remcos | 7422bc2c77e70c2e90c27d030a13eb3adf0bcfc1ef2bc55b62871181af5cd955

Analysis

max time kernel
149s
max time network
144s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
24/01/2025, 07:01

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General

Target

ApiUpdater.exe
Size

469KB
MD5

ebf341ab1088ab009a9f9cf06619e616
SHA1

a31d5650c010c421fa81733e4841cf1b52d607d9
SHA256

7422bc2c77e70c2e90c27d030a13eb3adf0bcfc1ef2bc55b62871181af5cd955
SHA512

40c1481642f8ad2fed9514d0968a43151a189c61e53d60990183e81c16891cdd7a0983568b2910dc8a9098a408136468cff5660d0607cf06331275937c1f60e1
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSin9:uiLJbpI7I2WhQqZ7i9

Score

10^/10

remcos remotehost defense_evasion discovery persistence rat trojan

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

else-directors.gl.at.ply.gg:56448

Attributes

audio_folder
MicRecords
audio_record_time
5
connect_delay
0
connect_interval
1
copy_file
$77-Bitdefender.exe
copy_folder
Bitdefender
delete_file
true
hide_file
true
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-Z3DS2J
screenshot_crypt
false
screenshot_flag
false
screenshot_folder
Screenshots
screenshot_path
%AppData%
screenshot_time
10
startup_value
VisualStudioServer
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

UAC bypass 3 TTPs 3 IoCs

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

Adds policy Run key to start application 2 TTPs 6 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\$77-Bitdefender.exe\""	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	ApiUpdater.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\$77-Bitdefender.exe\""	ApiUpdater.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	$77-Bitdefender.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\$77-Bitdefender.exe\""	$77-Bitdefender.exe

Deletes itself 1 IoCs

pid	Process
2788	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
2808	$77-Bitdefender.exe

Loads dropped DLL 4 IoCs

pid	Process
2716	cmd.exe
2716	cmd.exe
2808	$77-Bitdefender.exe
2808	$77-Bitdefender.exe

Adds Run key to start application 2 TTPs 6 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\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\$77-Bitdefender.exe\""	$77-Bitdefender.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\$77-Bitdefender.exe\""	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\$77-Bitdefender.exe\""	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\$77-Bitdefender.exe\""	ApiUpdater.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\$77-Bitdefender.exe\""	ApiUpdater.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\$77-Bitdefender.exe\""	$77-Bitdefender.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 2808 set thread context of 2616	2808	$77-Bitdefender.exe	38
PID 2616 set thread context of 2868	2616	iexplore.exe	43

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	ApiUpdater.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	svchost.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	$77-Bitdefender.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
2524	reg.exe
2864	reg.exe
2608	reg.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
2808	$77-Bitdefender.exe
2616	iexplore.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 2288 wrote to memory of 2340	2288	ApiUpdater.exe	30
PID 2288 wrote to memory of 2340	2288	ApiUpdater.exe	30
PID 2288 wrote to memory of 2340	2288	ApiUpdater.exe	30
PID 2288 wrote to memory of 2340	2288	ApiUpdater.exe	30
PID 2288 wrote to memory of 2340	2288	ApiUpdater.exe	30
PID 2288 wrote to memory of 2340	2288	ApiUpdater.exe	30
PID 2288 wrote to memory of 2340	2288	ApiUpdater.exe	30
PID 2340 wrote to memory of 2524	2340	cmd.exe	32
PID 2340 wrote to memory of 2524	2340	cmd.exe	32
PID 2340 wrote to memory of 2524	2340	cmd.exe	32
PID 2340 wrote to memory of 2524	2340	cmd.exe	32
PID 2340 wrote to memory of 2524	2340	cmd.exe	32
PID 2340 wrote to memory of 2524	2340	cmd.exe	32
PID 2340 wrote to memory of 2524	2340	cmd.exe	32
PID 2288 wrote to memory of 2788	2288	ApiUpdater.exe	33
PID 2288 wrote to memory of 2788	2288	ApiUpdater.exe	33
PID 2288 wrote to memory of 2788	2288	ApiUpdater.exe	33
PID 2288 wrote to memory of 2788	2288	ApiUpdater.exe	33
PID 2288 wrote to memory of 2788	2288	ApiUpdater.exe	33
PID 2288 wrote to memory of 2788	2288	ApiUpdater.exe	33
PID 2288 wrote to memory of 2788	2288	ApiUpdater.exe	33
PID 2788 wrote to memory of 2716	2788	WScript.exe	34
PID 2788 wrote to memory of 2716	2788	WScript.exe	34
PID 2788 wrote to memory of 2716	2788	WScript.exe	34
PID 2788 wrote to memory of 2716	2788	WScript.exe	34
PID 2788 wrote to memory of 2716	2788	WScript.exe	34
PID 2788 wrote to memory of 2716	2788	WScript.exe	34
PID 2788 wrote to memory of 2716	2788	WScript.exe	34
PID 2716 wrote to memory of 2808	2716	cmd.exe	36
PID 2716 wrote to memory of 2808	2716	cmd.exe	36
PID 2716 wrote to memory of 2808	2716	cmd.exe	36
PID 2716 wrote to memory of 2808	2716	cmd.exe	36
PID 2716 wrote to memory of 2808	2716	cmd.exe	36
PID 2716 wrote to memory of 2808	2716	cmd.exe	36
PID 2716 wrote to memory of 2808	2716	cmd.exe	36
PID 2808 wrote to memory of 2744	2808	$77-Bitdefender.exe	37
PID 2808 wrote to memory of 2744	2808	$77-Bitdefender.exe	37
PID 2808 wrote to memory of 2744	2808	$77-Bitdefender.exe	37
PID 2808 wrote to memory of 2744	2808	$77-Bitdefender.exe	37
PID 2808 wrote to memory of 2744	2808	$77-Bitdefender.exe	37
PID 2808 wrote to memory of 2744	2808	$77-Bitdefender.exe	37
PID 2808 wrote to memory of 2744	2808	$77-Bitdefender.exe	37
PID 2808 wrote to memory of 2616	2808	$77-Bitdefender.exe	38
PID 2808 wrote to memory of 2616	2808	$77-Bitdefender.exe	38
PID 2808 wrote to memory of 2616	2808	$77-Bitdefender.exe	38
PID 2808 wrote to memory of 2616	2808	$77-Bitdefender.exe	38
PID 2808 wrote to memory of 2616	2808	$77-Bitdefender.exe	38
PID 2808 wrote to memory of 2616	2808	$77-Bitdefender.exe	38
PID 2808 wrote to memory of 2616	2808	$77-Bitdefender.exe	38
PID 2808 wrote to memory of 2616	2808	$77-Bitdefender.exe	38
PID 2616 wrote to memory of 2644	2616	iexplore.exe	40
PID 2616 wrote to memory of 2644	2616	iexplore.exe	40
PID 2616 wrote to memory of 2644	2616	iexplore.exe	40
PID 2616 wrote to memory of 2644	2616	iexplore.exe	40
PID 2616 wrote to memory of 2644	2616	iexplore.exe	40
PID 2616 wrote to memory of 2644	2616	iexplore.exe	40
PID 2616 wrote to memory of 2644	2616	iexplore.exe	40
PID 2744 wrote to memory of 2864	2744	cmd.exe	41
PID 2744 wrote to memory of 2864	2744	cmd.exe	41
PID 2744 wrote to memory of 2864	2744	cmd.exe	41
PID 2744 wrote to memory of 2864	2744	cmd.exe	41
PID 2744 wrote to memory of 2864	2744	cmd.exe	41
PID 2744 wrote to memory of 2864	2744	cmd.exe	41
PID 2744 wrote to memory of 2864	2744	cmd.exe	41

