remcos | a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4

Analysis

max time kernel
150s
max time network
150s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
05/10/2024, 01:41

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

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
2116	powershell.exe
2816	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
1120	remcos.exe
2888	remcos.exe

Loads dropped DLL 1 IoCs

pid	Process
2144	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\USER\S-1-5-21-3533259084-2542256011-65585152-1000\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-1-5-21-3533259084-2542256011-65585152-1000\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 2728 set thread context of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 1120 set thread context of 2888	1120	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	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.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	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.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
2684	schtasks.exe
1304	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2816	powershell.exe
2116	powershell.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2816	powershell.exe
Token: SeDebugPrivilege	2116	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2888	remcos.exe

Suspicious use of WriteProcessMemory 46 IoCs

description	pid	Process	procid_target
PID 2728 wrote to memory of 2816	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	30
PID 2728 wrote to memory of 2816	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	30
PID 2728 wrote to memory of 2816	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	30
PID 2728 wrote to memory of 2816	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	30
PID 2728 wrote to memory of 2684	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	32
PID 2728 wrote to memory of 2684	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	32
PID 2728 wrote to memory of 2684	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	32
PID 2728 wrote to memory of 2684	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	32
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2728 wrote to memory of 2144	2728	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	34
PID 2144 wrote to memory of 1120	2144	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	35
PID 2144 wrote to memory of 1120	2144	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	35
PID 2144 wrote to memory of 1120	2144	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	35
PID 2144 wrote to memory of 1120	2144	a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe	35
PID 1120 wrote to memory of 2116	1120	remcos.exe	36
PID 1120 wrote to memory of 2116	1120	remcos.exe	36
PID 1120 wrote to memory of 2116	1120	remcos.exe	36
PID 1120 wrote to memory of 2116	1120	remcos.exe	36
PID 1120 wrote to memory of 1304	1120	remcos.exe	38
PID 1120 wrote to memory of 1304	1120	remcos.exe	38
PID 1120 wrote to memory of 1304	1120	remcos.exe	38
PID 1120 wrote to memory of 1304	1120	remcos.exe	38
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	remcos.exe	40
PID 1120 wrote to memory of 2888	1120	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:2728
- 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:2816
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp94D0.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2684
- 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:2144
- - 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:1120
  - - 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:2116
  - - C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC81F.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1304
  - - 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:2888

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

Loading Replay Monitor...

Downloads

C:\ProgramData\Remcos\logs.dat

Filesize
144B

MD5
28d86988259e3163f9fcb45ce4b72711

SHA1
14a5ef79fc0df9c7b7707596bbc2d17cbf06e04c

SHA256
05563b683681303ae18fa11db2a9c81b4182930ca47425abf143e8e529385ff8

SHA512
a5283215952a34ef2cee7e06e62faac7e2f9d7b4aa3adb23607fede4f4cb54ec2e6bd87048a39faee493b3711f53e55e58fa3394d99df3b3d7cf1ca50b9029e5

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

Filesize
1017KB

MD5
673d693b0c8b68503d64ed15fd863d61

SHA1
4fb6b11e933354b9f7c5bda096543a5d6b56ff83

SHA256
a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4

SHA512
3996083d6b2f207e742a81a1dd11277c1bdb2631438a0ee72eeec88a57ff39fb2a7c9a100b30bc2839519c3019129d2157e89d6ade8cc326c4073daf4cc2bd27

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp94D0.tmp

Filesize
1KB

MD5
3d2fd6e55c7b164b937c2422df310cbb

SHA1
0f551f495a4a1589053a0fa21fd596ffdd79cc9b

SHA256
3797357d8bc5b342ef6f78d84c14e3d56e9c594c83a423cefa7f29b1e2480a81

SHA512
6627e56661196d7657baec28687528a6eca43c3da9426dafa68d1fc08a45a90f3f1d637aba247f37f361ce032413eeddc108b1cc3c9ed47a3f5d442de58552b2

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

Filesize
7KB

MD5
1401088bab9a18e95c7e9fbd72e52191

SHA1
6dd273fdd354c92e2e40d67c8579b482b1e8034f

SHA256
d1077ef7d525a493dd4b4405a1b1a6f6a71cbc665275675aeedad2a90822ac3e

SHA512
c33d0a68e5d94b94b01e7abc3e32aef8a82563d94e655fe2d25311aeec842ab6fc87e101bd96f892e0531e8899f350b5c54583de9aa2c1d45b17074f65d152f9

Download Submit
memory/1120-41-0x0000000000E90000-0x0000000000F94000-memory.dmp

Filesize
1.0MB

Download
memory/2144-28-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2144-32-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2144-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2144-31-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2144-26-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2144-22-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2144-20-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2144-18-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2144-16-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2144-25-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2144-14-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2728-1-0x0000000001030000-0x0000000001134000-memory.dmp

Filesize
1.0MB

Download
memory/2728-4-0x0000000073F4E000-0x0000000073F4F000-memory.dmp

Filesize
4KB

Download
memory/2728-5-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2728-6-0x0000000005BF0000-0x0000000005CB0000-memory.dmp

Filesize
768KB

Download
memory/2728-34-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2728-3-0x00000000006E0000-0x00000000006FE000-memory.dmp

Filesize
120KB

Download
memory/2728-2-0x0000000073F40000-0x000000007462E000-memory.dmp

Filesize
6.9MB

Download
memory/2728-0-0x0000000073F4E000-0x0000000073F4F000-memory.dmp

Filesize
4KB

Download
memory/2888-69-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-87-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-65-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2888-73-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-74-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-75-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-77-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-78-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-80-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-81-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-83-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-84-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-86-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-68-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-72-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-89-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-90-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-92-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-93-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-95-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-96-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-98-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-99-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-100-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-102-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download
memory/2888-103-0x0000000000400000-0x0000000000482000-memory.dmp

Filesize
520KB

Download