remcos | 71dc9593413d17bc6d72619104a202b94afb37af37130796c853ebc31fca0c7b

Analysis

max time kernel
149s
max time network
145s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
21/11/2024, 03:42

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General

Target

Bank Fund Transfer-589237.scr
Size

1.2MB
MD5

552044ce92b78bf4b68d242c2c380afe
SHA1

2ef4efa20f4fd0d05d8f49ccb22c9afeada93a62
SHA256

cac29565b48f92e8c7a43b7dcca13294bae02890c26df75ae5e5ee31a464e4f3
SHA512

4dc5ef0fb4b80a81015f4507422a67309074ea01787c9ed0d18c850a1d98ea1e3a444993a1d08428331e2ff044390c873d20c31ffbae049e325a82b64d5a3967
SSDEEP

24576:6YdgfvzmIzxWOwxzCJYC3PPoKb0Eci5ihjJVxw9bYOd+8:qzmmWXRCaePPjb0Eci5ih7xw9bYI

Score

10^/10

remcos remotehost discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

212.162.149.226:9285

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
remcos.exe
copy_folder
AppUpdate
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-VCJ8ZS
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
AppUpdate
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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2840	powershell.exe
2768	powershell.exe
2220	powershell.exe
3064	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2364	remcos.exe
3024	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
1704	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-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\AppUpdate = "\"C:\\ProgramData\\AppUpdate\\remcos.exe\""	Bank Fund Transfer-589237.scr
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\AppUpdate = "\"C:\\ProgramData\\AppUpdate\\remcos.exe\""	Bank Fund Transfer-589237.scr
Set value (str)	\REGISTRY\USER\S-1-5-21-1488793075-819845221-1497111674-1000\Software\Microsoft\Windows\CurrentVersion\Run\AppUpdate = "\"C:\\ProgramData\\AppUpdate\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\AppUpdate = "\"C:\\ProgramData\\AppUpdate\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2524 set thread context of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2364 set thread context of 3024	2364	remcos.exe	48

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 12 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	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bank Fund Transfer-589237.scr
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	Bank Fund Transfer-589237.scr
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.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	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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

pid	Process
764	schtasks.exe
2240	schtasks.exe

Suspicious behavior: EnumeratesProcesses 12 IoCs

pid	Process
2524	Bank Fund Transfer-589237.scr
2524	Bank Fund Transfer-589237.scr
2524	Bank Fund Transfer-589237.scr
2524	Bank Fund Transfer-589237.scr
2768	powershell.exe
2840	powershell.exe
2364	remcos.exe
2364	remcos.exe
2364	remcos.exe
2220	powershell.exe
3064	powershell.exe
2364	remcos.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2524	Bank Fund Transfer-589237.scr
Token: SeDebugPrivilege	2768	powershell.exe
Token: SeDebugPrivilege	2840	powershell.exe
Token: SeDebugPrivilege	2364	remcos.exe
Token: SeDebugPrivilege	2220	powershell.exe
Token: SeDebugPrivilege	3064	powershell.exe

Suspicious use of WriteProcessMemory 62 IoCs

description	pid	Process	procid_target
PID 2524 wrote to memory of 2840	2524	Bank Fund Transfer-589237.scr	31
PID 2524 wrote to memory of 2840	2524	Bank Fund Transfer-589237.scr	31
PID 2524 wrote to memory of 2840	2524	Bank Fund Transfer-589237.scr	31
PID 2524 wrote to memory of 2840	2524	Bank Fund Transfer-589237.scr	31
PID 2524 wrote to memory of 2768	2524	Bank Fund Transfer-589237.scr	33
PID 2524 wrote to memory of 2768	2524	Bank Fund Transfer-589237.scr	33
PID 2524 wrote to memory of 2768	2524	Bank Fund Transfer-589237.scr	33
PID 2524 wrote to memory of 2768	2524	Bank Fund Transfer-589237.scr	33
PID 2524 wrote to memory of 764	2524	Bank Fund Transfer-589237.scr	34
PID 2524 wrote to memory of 764	2524	Bank Fund Transfer-589237.scr	34
PID 2524 wrote to memory of 764	2524	Bank Fund Transfer-589237.scr	34
PID 2524 wrote to memory of 764	2524	Bank Fund Transfer-589237.scr	34
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2524 wrote to memory of 2620	2524	Bank Fund Transfer-589237.scr	37
PID 2620 wrote to memory of 1004	2620	Bank Fund Transfer-589237.scr	38
PID 2620 wrote to memory of 1004	2620	Bank Fund Transfer-589237.scr	38
PID 2620 wrote to memory of 1004	2620	Bank Fund Transfer-589237.scr	38
PID 2620 wrote to memory of 1004	2620	Bank Fund Transfer-589237.scr	38
PID 1004 wrote to memory of 1704	1004	WScript.exe	39
PID 1004 wrote to memory of 1704	1004	WScript.exe	39
PID 1004 wrote to memory of 1704	1004	WScript.exe	39
PID 1004 wrote to memory of 1704	1004	WScript.exe	39
PID 1704 wrote to memory of 2364	1704	cmd.exe	41
PID 1704 wrote to memory of 2364	1704	cmd.exe	41
PID 1704 wrote to memory of 2364	1704	cmd.exe	41
PID 1704 wrote to memory of 2364	1704	cmd.exe	41
PID 2364 wrote to memory of 2220	2364	remcos.exe	42
PID 2364 wrote to memory of 2220	2364	remcos.exe	42
PID 2364 wrote to memory of 2220	2364	remcos.exe	42
PID 2364 wrote to memory of 2220	2364	remcos.exe	42
PID 2364 wrote to memory of 3064	2364	remcos.exe	44
PID 2364 wrote to memory of 3064	2364	remcos.exe	44
PID 2364 wrote to memory of 3064	2364	remcos.exe	44
PID 2364 wrote to memory of 3064	2364	remcos.exe	44
PID 2364 wrote to memory of 2240	2364	remcos.exe	45
PID 2364 wrote to memory of 2240	2364	remcos.exe	45
PID 2364 wrote to memory of 2240	2364	remcos.exe	45
PID 2364 wrote to memory of 2240	2364	remcos.exe	45
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48
PID 2364 wrote to memory of 3024	2364	remcos.exe	48

