remcos | e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181

Analysis

max time kernel
149s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
17-09-2024 22:14

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General

Target

e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
Size

469KB
MD5

1f532632777673e522d5c17cd4aed0c0
SHA1

707964883b3168810be0f977e54c7db09fed3668
SHA256

e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181
SHA512

f5772edfe378b1f283d449c515dc8d36609a017745b8395968681efc1de7e0a3b9fc0c69b193b15c39ea44b9f1163355861fa5000e2fb1ab3734dc20250576ce
SSDEEP

12288:umnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS2n9:WiLJbpI7I2WhQqZ729

Score

10^/10

remcos remotehost discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

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

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

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
Solara2.exe
copy_folder
Health
delete_file
true
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%WinDir%\System32
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
filer32
keylog_path
%WinDir%\System32
mouse_option
false
mutex
Rmc-X97XC1
screenshot_crypt
true
screenshot_flag
true
screenshot_folder
Screenshots
screenshot_path
%WinDir%\System32
screenshot_time
10
startup_value
WindowsHealth
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 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	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Solara2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	Solara2.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-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
Key value queried	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
3752	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
4272	Solara2.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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	Solara2.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	Solara2.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe

Drops file in System32 directory 6 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\Health\Solara2.exe	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
File opened for modification	C:\Windows\SysWOW64\Health\Solara2.exe	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
File opened for modification	C:\Windows\SysWOW64\Health	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
File created	C:\Windows\SysWOW64\Screenshots\time_20240917_221443.dat	iexplore.exe
File opened for modification	C:\Windows\SysWOW64\filer32\logs.dat	iexplore.exe
File created	C:\Windows\SysWOW64\filer32\logs.dat	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 4272 set thread context of 3732	4272	Solara2.exe	90

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	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.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	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Solara2.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	reg.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000_Classes\Local Settings	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
1412	reg.exe
1108	reg.exe
2620	reg.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
4272	Solara2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3732	iexplore.exe

Suspicious use of WriteProcessMemory 31 IoCs

description	pid	Process	procid_target
PID 2996 wrote to memory of 4976	2996	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	82
PID 2996 wrote to memory of 4976	2996	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	82
PID 2996 wrote to memory of 4976	2996	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	82
PID 4976 wrote to memory of 2620	4976	cmd.exe	84
PID 4976 wrote to memory of 2620	4976	cmd.exe	84
PID 4976 wrote to memory of 2620	4976	cmd.exe	84
PID 2996 wrote to memory of 3752	2996	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	85
PID 2996 wrote to memory of 3752	2996	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	85
PID 2996 wrote to memory of 3752	2996	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	85
PID 3752 wrote to memory of 776	3752	WScript.exe	86
PID 3752 wrote to memory of 776	3752	WScript.exe	86
PID 3752 wrote to memory of 776	3752	WScript.exe	86
PID 776 wrote to memory of 4272	776	cmd.exe	88
PID 776 wrote to memory of 4272	776	cmd.exe	88
PID 776 wrote to memory of 4272	776	cmd.exe	88
PID 4272 wrote to memory of 3736	4272	Solara2.exe	89
PID 4272 wrote to memory of 3736	4272	Solara2.exe	89
PID 4272 wrote to memory of 3736	4272	Solara2.exe	89
PID 4272 wrote to memory of 3732	4272	Solara2.exe	90
PID 4272 wrote to memory of 3732	4272	Solara2.exe	90
PID 4272 wrote to memory of 3732	4272	Solara2.exe	90
PID 4272 wrote to memory of 3732	4272	Solara2.exe	90
PID 3732 wrote to memory of 3812	3732	iexplore.exe	92
PID 3732 wrote to memory of 3812	3732	iexplore.exe	92
PID 3732 wrote to memory of 3812	3732	iexplore.exe	92
PID 3812 wrote to memory of 1412	3812	cmd.exe	94
PID 3812 wrote to memory of 1412	3812	cmd.exe	94
PID 3812 wrote to memory of 1412	3812	cmd.exe	94
PID 3736 wrote to memory of 1108	3736	cmd.exe	95
PID 3736 wrote to memory of 1108	3736	cmd.exe	95
PID 3736 wrote to memory of 1108	3736	cmd.exe	95

C:\Users\Admin\AppData\Local\Temp\e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
"C:\Users\Admin\AppData\Local\Temp\e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:2996
- 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:4976
- - 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:2620
- 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:3752
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\Health\Solara2.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:776
  - - C:\Windows\SysWOW64\Health\Solara2.exe
      C:\Windows\SysWOW64\Health\Solara2.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:4272
    - - 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:3736
      - 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:1108
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        Drops file in System32 directory
        System Location Discovery: System Language Discovery
        Suspicious use of SetWindowsHookEx
        Suspicious use of WriteProcessMemory
        
        PID:3732
      - 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:3812
        
        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:1412

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

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Downloads

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

Filesize
638B

MD5
366dd9ed14f99a7094ae5da81eb2c5f0

SHA1
7bb0c900bd8f11adb7c5b6f0cde85c58833a59a3

SHA256
57f9bcc5b53ac9aaba8275ffcbfe42e9c8f082bacfec7cdca5eb3642b5ea8184

SHA512
598d4c9057486d2e13361c831bb9ea88fbc319d6ba5d080d2f92831d364bdd4d21a341121dc7189ff61d36ff578fa4d54e716bc58aec4ecea165fd8cbce96c6b

Download Submit
C:\Windows\SysWOW64\Health\Solara2.exe

Filesize
469KB

MD5
1f532632777673e522d5c17cd4aed0c0

SHA1
707964883b3168810be0f977e54c7db09fed3668

SHA256
e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181

SHA512
f5772edfe378b1f283d449c515dc8d36609a017745b8395968681efc1de7e0a3b9fc0c69b193b15c39ea44b9f1163355861fa5000e2fb1ab3734dc20250576ce

Download Submit
C:\Windows\SysWOW64\filer32\logs.dat

Filesize
184B

MD5
57cc637d92e17ffdc045c86f924140d4

SHA1
0fce8238e85cf0c2ea2664758a1c862657d4f683

SHA256
abeaef916c4acb64edb5aa2432a5ce53367121403f3140e7f34dae8d87c96efc

SHA512
a559e0e4940e17563ab6fee2ba5fa8dec7218ebc421189556eb28bc11c0b424efcc049140c333e450bd4e4b28208db43cdeb8cf66a1e91a2d78b81793061c2cd

Download Submit
memory/3732-29-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-36-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-15-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-16-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-10-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-23-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-24-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-9-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-30-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-11-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-35-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-42-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-43-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-48-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-49-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-54-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download
memory/3732-55-0x00000000005C0000-0x000000000063F000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads