remcos | c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7e

General

Target

c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
Size

92KB
MD5

5f97a361c6788f688041e6f2f8d71a30
SHA1

7da8b79565e305a3d197fad69a61620686cd5fbc
SHA256

c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7e
SHA512

2f115534b0decf5eaa83457ed52315fc724b574221ff478f170789376ec7d1f3811862c15da12e44e2fc7ce0a9cbe51708c0bd5b71a5d92118cc7d4f2ebe1505
SSDEEP

1536:4hhW0YTGZWdVseJxaM9kraLdV2QkQ1TbPX8IHOCkIsI4ESHNTh9E+JP19qkP6vrK:ehzYTGWVvJ8f2v1TbPzuMsIFSHNThy+F

Score

10^/10

remcos host discovery evasion persistence rat trojan

Malware Config

Extracted

Family

remcos

Version

1.7 Pro

Botnet

Host

C2

nhatde0166-47406.portmap.host:47406

Attributes

audio_folder
audio
audio_path
%AppData%
audio_record_time
5
connect_delay
0
connect_interval
5
copy_file
remcos.exe
copy_folder
remcos
delete_file
true
hide_file
true
hide_keylog_file
true
install_flag
true
install_path
%WinDir%\System32
keylog_crypt
true
keylog_file
logs.dat
keylog_flag
false
keylog_folder
remcos
keylog_path
%WinDir%\System32
mouse_option
false
mutex
remcos_whmmzkguja
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screens
screenshot_path
%AppData%
screenshot_time
1
startup_value
remcos
take_screenshot_option
false
take_screenshot_time
5

Signatures

Modifies WinLogon for persistence 2 TTPs 4 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\system32\\userinit.exe, \"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell = "explorer.exe, \"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit = "C:\\WINDOWS\\system32\\userinit.exe, \"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	remcos.exe

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

UAC bypass 3 TTPs 2 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	reg.exe

Adds policy 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\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\remcos = "\"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	remcos.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\remcos = "\"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	remcos.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\Control Panel\International\Geo\Nation	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe

Executes dropped EXE 1 IoCs

pid	Process
1620	remcos.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\remcos = "\"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	remcos.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-940901362-3608833189-1915618603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\remcos = "\"C:\\Windows\\SysWOW64\\remcos\\remcos.exe\""	remcos.exe

Modifies WinLogon 2 TTPs 2 IoCs

persistence

Winlogon Helper DLL

T1547.004

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\	remcos.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\remcos\remcos.exe	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
File opened for modification	C:\Windows\SysWOW64\remcos\remcos.exe	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
File opened for modification	C:\Windows\SysWOW64\remcos	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
File opened for modification	C:\Windows\SysWOW64\remcos\logs.dat	remcos.exe
File created	C:\Windows\SysWOW64\remcos\logs.dat	remcos.exe

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	PING.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	remcos.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

Adversaries may check for Internet connectivity on compromised systems.

discovery

Internet Connection Discovery

T1016.001

pid	Process
264	PING.EXE

Modifies registry key 1 TTPs 2 IoCs

Modify Registry

T1112

pid	Process
664	reg.exe
3772	reg.exe

Runs ping.exe 1 TTPs 1 IoCs

Remote System Discovery

T1018

pid	Process
264	PING.EXE

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1620	remcos.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 3432 wrote to memory of 1700	3432	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe	83
PID 3432 wrote to memory of 1700	3432	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe	83
PID 3432 wrote to memory of 1700	3432	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe	83
PID 1700 wrote to memory of 664	1700	cmd.exe	85
PID 1700 wrote to memory of 664	1700	cmd.exe	85
PID 1700 wrote to memory of 664	1700	cmd.exe	85
PID 3432 wrote to memory of 400	3432	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe	86
PID 3432 wrote to memory of 400	3432	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe	86
PID 3432 wrote to memory of 400	3432	c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe	86
PID 400 wrote to memory of 264	400	cmd.exe	88
PID 400 wrote to memory of 264	400	cmd.exe	88
PID 400 wrote to memory of 264	400	cmd.exe	88
PID 400 wrote to memory of 1620	400	cmd.exe	89
PID 400 wrote to memory of 1620	400	cmd.exe	89
PID 400 wrote to memory of 1620	400	cmd.exe	89
PID 1620 wrote to memory of 2936	1620	remcos.exe	90
PID 1620 wrote to memory of 2936	1620	remcos.exe	90
PID 1620 wrote to memory of 2936	1620	remcos.exe	90
PID 1620 wrote to memory of 184	1620	remcos.exe	91
PID 1620 wrote to memory of 184	1620	remcos.exe	91
PID 1620 wrote to memory of 184	1620	remcos.exe	91
PID 2936 wrote to memory of 3772	2936	cmd.exe	93
PID 2936 wrote to memory of 3772	2936	cmd.exe	93
PID 2936 wrote to memory of 3772	2936	cmd.exe	93

