Analysis
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max time kernel
149s -
max time network
150s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
04-06-2024 22:35
Behavioral task
behavioral1
Sample
xtuHcaTJtwiA.exe
Resource
win7-20240221-en
Behavioral task
behavioral2
Sample
xtuHcaTJtwiA.exe
Resource
win10v2004-20240226-en
General
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Target
xtuHcaTJtwiA.exe
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Size
469KB
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MD5
fc489aa077f6db53303bcf8d0404528a
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SHA1
bfeace1de4d3ea72b231ea4d1ebe576bc4cdf2af
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SHA256
0e43af051e536e7c731f3d856baaf644e474c4c80ea22cb0fb4386d42c2e1056
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SHA512
a1c8a0c832b1e110a75e229a4f6f37c0e9682353de574e4dcc1a0312197f22dd074f3c8ab90a09ce685b06d231e1cf80c86283e7b129531617aa1eeba0b29fa1
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SSDEEP
12288:Wmnk7iLJbpIpiRL6I2WhSKQ9ZsfZQSDn9:uiLJbpI7I2WhQqZ7D9
Malware Config
Extracted
remcos
RemoteHost
pedrocachs.blogdns.com:1000
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audio_folder
MicRecords
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audio_record_time
5
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connect_delay
0
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connect_interval
1
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copy_file
remcos.exe
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copy_folder
Remcos
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delete_file
false
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hide_file
false
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hide_keylog_file
false
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install_flag
true
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
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keylog_folder
remcos
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mouse_option
false
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mutex
Rmc-OC07GB
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screenshot_crypt
false
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screenshot_flag
false
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screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
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startup_value
Remcos
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
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Adds policy Run key to start application 2 TTPs 4 IoCs
Processes:
xtuHcaTJtwiA.exeremcos.exedescription ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run xtuHcaTJtwiA.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" xtuHcaTJtwiA.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:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe -
Executes dropped EXE 1 IoCs
Processes:
remcos.exepid Process 2600 remcos.exe -
Loads dropped DLL 2 IoCs
Processes:
cmd.exepid Process 2608 cmd.exe 2608 cmd.exe -
Adds Run key to start application 2 TTPs 4 IoCs
Processes:
remcos.exextuHcaTJtwiA.exedescription ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" xtuHcaTJtwiA.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" xtuHcaTJtwiA.exe Set value (str) \REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\Remcos = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe -
Drops file in Windows directory 1 IoCs
Processes:
dxdiag.exedescription ioc Process File opened for modification C:\Windows\INF\setupapi.app.log dxdiag.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Modifies registry class 34 IoCs
Processes:
dxdiag.exedescription ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B} dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A65B8071-3BFE-4213-9A5B-491DA4461CA7} dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject.1\CLSID\ = "{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}" dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject\ = "DxDiagClassObject Class" dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject\CLSID\ = "{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}" dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\InprocServer32\ = "C:\\Windows\\SysWOW64\\dxdiagn.dll" dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagProvider.1\CLSID dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagProvider dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A65B8071-3BFE-4213-9A5B-491DA4461CA7}\VersionIndependentProgID dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject\CLSID dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject\CurVer\ = "DxDiag.DxDiagClassObject.1" dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\ProgID dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\VersionIndependentProgID\ = "DxDiag.DxDiagClassObject" dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject.1\CLSID dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\ForceRemove dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\InprocServer32 dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagProvider\CLSID dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagProvider\ = "DxDiagProvider Class" dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagProvider\CurVer\ = "DxDiag.DxDiagClassObject.1" dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject\CurVer dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\VersionIndependentProgID dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\InprocServer32\ThreadingModel = "Apartment" dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagProvider.1\ = "DxDiagProvider Class" dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject.1 dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagProvider.1 dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A65B8071-3BFE-4213-9A5B-491DA4461CA7}\ProgID dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\ForceRemove\ = "Programmable" dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagProvider\CurVer dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{A65B8071-3BFE-4213-9A5B-491DA4461CA7}\InprocServer32 dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject.1\ = "DxDiagClassObject Class" dxdiag.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\DxDiag.DxDiagClassObject dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\ = "DxDiagClassObject Class" dxdiag.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{EEB1CAE3-D0B2-446E-AEDE-727AA9089A1B}\ProgID\ = "DxDiag.DxDiagClassObject.1" dxdiag.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
dxdiag.exepid Process 2452 dxdiag.exe 2452 dxdiag.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
remcos.exepid Process 2600 remcos.exe -
Suspicious use of AdjustPrivilegeToken 7 IoCs
Processes:
dxdiag.exedescription pid Process Token: SeRestorePrivilege 2452 dxdiag.exe Token: SeRestorePrivilege 2452 dxdiag.exe Token: SeRestorePrivilege 2452 dxdiag.exe Token: SeRestorePrivilege 2452 dxdiag.exe Token: SeRestorePrivilege 2452 dxdiag.exe Token: SeRestorePrivilege 2452 dxdiag.exe Token: SeRestorePrivilege 2452 dxdiag.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
dxdiag.exepid Process 2452 dxdiag.exe -
Suspicious use of WriteProcessMemory 16 IoCs
Processes:
xtuHcaTJtwiA.exeWScript.execmd.exeremcos.exedescription pid Process procid_target PID 1728 wrote to memory of 1044 1728 xtuHcaTJtwiA.exe 28 PID 1728 wrote to memory of 1044 1728 xtuHcaTJtwiA.exe 28 PID 1728 wrote to memory of 1044 1728 xtuHcaTJtwiA.exe 28 PID 1728 wrote to memory of 1044 1728 xtuHcaTJtwiA.exe 28 PID 1044 wrote to memory of 2608 1044 WScript.exe 29 PID 1044 wrote to memory of 2608 1044 WScript.exe 29 PID 1044 wrote to memory of 2608 1044 WScript.exe 29 PID 1044 wrote to memory of 2608 1044 WScript.exe 29 PID 2608 wrote to memory of 2600 2608 cmd.exe 31 PID 2608 wrote to memory of 2600 2608 cmd.exe 31 PID 2608 wrote to memory of 2600 2608 cmd.exe 31 PID 2608 wrote to memory of 2600 2608 cmd.exe 31 PID 2600 wrote to memory of 2452 2600 remcos.exe 33 PID 2600 wrote to memory of 2452 2600 remcos.exe 33 PID 2600 wrote to memory of 2452 2600 remcos.exe 33 PID 2600 wrote to memory of 2452 2600 remcos.exe 33
Processes
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C:\Users\Admin\AppData\Local\Temp\xtuHcaTJtwiA.exe"C:\Users\Admin\AppData\Local\Temp\xtuHcaTJtwiA.exe"1⤵
- Adds policy Run key to start application
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:1728 -
C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"2⤵
- Suspicious use of WriteProcessMemory
PID:1044 -
C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c "C:\ProgramData\Remcos\remcos.exe"3⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:2608 -
C:\ProgramData\Remcos\remcos.exeC:\ProgramData\Remcos\remcos.exe4⤵
- Adds policy Run key to start application
- Executes dropped EXE
- Adds Run key to start application
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of WriteProcessMemory
PID:2600 -
C:\Windows\SysWOW64\dxdiag.exe"C:\Windows\System32\dxdiag.exe" /t C:\Users\Admin\AppData\Local\Temp\sysinfo.txt5⤵
- Drops file in Windows directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2452
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
469KB
MD5fc489aa077f6db53303bcf8d0404528a
SHA1bfeace1de4d3ea72b231ea4d1ebe576bc4cdf2af
SHA2560e43af051e536e7c731f3d856baaf644e474c4c80ea22cb0fb4386d42c2e1056
SHA512a1c8a0c832b1e110a75e229a4f6f37c0e9682353de574e4dcc1a0312197f22dd074f3c8ab90a09ce685b06d231e1cf80c86283e7b129531617aa1eeba0b29fa1
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Filesize
386B
MD51ec6289c6fd4c2ded6b2836ed28cbeb5
SHA1c4e08195e6c640eb8860acc03fda1d649b4fe070
SHA2566efdc40f9eb217f879607614e928b65bff759e424f3efb31faceb2a043c32dc2
SHA51220bc46f4dee22f75f15c402c7c2eaee60fff7dd92548050585571dcbefd59485cc249c06bc3f1aac7a138e5ae67c0c3918b46ffa24c8b0f1b092e2f6b6e21288
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Filesize
15KB
MD5e2e774cebfdd0e896b0f9a37066b434f
SHA1b68a6662ed196e03f01c9805c6eb65c3cab22891
SHA256e0b08f10fe765187e42967de81003628ddc5435cfb3c7f00dcba60c54dbdef19
SHA512b5720651078cdc2e156bdd39dc45e568233ea001ba2a919c4ff7d2689a6543011382ac11cbe228c4aa5ea2b2253a9ff52230065d67f37dd39bef4b7ca82054ab