C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr
"C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr" /S
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2524
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2840
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uCItbEGgKu.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2768
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uCItbEGgKu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1777.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:764
- C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr
  "C:\Users\Admin\AppData\Local\Temp\Bank Fund Transfer-589237.scr"
  2⤵
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2620
- - 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:1004
  - - C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\AppUpdate\remcos.exe"
      4⤵
      Loads dropped DLL
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:1704
    - - C:\ProgramData\AppUpdate\remcos.exe
        
        C:\ProgramData\AppUpdate\remcos.exe
        5⤵
        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:2364
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\ProgramData\AppUpdate\remcos.exe"
        6⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:2220
      - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uCItbEGgKu.exe"
        6⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        
        PID:3064
      - C:\Windows\SysWOW64\schtasks.exe
        
        "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uCItbEGgKu" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8037.tmp"
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:2240
      - C:\ProgramData\AppUpdate\remcos.exe
        
        "C:\ProgramData\AppUpdate\remcos.exe"
        6⤵
        Executes dropped EXE
        Adds Run key to start application
        System Location Discovery: System Language Discovery
        
        PID:3024

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\AppUpdate\remcos.exe

Filesize
1.2MB

MD5
552044ce92b78bf4b68d242c2c380afe

SHA1
2ef4efa20f4fd0d05d8f49ccb22c9afeada93a62

SHA256
cac29565b48f92e8c7a43b7dcca13294bae02890c26df75ae5e5ee31a464e4f3

SHA512
4dc5ef0fb4b80a81015f4507422a67309074ea01787c9ed0d18c850a1d98ea1e3a444993a1d08428331e2ff044390c873d20c31ffbae049e325a82b64d5a3967

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

Filesize
392B

MD5
046708368578d720d91fb9ceecec742e

SHA1
1dc732f67f48a1d5694f4cf14a8d279dbd1d6ee6

SHA256
04f4edc28e97a16f93cf7acac864aba17cc467282550ae61baac719262be6f5e

SHA512
9106f645ee74c9e061fcb396a00d706512d41054a356125f26a10d42390d8f0d3ea3dd785393bf5de358b62464ec3c0f7d2e27411e87bb408581f820c427e7f0

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1777.tmp

Filesize
1KB

MD5
1b7a99f00e695978e48aae7bc86e369f

SHA1
2c4e0928f09e48ba3e0c5d36a2bb577cf33c5349

SHA256
e4d0746d3af5131925e0b200053a210a02ea9c4092fe7c13ea504dc0781f705d

SHA512
a41065a9ef5f77b18afbb8cbf17bfab18767230cf1d3c06ef8a35df7877c178390ad332140ecfae9f5753613cb8906e0348820e60bfbf44daca8100de672157c

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\NWCCFJBYBSMNKKANFF5S.temp

Filesize
7KB

MD5
1b6283bc9e300a796ab5a01e36a9a5d7

SHA1
e652f54c92ddd7fb4f467e243c4c92d974818062

SHA256
ed18fd308dbe2720a6f041b32d56a521cd2d53f2fc2855699cea015d33900af0

SHA512
5f042e5318bc8ff318d6045912ec41d4761cfe673bb6dfd421b24633c5ce9baafe058fc587cc5e3f67bd672ac6fe5ff49e9406d436b36afc43ae2f1c21dee365

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

Filesize
7KB

MD5
452db212842c84433e5e2b98dde1a52d

SHA1
f9fe0533146cc776ebd81cc22895a2bcfcf615d9

SHA256
067e48972f79b727ceb44a2d9bf45541075768e514f0def652c0b0a542d20556

SHA512
e1f8523c9186aeb8afcb87eade302db005f6f7696de4a528d8db5838caad9794d323467d3b9f62227eb244df660c7ae546c8f89c09ad48ebe873f79a0647ec2a

Download Submit
memory/2364-46-0x0000000000840000-0x0000000000970000-memory.dmp

Filesize
1.2MB

Download
memory/2364-47-0x00000000003A0000-0x00000000003B2000-memory.dmp

Filesize
72KB

Download
memory/2524-3-0x0000000000420000-0x0000000000432000-memory.dmp

Filesize
72KB

Download
memory/2524-5-0x00000000052C0000-0x0000000005380000-memory.dmp

Filesize
768KB

Download
memory/2524-0-0x00000000742BE000-0x00000000742BF000-memory.dmp

Filesize
4KB

Download
memory/2524-4-0x00000000742B0000-0x000000007499E000-memory.dmp

Filesize
6.9MB

Download
memory/2524-39-0x00000000742B0000-0x000000007499E000-memory.dmp

Filesize
6.9MB

Download
memory/2524-2-0x00000000742B0000-0x000000007499E000-memory.dmp

Filesize
6.9MB

Download
memory/2524-1-0x0000000000E40000-0x0000000000F70000-memory.dmp

Filesize
1.2MB

Download
memory/2620-30-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2620-28-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2620-26-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2620-24-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2620-32-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2620-22-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2620-20-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2620-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2620-35-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2620-36-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/2620-18-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-79-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-81-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-80-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-76-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3024-82-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-83-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-84-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-87-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-88-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-89-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-90-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-92-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/3024-91-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download