C:\Users\Admin\AppData\Local\Temp\c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe
"C:\Users\Admin\AppData\Local\Temp\c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7eN.exe"
1⤵
- Modifies WinLogon for persistence
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- Modifies WinLogon
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3432
- C:\Windows\SysWOW64\cmd.exe
  /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1700
- - C:\Windows\SysWOW64\reg.exe
    C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    - System Location Discovery: System Language Discovery
    - Modifies registry key
    PID:664
- C:\Windows\SysWOW64\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\install.bat" "
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:400
- - C:\Windows\SysWOW64\PING.EXE
    PING 127.0.0.1 -n 2
    3⤵
    - System Location Discovery: System Language Discovery
    - System Network Configuration Discovery: Internet Connection Discovery
    - Runs ping.exe
    PID:264
- - C:\Windows\SysWOW64\remcos\remcos.exe
    "C:\Windows\SysWOW64\remcos\remcos.exe"
    3⤵
    - Modifies WinLogon for persistence
    - Adds policy Run key to start application
    - Executes dropped EXE
    - Adds Run key to start application
    - Modifies WinLogon
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious use of SetWindowsHookEx
    - Suspicious use of WriteProcessMemory
    PID:1620
  - - C:\Windows\SysWOW64\cmd.exe
      /k %windir%\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
      4⤵
      System Location Discovery: System Language Discovery
      Suspicious use of WriteProcessMemory
      PID:2936
    - - C:\Windows\SysWOW64\reg.exe
        
        C:\Windows\System32\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System /v EnableLUA /t REG_DWORD /d 0 /f
        5⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:3772
  - - C:\Program Files (x86)\Internet Explorer\iexplore.exe
      "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
      4⤵
      PID:184

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

4

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

2

T1547.004

Privilege Escalation

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Boot or Logon Autostart Execution

4

T1547

Registry Run Keys / Startup Folder

2

T1547.001

Winlogon Helper DLL

2

T1547.004

Defense Evasion

Abuse Elevation Control Mechanism

1

T1548

Bypass User Account Control

1

T1548.002

Impair Defenses

1

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry

1

T1012

Remote System Discovery

1

T1018

System Information Discovery

2

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

System Network Configuration Discovery

1

T1016

Internet Connection Discovery

1

T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\install.bat

Filesize
199B

MD5
ab5e6b2c726d323c6a2bd81a044ed95b

SHA1
fbb319baf529104937ed5cfe7e1b502acd02d5f5

SHA256
9977eb7bb04d5ed50e59880e1f0b1b6cb3d6f36f640d970924e80824bc94e702

SHA512
84f46791333264b8f28b9e2e82aaaf8dc0ead4a3be6376a2bc6332c20a5e65bb00e120e558f4614e33801e00ed02d5b5220a7a3961e4da89b14279fdcc8cc80f

Download Submit
C:\Windows\SysWOW64\remcos\remcos.exe

Filesize
92KB

MD5
5f97a361c6788f688041e6f2f8d71a30

SHA1
7da8b79565e305a3d197fad69a61620686cd5fbc

SHA256
c5192ad14f3129e8c70a1c6d59b78dc6e49a29f592e85bebd372c731f84b9c7e

SHA512
2f115534b0decf5eaa83457ed52315fc724b574221ff478f170789376ec7d1f3811862c15da12e44e2fc7ce0a9cbe51708c0bd5b71a5d92118cc7d4f2ebe1505

Download Submit

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads