Analysis
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max time kernel
151s -
max time network
140s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
25-01-2023 11:49
Static task
static1
Behavioral task
behavioral1
Sample
Roshan Basnayaka CV.exe
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
Roshan Basnayaka CV.exe
Resource
win10v2004-20220812-en
General
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Target
Roshan Basnayaka CV.exe
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Size
1017KB
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MD5
b1d073104bbfc0210465938d4d83cab3
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SHA1
3d56e396ec24127071e94226c4d5b654ffe3afc2
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SHA256
32c38d159ca596fc6f8696c7462299312a8b243dd4ea75086946494f5c5cd801
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SHA512
e797a37a74182b6a330874cb8616a341c5b8c6f736c9d0597e49bc8f5abf99a0bfa0b5f6a5578cb7bd6b1d557dfa7bac3d041ef30c1b42ffce1848ff8d3435f0
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SSDEEP
24576:fK9SwdINS9riJ77z47hiGZXJkHrxPdIKkQ2FL:6H9r0778VdzKkQQL
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 1368 oos.exe 3368 oos.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
Roshan Basnayaka CV.exeWScript.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation Roshan Basnayaka CV.exe Key value queried \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation WScript.exe -
Adds Run key to start application 2 TTPs 8 IoCs
Processes:
Roshan Basnayaka CV.exeoos.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" Roshan Basnayaka CV.exe Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\ oos.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\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-1-5-21-2295526160-1155304984-640977766-1000\Software\Microsoft\Windows\CurrentVersion\Run\ Roshan Basnayaka CV.exe Set value (str) \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" Roshan Basnayaka CV.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ Roshan Basnayaka CV.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
Roshan Basnayaka CV.exeoos.exedescription pid process target process PID 2564 set thread context of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 1368 set thread context of 3368 1368 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:
Roshan Basnayaka CV.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000_Classes\Local Settings Roshan Basnayaka CV.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
Roshan Basnayaka CV.exepid process 2564 Roshan Basnayaka CV.exe 2564 Roshan Basnayaka CV.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
Roshan Basnayaka CV.exedescription pid process Token: SeDebugPrivilege 2564 Roshan Basnayaka CV.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
oos.exepid process 3368 oos.exe -
Suspicious use of WriteProcessMemory 36 IoCs
Processes:
Roshan Basnayaka CV.exeRoshan Basnayaka CV.exeWScript.execmd.exeoos.exedescription pid process target process PID 2564 wrote to memory of 3080 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 3080 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 3080 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 2564 wrote to memory of 5004 2564 Roshan Basnayaka CV.exe Roshan Basnayaka CV.exe PID 5004 wrote to memory of 5068 5004 Roshan Basnayaka CV.exe WScript.exe PID 5004 wrote to memory of 5068 5004 Roshan Basnayaka CV.exe WScript.exe PID 5004 wrote to memory of 5068 5004 Roshan Basnayaka CV.exe WScript.exe PID 5068 wrote to memory of 4308 5068 WScript.exe cmd.exe PID 5068 wrote to memory of 4308 5068 WScript.exe cmd.exe PID 5068 wrote to memory of 4308 5068 WScript.exe cmd.exe PID 4308 wrote to memory of 1368 4308 cmd.exe oos.exe PID 4308 wrote to memory of 1368 4308 cmd.exe oos.exe PID 4308 wrote to memory of 1368 4308 cmd.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe PID 1368 wrote to memory of 3368 1368 oos.exe oos.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\Roshan Basnayaka CV.exe"C:\Users\Admin\AppData\Local\Temp\Roshan Basnayaka CV.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\Roshan Basnayaka CV.exe"C:\Users\Admin\AppData\Local\Temp\Roshan Basnayaka CV.exe"2⤵
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C:\Users\Admin\AppData\Local\Temp\Roshan Basnayaka CV.exe"C:\Users\Admin\AppData\Local\Temp\Roshan Basnayaka CV.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
1017KB
MD5b1d073104bbfc0210465938d4d83cab3
SHA13d56e396ec24127071e94226c4d5b654ffe3afc2
SHA25632c38d159ca596fc6f8696c7462299312a8b243dd4ea75086946494f5c5cd801
SHA512e797a37a74182b6a330874cb8616a341c5b8c6f736c9d0597e49bc8f5abf99a0bfa0b5f6a5578cb7bd6b1d557dfa7bac3d041ef30c1b42ffce1848ff8d3435f0
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
1017KB
MD5b1d073104bbfc0210465938d4d83cab3
SHA13d56e396ec24127071e94226c4d5b654ffe3afc2
SHA25632c38d159ca596fc6f8696c7462299312a8b243dd4ea75086946494f5c5cd801
SHA512e797a37a74182b6a330874cb8616a341c5b8c6f736c9d0597e49bc8f5abf99a0bfa0b5f6a5578cb7bd6b1d557dfa7bac3d041ef30c1b42ffce1848ff8d3435f0
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
1017KB
MD5b1d073104bbfc0210465938d4d83cab3
SHA13d56e396ec24127071e94226c4d5b654ffe3afc2
SHA25632c38d159ca596fc6f8696c7462299312a8b243dd4ea75086946494f5c5cd801
SHA512e797a37a74182b6a330874cb8616a341c5b8c6f736c9d0597e49bc8f5abf99a0bfa0b5f6a5578cb7bd6b1d557dfa7bac3d041ef30c1b42ffce1848ff8d3435f0
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memory/1368-147-0x0000000000000000-mapping.dmp
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memory/2564-133-0x0000000005330000-0x00000000058D4000-memory.dmpFilesize
5.6MB
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memory/2564-134-0x0000000004C40000-0x0000000004CD2000-memory.dmpFilesize
584KB
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memory/2564-135-0x00000000026B0000-0x00000000026BA000-memory.dmpFilesize
40KB
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memory/2564-136-0x0000000008A80000-0x0000000008B1C000-memory.dmpFilesize
624KB
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memory/2564-132-0x0000000000170000-0x0000000000274000-memory.dmpFilesize
1.0MB
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memory/3080-137-0x0000000000000000-mapping.dmp
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memory/3368-155-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/3368-150-0x0000000000000000-mapping.dmp
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memory/3368-153-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/3368-154-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/3368-156-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/4308-146-0x0000000000000000-mapping.dmp
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memory/5004-138-0x0000000000000000-mapping.dmp
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memory/5004-144-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5004-142-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5004-141-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5004-140-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5004-139-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/5068-143-0x0000000000000000-mapping.dmp