Analysis
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max time kernel
150s -
max time network
128s -
platform
windows10-2004_x64 -
resource
win10v2004-20220721-en -
resource tags
arch:x64arch:x86image:win10v2004-20220721-enlocale:en-usos:windows10-2004-x64system -
submitted
28-07-2022 16:43
Static task
static1
Behavioral task
behavioral1
Sample
90b7fc34be5837101ff125bdbe99806a.exe
Resource
win7-20220718-en
Behavioral task
behavioral2
Sample
90b7fc34be5837101ff125bdbe99806a.exe
Resource
win10v2004-20220721-en
General
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Target
90b7fc34be5837101ff125bdbe99806a.exe
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Size
860KB
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MD5
90b7fc34be5837101ff125bdbe99806a
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SHA1
43a733cb58aaefffefec0720f1b93dae766a09e1
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SHA256
703b4d505cd05c228e0cf681a542262dc98211cf2e4eb26102283b5b7efa29ee
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SHA512
dd590eaad5b95ac4b703d5c36a367fc0517d33408b8f35218a341710411931bac51b97d3f12cbf26e1ba5deacaf8b3ae7390f108524f9a43b5bad3c8e2689658
Malware Config
Extracted
remcos
XP
xpremcuz300622.ddns.net:3542
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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
oos.exe
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delete_file
false
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hide_file
true
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hide_keylog_file
false
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install_flag
true
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install_path
%AppData%
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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
Remcos-MMP2I7
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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
kkl
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
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Executes dropped EXE 2 IoCs
Processes:
oos.exeoos.exepid process 4512 oos.exe 1476 oos.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
90b7fc34be5837101ff125bdbe99806a.exeWScript.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation 90b7fc34be5837101ff125bdbe99806a.exe Key value queried \REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Control Panel\International\Geo\Nation WScript.exe -
Adds Run key to start application 2 TTPs 8 IoCs
Processes:
oos.exe90b7fc34be5837101ff125bdbe99806a.exedescription ioc process Set value (str) \REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" oos.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ oos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" oos.exe Key created \REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Software\Microsoft\Windows\CurrentVersion\Run\ 90b7fc34be5837101ff125bdbe99806a.exe Set value (str) \REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" 90b7fc34be5837101ff125bdbe99806a.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ 90b7fc34be5837101ff125bdbe99806a.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" 90b7fc34be5837101ff125bdbe99806a.exe Key created \REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000\Software\Microsoft\Windows\CurrentVersion\Run\ oos.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
90b7fc34be5837101ff125bdbe99806a.exeoos.exedescription pid process target process PID 1440 set thread context of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 4512 set thread context of 1476 4512 oos.exe oos.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
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Modifies registry class 1 IoCs
Processes:
90b7fc34be5837101ff125bdbe99806a.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2660308776-3705150086-26593515-1000_Classes\Local Settings 90b7fc34be5837101ff125bdbe99806a.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
oos.exepid process 1476 oos.exe -
Suspicious use of WriteProcessMemory 33 IoCs
Processes:
90b7fc34be5837101ff125bdbe99806a.exe90b7fc34be5837101ff125bdbe99806a.exeWScript.execmd.exeoos.exedescription pid process target process PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1440 wrote to memory of 1516 1440 90b7fc34be5837101ff125bdbe99806a.exe 90b7fc34be5837101ff125bdbe99806a.exe PID 1516 wrote to memory of 1764 1516 90b7fc34be5837101ff125bdbe99806a.exe WScript.exe PID 1516 wrote to memory of 1764 1516 90b7fc34be5837101ff125bdbe99806a.exe WScript.exe PID 1516 wrote to memory of 1764 1516 90b7fc34be5837101ff125bdbe99806a.exe WScript.exe PID 1764 wrote to memory of 4208 1764 WScript.exe cmd.exe PID 1764 wrote to memory of 4208 1764 WScript.exe cmd.exe PID 1764 wrote to memory of 4208 1764 WScript.exe cmd.exe PID 4208 wrote to memory of 4512 4208 cmd.exe oos.exe PID 4208 wrote to memory of 4512 4208 cmd.exe oos.exe PID 4208 wrote to memory of 4512 4208 cmd.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe PID 4512 wrote to memory of 1476 4512 oos.exe oos.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\90b7fc34be5837101ff125bdbe99806a.exe"C:\Users\Admin\AppData\Local\Temp\90b7fc34be5837101ff125bdbe99806a.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\90b7fc34be5837101ff125bdbe99806a.exe"C:\Users\Admin\AppData\Local\Temp\90b7fc34be5837101ff125bdbe99806a.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Modifies registry class
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\install.vbs"3⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c "C:\Users\Admin\AppData\Roaming\oos.exe"4⤵
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\oos.exeC:\Users\Admin\AppData\Roaming\oos.exe5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Roaming\oos.exe"C:\Users\Admin\AppData\Roaming\oos.exe"6⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetWindowsHookEx
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Local\Temp\install.vbsFilesize
398B
MD5a5d3440f90cbfae712166e20870eaed7
SHA1cc1e1a2945eb2ad475234344f7527ad9e9873647
SHA256960a570da95b8d16809cbcc18e8ca4d81e16cb666354ddc1d572daf93f291f02
SHA512d3136a280fbb326ccc5cb5ab1214aed8ccd6baa7f3f89ef9e0b5bf391a957dab2c121640bb056e6cbda0594f83133c4dbb4e1e2f0e290b44a401cd2cf8cfd4aa
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
860KB
MD590b7fc34be5837101ff125bdbe99806a
SHA143a733cb58aaefffefec0720f1b93dae766a09e1
SHA256703b4d505cd05c228e0cf681a542262dc98211cf2e4eb26102283b5b7efa29ee
SHA512dd590eaad5b95ac4b703d5c36a367fc0517d33408b8f35218a341710411931bac51b97d3f12cbf26e1ba5deacaf8b3ae7390f108524f9a43b5bad3c8e2689658
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
860KB
MD590b7fc34be5837101ff125bdbe99806a
SHA143a733cb58aaefffefec0720f1b93dae766a09e1
SHA256703b4d505cd05c228e0cf681a542262dc98211cf2e4eb26102283b5b7efa29ee
SHA512dd590eaad5b95ac4b703d5c36a367fc0517d33408b8f35218a341710411931bac51b97d3f12cbf26e1ba5deacaf8b3ae7390f108524f9a43b5bad3c8e2689658
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
860KB
MD590b7fc34be5837101ff125bdbe99806a
SHA143a733cb58aaefffefec0720f1b93dae766a09e1
SHA256703b4d505cd05c228e0cf681a542262dc98211cf2e4eb26102283b5b7efa29ee
SHA512dd590eaad5b95ac4b703d5c36a367fc0517d33408b8f35218a341710411931bac51b97d3f12cbf26e1ba5deacaf8b3ae7390f108524f9a43b5bad3c8e2689658
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memory/1440-133-0x0000000005D90000-0x0000000006334000-memory.dmpFilesize
5.6MB
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memory/1440-130-0x0000000000330000-0x000000000040C000-memory.dmpFilesize
880KB
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memory/1440-134-0x0000000005850000-0x00000000058B6000-memory.dmpFilesize
408KB
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memory/1440-132-0x0000000005290000-0x000000000532C000-memory.dmpFilesize
624KB
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memory/1440-131-0x0000000004F50000-0x0000000004FE2000-memory.dmpFilesize
584KB
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memory/1476-153-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/1476-152-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/1476-151-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/1476-150-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/1476-147-0x0000000000000000-mapping.dmp
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memory/1516-135-0x0000000000000000-mapping.dmp
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memory/1516-141-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/1516-139-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/1516-138-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/1516-137-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/1516-136-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/1764-140-0x0000000000000000-mapping.dmp
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memory/4208-143-0x0000000000000000-mapping.dmp
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memory/4512-144-0x0000000000000000-mapping.dmp