remcos | 8c7a4657ea68a69f364c8acb1881aa6e0f8140d3aba9a917f484ba6ec705db21

Analysis

max time kernel
150s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
20/11/2024, 10:49

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General

Target

QD0FZ_stub.exe
Size

469KB
MD5

e7be6cad5e537ccd392c2a1aefa60ee7
SHA1

324b9688a5d8c39f5e96e41f451cfc9a225d48d2
SHA256

8c7a4657ea68a69f364c8acb1881aa6e0f8140d3aba9a917f484ba6ec705db21
SHA512

0fc526f228ace907e580433d7e85e170ebfdc1eae24cf21d2e35568007f30abf517de2c215b1718ed31787e0ebfdafd89f11e6214f09f01492f75fe209c09037
SSDEEP

12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQS0n9:uiLJbpI7I2WhQqZ709

Score

10^/10

remcos remotehost discovery evasion 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
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-XTM51M
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

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
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\Bitdefender.exe\""	QD0FZ_stub.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	Bitdefender.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\Bitdefender.exe\""	Bitdefender.exe
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\\Bitdefender.exe\""	iexplore.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run	QD0FZ_stub.exe

Checks computer location settings 2 TTPs 2 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-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	QD0FZ_stub.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	WScript.exe

Deletes itself 1 IoCs

pid	Process
692	WScript.exe

Executes dropped EXE 1 IoCs

pid	Process
264	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\\Bitdefender.exe\""	Bitdefender.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\Bitdefender.exe\""	iexplore.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\Bitdefender.exe\""	iexplore.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\Bitdefender.exe\""	QD0FZ_stub.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\Bitdefender.exe\""	QD0FZ_stub.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VisualStudioServer = "\"C:\\ProgramData\\Bitdefender\\Bitdefender.exe\""	Bitdefender.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 264 set thread context of 4112	264	Bitdefender.exe	92
PID 4112 set thread context of 1192	4112	iexplore.exe	95

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 11 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	QD0FZ_stub.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Bitdefender.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
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	reg.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WScript.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iexplore.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000_Classes\Local Settings	QD0FZ_stub.exe

Modifies registry key 1 TTPs 3 IoCs

Modify Registry

T1112

pid	Process
2576	reg.exe
1820	reg.exe
4648	reg.exe

Suspicious behavior: MapViewOfSection 2 IoCs

pid	Process
264	Bitdefender.exe
4112	iexplore.exe

Suspicious use of WriteProcessMemory 35 IoCs

description	pid	Process	procid_target
PID 3588 wrote to memory of 3520	3588	QD0FZ_stub.exe	84
PID 3588 wrote to memory of 3520	3588	QD0FZ_stub.exe	84
PID 3588 wrote to memory of 3520	3588	QD0FZ_stub.exe	84
PID 3520 wrote to memory of 2576	3520	cmd.exe	86
PID 3520 wrote to memory of 2576	3520	cmd.exe	86
PID 3520 wrote to memory of 2576	3520	cmd.exe	86
PID 3588 wrote to memory of 692	3588	QD0FZ_stub.exe	87
PID 3588 wrote to memory of 692	3588	QD0FZ_stub.exe	87
PID 3588 wrote to memory of 692	3588	QD0FZ_stub.exe	87
PID 692 wrote to memory of 2124	692	WScript.exe	88
PID 692 wrote to memory of 2124	692	WScript.exe	88
PID 692 wrote to memory of 2124	692	WScript.exe	88
PID 2124 wrote to memory of 264	2124	cmd.exe	90
PID 2124 wrote to memory of 264	2124	cmd.exe	90
PID 2124 wrote to memory of 264	2124	cmd.exe	90
PID 264 wrote to memory of 2616	264	Bitdefender.exe	91
PID 264 wrote to memory of 2616	264	Bitdefender.exe	91
PID 264 wrote to memory of 2616	264	Bitdefender.exe	91
PID 264 wrote to memory of 4112	264	Bitdefender.exe	92
PID 264 wrote to memory of 4112	264	Bitdefender.exe	92
PID 264 wrote to memory of 4112	264	Bitdefender.exe	92
PID 264 wrote to memory of 4112	264	Bitdefender.exe	92
PID 4112 wrote to memory of 2216	4112	iexplore.exe	94
PID 4112 wrote to memory of 2216	4112	iexplore.exe	94
PID 4112 wrote to memory of 2216	4112	iexplore.exe	94
PID 4112 wrote to memory of 1192	4112	iexplore.exe	95
PID 4112 wrote to memory of 1192	4112	iexplore.exe	95
PID 4112 wrote to memory of 1192	4112	iexplore.exe	95
PID 4112 wrote to memory of 1192	4112	iexplore.exe	95
PID 2616 wrote to memory of 1820	2616	cmd.exe	97
PID 2616 wrote to memory of 1820	2616	cmd.exe	97
PID 2616 wrote to memory of 1820	2616	cmd.exe	97
PID 2216 wrote to memory of 4648	2216	cmd.exe	98
PID 2216 wrote to memory of 4648	2216	cmd.exe	98
PID 2216 wrote to memory of 4648	2216	cmd.exe	98

