remcos | 87e3270c895827876c1b3996d3897df3ff6056c8c728e76bcd69f8d7b2f8d9b5

Analysis

max time kernel
15s
max time network
20s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-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 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
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	remcos_a.exe

Deletes itself 1 IoCs

pid	Process
2868	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
3000	scvhost.exe

Loads dropped DLL 2 IoCs

pid	Process
2860	cmd.exe
2860	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-1-5-21-3692679935-4019334568-335155002-1000\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-1-5-21-3692679935-4019334568-335155002-1000\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

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3000 set thread context of 2752	3000	scvhost.exe	37

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	WScript.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	reg.exe
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	reg.exe

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

T1112

pid	Process
1860	reg.exe
828	reg.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
3000	scvhost.exe

Suspicious use of WriteProcessMemory 33 IoCs

description	pid	Process	procid_target
PID 2328 wrote to memory of 2268	2328	remcos_a.exe	29
PID 2328 wrote to memory of 2268	2328	remcos_a.exe	29
PID 2328 wrote to memory of 2268	2328	remcos_a.exe	29
PID 2328 wrote to memory of 2268	2328	remcos_a.exe	29
PID 2268 wrote to memory of 1860	2268	cmd.exe	31
PID 2268 wrote to memory of 1860	2268	cmd.exe	31
PID 2268 wrote to memory of 1860	2268	cmd.exe	31
PID 2268 wrote to memory of 1860	2268	cmd.exe	31
PID 2328 wrote to memory of 2868	2328	remcos_a.exe	32
PID 2328 wrote to memory of 2868	2328	remcos_a.exe	32
PID 2328 wrote to memory of 2868	2328	remcos_a.exe	32
PID 2328 wrote to memory of 2868	2328	remcos_a.exe	32
PID 2868 wrote to memory of 2860	2868	WScript.exe	33
PID 2868 wrote to memory of 2860	2868	WScript.exe	33
PID 2868 wrote to memory of 2860	2868	WScript.exe	33
PID 2868 wrote to memory of 2860	2868	WScript.exe	33
PID 2860 wrote to memory of 3000	2860	cmd.exe	35
PID 2860 wrote to memory of 3000	2860	cmd.exe	35
PID 2860 wrote to memory of 3000	2860	cmd.exe	35
PID 2860 wrote to memory of 3000	2860	cmd.exe	35
PID 3000 wrote to memory of 2980	3000	scvhost.exe	36
PID 3000 wrote to memory of 2980	3000	scvhost.exe	36
PID 3000 wrote to memory of 2980	3000	scvhost.exe	36
PID 3000 wrote to memory of 2980	3000	scvhost.exe	36
PID 3000 wrote to memory of 2752	3000	scvhost.exe	37
PID 3000 wrote to memory of 2752	3000	scvhost.exe	37
PID 3000 wrote to memory of 2752	3000	scvhost.exe	37
PID 3000 wrote to memory of 2752	3000	scvhost.exe	37
PID 3000 wrote to memory of 2752	3000	scvhost.exe	37
PID 2980 wrote to memory of 828	2980	cmd.exe	39
PID 2980 wrote to memory of 828	2980	cmd.exe	39
PID 2980 wrote to memory of 828	2980	cmd.exe	39
PID 2980 wrote to memory of 828	2980	cmd.exe	39

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
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2328
- 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:2268
- - 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:1860
- 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:2868
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\scvhost.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2860
  - - 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:3000
    - - 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:2980
      - 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:828
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        
        PID:2752

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
516B

MD5
ebc4355811bbd16dea05e50be0c10b5c

SHA1
597cf471e93d48a76a3ad4817058d633c6fa371c

SHA256
c722cb5cfbcd8db3d43e89157912259b7678a3757a761d9a14b5aca09e4adff7

SHA512
1b941f704481f520b17408437463e2531bdaddb32172a90a6942975c282cbf92b35d78b512aa61f244ccf30d587c9f1a2b7a982251d14409696c3cefbacfc5fc

Download Submit
\ProgramData\Remcos\scvhost.exe

Filesize
469KB

MD5
d987e661f578faf114533d939978d027

SHA1
e73e7be2d0f176cc96f6c659c1072f33745b300a

SHA256
87e3270c895827876c1b3996d3897df3ff6056c8c728e76bcd69f8d7b2f8d9b5

SHA512
d8ac536421fd4a5342d218cfabd263c6a1a062daf36077f7826184d61efdeeb37f12f9cb95f8629dd42a83a44ad27d05d2592d2a4576f45795042a00f169e0d2

Download Submit
memory/2752-12-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2752-11-0x0000000000080000-0x00000000000FF000-memory.dmp

Filesize
508KB

Download
memory/2752-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads