remcos | a466e005e900687100fef0e6f22cbab359eff61ed4721d2faa0759ea0b59203a

Analysis

max time kernel
122s
max time network
123s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-12-2024 09:00

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General

Target

stub.exe
Size

469KB
MD5

52b30da6d3eeb564edbf295bd1bf4cdd
SHA1

1cac726321f8aa11d5ba89264854aaf70ccd75fe
SHA256

a466e005e900687100fef0e6f22cbab359eff61ed4721d2faa0759ea0b59203a
SHA512

6b9eb6b49b07150bc49a4b288c08990661188aca94c98c9db558ffe07a059ce4d29fe4d7ed1881a97eb97487486ee99bd8a79bdb1e4e3e2218f6bcabb00419b2
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSYn9:uiLJbpI7I2WhQqZ7Y9

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

me-intranet.gl.at.ply.gg:13055

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
SecurityHealthSystray.exe
copy_folder
SecurityHealthSystray
delete_file
true
hide_file
true
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-OH5SD2
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
SecurityHealthSystray.exe
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 2 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

reg.exereg.exe

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

Processes:

stub.exeSecurityHealthSystray.exe

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	stub.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	stub.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	SecurityHealthSystray.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	SecurityHealthSystray.exe

Deletes itself 1 IoCs

Processes:

WScript.exe

pid	Process
1920	WScript.exe

Executes dropped EXE 1 IoCs

Processes:

SecurityHealthSystray.exe

pid	Process
2676	SecurityHealthSystray.exe

Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid	Process
340	cmd.exe
340	cmd.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

stub.exeSecurityHealthSystray.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	stub.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	stub.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4177215427-74451935-3209572229-1000\Software\Microsoft\Windows\CurrentVersion\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	SecurityHealthSystray.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	SecurityHealthSystray.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

SecurityHealthSystray.exe

description	pid	Process	procid_target
PID 2676 set thread context of 2816	2676	SecurityHealthSystray.exe	38

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

Processes:

stub.execmd.exereg.exeWScript.execmd.exeSecurityHealthSystray.execmd.exereg.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	stub.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	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SecurityHealthSystray.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

T1112

Processes:

reg.exereg.exe

pid	Process
1268	reg.exe
2636	reg.exe

Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

SecurityHealthSystray.exe

pid	Process
2676	SecurityHealthSystray.exe

Suspicious use of WriteProcessMemory 33 IoCs

Processes:

stub.execmd.exeWScript.execmd.exeSecurityHealthSystray.execmd.exe

description	pid	Process	procid_target
PID 352 wrote to memory of 2508	352	stub.exe	30
PID 352 wrote to memory of 2508	352	stub.exe	30
PID 352 wrote to memory of 2508	352	stub.exe	30
PID 352 wrote to memory of 2508	352	stub.exe	30
PID 2508 wrote to memory of 1268	2508	cmd.exe	32
PID 2508 wrote to memory of 1268	2508	cmd.exe	32
PID 2508 wrote to memory of 1268	2508	cmd.exe	32
PID 2508 wrote to memory of 1268	2508	cmd.exe	32
PID 352 wrote to memory of 1920	352	stub.exe	33
PID 352 wrote to memory of 1920	352	stub.exe	33
PID 352 wrote to memory of 1920	352	stub.exe	33
PID 352 wrote to memory of 1920	352	stub.exe	33
PID 1920 wrote to memory of 340	1920	WScript.exe	34
PID 1920 wrote to memory of 340	1920	WScript.exe	34
PID 1920 wrote to memory of 340	1920	WScript.exe	34
PID 1920 wrote to memory of 340	1920	WScript.exe	34
PID 340 wrote to memory of 2676	340	cmd.exe	36
PID 340 wrote to memory of 2676	340	cmd.exe	36
PID 340 wrote to memory of 2676	340	cmd.exe	36
PID 340 wrote to memory of 2676	340	cmd.exe	36
PID 2676 wrote to memory of 2744	2676	SecurityHealthSystray.exe	37
PID 2676 wrote to memory of 2744	2676	SecurityHealthSystray.exe	37
PID 2676 wrote to memory of 2744	2676	SecurityHealthSystray.exe	37
PID 2676 wrote to memory of 2744	2676	SecurityHealthSystray.exe	37
PID 2676 wrote to memory of 2816	2676	SecurityHealthSystray.exe	38
PID 2676 wrote to memory of 2816	2676	SecurityHealthSystray.exe	38
PID 2676 wrote to memory of 2816	2676	SecurityHealthSystray.exe	38
PID 2676 wrote to memory of 2816	2676	SecurityHealthSystray.exe	38
PID 2676 wrote to memory of 2816	2676	SecurityHealthSystray.exe	38
PID 2744 wrote to memory of 2636	2744	cmd.exe	40
PID 2744 wrote to memory of 2636	2744	cmd.exe	40
PID 2744 wrote to memory of 2636	2744	cmd.exe	40
PID 2744 wrote to memory of 2636	2744	cmd.exe	40

C:\Users\Admin\AppData\Local\Temp\stub.exe
"C:\Users\Admin\AppData\Local\Temp\stub.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:352
- 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:2508
- - 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:1268
- 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:1920
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\SecurityHealthSystray\SecurityHealthSystray.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:340
  - - C:\ProgramData\SecurityHealthSystray\SecurityHealthSystray.exe
      C:\ProgramData\SecurityHealthSystray\SecurityHealthSystray.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:2676
    - - 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:2744
      - 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:2636
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        
        PID:2816

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:\ProgramData\SecurityHealthSystray\SecurityHealthSystray.exe

Filesize
469KB

MD5
52b30da6d3eeb564edbf295bd1bf4cdd

SHA1
1cac726321f8aa11d5ba89264854aaf70ccd75fe

SHA256
a466e005e900687100fef0e6f22cbab359eff61ed4721d2faa0759ea0b59203a

SHA512
6b9eb6b49b07150bc49a4b288c08990661188aca94c98c9db558ffe07a059ce4d29fe4d7ed1881a97eb97487486ee99bd8a79bdb1e4e3e2218f6bcabb00419b2

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

Filesize
566B

MD5
533b5f2c2e4e34e9f53d6ee16e056551

SHA1
4245bb269a6c61ceb998d461b58f5f1c05ca9310

SHA256
08198007354e0ee9053e7924e306a88ebdbd82527e95bc85a769f6be42c8358e

SHA512
b43006eea158c1c2909ce96e83e814db11d3731d184814c5f25c31ceb00575b5f072207ef1362c1e94979b270d9562c9073ed43f5ff64c87c41ef272693bc19d

Download Submit
memory/2816-11-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-12-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download