remcos | 036d32579d1986bae981d1a1259c6911c4014d18c04687f5c607597cc13703ab

Analysis

max time kernel
149s
max time network
143s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
30-11-2024 17:23

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General

Target

remcos.exe
Size

469KB
MD5

e0a193382a236af12dfaf3d1914c6ec5
SHA1

1931c500aead108e6c9b3626c456ff283af87b55
SHA256

036d32579d1986bae981d1a1259c6911c4014d18c04687f5c607597cc13703ab
SHA512

09c3d300b15d4e7f94943a741eda611f10764ebbdbad649052093974f427bce5cbad4ef1cdca6784b7bb6e7a9b4f5abbf5f6b46b3deab55786e2c8d615b85511
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSOn9:uiLJbpI7I2WhQqZ7O9

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

lesbian-failures.gl.at.ply.gg:11241

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-FGMZB0
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 3 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Processes:

reg.exereg.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
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

Processes:

remcos.exeSecurityHealthSystray.exeiexplore.exe

description	ioc	Process
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\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	remcos.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
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\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	iexplore.exe

Deletes itself 1 IoCs

Processes:

WScript.exe

pid	Process
2908	WScript.exe

Executes dropped EXE 1 IoCs

Processes:

SecurityHealthSystray.exe

pid	Process
2596	SecurityHealthSystray.exe

Loads dropped DLL 2 IoCs

Processes:

cmd.exe

pid	Process
2732	cmd.exe
2732	cmd.exe

Adds Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

iexplore.exeremcos.exeSecurityHealthSystray.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\SecurityHealthSystray.exe = "\"C:\\ProgramData\\SecurityHealthSystray\\SecurityHealthSystray.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\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 2 IoCs

Processes:

SecurityHealthSystray.exeiexplore.exe

description	pid	Process	procid_target
PID 2596 set thread context of 2816	2596	SecurityHealthSystray.exe	38
PID 2816 set thread context of 692	2816	iexplore.exe	43

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

Processes:

remcos.execmd.exereg.exeWScript.execmd.exeiexplore.execmd.execmd.exeSecurityHealthSystray.exereg.exereg.exe

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	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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SecurityHealthSystray.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

Processes:

reg.exereg.exereg.exe

pid	Process
2680	reg.exe
2632	reg.exe
2620	reg.exe

Suspicious behavior: MapViewOfSection 2 IoCs

Processes:

SecurityHealthSystray.exeiexplore.exe

pid	Process
2596	SecurityHealthSystray.exe
2816	iexplore.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

remcos.execmd.exeWScript.execmd.exeSecurityHealthSystray.exeiexplore.execmd.execmd.exe

