Analysis
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max time kernel
161s -
max time network
157s -
platform
windows10-2004_x64 -
resource
win10v2004-20220901-en -
resource tags
arch:x64arch:x86image:win10v2004-20220901-enlocale:en-usos:windows10-2004-x64system -
submitted
31-10-2022 14:02
Static task
static1
Behavioral task
behavioral1
Sample
tmp.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
tmp.exe
Resource
win10v2004-20220901-en
General
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Target
tmp.exe
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Size
934KB
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MD5
9bd821ba65b89710d2d81c7a7b98ab5d
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SHA1
cbdc6446729b60601f7c288bc063cd9cc216f925
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SHA256
99d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8
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SHA512
30ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4
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SSDEEP
24576:xcCEmyVj6jI43L84UytM00todtTQxRjU/oe:xcCRI6jIepUy+ZtmdGR
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 4352 oos.exe 4064 oos.exe -
Checks computer location settings 2 TTPs 2 IoCs
Looks up country code configured in the registry, likely geofence.
Processes:
tmp.exeWScript.exedescription ioc process Key value queried \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation tmp.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:
tmp.exeoos.exedescription ioc process 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\"" tmp.exe Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\ tmp.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\kkl = "\"C:\\Users\\Admin\\AppData\\Roaming\\oos.exe\"" tmp.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 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\ tmp.exe -
Suspicious use of SetThreadContext 2 IoCs
Processes:
tmp.exeoos.exedescription pid process target process PID 2248 set thread context of 4268 2248 tmp.exe tmp.exe PID 4352 set thread context of 4064 4352 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:
tmp.exedescription ioc process Key created \REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000_Classes\Local Settings tmp.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
oos.exepid process 4064 oos.exe -
Suspicious use of WriteProcessMemory 33 IoCs
Processes:
tmp.exetmp.exeWScript.execmd.exeoos.exedescription pid process target process PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 2248 wrote to memory of 4268 2248 tmp.exe tmp.exe PID 4268 wrote to memory of 2520 4268 tmp.exe WScript.exe PID 4268 wrote to memory of 2520 4268 tmp.exe WScript.exe PID 4268 wrote to memory of 2520 4268 tmp.exe WScript.exe PID 2520 wrote to memory of 1052 2520 WScript.exe cmd.exe PID 2520 wrote to memory of 1052 2520 WScript.exe cmd.exe PID 2520 wrote to memory of 1052 2520 WScript.exe cmd.exe PID 1052 wrote to memory of 4352 1052 cmd.exe oos.exe PID 1052 wrote to memory of 4352 1052 cmd.exe oos.exe PID 1052 wrote to memory of 4352 1052 cmd.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe PID 4352 wrote to memory of 4064 4352 oos.exe oos.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.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
934KB
MD59bd821ba65b89710d2d81c7a7b98ab5d
SHA1cbdc6446729b60601f7c288bc063cd9cc216f925
SHA25699d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8
SHA51230ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
934KB
MD59bd821ba65b89710d2d81c7a7b98ab5d
SHA1cbdc6446729b60601f7c288bc063cd9cc216f925
SHA25699d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8
SHA51230ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4
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C:\Users\Admin\AppData\Roaming\oos.exeFilesize
934KB
MD59bd821ba65b89710d2d81c7a7b98ab5d
SHA1cbdc6446729b60601f7c288bc063cd9cc216f925
SHA25699d28200203baac82a7253419526711f38d7ecb1a6098f243c8656adc72ef6d8
SHA51230ad861b9015a201cec5e6a88ce6cba3e03459f1c709ef50c89505de96e5760e7c1647dc8382751fffc3c9ed843b539114b52051e8d564c6fde7fad08436c5a4
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memory/1052-144-0x0000000000000000-mapping.dmp
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memory/2248-136-0x0000000008DC0000-0x0000000008E5C000-memory.dmpFilesize
624KB
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memory/2248-132-0x00000000006A0000-0x0000000000790000-memory.dmpFilesize
960KB
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memory/2248-135-0x00000000052E0000-0x00000000052EA000-memory.dmpFilesize
40KB
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memory/2248-134-0x0000000005130000-0x00000000051C2000-memory.dmpFilesize
584KB
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memory/2248-133-0x00000000056E0000-0x0000000005C84000-memory.dmpFilesize
5.6MB
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memory/2520-141-0x0000000000000000-mapping.dmp
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memory/4064-154-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/4064-153-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/4064-152-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/4064-148-0x0000000000000000-mapping.dmp
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memory/4064-151-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/4268-142-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/4268-140-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/4268-139-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/4268-138-0x0000000000400000-0x000000000047E000-memory.dmpFilesize
504KB
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memory/4268-137-0x0000000000000000-mapping.dmp
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memory/4352-145-0x0000000000000000-mapping.dmp