remcos | 824ddfdf5560bafc28347fbb92f558b97d4d09d0cf13fa5b57a340ecef837160

Analysis

max time kernel
119s
max time network
114s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
01-12-2024 15:39

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General

Target

RFQ-00948-STELLION-878378.exe
Size

1.1MB
MD5

7d78937ebc3648958437741df13eec52
SHA1

9b30169d5adb06c082d6b9e297368faad45725f5
SHA256

ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a
SHA512

7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4
SSDEEP

24576:PYoOciJwQYaoRuivChV3DSwctuoqBMY9zVZEueHTf:PsbwQIRssqBMWVZEu

Score

10^/10

remcos remotehost discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

206.189.218.238:4782

206.189.218.238:2286

206.189.218.238:3363

206.189.218.238:3386

Attributes

audio_folder
MicRecords
audio_path
ApplicationPath
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
keylog_crypt
false
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
mouse_option
false
mutex
Rmc-NJK093
screenshot_crypt
false
screenshot_flag
true
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
1
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

Processes:

powershell.exepowershell.exe

pid	Process
2580	powershell.exe
3008	powershell.exe

Executes dropped EXE 3 IoCs

Processes:

remcos.exeremcos.exeremcos.exe

pid	Process
2928	remcos.exe
2844	remcos.exe
2996	remcos.exe

Loads dropped DLL 1 IoCs

Processes:

RFQ-00948-STELLION-878378.exe

pid	Process
2752	RFQ-00948-STELLION-878378.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

RFQ-00948-STELLION-878378.exeremcos.exe

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-NJK093 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	RFQ-00948-STELLION-878378.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-NJK093 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	RFQ-00948-STELLION-878378.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-NJK093 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-NJK093 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

Processes:

RFQ-00948-STELLION-878378.exeremcos.exe

description	pid	Process	procid_target
PID 2444 set thread context of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2928 set thread context of 2996	2928	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 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

Processes:

schtasks.exeRFQ-00948-STELLION-878378.exeremcos.exepowershell.exeschtasks.exeremcos.exeRFQ-00948-STELLION-878378.exepowershell.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ-00948-STELLION-878378.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RFQ-00948-STELLION-878378.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

Processes:

schtasks.exeschtasks.exe

pid	Process
2728	schtasks.exe
2852	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

RFQ-00948-STELLION-878378.exepowershell.exeremcos.exepowershell.exe

pid	Process
2444	RFQ-00948-STELLION-878378.exe
2444	RFQ-00948-STELLION-878378.exe
2444	RFQ-00948-STELLION-878378.exe
2444	RFQ-00948-STELLION-878378.exe
2580	powershell.exe
2928	remcos.exe
2928	remcos.exe
2928	remcos.exe
3008	powershell.exe
2928	remcos.exe
2928	remcos.exe
2928	remcos.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

RFQ-00948-STELLION-878378.exepowershell.exeremcos.exepowershell.exe

description	pid	Process
Token: SeDebugPrivilege	2444	RFQ-00948-STELLION-878378.exe
Token: SeDebugPrivilege	2580	powershell.exe
Token: SeDebugPrivilege	2928	remcos.exe
Token: SeDebugPrivilege	3008	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

remcos.exe

pid	Process
2996	remcos.exe

Suspicious use of WriteProcessMemory 50 IoCs

Processes:

RFQ-00948-STELLION-878378.exeRFQ-00948-STELLION-878378.exeremcos.exe

description	pid	Process	procid_target
PID 2444 wrote to memory of 2580	2444	RFQ-00948-STELLION-878378.exe	31
PID 2444 wrote to memory of 2580	2444	RFQ-00948-STELLION-878378.exe	31
PID 2444 wrote to memory of 2580	2444	RFQ-00948-STELLION-878378.exe	31
PID 2444 wrote to memory of 2580	2444	RFQ-00948-STELLION-878378.exe	31
PID 2444 wrote to memory of 2728	2444	RFQ-00948-STELLION-878378.exe	32
PID 2444 wrote to memory of 2728	2444	RFQ-00948-STELLION-878378.exe	32
PID 2444 wrote to memory of 2728	2444	RFQ-00948-STELLION-878378.exe	32
PID 2444 wrote to memory of 2728	2444	RFQ-00948-STELLION-878378.exe	32
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2444 wrote to memory of 2752	2444	RFQ-00948-STELLION-878378.exe	35
PID 2752 wrote to memory of 2928	2752	RFQ-00948-STELLION-878378.exe	36
PID 2752 wrote to memory of 2928	2752	RFQ-00948-STELLION-878378.exe	36
PID 2752 wrote to memory of 2928	2752	RFQ-00948-STELLION-878378.exe	36
PID 2752 wrote to memory of 2928	2752	RFQ-00948-STELLION-878378.exe	36
PID 2928 wrote to memory of 3008	2928	remcos.exe	37
PID 2928 wrote to memory of 3008	2928	remcos.exe	37
PID 2928 wrote to memory of 3008	2928	remcos.exe	37
PID 2928 wrote to memory of 3008	2928	remcos.exe	37
PID 2928 wrote to memory of 2852	2928	remcos.exe	39
PID 2928 wrote to memory of 2852	2928	remcos.exe	39
PID 2928 wrote to memory of 2852	2928	remcos.exe	39
PID 2928 wrote to memory of 2852	2928	remcos.exe	39
PID 2928 wrote to memory of 2844	2928	remcos.exe	41
PID 2928 wrote to memory of 2844	2928	remcos.exe	41
PID 2928 wrote to memory of 2844	2928	remcos.exe	41
PID 2928 wrote to memory of 2844	2928	remcos.exe	41
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42
PID 2928 wrote to memory of 2996	2928	remcos.exe	42

