remcos | 329eb8f2ecbea9a9cc0e9c84f5ba029a7c3f4f54d1bbbf8e09431318d4325610

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
29-12-2024 08:09

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General

Target

418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
Size

1.3MB
MD5

349d827857cd2dc23fb06077d246f9ea
SHA1

78ee20b8ec3ba85a2181f25ea896b6fa99c4302f
SHA256

418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63
SHA512

ab9a1f0fbd030acd105cc3045b4bae667a8b26aa66c30504f9201ad9361697d1e2a133b7f6d2d78f09fcdc0e2783459efdaa41636a94d1f6b42bab546aeeabee
SSDEEP

24576:DcKOYIFAIu83P3+qKaIbEnR6OJIQoJfZp63sQubuMrZzeG2:dO97ROqKaZdIQolL63jcTze/

Score

10^/10

remcos remotehost discovery persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

79.134.225.7:2050

Attributes

audio_folder
MicRecords
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
Remcos
delete_file
false
hide_file
false
hide_keylog_file
false
install_flag
true
install_path
%AppData%
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%AppData%
mouse_option
false
mutex
Remcos-TTGDBF
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
Remcos
take_screenshot_option
false
take_screenshot_time
5
take_screenshot_title
notepad;solitaire;

Signatures

Remcos
Remcos is a closed-source remote control and surveillance software.
rat remcos
Remcos family
remcos

Executes dropped EXE 2 IoCs

pid	Process
4992	remcos.exe
4796	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
4968	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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\huss = "\"C:\\Users\\Admin\\AppData\\Local\\huss.exe\""	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\huss = "\"C:\\Users\\Admin\\AppData\\Local\\huss.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\Users\\Admin\\AppData\\Roaming\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1852 set thread context of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 4992 set thread context of 4796	4992	remcos.exe	42

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 9 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	cmd.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	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	timeout.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Delays execution with timeout.exe 2 IoCs

evasion

pid	Process
4676	timeout.exe
4744	timeout.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
4992	remcos.exe
4992	remcos.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
Token: SeDebugPrivilege	4992	remcos.exe

Suspicious use of WriteProcessMemory 54 IoCs

description	pid	Process	procid_target
PID 1852 wrote to memory of 4632	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	31
PID 1852 wrote to memory of 4632	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	31
PID 1852 wrote to memory of 4632	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	31
PID 1852 wrote to memory of 4632	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	31
PID 4632 wrote to memory of 4676	4632	cmd.exe	33
PID 4632 wrote to memory of 4676	4632	cmd.exe	33
PID 4632 wrote to memory of 4676	4632	cmd.exe	33
PID 4632 wrote to memory of 4676	4632	cmd.exe	33
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 1852 wrote to memory of 4788	1852	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	34
PID 4788 wrote to memory of 4912	4788	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	35
PID 4788 wrote to memory of 4912	4788	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	35
PID 4788 wrote to memory of 4912	4788	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	35
PID 4788 wrote to memory of 4912	4788	418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe	35
PID 4912 wrote to memory of 4968	4912	WScript.exe	36
PID 4912 wrote to memory of 4968	4912	WScript.exe	36
PID 4912 wrote to memory of 4968	4912	WScript.exe	36
PID 4912 wrote to memory of 4968	4912	WScript.exe	36
PID 4968 wrote to memory of 4992	4968	cmd.exe	38
PID 4968 wrote to memory of 4992	4968	cmd.exe	38
PID 4968 wrote to memory of 4992	4968	cmd.exe	38
PID 4968 wrote to memory of 4992	4968	cmd.exe	38
PID 4992 wrote to memory of 2220	4992	remcos.exe	39
PID 4992 wrote to memory of 2220	4992	remcos.exe	39
PID 4992 wrote to memory of 2220	4992	remcos.exe	39
PID 4992 wrote to memory of 2220	4992	remcos.exe	39
PID 2220 wrote to memory of 4744	2220	cmd.exe	41
PID 2220 wrote to memory of 4744	2220	cmd.exe	41
PID 2220 wrote to memory of 4744	2220	cmd.exe	41
PID 2220 wrote to memory of 4744	2220	cmd.exe	41
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42
PID 4992 wrote to memory of 4796	4992	remcos.exe	42