description	pid	Process	procid_target
PID 2116 wrote to memory of 2252	2116	remcos.exe	30
PID 2116 wrote to memory of 2252	2116	remcos.exe	30
PID 2116 wrote to memory of 2252	2116	remcos.exe	30
PID 2116 wrote to memory of 2252	2116	remcos.exe	30
PID 2252 wrote to memory of 2680	2252	cmd.exe	32
PID 2252 wrote to memory of 2680	2252	cmd.exe	32
PID 2252 wrote to memory of 2680	2252	cmd.exe	32
PID 2252 wrote to memory of 2680	2252	cmd.exe	32
PID 2116 wrote to memory of 2908	2116	remcos.exe	33
PID 2116 wrote to memory of 2908	2116	remcos.exe	33
PID 2116 wrote to memory of 2908	2116	remcos.exe	33
PID 2116 wrote to memory of 2908	2116	remcos.exe	33
PID 2908 wrote to memory of 2732	2908	WScript.exe	34
PID 2908 wrote to memory of 2732	2908	WScript.exe	34
PID 2908 wrote to memory of 2732	2908	WScript.exe	34
PID 2908 wrote to memory of 2732	2908	WScript.exe	34
PID 2732 wrote to memory of 2596	2732	cmd.exe	36
PID 2732 wrote to memory of 2596	2732	cmd.exe	36
PID 2732 wrote to memory of 2596	2732	cmd.exe	36
PID 2732 wrote to memory of 2596	2732	cmd.exe	36
PID 2596 wrote to memory of 2708	2596	SecurityHealthSystray.exe	37
PID 2596 wrote to memory of 2708	2596	SecurityHealthSystray.exe	37
PID 2596 wrote to memory of 2708	2596	SecurityHealthSystray.exe	37
PID 2596 wrote to memory of 2708	2596	SecurityHealthSystray.exe	37
PID 2596 wrote to memory of 2816	2596	SecurityHealthSystray.exe	38
PID 2596 wrote to memory of 2816	2596	SecurityHealthSystray.exe	38
PID 2596 wrote to memory of 2816	2596	SecurityHealthSystray.exe	38
PID 2596 wrote to memory of 2816	2596	SecurityHealthSystray.exe	38
PID 2596 wrote to memory of 2816	2596	SecurityHealthSystray.exe	38
PID 2816 wrote to memory of 2568	2816	iexplore.exe	40
PID 2816 wrote to memory of 2568	2816	iexplore.exe	40
PID 2816 wrote to memory of 2568	2816	iexplore.exe	40
PID 2816 wrote to memory of 2568	2816	iexplore.exe	40
PID 2708 wrote to memory of 2632	2708	cmd.exe	41
PID 2708 wrote to memory of 2632	2708	cmd.exe	41
PID 2708 wrote to memory of 2632	2708	cmd.exe	41
PID 2708 wrote to memory of 2632	2708	cmd.exe	41
PID 2816 wrote to memory of 692	2816	iexplore.exe	43
PID 2816 wrote to memory of 692	2816	iexplore.exe	43
PID 2816 wrote to memory of 692	2816	iexplore.exe	43
PID 2816 wrote to memory of 692	2816	iexplore.exe	43
PID 2816 wrote to memory of 692	2816	iexplore.exe	43
PID 2568 wrote to memory of 2620	2568	cmd.exe	44
PID 2568 wrote to memory of 2620	2568	cmd.exe	44
PID 2568 wrote to memory of 2620	2568	cmd.exe	44
PID 2568 wrote to memory of 2620	2568	cmd.exe	44

C:\Users\Admin\AppData\Local\Temp\remcos.exe
"C:\Users\Admin\AppData\Local\Temp\remcos.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:2116
- 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:2252
- - 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:2680
- 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:2908
- - 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:2732
  - - 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:2596
    - - 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:2708
      - 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:2632
    - - \??\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:2816
      - 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:2568
        
        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:2620
      - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        6⤵
        
        PID:692

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
e0a193382a236af12dfaf3d1914c6ec5

SHA1
1931c500aead108e6c9b3626c456ff283af87b55

SHA256
036d32579d1986bae981d1a1259c6911c4014d18c04687f5c607597cc13703ab

SHA512
09c3d300b15d4e7f94943a741eda611f10764ebbdbad649052093974f427bce5cbad4ef1cdca6784b7bb6e7a9b4f5abbf5f6b46b3deab55786e2c8d615b85511

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

Filesize
570B

MD5
75c64d16d4ce64e11e0919abe80b8b5b

SHA1
bfb672540cdc1314bcddaf1ca45aa3e84c81e7be

SHA256
b5300b5bc44eb79035d4d8b3fc0c80dd9ffaec219bae20897fb2606c79137b98

SHA512
f4a835e9e66bdc00c112a365677022045554d4ab5052e1c0d88c329018b68316232a575a3ee15a5807bd73c4f51a261c976696f710a4300f99bbd6a6a716327e

Download Submit
memory/692-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2816-22-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-24-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-13-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

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

Filesize
508KB

Download
memory/2816-19-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-20-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-21-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

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

Filesize
508KB

Download
memory/2816-23-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

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

Filesize
4KB

Download
memory/2816-25-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-26-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-27-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-28-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-29-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-30-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2816-31-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download