C:\Users\Admin\AppData\Local\Temp\ApiUpdater.exe
"C:\Users\Admin\AppData\Local\Temp\ApiUpdater.exe"
1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2288
- 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:2340
- - 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:2524
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2788
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Bitdefender\$77-Bitdefender.exe"
    3⤵
    - Loads dropped DLL
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2716
  - - C:\ProgramData\Bitdefender\$77-Bitdefender.exe
      C:\ProgramData\Bitdefender\$77-Bitdefender.exe
      4⤵
      Adds policy Run key to start application
      Executes dropped EXE
      Loads dropped DLL
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:2808
    - - 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
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:2744
      - 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
        6⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:2864
    - - \??\c:\program files (x86)\internet explorer\iexplore.exe
        
        "c:\program files (x86)\internet explorer\iexplore.exe"
        5⤵
        Adds policy Run key to start application
        Adds Run key to start application
        Suspicious use of SetThreadContext
        System Location Discovery: System Language Discovery
        Suspicious behavior: MapViewOfSection
        Suspicious use of WriteProcessMemory
        
        PID:2616
      - 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
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:2644
        
        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
        7⤵
        UAC bypass
        System Location Discovery: System Language Discovery
        Modifies registry key
        
        PID:2608
      - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:2868

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

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

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Downloads

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

Filesize
546B

MD5
b589da137125da0d605bf425b360e9b7

SHA1
091b07b800133033ba4ba930a7acb4559c0df6f5

SHA256
a9b357b7a182158e54e22ce3e78a6ffaaa5bb25b08717d69d591a92429d39bac

SHA512
2bf73d9c2f573c714f7325d6ca279c0c1b2b8e90b7457caafa6174319df0490710affc25b6c185e5730bfd31c9e0539e51e35ac625a5c6d990ca8552e3a53de0

Download Submit
\ProgramData\Bitdefender\$77-Bitdefender.exe

Filesize
469KB

MD5
ebf341ab1088ab009a9f9cf06619e616

SHA1
a31d5650c010c421fa81733e4841cf1b52d607d9

SHA256
7422bc2c77e70c2e90c27d030a13eb3adf0bcfc1ef2bc55b62871181af5cd955

SHA512
40c1481642f8ad2fed9514d0968a43151a189c61e53d60990183e81c16891cdd7a0983568b2910dc8a9098a408136468cff5660d0607cf06331275937c1f60e1

Download Submit
memory/2616-26-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-32-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-14-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2616-17-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-37-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-36-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-35-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-34-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-28-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-16-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-27-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-25-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-29-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-30-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-31-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-13-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2616-33-0x0000000000090000-0x000000000010F000-memory.dmp

Filesize
508KB

Download
memory/2868-20-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2868-21-0x0000000000160000-0x00000000001DF000-memory.dmp

Filesize
508KB

Download
memory/2868-22-0x0000000000160000-0x00000000001DF000-memory.dmp

Filesize
508KB

Download
memory/2868-24-0x0000000000160000-0x00000000001DF000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads