remcos | 68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036

Analysis

max time kernel
149s
max time network
121s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
26-09-2024 13:44

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General

Target

TNTinvoice9.26.2024.exe
Size

881KB
MD5

7afd5be4b77090388ddecb8169cf0bc3
SHA1

d3b6ba2e53aed1471c12196c577b7be56d14cf2f
SHA256

68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036
SHA512

2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06
SSDEEP

24576:VE8AE9lxicGLP0CDyB/1FNlUcDos713jb:VExsxiTVe1F/UcDosVb

Score

10^/10

remcos irn discovery execution persistence rat

Malware Config

Extracted

Family

remcos

Botnet

IRN

irnserv1.ddns.net:4424

Attributes

audio_folder
MicRecords
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-CA8761
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
take_screenshot_option
false
take_screenshot_time
5

Signatures

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

pid	Process
3036	powershell.exe
1256	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2536	remcos.exe
1524	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
3000	TNTinvoice9.26.2024.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\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	TNTinvoice9.26.2024.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	TNTinvoice9.26.2024.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 1916 set thread context of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 2536 set thread context of 1524	2536	remcos.exe	44

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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	TNTinvoice9.26.2024.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	TNTinvoice9.26.2024.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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

pid	Process
2688	schtasks.exe
1012	schtasks.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
1916	TNTinvoice9.26.2024.exe
1916	TNTinvoice9.26.2024.exe
1916	TNTinvoice9.26.2024.exe
1916	TNTinvoice9.26.2024.exe
1916	TNTinvoice9.26.2024.exe
1916	TNTinvoice9.26.2024.exe
3036	powershell.exe
1256	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1916	TNTinvoice9.26.2024.exe
Token: SeDebugPrivilege	3036	powershell.exe
Token: SeDebugPrivilege	1256	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1524	remcos.exe

Suspicious use of WriteProcessMemory 58 IoCs

description	pid	Process	procid_target
PID 1916 wrote to memory of 3036	1916	TNTinvoice9.26.2024.exe	31
PID 1916 wrote to memory of 3036	1916	TNTinvoice9.26.2024.exe	31
PID 1916 wrote to memory of 3036	1916	TNTinvoice9.26.2024.exe	31
PID 1916 wrote to memory of 3036	1916	TNTinvoice9.26.2024.exe	31
PID 1916 wrote to memory of 2688	1916	TNTinvoice9.26.2024.exe	33
PID 1916 wrote to memory of 2688	1916	TNTinvoice9.26.2024.exe	33
PID 1916 wrote to memory of 2688	1916	TNTinvoice9.26.2024.exe	33
PID 1916 wrote to memory of 2688	1916	TNTinvoice9.26.2024.exe	33
PID 1916 wrote to memory of 2856	1916	TNTinvoice9.26.2024.exe	35
PID 1916 wrote to memory of 2856	1916	TNTinvoice9.26.2024.exe	35
PID 1916 wrote to memory of 2856	1916	TNTinvoice9.26.2024.exe	35
PID 1916 wrote to memory of 2856	1916	TNTinvoice9.26.2024.exe	35
PID 1916 wrote to memory of 2668	1916	TNTinvoice9.26.2024.exe	36
PID 1916 wrote to memory of 2668	1916	TNTinvoice9.26.2024.exe	36
PID 1916 wrote to memory of 2668	1916	TNTinvoice9.26.2024.exe	36
PID 1916 wrote to memory of 2668	1916	TNTinvoice9.26.2024.exe	36
PID 1916 wrote to memory of 2548	1916	TNTinvoice9.26.2024.exe	37
PID 1916 wrote to memory of 2548	1916	TNTinvoice9.26.2024.exe	37
PID 1916 wrote to memory of 2548	1916	TNTinvoice9.26.2024.exe	37
PID 1916 wrote to memory of 2548	1916	TNTinvoice9.26.2024.exe	37
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 1916 wrote to memory of 3000	1916	TNTinvoice9.26.2024.exe	38
PID 3000 wrote to memory of 2536	3000	TNTinvoice9.26.2024.exe	39
PID 3000 wrote to memory of 2536	3000	TNTinvoice9.26.2024.exe	39
PID 3000 wrote to memory of 2536	3000	TNTinvoice9.26.2024.exe	39
PID 3000 wrote to memory of 2536	3000	TNTinvoice9.26.2024.exe	39
PID 2536 wrote to memory of 1256	2536	remcos.exe	40
PID 2536 wrote to memory of 1256	2536	remcos.exe	40
PID 2536 wrote to memory of 1256	2536	remcos.exe	40
PID 2536 wrote to memory of 1256	2536	remcos.exe	40
PID 2536 wrote to memory of 1012	2536	remcos.exe	42
PID 2536 wrote to memory of 1012	2536	remcos.exe	42
PID 2536 wrote to memory of 1012	2536	remcos.exe	42
PID 2536 wrote to memory of 1012	2536	remcos.exe	42
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44
PID 2536 wrote to memory of 1524	2536	remcos.exe	44

C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe
"C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1916
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3036
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp1555.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2688
- C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe
  "C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe"
  2⤵
  PID:2856
- C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe
  "C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe"
  2⤵
  PID:2668
- C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe
  "C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe"
  2⤵
  PID:2548
- C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe
  "C:\Users\Admin\AppData\Local\Temp\TNTinvoice9.26.2024.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:3000
- - 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 use of WriteProcessMemory
    PID:2536
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1256
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp46EF.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1012
  - - 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:1524

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
e42402b4b76b6032b57be342fc1322d2

SHA1
2b30cf7c64e90076ff8ca700178e7fa6cec92975

SHA256
937ccb09925d64ae2559686959b7da6fd07ac348bf5039dea8ac5c1a3920aa11

SHA512
e86a37c080ce6b60620155558866426b3f415038aecf35b2dc712c50e76b954744fef156ab8edba7f3a59ff6b5fdb01456e77139c58b1516dec4b4227f76e672

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

Filesize
881KB

MD5
7afd5be4b77090388ddecb8169cf0bc3

SHA1
d3b6ba2e53aed1471c12196c577b7be56d14cf2f

SHA256
68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036

SHA512
2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp1555.tmp

Filesize
1KB

MD5
101ed88f727c8b19d4dc5af96c290297

SHA1
3aea33dd9af6b3118d7b09884c7fae226e8438f0

SHA256
aa8267a13c36cfae43ac16641d2daf0665b40c0239bdf41905e40f9cac7eecae

SHA512
012399bfd7d439a5431f83219deabbb93e0d789ef8c65becfbfb117854348ab22c021c0cb8dbc2cd7796a4c0e58d2f5e3618fef630535e36dc0ad031e5b9895c

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

Filesize
7KB

MD5
6d0fb79d17186428fd9d923b95d40a20

SHA1
1ac7523da3920d21657943afedeb604ad83c0b08

SHA256
491694697cc16a9bb2131b6b8f3f2fbea7ed90b12da8d28d9282939f0aab465c

SHA512
bce5400f7ce73cee690ab063a0cc93e90f989261f4a2c787c9d25c682638b8b3e5e73cf31816ef148faec40caab5c0817576d4fcc71d0ca59eff9affb5900ad2

Download Submit
memory/1524-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1524-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1524-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/1524-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/1916-4-0x000000007443E000-0x000000007443F000-memory.dmp

Filesize
4KB

Download
memory/1916-34-0x0000000074430000-0x0000000074B1E000-memory.dmp

Filesize
6.9MB

Download
memory/1916-6-0x0000000005830000-0x00000000058F0000-memory.dmp

Filesize
768KB

Download
memory/1916-5-0x0000000074430000-0x0000000074B1E000-memory.dmp

Filesize
6.9MB

Download
memory/1916-0-0x000000007443E000-0x000000007443F000-memory.dmp

Filesize
4KB

Download
memory/1916-3-0x0000000000600000-0x0000000000610000-memory.dmp

Filesize
64KB

Download
memory/1916-2-0x0000000074430000-0x0000000074B1E000-memory.dmp

Filesize
6.9MB

Download
memory/1916-1-0x00000000000B0000-0x0000000000192000-memory.dmp

Filesize
904KB

Download
memory/2536-41-0x0000000001350000-0x0000000001432000-memory.dmp

Filesize
904KB

Download
memory/3000-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3000-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3000-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3000-12-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3000-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3000-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3000-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3000-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3000-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/3000-29-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/3000-30-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download