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Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
06/10/2024, 16:27
Static task
static1
Behavioral task
behavioral1
Sample
a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe
Resource
win7-20240729-en
General
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Target
a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe
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Size
1017KB
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MD5
673d693b0c8b68503d64ed15fd863d61
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SHA1
4fb6b11e933354b9f7c5bda096543a5d6b56ff83
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SHA256
a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4
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SHA512
3996083d6b2f207e742a81a1dd11277c1bdb2631438a0ee72eeec88a57ff39fb2a7c9a100b30bc2839519c3019129d2157e89d6ade8cc326c4073daf4cc2bd27
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SSDEEP
24576:myN887MU2cPnNupjbW/5OheoofVmhGmfCtquly:myNVQUPNudihOhRdhHIqul
Malware Config
Extracted
remcos
IRN
irnserv1.ddns.net:4424
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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
true
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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-CA8761
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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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take_screenshot_option
false
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take_screenshot_time
5
Signatures
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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.
pid Process 2348 powershell.exe 3812 powershell.exe -
Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe Key value queried \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe Key value queried \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation remcos.exe -
Executes dropped EXE 2 IoCs
pid Process 4256 remcos.exe 1360 remcos.exe -
Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe Set value (str) \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.exe -
Suspicious use of SetThreadContext 2 IoCs
description pid Process procid_target PID 1556 set thread context of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 4256 set thread context of 1360 4256 remcos.exe 101 -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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System Location Discovery: System Language Discovery 1 TTPs 8 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
description ioc Process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language remcos.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language powershell.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language remcos.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language powershell.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language schtasks.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
pid Process 1864 schtasks.exe 2852 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 4 IoCs
pid Process 2348 powershell.exe 2348 powershell.exe 3812 powershell.exe 3812 powershell.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
description pid Process Token: SeDebugPrivilege 2348 powershell.exe Token: SeDebugPrivilege 3812 powershell.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 1360 remcos.exe -
Suspicious use of WriteProcessMemory 39 IoCs
description pid Process procid_target PID 1556 wrote to memory of 2348 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 84 PID 1556 wrote to memory of 2348 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 84 PID 1556 wrote to memory of 2348 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 84 PID 1556 wrote to memory of 2852 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 86 PID 1556 wrote to memory of 2852 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 86 PID 1556 wrote to memory of 2852 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 86 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 1556 wrote to memory of 116 1556 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 88 PID 116 wrote to memory of 4256 116 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 89 PID 116 wrote to memory of 4256 116 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 89 PID 116 wrote to memory of 4256 116 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe 89 PID 4256 wrote to memory of 3812 4256 remcos.exe 97 PID 4256 wrote to memory of 3812 4256 remcos.exe 97 PID 4256 wrote to memory of 3812 4256 remcos.exe 97 PID 4256 wrote to memory of 1864 4256 remcos.exe 99 PID 4256 wrote to memory of 1864 4256 remcos.exe 99 PID 4256 wrote to memory of 1864 4256 remcos.exe 99 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101 PID 4256 wrote to memory of 1360 4256 remcos.exe 101
Processes
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C:\Users\Admin\AppData\Local\Temp\a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe"C:\Users\Admin\AppData\Local\Temp\a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1556 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mDBLQPaU.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2348
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmpF462.tmp"2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:2852
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C:\Users\Admin\AppData\Local\Temp\a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe"C:\Users\Admin\AppData\Local\Temp\a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:116 -
C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"3⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4256 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\mDBLQPaU.exe"4⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3812
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\mDBLQPaU" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2AB5.tmp"4⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:1864
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C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Executes dropped EXE
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:1360
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Network
MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
144B
MD5480ae1320ca4e1f5b4fb405d00bd17ad
SHA139f9c8994712caa802641bd703cd93ac857963da
SHA2564e44c3d2de124848c900bb7b5e000aa17803d7e88da77b10451ef00d82aa9aa3
SHA512961a1373c12755a5e0ee5998fa753bc5fb1285a4925e06ba1caaa73224755b21dabfd8746121f04c219c65adec9293a0a86e17648c1b88a2025cb41f4526eb4d
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Filesize
1017KB
MD5673d693b0c8b68503d64ed15fd863d61
SHA14fb6b11e933354b9f7c5bda096543a5d6b56ff83
SHA256a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4
SHA5123996083d6b2f207e742a81a1dd11277c1bdb2631438a0ee72eeec88a57ff39fb2a7c9a100b30bc2839519c3019129d2157e89d6ade8cc326c4073daf4cc2bd27
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Filesize
2KB
MD5968cb9309758126772781b83adb8a28f
SHA18da30e71accf186b2ba11da1797cf67f8f78b47c
SHA25692099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
SHA5124bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3
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Filesize
18KB
MD586990901554690664ca4007a7cacb865
SHA1ea9986cdd0547aa1d49d3d44fe52ee6edca9ab4a
SHA25619d060b23e845588372c222513125c838dab85ea3f09ba1dbdb66ac29f167ff1
SHA51252235e74948ee88bf1b34e22fe23a0d9c29b48daeac83e1918ba57a79a2a090d7b7a650074de2b6322b89c0a22111c7bf040bfad3d3dcbd23775dad70db63b94
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
1KB
MD50dc51f028d485822df795a4821e7573a
SHA140f2a177cd700097541f3bcd1b6214bf5570c207
SHA256a173f97a957479843b02f298e0bcaf77a3644f8f406572c1043442e58cd1db42
SHA512c317329ccd518f50c9c8fdc79df5251ff203ea07956ecdd7ca040dee99f482f59d71f16271f7ec7bcd3b1a7d7405c89273533ec7384003a1d996f21aaffa2117