Analysis
- max time kernel
149s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20221111-en - resource tags
- submitted
23/12/2022, 04:27
General
- Target TNT Original Documents PDF.exe
- Size 1.3MB
- Sample221223-e25bysba3z
- SHA256 c8ce7d7a1b3511466f838f2b09f1a644ac2ceaa09f508a81a601cc5c576e18d4
Malware Config
Extracted
-
remcos
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RemoteHost
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51.75.209.245:2404
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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
false
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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-CMFPLR
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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
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 11 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 21 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\TNT Original Documents PDF.exe"C:\Users\Admin\AppData\Local\Temp\TNT Original Documents PDF.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\TNT Original Documents PDF.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\uulhfUxuC.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\uulhfUxuC" /XML "C:\Users\Admin\AppData\Local\Temp\tmp279C.tmp"2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Local\Temp\TNT Original Documents PDF.exe"C:\Users\Admin\AppData\Local\Temp\TNT Original Documents PDF.exe"2⤵
- Suspicious use of SetWindowsHookEx
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
powershell.exe.log
StartupProfileData-NonInteractive
tmp279C.tmp
memory/224-162-0x0000000007DC0000-0x0000000007DC8000-memory.dmp
memory/224-159-0x0000000007D20000-0x0000000007DB6000-memory.dmp
memory/224-157-0x0000000007AA0000-0x0000000007ABA000-memory.dmp
memory/224-154-0x0000000075400000-0x000000007544C000-memory.dmp
memory/3052-148-0x0000000000400000-0x000000000047F000-memory.dmp
memory/3052-151-0x0000000000400000-0x000000000047F000-memory.dmp
memory/3052-165-0x0000000000400000-0x000000000047F000-memory.dmp
memory/3052-146-0x0000000000400000-0x000000000047F000-memory.dmp
memory/3052-149-0x0000000000400000-0x000000000047F000-memory.dmp
memory/3324-145-0x0000000004D50000-0x0000000004DB6000-memory.dmp
memory/3324-155-0x00000000069F0000-0x0000000006A0E000-memory.dmp
memory/3324-161-0x00000000070C0000-0x00000000070DA000-memory.dmp
memory/3324-143-0x0000000004AB0000-0x0000000004AD2000-memory.dmp
memory/3324-150-0x0000000005A60000-0x0000000005A7E000-memory.dmp
memory/3324-141-0x0000000004DC0000-0x00000000053E8000-memory.dmp
memory/3324-152-0x0000000006A10000-0x0000000006A42000-memory.dmp
memory/3324-160-0x0000000006FB0000-0x0000000006FBE000-memory.dmp
memory/3324-153-0x0000000075400000-0x000000007544C000-memory.dmp
memory/3324-147-0x0000000005460000-0x00000000054C6000-memory.dmp
memory/3324-140-0x0000000002190000-0x00000000021C6000-memory.dmp
memory/3324-156-0x00000000073D0000-0x0000000007A4A000-memory.dmp
memory/3324-158-0x0000000006DF0000-0x0000000006DFA000-memory.dmp
memory/4840-132-0x0000000000690000-0x00000000007DC000-memory.dmp
memory/4840-136-0x00000000079B0000-0x0000000007A4C000-memory.dmp
memory/4840-135-0x0000000005320000-0x000000000532A000-memory.dmp
memory/4840-134-0x0000000005160000-0x00000000051F2000-memory.dmp
memory/4840-133-0x00000000057D0000-0x0000000005D74000-memory.dmp