C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
"C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2444
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2580
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9E0.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2728
- C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
  "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2752
- - C:\ProgramData\Remcos\remcos.exe
    "C:\ProgramData\Remcos\remcos.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:2928
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:3008
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp58CA.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2852
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      PID:2844
  - - C:\ProgramData\Remcos\remcos.exe
      "C:\ProgramData\Remcos\remcos.exe"
      4⤵
      Executes dropped EXE
      Adds Run key to start application
      System Location Discovery: System Language Discovery
      Suspicious use of SetWindowsHookEx
      PID:2996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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:\ProgramData\Remcos\logs.dat

Filesize
144B

MD5
5b9db7ce267473d0bfba2e7005c658da

SHA1
d77bfc6c9f02dae095d36e4e2da39bc23c14b6e7

SHA256
7f0b86e86ca74def7befac12f169571be2547f32316e6c1367a347f323f0f3a8

SHA512
b2a0708361d3c4bfa7f30b0187f675e17d6a41fde8acb4f0738152c002074d021248a56888296f5d911bf91015fdca158d178b4e0b35e0ba112914c9ef45e002

Download Submit
C:\ProgramData\Remcos\remcos.exe

Filesize
1.1MB

MD5
7d78937ebc3648958437741df13eec52

SHA1
9b30169d5adb06c082d6b9e297368faad45725f5

SHA256
ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

SHA512
7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp9E0.tmp

Filesize
1KB

MD5
e5d36c13371363fb42ec805c2e8a8e7d

SHA1
3ae6882f47912e6d7c4af8d52a030e3f7be08031

SHA256
05d55c55ed83d08b94626d87d9fddb38b555feb7bd24b8e3ced9de0c073553dc

SHA512
c1904f70a0ddfe2f331d664b3261546b421d514989aaa94e2229214a50c434f60fc1524ff914e36ff0aea0300be20cd266180c9ef1c034acf11c3d3a1294a567

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

Filesize
7KB

MD5
0f9ad9debe7d580d7f49d20fa8cef01f

SHA1
92aa583696d9958b0cbaf90c3e40f562d5107766

SHA256
28cce47a36184f810b5fbffbc286ea31a8e0326c4911253523b8b4a1295def82

SHA512
6919576b3e5be242d66f0cd616e371f2077809c1f5b4d11f8981c93ab70745203dd94e6b361f0a5c6a97fffdc6e5dd027ed60bb4896acf35d1ddddc39a529607

Download Submit
memory/2444-40-0x0000000073CC0000-0x00000000743AE000-memory.dmp

Filesize
6.9MB

Download
memory/2444-1-0x00000000001D0000-0x00000000002EC000-memory.dmp

Filesize
1.1MB

Download
memory/2444-2-0x0000000073CC0000-0x00000000743AE000-memory.dmp

Filesize
6.9MB

Download
memory/2444-3-0x0000000000670000-0x000000000068C000-memory.dmp

Filesize
112KB

Download
memory/2444-4-0x0000000073CCE000-0x0000000073CCF000-memory.dmp

Filesize
4KB

Download
memory/2444-5-0x0000000073CC0000-0x00000000743AE000-memory.dmp

Filesize
6.9MB

Download
memory/2444-6-0x0000000007DC0000-0x0000000007E84000-memory.dmp

Filesize
784KB

Download
memory/2444-0-0x0000000073CCE000-0x0000000073CCF000-memory.dmp

Filesize
4KB

Download
memory/2752-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2752-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2752-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2752-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2752-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2752-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2752-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2752-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2752-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2752-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2752-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2928-41-0x0000000000240000-0x000000000035C000-memory.dmp

Filesize
1.1MB

Download
memory/2996-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2996-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2996-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2996-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2996-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2996-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2996-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2996-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download