remcos | ecfa5c1f460a2d96cfe17c13b7b77f1755ebf4a96d114a1d8814d85c78483ade

Resubmissions

07-11-2024 03:54

241107-egqm3atqbt 10

28-10-2024 20:57

241028-zrzc6sxemk 10

Analysis

max time kernel
149s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-11-2024 03:54

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General

Target

luna.exe
Size

469KB
MD5

e60cc75120901abeb61e9fb76cbf96ec
SHA1

228bb950e891943002c0c7f604f3c3feff6d135b
SHA256

ecfa5c1f460a2d96cfe17c13b7b77f1755ebf4a96d114a1d8814d85c78483ade
SHA512

6de5b0985238ba664985f5b0371765ecf8e6a31bafd5dd3688fefeb0c93cdfe011adc4aefa2258afacb6278e5f83199c96c1247671adc3e319ba45150c787b41
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSdPn9:uiLJbpI7I2WhQqZ7dP9

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

it-double.gl.at.ply.gg:37981

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Security.exe
copy_folder
system64
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-Z7BY2N
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Windows Recovery
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

Adds policy Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	luna.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Windows Recovery = "\"C:\\Windows\\SysWOW64\\system64\\Security.exe\""	luna.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Security.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Windows Recovery = "\"C:\\Windows\\SysWOW64\\system64\\Security.exe\""	Security.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Windows Recovery = "\"C:\\Windows\\SysWOW64\\system64\\Security.exe\""	iexplore.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-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	WScript.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\Control Panel\International\Geo\Nation	luna.exe

Deletes itself 1 IoCs

pid	Process
2136	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
2892	Security.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-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Recovery = "\"C:\\Windows\\SysWOW64\\system64\\Security.exe\""	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Recovery = "\"C:\\Windows\\SysWOW64\\system64\\Security.exe\""	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Recovery = "\"C:\\Windows\\SysWOW64\\system64\\Security.exe\""	luna.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Recovery = "\"C:\\Windows\\SysWOW64\\system64\\Security.exe\""	luna.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Windows Recovery = "\"C:\\Windows\\SysWOW64\\system64\\Security.exe\""	Security.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Windows Recovery = "\"C:\\Windows\\SysWOW64\\system64\\Security.exe\""	Security.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\system64\Security.exe	luna.exe
File opened for modification	C:\Windows\SysWOW64\system64\Security.exe	luna.exe
File opened for modification	C:\Windows\SysWOW64\system64	luna.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2892 set thread context of 4756	2892	Security.exe	94
PID 4756 set thread context of 2160	4756	iexplore.exe	97

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	cmd.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	luna.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.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	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Security.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-2878641211-696417878-3864914810-1000_Classes\Local Settings	luna.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
1220	reg.exe
4656	reg.exe
2808	reg.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2892	Security.exe
4756	iexplore.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 3232 wrote to memory of 4020	3232	luna.exe	83
PID 3232 wrote to memory of 4020	3232	luna.exe	83
PID 3232 wrote to memory of 4020	3232	luna.exe	83
PID 4020 wrote to memory of 4656	4020	cmd.exe	85
PID 4020 wrote to memory of 4656	4020	cmd.exe	85
PID 4020 wrote to memory of 4656	4020	cmd.exe	85
PID 3232 wrote to memory of 2136	3232	luna.exe	86
PID 3232 wrote to memory of 2136	3232	luna.exe	86
PID 3232 wrote to memory of 2136	3232	luna.exe	86
PID 2136 wrote to memory of 3724	2136	WScript.exe	90
PID 2136 wrote to memory of 3724	2136	WScript.exe	90
PID 2136 wrote to memory of 3724	2136	WScript.exe	90
PID 3724 wrote to memory of 2892	3724	cmd.exe	92
PID 3724 wrote to memory of 2892	3724	cmd.exe	92
PID 3724 wrote to memory of 2892	3724	cmd.exe	92
PID 2892 wrote to memory of 5076	2892	Security.exe	93
PID 2892 wrote to memory of 5076	2892	Security.exe	93
PID 2892 wrote to memory of 5076	2892	Security.exe	93
PID 2892 wrote to memory of 4756	2892	Security.exe	94
PID 2892 wrote to memory of 4756	2892	Security.exe	94
PID 2892 wrote to memory of 4756	2892	Security.exe	94
PID 2892 wrote to memory of 4756	2892	Security.exe	94
PID 4756 wrote to memory of 1176	4756	iexplore.exe	96
PID 4756 wrote to memory of 1176	4756	iexplore.exe	96
PID 4756 wrote to memory of 1176	4756	iexplore.exe	96
PID 4756 wrote to memory of 2160	4756	iexplore.exe	97
PID 4756 wrote to memory of 2160	4756	iexplore.exe	97
PID 4756 wrote to memory of 2160	4756	iexplore.exe	97
PID 4756 wrote to memory of 2160	4756	iexplore.exe	97
PID 5076 wrote to memory of 2808	5076	cmd.exe	99
PID 5076 wrote to memory of 2808	5076	cmd.exe	99
PID 5076 wrote to memory of 2808	5076	cmd.exe	99
PID 1176 wrote to memory of 1220	1176	cmd.exe	100
PID 1176 wrote to memory of 1220	1176	cmd.exe	100
PID 1176 wrote to memory of 1220	1176	cmd.exe	100

C:\Users\Admin\AppData\Local\Temp\luna.exe
"C:\Users\Admin\AppData\Local\Temp\luna.exe"
1⤵
- Adds policy Run key to start application
- 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:3232
- 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:4020
- - 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:4656
- 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:2136
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\system64\Security.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:3724
  - - C:\Windows\SysWOW64\system64\Security.exe
      C:\Windows\SysWOW64\system64\Security.exe
      4⤵
      Adds policy Run key to start application
      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:2892
    - - 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:5076
      - 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:2808
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        Adds policy Run key to start application
        Adds Run key to start application
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:4756
      - 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:1176
        
        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:1220
      - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        6⤵
        
        PID:2160

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
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
524B

MD5
97627fc71d5e90498616baf1e6fd73f8

SHA1
b75fdc55147ede7ba9eb9904d1b045246f5ba156

SHA256
e1d0bd471d22160ca18c4f4e3fc727a4c66df66f9afb84816ba91e8fe201522f

SHA512
8e41fd1ab5534213fe0921688d4adc72a2937765cfd7eb7bcb1448e5cc599cb705cba4415f2022d70f8b61d66b819e460cf7ba43a439a072a889f013c00ea948

Download Submit
C:\Windows\SysWOW64\system64\Security.exe

Filesize
469KB

MD5
e60cc75120901abeb61e9fb76cbf96ec

SHA1
228bb950e891943002c0c7f604f3c3feff6d135b

SHA256
ecfa5c1f460a2d96cfe17c13b7b77f1755ebf4a96d114a1d8814d85c78483ade

SHA512
6de5b0985238ba664985f5b0371765ecf8e6a31bafd5dd3688fefeb0c93cdfe011adc4aefa2258afacb6278e5f83199c96c1247671adc3e319ba45150c787b41

Download Submit
memory/2160-14-0x0000000001260000-0x00000000012DF000-memory.dmp

Filesize
508KB

Download
memory/2160-15-0x0000000001260000-0x00000000012DF000-memory.dmp

Filesize
508KB

Download
memory/4756-19-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-20-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-10-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-16-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-17-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-18-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-9-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-11-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-21-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-22-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-23-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-24-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-25-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-26-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-27-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download
memory/4756-28-0x00000000013A0000-0x000000000141F000-memory.dmp

Filesize
508KB

Download

Resubmissions

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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