Resubmissions
21/05/2024, 09:40
240521-lnbaaagg231021/05/2024, 09:39
240521-lmn5ragg3s321/05/2024, 09:36
240521-lk6l1sgf373Analysis
- max time kernel
2691s - max time network
2702s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
21/05/2024, 09:40
General
- Target April Account Ledger_1.exe
- Size 574KB
- Sample240521-lnbaaagg23
- SHA256 8b56cc2c461f79c2cfcdbddf1dc63f021d5ccda36b9939715fd5c4f95c1d04c8
Malware Config
Extracted
-
remcos
-
1.7 Pro
-
NxT
-
185.156.174.115:11274
-
audio_folder
audio
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audio_path
%AppData%
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audio_record_time
5
-
connect_delay
0
-
connect_interval
5
-
copy_file
remcos.exe
-
copy_folder
remcos
-
delete_file
false
-
hide_file
false
-
hide_keylog_file
false
-
install_flag
false
-
install_path
%AppData%
-
keylog_crypt
false
-
keylog_file
windows.dat
-
keylog_flag
false
-
keylog_folder
NxT
-
keylog_path
%AppData%
-
mouse_option
false
-
mutex
remcos_wtxnvdauuk89796yuhjk7y
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screens
-
screenshot_path
%AppData%
-
screenshot_time
1
-
startup_value
remcos
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
- 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).
- 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 16 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 18 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\April Account Ledger_1.exe"C:\Users\Admin\AppData\Local\Temp\April Account Ledger_1.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
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\April Account Ledger_1.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\aUfUWGTtXU.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\aUfUWGTtXU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCC29.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\April Account Ledger_1.exe"C:\Users\Admin\AppData\Local\Temp\April Account Ledger_1.exe"2⤵
- Suspicious use of SetWindowsHookEx
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
powershell.exe.log
__PSScriptPolicyTest_ejwmlpqo.vv5.ps1
tmpCC29.tmp
memory/1100-8-0x0000000006A30000-0x0000000006A40000-memory.dmp
memory/1100-10-0x00000000084E0000-0x0000000008540000-memory.dmp
memory/1100-5-0x0000000074670000-0x0000000074E20000-memory.dmp
memory/1100-4-0x0000000005660000-0x000000000566A000-memory.dmp
memory/1100-7-0x00000000061F0000-0x000000000620E000-memory.dmp
memory/1100-3-0x00000000055B0000-0x0000000005642000-memory.dmp
memory/1100-9-0x0000000006B70000-0x0000000006B86000-memory.dmp
memory/1100-6-0x00000000059A0000-0x0000000005A3C000-memory.dmp
memory/1100-11-0x000000007467E000-0x000000007467F000-memory.dmp
memory/1100-12-0x0000000074670000-0x0000000074E20000-memory.dmp
memory/1100-2-0x0000000005A80000-0x0000000006024000-memory.dmp
memory/1100-47-0x0000000074670000-0x0000000074E20000-memory.dmp
memory/1100-0-0x000000007467E000-0x000000007467F000-memory.dmp
memory/1100-1-0x0000000000CC0000-0x0000000000D56000-memory.dmp
memory/3452-36-0x0000000000400000-0x0000000000417000-memory.dmp
memory/3452-38-0x0000000000400000-0x0000000000417000-memory.dmp
memory/3452-41-0x0000000000400000-0x0000000000417000-memory.dmp
memory/4540-55-0x0000000070E60000-0x0000000070EAC000-memory.dmp
memory/4540-81-0x0000000007410000-0x0000000007421000-memory.dmp
memory/4540-90-0x0000000074670000-0x0000000074E20000-memory.dmp
memory/4540-85-0x0000000007530000-0x0000000007538000-memory.dmp
memory/4540-28-0x00000000057C0000-0x00000000057E2000-memory.dmp
memory/4540-35-0x00000000058D0000-0x0000000005936000-memory.dmp
memory/4540-34-0x0000000005860000-0x00000000058C6000-memory.dmp
memory/4540-51-0x0000000005A40000-0x0000000005D94000-memory.dmp
memory/4540-83-0x0000000007450000-0x0000000007464000-memory.dmp
memory/4540-21-0x0000000074670000-0x0000000074E20000-memory.dmp
memory/4540-79-0x0000000007280000-0x000000000728A000-memory.dmp
memory/4540-77-0x0000000007850000-0x0000000007ECA000-memory.dmp
memory/5092-82-0x0000000006F70000-0x0000000006F7E000-memory.dmp
memory/5092-84-0x0000000007080000-0x000000000709A000-memory.dmp
memory/5092-54-0x0000000005FE0000-0x0000000006012000-memory.dmp
memory/5092-76-0x00000000069E0000-0x0000000006A83000-memory.dmp
memory/5092-78-0x0000000006D40000-0x0000000006D5A000-memory.dmp
memory/5092-20-0x0000000074670000-0x0000000074E20000-memory.dmp
memory/5092-91-0x0000000074670000-0x0000000074E20000-memory.dmp
memory/5092-80-0x0000000006FC0000-0x0000000007056000-memory.dmp
memory/5092-56-0x0000000070E60000-0x0000000070EAC000-memory.dmp
memory/5092-52-0x0000000005A10000-0x0000000005A2E000-memory.dmp
memory/5092-53-0x0000000005AB0000-0x0000000005AFC000-memory.dmp
memory/5092-19-0x0000000004C50000-0x0000000005278000-memory.dmp
memory/5092-75-0x0000000005FC0000-0x0000000005FDE000-memory.dmp
memory/5092-17-0x0000000002110000-0x0000000002146000-memory.dmp
memory/5092-18-0x0000000074670000-0x0000000074E20000-memory.dmp