C:\Users\Admin\AppData\Local\Temp\QD0FZ_stub.exe
"C:\Users\Admin\AppData\Local\Temp\QD0FZ_stub.exe"
1⤵
- Adds policy Run key to start application
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:3588
- 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:3520
- - 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:2576
- C:\Windows\SysWOW64\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"
  2⤵
  - Checks computer location settings
  - Deletes itself
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:692
- - C:\Windows\SysWOW64\cmd.exe
    "C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Bitdefender\Bitdefender.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:2124
  - - C:\ProgramData\Bitdefender\Bitdefender.exe
      C:\ProgramData\Bitdefender\Bitdefender.exe
      4⤵
      Adds policy Run key to start application
      Executes dropped EXE
      Adds Run key to start application
      Suspicious use of SetThreadContext
      System Location Discovery: System Language Discovery
      Suspicious behavior: MapViewOfSection
      Suspicious use of WriteProcessMemory
      PID:264
    - - 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:2616
      - 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:1820
    - - \??\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:4112
      - 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
        Suspicious use of WriteProcessMemory
        
        PID:2216
        
        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:4648
      - C:\Windows\SysWOW64\svchost.exe
        
        svchost.exe
        6⤵
        
        PID:1192

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

Query Registry

T1012

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:\ProgramData\Bitdefender\Bitdefender.exe

Filesize
469KB

MD5
e7be6cad5e537ccd392c2a1aefa60ee7

SHA1
324b9688a5d8c39f5e96e41f451cfc9a225d48d2

SHA256
8c7a4657ea68a69f364c8acb1881aa6e0f8140d3aba9a917f484ba6ec705db21

SHA512
0fc526f228ace907e580433d7e85e170ebfdc1eae24cf21d2e35568007f30abf517de2c215b1718ed31787e0ebfdafd89f11e6214f09f01492f75fe209c09037

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

Filesize
538B

MD5
0d300850c4b872ee0997c0714d8946f8

SHA1
c63b8f1a899b32bfb76555c22e3d91f6cb801256

SHA256
025c871f620d631d578513c4dea28a0870ce306eb90ba2e19ef8ca641ba20ed9

SHA512
ac704d9db7c78b12051e919d9b15d63bf62c2c0ed01ebe2a824a545df44c47fb0ed80af647a77c25ffa4fe1ade7c01151e8ac187118c15b6dbfbea3ce36ff7da

Download Submit
memory/1192-14-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/1192-15-0x0000000000400000-0x000000000047F000-memory.dmp

Filesize
508KB

Download
memory/4112-19-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-22-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-10-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-16-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-17-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-18-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-9-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-20-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-21-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-11-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-23-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-24-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-25-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-26-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-27-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-28-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-29-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download
memory/4112-30-0x0000000000800000-0x000000000087F000-memory.dmp

Filesize
508KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads