remcos | 824ddfdf5560bafc28347fbb92f558b97d4d09d0cf13fa5b57a340ecef837160

Analysis

max time kernel
148s
max time network
146s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
28-11-2024 03:01

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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
2948	powershell.exe
1732	powershell.exe

Executes dropped EXE 2 IoCs

Processes:

remcos.exeremcos.exe

pid	Process
2288	remcos.exe
3044	remcos.exe

Loads dropped DLL 1 IoCs

Processes:

RFQ-00948-STELLION-878378.exe

pid	Process
2304	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-1-5-21-3692679935-4019334568-335155002-1000\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-1-5-21-3692679935-4019334568-335155002-1000\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 2412 set thread context of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2288 set thread context of 3044	2288	remcos.exe	39

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:

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

description	ioc	Process
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
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

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
2148	schtasks.exe
2604	schtasks.exe

Suspicious behavior: EnumeratesProcesses 11 IoCs

Processes:

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

pid	Process
2412	RFQ-00948-STELLION-878378.exe
2412	RFQ-00948-STELLION-878378.exe
2412	RFQ-00948-STELLION-878378.exe
2412	RFQ-00948-STELLION-878378.exe
2412	RFQ-00948-STELLION-878378.exe
2948	powershell.exe
2288	remcos.exe
2288	remcos.exe
2288	remcos.exe
2288	remcos.exe
1732	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

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

description	pid	Process
Token: SeDebugPrivilege	2412	RFQ-00948-STELLION-878378.exe
Token: SeDebugPrivilege	2948	powershell.exe
Token: SeDebugPrivilege	2288	remcos.exe
Token: SeDebugPrivilege	1732	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

remcos.exe

pid	Process
3044	remcos.exe

Suspicious use of WriteProcessMemory 46 IoCs

Processes:

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

description	pid	Process	procid_target
PID 2412 wrote to memory of 2948	2412	RFQ-00948-STELLION-878378.exe	29
PID 2412 wrote to memory of 2948	2412	RFQ-00948-STELLION-878378.exe	29
PID 2412 wrote to memory of 2948	2412	RFQ-00948-STELLION-878378.exe	29
PID 2412 wrote to memory of 2948	2412	RFQ-00948-STELLION-878378.exe	29
PID 2412 wrote to memory of 2148	2412	RFQ-00948-STELLION-878378.exe	31
PID 2412 wrote to memory of 2148	2412	RFQ-00948-STELLION-878378.exe	31
PID 2412 wrote to memory of 2148	2412	RFQ-00948-STELLION-878378.exe	31
PID 2412 wrote to memory of 2148	2412	RFQ-00948-STELLION-878378.exe	31
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2412 wrote to memory of 2304	2412	RFQ-00948-STELLION-878378.exe	33
PID 2304 wrote to memory of 2288	2304	RFQ-00948-STELLION-878378.exe	34
PID 2304 wrote to memory of 2288	2304	RFQ-00948-STELLION-878378.exe	34
PID 2304 wrote to memory of 2288	2304	RFQ-00948-STELLION-878378.exe	34
PID 2304 wrote to memory of 2288	2304	RFQ-00948-STELLION-878378.exe	34
PID 2288 wrote to memory of 1732	2288	remcos.exe	35
PID 2288 wrote to memory of 1732	2288	remcos.exe	35
PID 2288 wrote to memory of 1732	2288	remcos.exe	35
PID 2288 wrote to memory of 1732	2288	remcos.exe	35
PID 2288 wrote to memory of 2604	2288	remcos.exe	36
PID 2288 wrote to memory of 2604	2288	remcos.exe	36
PID 2288 wrote to memory of 2604	2288	remcos.exe	36
PID 2288 wrote to memory of 2604	2288	remcos.exe	36
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39
PID 2288 wrote to memory of 3044	2288	remcos.exe	39

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:2412
- 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:2948
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp80B4.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2148
- 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:2304
- - 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:2288
  - - 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:1732
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmpD817.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:2604
  - - 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:3044

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
e71607e89d3a524a7b181b57ab6431cc

SHA1
6a3f6392914e5ffb13cbe36522fdc1b0eb9a703d

SHA256
700e559588200001cd8ad431cdb249de65c2d8ed4594c6ba3501b73d60b07744

SHA512
da3f5911edfa1cf457e297c24bb0fee72aafcd0013c2144c93582e5376361a55284f2b6f80c85293a67d740ea596a1d39bf0f4f642b47233b02794b8d82e990b

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\tmp80B4.tmp

Filesize
1KB

MD5
cccda801afc7767d90e42ab3d7e2c18a

SHA1
be058ed42792d0b67f7fae28aea5b994f765a7e0

SHA256
7bee047a6d82ccccf4fc6738fbb74b95fd48bde5fc344ad56f48917895ca9693

SHA512
a93f8e405add942b5a6536a90ad098a59d1eb9bc8d9c041b081092b07fc3086035733b3cb4035c8a9e96791147e83ef85f3b2b7136377eb297c90d943d3509ea

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

Filesize
7KB

MD5
b7d0ed72cb7a05b3e4f163ba2e935554

SHA1
c23a73503aabcd92a29ee6d0e35f533aab6520ff

SHA256
2732885c532876c40b7e1eb975fda5d1834037388776f416f5de8a1c8776cccc

SHA512
6dc9b81c63f31fcf8aa3f2f00dbb5a53e6d687edf172b044e551df32c687d364b60a6094b103b1ee3cb387aeaa51d5bd6be216de0823cefd46c4fb750c4021d6

Download Submit
memory/2288-41-0x0000000000FB0000-0x00000000010CC000-memory.dmp

Filesize
1.1MB

Download
memory/2304-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2304-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2304-15-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2304-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2304-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2304-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2304-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2304-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2304-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2304-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2304-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2412-3-0x0000000000520000-0x000000000053C000-memory.dmp

Filesize
112KB

Download
memory/2412-1-0x0000000000030000-0x000000000014C000-memory.dmp

Filesize
1.1MB

Download
memory/2412-4-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/2412-0-0x00000000749AE000-0x00000000749AF000-memory.dmp

Filesize
4KB

Download
memory/2412-6-0x0000000005EE0000-0x0000000005FA4000-memory.dmp

Filesize
784KB

Download
memory/2412-5-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2412-34-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/2412-2-0x00000000749A0000-0x000000007508E000-memory.dmp

Filesize
6.9MB

Download
memory/3044-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3044-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3044-63-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3044-60-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3044-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3044-64-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3044-87-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3044-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3044-99-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3044-101-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download