remcos | e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181

Analysis

max time kernel
149s
max time network
140s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	Solara2.exe
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

Deletes itself 1 IoCs

pid	Process
2936	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
2744	Solara2.exe

Loads dropped DLL 2 IoCs

pid	Process
2680	cmd.exe
2680	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-1-5-21-1846800975-3917212583-2893086201-1000\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-1-5-21-1846800975-3917212583-2893086201-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsHealth = "\"C:\\Windows\\SysWOW64\\Health\\Solara2.exe\""	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\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\filer32\logs.dat	iexplore.exe
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_221442.dat	iexplore.exe
File opened for modification	C:\Windows\SysWOW64\filer32\logs.dat	iexplore.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2744 set thread context of 2820	2744	Solara2.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 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	reg.exe
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	reg.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	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.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	reg.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
2624	reg.exe
1516	reg.exe
2832	reg.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
2744	Solara2.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2820	iexplore.exe

Suspicious use of WriteProcessMemory 41 IoCs

description	pid	Process	procid_target
PID 2372 wrote to memory of 2780	2372	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	30
PID 2372 wrote to memory of 2780	2372	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	30
PID 2372 wrote to memory of 2780	2372	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	30
PID 2372 wrote to memory of 2780	2372	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	30
PID 2780 wrote to memory of 2832	2780	cmd.exe	32
PID 2780 wrote to memory of 2832	2780	cmd.exe	32
PID 2780 wrote to memory of 2832	2780	cmd.exe	32
PID 2780 wrote to memory of 2832	2780	cmd.exe	32
PID 2372 wrote to memory of 2936	2372	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	33
PID 2372 wrote to memory of 2936	2372	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	33
PID 2372 wrote to memory of 2936	2372	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	33
PID 2372 wrote to memory of 2936	2372	e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe	33
PID 2936 wrote to memory of 2680	2936	WScript.exe	34
PID 2936 wrote to memory of 2680	2936	WScript.exe	34
PID 2936 wrote to memory of 2680	2936	WScript.exe	34
PID 2936 wrote to memory of 2680	2936	WScript.exe	34
PID 2680 wrote to memory of 2744	2680	cmd.exe	36
PID 2680 wrote to memory of 2744	2680	cmd.exe	36
PID 2680 wrote to memory of 2744	2680	cmd.exe	36
PID 2680 wrote to memory of 2744	2680	cmd.exe	36
PID 2744 wrote to memory of 2572	2744	Solara2.exe	37
PID 2744 wrote to memory of 2572	2744	Solara2.exe	37
PID 2744 wrote to memory of 2572	2744	Solara2.exe	37
PID 2744 wrote to memory of 2572	2744	Solara2.exe	37
PID 2744 wrote to memory of 2820	2744	Solara2.exe	38
PID 2744 wrote to memory of 2820	2744	Solara2.exe	38
PID 2744 wrote to memory of 2820	2744	Solara2.exe	38
PID 2744 wrote to memory of 2820	2744	Solara2.exe	38
PID 2744 wrote to memory of 2820	2744	Solara2.exe	38
PID 2820 wrote to memory of 2592	2820	iexplore.exe	40
PID 2820 wrote to memory of 2592	2820	iexplore.exe	40
PID 2820 wrote to memory of 2592	2820	iexplore.exe	40
PID 2820 wrote to memory of 2592	2820	iexplore.exe	40
PID 2572 wrote to memory of 2624	2572	cmd.exe	42
PID 2572 wrote to memory of 2624	2572	cmd.exe	42
PID 2572 wrote to memory of 2624	2572	cmd.exe	42
PID 2572 wrote to memory of 2624	2572	cmd.exe	42
PID 2592 wrote to memory of 1516	2592	cmd.exe	43
PID 2592 wrote to memory of 1516	2592	cmd.exe	43
PID 2592 wrote to memory of 1516	2592	cmd.exe	43
PID 2592 wrote to memory of 1516	2592	cmd.exe	43

C:\Users\Admin\AppData\Local\Temp\e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe
"C:\Users\Admin\AppData\Local\Temp\e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2372
- 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:2780
- - 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:2832
- 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:2936
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\Windows\SysWOW64\Health\Solara2.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2680
  - - 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:2744
    - - 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:2572
      - 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:2624
    - - \??\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:2820
      - 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:2592
        
        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:1516

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
638B

MD5
366dd9ed14f99a7094ae5da81eb2c5f0

SHA1
7bb0c900bd8f11adb7c5b6f0cde85c58833a59a3

SHA256
57f9bcc5b53ac9aaba8275ffcbfe42e9c8f082bacfec7cdca5eb3642b5ea8184

SHA512
598d4c9057486d2e13361c831bb9ea88fbc319d6ba5d080d2f92831d364bdd4d21a341121dc7189ff61d36ff578fa4d54e716bc58aec4ecea165fd8cbce96c6b

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

Filesize
184B

MD5
83ecc186dc788e1203ddfe01edf1ce44

SHA1
55f5d89203f6754467e2d7d2d442bf286ce4add3

SHA256
85fe269e94a75df732b5786ff65fdb5c0faaa0cc52c942f71e46fcf866d5a0cf

SHA512
8a641d009825b0588afb6855dede41f79e5a41355baffac3b0fce132650f0d93d6d4c667bd4f53e9caf134659ee10cc1d036c2b83bec9a5241eddd42a350de62

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

Filesize
469KB

MD5
1f532632777673e522d5c17cd4aed0c0

SHA1
707964883b3168810be0f977e54c7db09fed3668

SHA256
e63b5f8bfd7ef1d06b57fef57e2704592b003a653d132844abf776e2e0752181

SHA512
f5772edfe378b1f283d449c515dc8d36609a017745b8395968681efc1de7e0a3b9fc0c69b193b15c39ea44b9f1163355861fa5000e2fb1ab3734dc20250576ce

Download Submit
memory/2820-25-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-32-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-13-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-17-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-18-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-12-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-26-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-11-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-31-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2820-37-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-38-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-44-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-45-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-50-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-51-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-56-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download
memory/2820-57-0x0000000000270000-0x00000000002EF000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads