Analysis
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max time kernel
150s -
max time network
148s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
22-10-2022 09:20
Static task
static1
Behavioral task
behavioral1
Sample
b5cb5e1203743569f525e297a5fd1a7b.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
b5cb5e1203743569f525e297a5fd1a7b.exe
Resource
win10v2004-20220901-en
General
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Target
b5cb5e1203743569f525e297a5fd1a7b.exe
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Size
1.1MB
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MD5
b5cb5e1203743569f525e297a5fd1a7b
-
SHA1
33f65a3b6bb816823866a286848fac808f64c1a0
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SHA256
43cb616356d0ad88a91a7beef82159db1e2345df33e0ad8cf4ce80a7cf1c277c
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SHA512
b6f5adef6d7c78fa1b3faf6cae0510b994a27a9ad8bdedac553bb15397f99e12b55a3d9299fa8c73884c3c35b7c0e44d1c4e93123d6a3591c87db27817596e4b
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SSDEEP
24576:Fj9kqnXJoyWyjv5IsSpW4X8riQIVLiT2Ea+ylAROJ3+PpLnSlF:FCMXJoZ85h8X8GQQLM2LfSW34nkF
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 2368 oos.exe 2896 oos.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
b5cb5e1203743569f525e297a5fd1a7b.exeWScript.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation b5cb5e1203743569f525e297a5fd1a7b.exe Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation WScript.exe -
Adds Run key to start application 2 TTPs 8 IoCs
Processes:
oos.exeb5cb5e1203743569f525e297a5fd1a7b.exedescription ioc process 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-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ b5cb5e1203743569f525e297a5fd1a7b.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" b5cb5e1203743569f525e297a5fd1a7b.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ b5cb5e1203743569f525e297a5fd1a7b.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" b5cb5e1203743569f525e297a5fd1a7b.exe Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Software\Microsoft\Windows\CurrentVersion\Run\ oos.exe Set value (str) \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" oos.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
b5cb5e1203743569f525e297a5fd1a7b.exeoos.exedescription pid process target process PID 4788 set thread context of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 2368 set thread context of 2896 2368 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:
b5cb5e1203743569f525e297a5fd1a7b.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000_Classes\Local Settings b5cb5e1203743569f525e297a5fd1a7b.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
b5cb5e1203743569f525e297a5fd1a7b.exepid process 4788 b5cb5e1203743569f525e297a5fd1a7b.exe 4788 b5cb5e1203743569f525e297a5fd1a7b.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
b5cb5e1203743569f525e297a5fd1a7b.exedescription pid process Token: SeDebugPrivilege 4788 b5cb5e1203743569f525e297a5fd1a7b.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
oos.exepid process 2896 oos.exe -
Suspicious use of WriteProcessMemory 36 IoCs
Processes:
b5cb5e1203743569f525e297a5fd1a7b.exeb5cb5e1203743569f525e297a5fd1a7b.exeWScript.execmd.exeoos.exedescription pid process target process PID 4788 wrote to memory of 5088 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5088 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5088 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 4788 wrote to memory of 5096 4788 b5cb5e1203743569f525e297a5fd1a7b.exe b5cb5e1203743569f525e297a5fd1a7b.exe PID 5096 wrote to memory of 5100 5096 b5cb5e1203743569f525e297a5fd1a7b.exe WScript.exe PID 5096 wrote to memory of 5100 5096 b5cb5e1203743569f525e297a5fd1a7b.exe WScript.exe PID 5096 wrote to memory of 5100 5096 b5cb5e1203743569f525e297a5fd1a7b.exe WScript.exe PID 5100 wrote to memory of 3140 5100 WScript.exe cmd.exe PID 5100 wrote to memory of 3140 5100 WScript.exe cmd.exe PID 5100 wrote to memory of 3140 5100 WScript.exe cmd.exe PID 3140 wrote to memory of 2368 3140 cmd.exe oos.exe PID 3140 wrote to memory of 2368 3140 cmd.exe oos.exe PID 3140 wrote to memory of 2368 3140 cmd.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe PID 2368 wrote to memory of 2896 2368 oos.exe oos.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\b5cb5e1203743569f525e297a5fd1a7b.exe"C:\Users\Admin\AppData\Local\Temp\b5cb5e1203743569f525e297a5fd1a7b.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\b5cb5e1203743569f525e297a5fd1a7b.exe"C:\Users\Admin\AppData\Local\Temp\b5cb5e1203743569f525e297a5fd1a7b.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\b5cb5e1203743569f525e297a5fd1a7b.exe"C:\Users\Admin\AppData\Local\Temp\b5cb5e1203743569f525e297a5fd1a7b.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
Loading Replay Monitor...
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
1.1MB
MD5b5cb5e1203743569f525e297a5fd1a7b
SHA133f65a3b6bb816823866a286848fac808f64c1a0
SHA25643cb616356d0ad88a91a7beef82159db1e2345df33e0ad8cf4ce80a7cf1c277c
SHA512b6f5adef6d7c78fa1b3faf6cae0510b994a27a9ad8bdedac553bb15397f99e12b55a3d9299fa8c73884c3c35b7c0e44d1c4e93123d6a3591c87db27817596e4b
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
1.1MB
MD5b5cb5e1203743569f525e297a5fd1a7b
SHA133f65a3b6bb816823866a286848fac808f64c1a0
SHA25643cb616356d0ad88a91a7beef82159db1e2345df33e0ad8cf4ce80a7cf1c277c
SHA512b6f5adef6d7c78fa1b3faf6cae0510b994a27a9ad8bdedac553bb15397f99e12b55a3d9299fa8c73884c3c35b7c0e44d1c4e93123d6a3591c87db27817596e4b
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
1.1MB
MD5b5cb5e1203743569f525e297a5fd1a7b
SHA133f65a3b6bb816823866a286848fac808f64c1a0
SHA25643cb616356d0ad88a91a7beef82159db1e2345df33e0ad8cf4ce80a7cf1c277c
SHA512b6f5adef6d7c78fa1b3faf6cae0510b994a27a9ad8bdedac553bb15397f99e12b55a3d9299fa8c73884c3c35b7c0e44d1c4e93123d6a3591c87db27817596e4b
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memory/2368-148-0x0000000000000000-mapping.dmp
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memory/2896-151-0x0000000000000000-mapping.dmp
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memory/2896-157-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/2896-156-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/2896-155-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/2896-154-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/3140-147-0x0000000000000000-mapping.dmp
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memory/4788-132-0x0000000000FE0000-0x00000000010F6000-memory.dmpFilesize
1.1MB
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memory/4788-137-0x0000000009A80000-0x0000000009AE6000-memory.dmpFilesize
408KB
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memory/4788-136-0x00000000096B0000-0x000000000974C000-memory.dmpFilesize
624KB
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memory/4788-135-0x00000000059A0000-0x00000000059AA000-memory.dmpFilesize
40KB
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memory/4788-134-0x0000000005A20000-0x0000000005AB2000-memory.dmpFilesize
584KB
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memory/4788-133-0x0000000005FD0000-0x0000000006574000-memory.dmpFilesize
5.6MB
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memory/5088-138-0x0000000000000000-mapping.dmp
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memory/5096-145-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5096-143-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5096-142-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5096-141-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5096-140-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5096-139-0x0000000000000000-mapping.dmp
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memory/5100-144-0x0000000000000000-mapping.dmp