C:\Users\Admin\AppData\Local\Temp\418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
"C:\Users\Admin\AppData\Local\Temp\418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1852
- C:\Windows\SysWOW64\cmd.exe
  "C:\Windows\System32\cmd.exe" /c timeout 20
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4632
- - C:\Windows\SysWOW64\timeout.exe
    timeout 20
    3⤵
    - System Location Discovery: System Language Discovery
    - Delays execution with timeout.exe
    PID:4676
- C:\Users\Admin\AppData\Local\Temp\418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
  C:\Users\Admin\AppData\Local\Temp\418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63.exe
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4788
- - C:\Windows\SysWOW64\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:4912
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe"
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:4968
    - - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        5⤵
        Executes dropped EXE
        Adds Run key to start application
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:4992
      - C:\Windows\SysWOW64\cmd.exe
        
        "C:\Windows\System32\cmd.exe" /c timeout 20
        6⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2220
        
        C:\Windows\SysWOW64\timeout.exe
        
        timeout 20
        7⤵
        System Location Discovery: System Language Discovery
        Delays execution with timeout.exe
        
        PID:4744
      - C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        
        C:\Users\Admin\AppData\Roaming\Remcos\remcos.exe
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        
        PID:4796

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

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

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

Replay Monitor

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Downloads

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

Filesize
418B

MD5
b92d64fe5b1d1f59df4b738262aea8df

SHA1
c8fb1981759c2d9bb2ec91b705985fba5fc7af63

SHA256
fa20e9aab03dc8e9f1910aaf0cf42662379fa16ae3a22642084fb97fa3d4f83a

SHA512
2566248b93c0cfb0414f033b8dd18bbd4f88180093eac2861107289bcb4ee160f9593706ff1f7d1f2e4ecea430d67a5a2897551a4f9ebd82b707243e300520e2

Download Submit
\Users\Admin\AppData\Roaming\Remcos\remcos.exe

Filesize
1.3MB

MD5
349d827857cd2dc23fb06077d246f9ea

SHA1
78ee20b8ec3ba85a2181f25ea896b6fa99c4302f

SHA256
418cc2f738fc7f9ebdf659f04ad39c5cf02bb1ee9221955accbe5357a7a6ca63

SHA512
ab9a1f0fbd030acd105cc3045b4bae667a8b26aa66c30504f9201ad9361697d1e2a133b7f6d2d78f09fcdc0e2783459efdaa41636a94d1f6b42bab546aeeabee

Download Submit
memory/1852-37-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-1995-0x00000000007F0000-0x000000000083C000-memory.dmp

Filesize
304KB

Download
memory/1852-4-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-33-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-35-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-41-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-47-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-7-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-43-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-57-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-65-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-67-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-59-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-63-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-61-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-55-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-53-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-29-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-49-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-45-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-39-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-0-0x000000007424E000-0x000000007424F000-memory.dmp

Filesize
4KB

Download
memory/1852-5-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-1-0x0000000000B80000-0x0000000000CC8000-memory.dmp

Filesize
1.3MB

Download
memory/1852-51-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-27-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-25-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-23-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-21-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-19-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-17-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-15-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-13-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-11-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-9-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-1994-0x0000000000A10000-0x0000000000A7C000-memory.dmp

Filesize
432KB

Download
memory/1852-1996-0x000000007424E000-0x000000007424F000-memory.dmp

Filesize
4KB

Download
memory/1852-1997-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/1852-31-0x0000000004D50000-0x0000000004E87000-memory.dmp

Filesize
1.2MB

Download
memory/1852-2018-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/1852-2-0x0000000074240000-0x000000007492E000-memory.dmp

Filesize
6.9MB

Download
memory/1852-3-0x0000000004D50000-0x0000000004E8C000-memory.dmp

Filesize
1.2MB

Download
memory/4788-2021-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/4788-2015-0x0000000000400000-0x000000000047A000-memory.dmp

Filesize
488KB

Download
memory/4992-2026-0x0000000000F90000-0x00000000010D8000-memory.dmp

Filesize
1.3MB

Download