remcos | 87e3270c895827876c1b3996d3897df3ff6056c8c728e76bcd69f8d7b2f8d9b5

Analysis

max time kernel
150s
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
21/10/2024, 08:52

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General

Target

remcos_a.exe
Size

469KB
MD5

d987e661f578faf114533d939978d027
SHA1

e73e7be2d0f176cc96f6c659c1072f33745b300a
SHA256

87e3270c895827876c1b3996d3897df3ff6056c8c728e76bcd69f8d7b2f8d9b5
SHA512

d8ac536421fd4a5342d218cfabd263c6a1a062daf36077f7826184d61efdeeb37f12f9cb95f8629dd42a83a44ad27d05d2592d2a4576f45795042a00f169e0d2
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSHn9:uiLJbpI7I2WhQqZ7H9

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

ponscripter-29947.portmap.host:29947

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
scvhost.exe
copy_folder
Remcos
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-5GPHJT
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
scvhost
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 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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\scvhost = "\"C:\\ProgramData\\Remcos\\scvhost.exe\""	remcos_a.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	scvhost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\scvhost = "\"C:\\ProgramData\\Remcos\\scvhost.exe\""	scvhost.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\scvhost = "\"C:\\ProgramData\\Remcos\\scvhost.exe\""	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	remcos_a.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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	remcos_a.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
3608	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
2380	scvhost.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-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\Remcos\\scvhost.exe\""	remcos_a.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\Remcos\\scvhost.exe\""	remcos_a.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\Remcos\\scvhost.exe\""	scvhost.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\Remcos\\scvhost.exe\""	scvhost.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\Remcos\\scvhost.exe\""	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\scvhost = "\"C:\\ProgramData\\Remcos\\scvhost.exe\""	iexplore.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2380 set thread context of 2188	2380	scvhost.exe	96
PID 2188 set thread context of 4988	2188	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	remcos_a.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	scvhost.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	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	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 class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings	remcos_a.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
5016	reg.exe
3628	reg.exe
3456	reg.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2380	scvhost.exe
2188	iexplore.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 4564 wrote to memory of 1480	4564	remcos_a.exe	84
PID 4564 wrote to memory of 1480	4564	remcos_a.exe	84
PID 4564 wrote to memory of 1480	4564	remcos_a.exe	84
PID 1480 wrote to memory of 5016	1480	cmd.exe	86
PID 1480 wrote to memory of 5016	1480	cmd.exe	86
PID 1480 wrote to memory of 5016	1480	cmd.exe	86
PID 4564 wrote to memory of 3608	4564	remcos_a.exe	87
PID 4564 wrote to memory of 3608	4564	remcos_a.exe	87
PID 4564 wrote to memory of 3608	4564	remcos_a.exe	87
PID 3608 wrote to memory of 4160	3608	WScript.exe	91
PID 3608 wrote to memory of 4160	3608	WScript.exe	91
PID 3608 wrote to memory of 4160	3608	WScript.exe	91
PID 4160 wrote to memory of 2380	4160	cmd.exe	93
PID 4160 wrote to memory of 2380	4160	cmd.exe	93
PID 4160 wrote to memory of 2380	4160	cmd.exe	93
PID 2380 wrote to memory of 1884	2380	scvhost.exe	94
PID 2380 wrote to memory of 1884	2380	scvhost.exe	94
PID 2380 wrote to memory of 1884	2380	scvhost.exe	94
PID 2380 wrote to memory of 2188	2380	scvhost.exe	96
PID 2380 wrote to memory of 2188	2380	scvhost.exe	96
PID 2380 wrote to memory of 2188	2380	scvhost.exe	96
PID 2380 wrote to memory of 2188	2380	scvhost.exe	96
PID 1884 wrote to memory of 3628	1884	cmd.exe	97
PID 1884 wrote to memory of 3628	1884	cmd.exe	97
PID 1884 wrote to memory of 3628	1884	cmd.exe	97
PID 2188 wrote to memory of 500	2188	iexplore.exe	98
PID 2188 wrote to memory of 500	2188	iexplore.exe	98
PID 2188 wrote to memory of 500	2188	iexplore.exe	98
PID 2188 wrote to memory of 4988	2188	iexplore.exe	99
PID 2188 wrote to memory of 4988	2188	iexplore.exe	99
PID 2188 wrote to memory of 4988	2188	iexplore.exe	99
PID 2188 wrote to memory of 4988	2188	iexplore.exe	99
PID 500 wrote to memory of 3456	500	cmd.exe	101
PID 500 wrote to memory of 3456	500	cmd.exe	101
PID 500 wrote to memory of 3456	500	cmd.exe	101

C:\Users\Admin\AppData\Local\Temp\remcos_a.exe
"C:\Users\Admin\AppData\Local\Temp\remcos_a.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:4564
- 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:1480
- - 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:5016
- 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:3608
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\scvhost.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4160
  - - C:\ProgramData\Remcos\scvhost.exe
      C:\ProgramData\Remcos\scvhost.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:2380
    - - 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:1884
      - 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:3628
    - - \??\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:2188
      - 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:500
        
        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:3456
      - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        6⤵
        
        PID:4988

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

Replay Monitor

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Downloads

C:\ProgramData\Remcos\scvhost.exe

Filesize
469KB

MD5
d987e661f578faf114533d939978d027

SHA1
e73e7be2d0f176cc96f6c659c1072f33745b300a

SHA256
87e3270c895827876c1b3996d3897df3ff6056c8c728e76bcd69f8d7b2f8d9b5

SHA512
d8ac536421fd4a5342d218cfabd263c6a1a062daf36077f7826184d61efdeeb37f12f9cb95f8629dd42a83a44ad27d05d2592d2a4576f45795042a00f169e0d2

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

Filesize
516B

MD5
ebc4355811bbd16dea05e50be0c10b5c

SHA1
597cf471e93d48a76a3ad4817058d633c6fa371c

SHA256
c722cb5cfbcd8db3d43e89157912259b7678a3757a761d9a14b5aca09e4adff7

SHA512
1b941f704481f520b17408437463e2531bdaddb32172a90a6942975c282cbf92b35d78b512aa61f244ccf30d587c9f1a2b7a982251d14409696c3cefbacfc5fc

Download Submit
memory/2188-9-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-10-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-11-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-16-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-17-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-18-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-19-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-20-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-21-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-22-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-23-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-24-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-25-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-26-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-27-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-28-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-29-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-30-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-31-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-32-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-33-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-34-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

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memory/2188-35-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-36-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-37-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-38-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-39-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-40-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-41-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-42-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-43-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-44-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-45-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-46-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-47-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-48-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-49-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-50-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-51-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-52-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-53-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-54-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-55-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-56-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-57-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-58-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-59-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-60-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-61-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-62-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-63-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-64-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-65-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-66-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-67-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-68-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-69-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-70-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-71-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/2188-72-0x0000000000550000-0x00000000005CF000-memory.dmp

Filesize
508KB

Download
memory/4988-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4988-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads