remcos | a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4

Analysis

max time kernel
149s
max time network
150s
platform
windows7_x64
resource
win7-20240729-en
resource tags

arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
submitted
06-10-2024 16:27

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General

Target

a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe
Size

1017KB
MD5

673d693b0c8b68503d64ed15fd863d61
SHA1

4fb6b11e933354b9f7c5bda096543a5d6b56ff83
SHA256

a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4
SHA512

3996083d6b2f207e742a81a1dd11277c1bdb2631438a0ee72eeec88a57ff39fb2a7c9a100b30bc2839519c3019129d2157e89d6ade8cc326c4073daf4cc2bd27
SSDEEP

24576:myN887MU2cPnNupjbW/5OheoofVmhGmfCtquly:myNVQUPNudihOhRdhHIqul

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
2700	powershell.exe
1672	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2764	remcos.exe
2516	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
2868	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.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\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\""	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2703099537-420551529-3771253338-1000\Software\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 376 set thread context of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2764 set thread context of 2516	2764	remcos.exe	40

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	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	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.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	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.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

pid	Process
2804	schtasks.exe
804	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2700	powershell.exe
1672	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2700	powershell.exe
Token: SeDebugPrivilege	1672	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2516	remcos.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 376 wrote to memory of 2700	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	30
PID 376 wrote to memory of 2700	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	30
PID 376 wrote to memory of 2700	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	30
PID 376 wrote to memory of 2700	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	30
PID 376 wrote to memory of 2804	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	32
PID 376 wrote to memory of 2804	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	32
PID 376 wrote to memory of 2804	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	32
PID 376 wrote to memory of 2804	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	32
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 376 wrote to memory of 2868	376	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2868 wrote to memory of 2764	2868	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	35
PID 2868 wrote to memory of 2764	2868	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	35
PID 2868 wrote to memory of 2764	2868	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	35
PID 2868 wrote to memory of 2764	2868	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	35
PID 2764 wrote to memory of 1672	2764	remcos.exe	36
PID 2764 wrote to memory of 1672	2764	remcos.exe	36
PID 2764 wrote to memory of 1672	2764	remcos.exe	36
PID 2764 wrote to memory of 1672	2764	remcos.exe	36
PID 2764 wrote to memory of 804	2764	remcos.exe	37
PID 2764 wrote to memory of 804	2764	remcos.exe	37
PID 2764 wrote to memory of 804	2764	remcos.exe	37
PID 2764 wrote to memory of 804	2764	remcos.exe	37
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40
PID 2764 wrote to memory of 2516	2764	remcos.exe	40

C:\Users\Admin\AppData\Local\Temp\a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe
"C:\Users\Admin\AppData\Local\Temp\a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe"
1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:376
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mDBLQPaU.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2700
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp92DD.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2804
- C:\Users\Admin\AppData\Local\Temp\a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe
  "C:\Users\Admin\AppData\Local\Temp\a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe"
  2⤵
  - Loads dropped DLL
  - Adds Run key to start application
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2868
- - 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:2764
  - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mDBLQPaU.exe"
      4⤵
      Command and Scripting Interpreter: PowerShell
      System Location Discovery: System Language Discovery
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      PID:1672
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC5CF.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:804
  - - 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:2516

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
bede0cd80a07087694dda6ebc1209dba

SHA1
0b45592669df4025055870928d66aef11d951356

SHA256
d76fb349e9f599b0ca409788feb077f736005c0dfa2cdb2a14e3e27d45f16aae

SHA512
5a53bbc90aa23cd0a64f08547067128fc83bc7b6d1905f3469b8216d323f19fb723865e64e6e02ded783a1192d19690331ece39600689d212b4ec1570b87afb1

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp92DD.tmp

Filesize
1KB

MD5
259153c6924bc703ffbdd15bde85f914

SHA1
d77ef5bccea8372a1397860665ecac0854b2a38b

SHA256
0a1564eaab92513cfdef4b01b81ed2c93f60344136660cd256ad56ebf1388f5d

SHA512
94798070a6f6311ce1c61fe24e8f8a7ff2cbc9a22006a2cf2112b17a2ec2f946d9aca3ab37b1151a30bc4637ef07b2b9401ce7cf46c9e2f8d6317d37edd927c9

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

Filesize
7KB

MD5
cb12deacb0ed6af005fa828bcc1eaf55

SHA1
8165a79b54a29bfc477c984b01567ccec1ef0e7b

SHA256
2bb8756ea1e5e446a8e30a328ab4e25adbbb03429b9280847d40efde1810c035

SHA512
851ea7013022273304f0ba2aa8caaaa662d41c77fd4b520db2708e49d0219383d4cc323cb4d411ef2d989c795f3bf83b96141274a3a0b70979ece79602057773

Download Submit
\ProgramData\Remcos\remcos.exe

Filesize
1017KB

MD5
673d693b0c8b68503d64ed15fd863d61

SHA1
4fb6b11e933354b9f7c5bda096543a5d6b56ff83

SHA256
a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4

SHA512
3996083d6b2f207e742a81a1dd11277c1bdb2631438a0ee72eeec88a57ff39fb2a7c9a100b30bc2839519c3019129d2157e89d6ade8cc326c4073daf4cc2bd27

Download Submit
memory/376-6-0x0000000005C30000-0x0000000005CF0000-memory.dmp

Filesize
768KB

Download
memory/376-5-0x00000000744B0000-0x0000000074B9E000-memory.dmp

Filesize
6.9MB

Download
memory/376-4-0x00000000744BE000-0x00000000744BF000-memory.dmp

Filesize
4KB

Download
memory/376-3-0x0000000000970000-0x000000000098E000-memory.dmp

Filesize
120KB

Download
memory/376-0-0x00000000744BE000-0x00000000744BF000-memory.dmp

Filesize
4KB

Download
memory/376-33-0x00000000744B0000-0x0000000074B9E000-memory.dmp

Filesize
6.9MB

Download
memory/376-2-0x00000000744B0000-0x0000000074B9E000-memory.dmp

Filesize
6.9MB

Download
memory/376-1-0x0000000000AD0000-0x0000000000BD4000-memory.dmp

Filesize
1.0MB

Download
memory/2516-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-91-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-101-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-99-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-98-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-97-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-96-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-94-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-70-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-66-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2516-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-76-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-79-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-83-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-88-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-85-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2516-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2764-41-0x0000000000DF0000-0x0000000000EF4000-memory.dmp

Filesize
1.0MB

Download
memory/2868-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-24-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2868-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2868-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download