remcos | 41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532

Analysis

max time kernel
71s
max time network
72s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
17-09-2024 22:02

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Reason

Machine shutdown

Report Analysis Logs

General

Target

41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe
Size

469KB
MD5

07b3653e412ef63f2fccef7b404197e8
SHA1

a5b8e29f8b6bbf1e10ab049083b0f214e958edfe
SHA256

41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532
SHA512

dc088419aa3c9fb47d0ed7f318f44d51f84e82525c215ebd66ffc9c68b30410b02c38af4363e4a75838124c57e45f2c7fcad222def30a688d21f90d053696a97
SSDEEP

12288:umnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSwn9:WiLJbpI7I2WhQqZ7w9

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

accessories-retrieve.gl.at.ply.gg:9999

accessories-retrieve.gl.at.ply.gg:13970

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.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-GWSYNB
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

UAC bypass 3 TTPs 2 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

Adds policy Run key to start application 2 TTPs 4 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	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\remcos.exe\""	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\remcos.exe\""	remcos.exe

Deletes itself 1 IoCs

pid	Process
2312	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
2668	remcos.exe

Loads dropped DLL 2 IoCs

pid	Process
2620	cmd.exe
2620	cmd.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\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\remcos.exe\""	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\remcos.exe\""	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Windows\\SysWOW64\\Remcos\\remcos.exe\""	remcos.exe

Drops file in System32 directory 3 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Remcos\remcos.exe	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe
File opened for modification	C:\Windows\SysWOW64\Remcos\remcos.exe	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe
File opened for modification	C:\Windows\SysWOW64\Remcos	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2668 set thread context of 2352	2668	remcos.exe	42
PID 2668 set thread context of 1724	2668	remcos.exe	45

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 8 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	remcos.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	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.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	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

T1112

pid	Process
2488	reg.exe
2888	reg.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2668	remcos.exe
2668	remcos.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeShutdownPrivilege	2668	remcos.exe

Suspicious use of FindShellTrayWindow 1 IoCs

pid	Process
2668	remcos.exe

Suspicious use of SendNotifyMessage 1 IoCs

pid	Process
2668	remcos.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 3012 wrote to memory of 1672	3012	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe	31
PID 3012 wrote to memory of 1672	3012	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe	31
PID 3012 wrote to memory of 1672	3012	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe	31
PID 3012 wrote to memory of 1672	3012	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe	31
PID 3012 wrote to memory of 2312	3012	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe	33
PID 3012 wrote to memory of 2312	3012	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe	33
PID 3012 wrote to memory of 2312	3012	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe	33
PID 3012 wrote to memory of 2312	3012	41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe	33
PID 1672 wrote to memory of 2488	1672	cmd.exe	34
PID 1672 wrote to memory of 2488	1672	cmd.exe	34
PID 1672 wrote to memory of 2488	1672	cmd.exe	34
PID 1672 wrote to memory of 2488	1672	cmd.exe	34
PID 2312 wrote to memory of 2620	2312	WScript.exe	35
PID 2312 wrote to memory of 2620	2312	WScript.exe	35
PID 2312 wrote to memory of 2620	2312	WScript.exe	35
PID 2312 wrote to memory of 2620	2312	WScript.exe	35
PID 2620 wrote to memory of 2668	2620	cmd.exe	37
PID 2620 wrote to memory of 2668	2620	cmd.exe	37
PID 2620 wrote to memory of 2668	2620	cmd.exe	37
PID 2620 wrote to memory of 2668	2620	cmd.exe	37
PID 2668 wrote to memory of 2768	2668	remcos.exe	38
PID 2668 wrote to memory of 2768	2668	remcos.exe	38
PID 2668 wrote to memory of 2768	2668	remcos.exe	38
PID 2668 wrote to memory of 2768	2668	remcos.exe	38
PID 2768 wrote to memory of 2888	2768	cmd.exe	41
PID 2768 wrote to memory of 2888	2768	cmd.exe	41
PID 2768 wrote to memory of 2888	2768	cmd.exe	41
PID 2768 wrote to memory of 2888	2768	cmd.exe	41
PID 2668 wrote to memory of 2352	2668	remcos.exe	42
PID 2668 wrote to memory of 2352	2668	remcos.exe	42
PID 2668 wrote to memory of 2352	2668	remcos.exe	42
PID 2668 wrote to memory of 2352	2668	remcos.exe	42
PID 2668 wrote to memory of 2352	2668	remcos.exe	42
PID 2668 wrote to memory of 1724	2668	remcos.exe	45
PID 2668 wrote to memory of 1724	2668	remcos.exe	45
PID 2668 wrote to memory of 1724	2668	remcos.exe	45
PID 2668 wrote to memory of 1724	2668	remcos.exe	45
PID 2668 wrote to memory of 1724	2668	remcos.exe	45

C:\Users\Admin\AppData\Local\Temp\41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe
"C:\Users\Admin\AppData\Local\Temp\41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3012
- 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:1672
- - 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:2488
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2312
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\Remcos\remcos.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2620
  - - C:\Windows\SysWOW64\Remcos\remcos.exe
      C:\Windows\SysWOW64\Remcos\remcos.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 AdjustPrivilegeToken
      Suspicious use of FindShellTrayWindow
      Suspicious use of SendNotifyMessage
      Suspicious use of WriteProcessMemory
      PID:2668
    - - 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:2768
      - 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:2888
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        
        PID:2352
    - - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        5⤵
        
        PID:1724

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x0
1⤵
PID:624

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x1
1⤵
PID:1160

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

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
636B

MD5
631d2482ef3bfe3a5340622f10095663

SHA1
a711a6ad73f34965349527e0c74b1295d7b45b64

SHA256
461eefae4b184bcf1d944bda41782f35c81cf2b939d54daf6476021daf98aff9

SHA512
36ae9697e847e9191e3087849fb2077189074374ff8a0985b7b9659b32e5dce79d71b094e651171fa1c75d48678faabcde24914d0fef5ec848070b027decedac

Download Submit
\Windows\SysWOW64\Remcos\remcos.exe

Filesize
469KB

MD5
07b3653e412ef63f2fccef7b404197e8

SHA1
a5b8e29f8b6bbf1e10ab049083b0f214e958edfe

SHA256
41cc93f0e27a97c5a5d6b0e5518fefb39d4cd00e3d8d1c6dc7a84c019099e532

SHA512
dc088419aa3c9fb47d0ed7f318f44d51f84e82525c215ebd66ffc9c68b30410b02c38af4363e4a75838124c57e45f2c7fcad222def30a688d21f90d053696a97

Download Submit
memory/1724-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2352-11-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2352-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2352-12-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads