1356	2320	cmd.exe	92
PID 1356 wrote to memory of 2992	1356	system.exe	93
PID 1356 wrote to memory of 2992	1356	system.exe	93
PID 1356 wrote to memory of 2992	1356	system.exe	93
PID 1356 wrote to memory of 4900	1356	system.exe	95
PID 1356 wrote to memory of 4900	1356	system.exe	95
PID 1356 wrote to memory of 4900	1356	system.exe	95
PID 1356 wrote to memory of 4900	1356	system.exe	95
PID 4900 wrote to memory of 4384	4900	iexplore.exe	97
PID 4900 wrote to memory of 4384	4900	iexplore.exe	97
PID 4900 wrote to memory of 4384	4900	iexplore.exe	97
PID 2992 wrote to memory of 4756	2992	cmd.exe	96
PID 2992 wrote to memory of 4756	2992	cmd.exe	96
PID 2992 wrote to memory of 4756	2992	cmd.exe	96
PID 4900 wrote to memory of 2832	4900	iexplore.exe	99
PID 4900 wrote to memory of 2832	4900	iexplore.exe	99
PID 4900 wrote to memory of 2832	4900	iexplore.exe	99
PID 4900 wrote to memory of 2832	4900	iexplore.exe	99
PID 4384 wrote to memory of 3292	4384	cmd.exe	100
PID 4384 wrote to memory of 3292	4384	cmd.exe	100
PID 4384 wrote to memory of 3292	4384	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\pizon.exe
"C:\Users\Admin\AppData\Local\Temp\pizon.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4244
- C:\Windows\SysWOW64\cmd.exe
  /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:436
- - C:\Windows\SysWOW64\reg.exe
    C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:2528
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:236
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\Remcos\system.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2320
  - - C:\Windows\SysWOW64\Remcos\system.exe
      C:\Windows\SysWOW64\Remcos\system.exe
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:1356
    - - C:\Windows\SysWOW64\cmd.exe
        
        /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2992
      - C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        6⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:4756
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        Adds Run key to start application
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:4900
      - C:\Windows\SysWOW64\cmd.exe
        
        /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        6⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:4384
        
        C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        7⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:3292
      - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        6⤵
        
        PID:2832

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
518B

MD5
9cf180df53b3d7685f48aafdbe9faec7

SHA1
77552c3eda21047097e2bd405cf60b295b891c9b

SHA256
bcf828c8d659dce13714c298cf6c7523baa3fc2ba367d2c1fd5980dd8971a5a8

SHA512
20e17aa0a2222e6dabd83221e234e28aaee06dae370fba08f7cdc1b9e1afabdb3b496a59a80c4e753803eb67ad106cf5cc1cbdbb153804dc65ca7fc721bef3fa

Download Submit
C:\Windows\SysWOW64\Remcos\system.exe

Filesize
469KB

MD5
dda2037eab744fb5af4303f05b0909d1

SHA1
1143f96719184882d949f0637fed50a2c9183004

SHA256
27174380e5703a07a74e91159a09d06a3687306cd44a5384d2fa8f5bd5394363

SHA512
bc5a868c6fba27160fadc1ab4d3c94b3fdb823a6fb49e390be21e2bc391079597704074a983318c91be4f39169a9d6a1697cc7c3864be4190ed190ded86f1b34

Download Submit
memory/2832-14-0x0000000000EA0000-0x0000000000F1F000-memory.dmp

Filesize
508KB

Download
memory/2832-15-0x0000000000EA0000-0x0000000000F1F000-memory.dmp

Filesize
508KB

Download
memory/4900-10-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-9-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-11-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-16-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-17-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-18-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-19-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-22-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-23-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-24-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-25-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-26-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-27-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-28-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-29-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-30-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-31-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-32-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-33-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-34-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-35-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-36-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-37-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-38-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-39-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-40-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-41-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-42-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-43-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-44-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-45-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-46-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-47-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-48-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-49-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-50-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-51-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-52-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-53-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-54-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-55-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-56-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-57-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-58-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-59-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-60-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-61-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-62-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-63-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-64-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-65-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-66-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-67-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-68-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-69-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-70-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-71-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-72-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download
memory/4900-73-0x0000000000950000-0x00000000009CF000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads