Analysis
- max time kernel
150s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system - submitted
04/10/2024, 05:57
Static task
static1
Behavioral task
behavioral1
Sample
673d693b0c8b68503d64ed15fd863d61.exe
Resource
win7-20240903-en
General
- Target 673d693b0c8b68503d64ed15fd863d61.exe
- Size 1017KB
- Sample241004-gnlnsssand
- SHA256 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4
- MD5 673d693b0c8b68503d64ed15fd863d61
- SHA1 4fb6b11e933354b9f7c5bda096543a5d6b56ff83
- SHA512 3996083d6b2f207e742a81a1dd11277c1bdb2631438a0ee72eeec88a57ff39fb2a7c9a100b30bc2839519c3019129d2157e89d6ade8cc326c4073daf4cc2bd27
- SSDEEP 24576:myN887MU2cPnNupjbW/5OheoofVmhGmfCtquly:myNVQUPNudihOhRdhHIqul
- MD5 SHA1 SHA512 SSDEEP
Malware Config
Extracted
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remcos
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IRN
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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%
-
screenshot_time
10
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take_screenshot_option
false
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take_screenshot_time
5
Signatures
- 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 1400 powershell.exe 4264 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-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation 673d693b0c8b68503d64ed15fd863d61.exe Key value queried \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation 673d693b0c8b68503d64ed15fd863d61.exe Key value queried \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation remcos.exe - Executes dropped EXE 4 IoCs
pid Process 648 remcos.exe 5100 remcos.exe 860 remcos.exe 2104 remcos.exe - Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" 673d693b0c8b68503d64ed15fd863d61.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" 673d693b0c8b68503d64ed15fd863d61.exe Set value (str) \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\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 4552 set thread context of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 648 set thread context of 2104 648 remcos.exe 101 - Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 schtasks.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language 673d693b0c8b68503d64ed15fd863d61.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 673d693b0c8b68503d64ed15fd863d61.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language powershell.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 3404 schtasks.exe 3000 schtasks.exe - Suspicious behavior: EnumeratesProcesses 8 IoCs
pid Process 1400 powershell.exe 1400 powershell.exe 648 remcos.exe 648 remcos.exe 4264 powershell.exe 648 remcos.exe 648 remcos.exe 4264 powershell.exe - Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 1400 powershell.exe Token: SeDebugPrivilege 648 remcos.exe Token: SeDebugPrivilege 4264 powershell.exe - Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 2104 remcos.exe - Suspicious use of WriteProcessMemory 45 IoCs
description pid Process procid_target PID 4552 wrote to memory of 1400 4552 673d693b0c8b68503d64ed15fd863d61.exe 86 PID 4552 wrote to memory of 1400 4552 673d693b0c8b68503d64ed15fd863d61.exe 86 PID 4552 wrote to memory of 1400 4552 673d693b0c8b68503d64ed15fd863d61.exe 86 PID 4552 wrote to memory of 3404 4552 673d693b0c8b68503d64ed15fd863d61.exe 88 PID 4552 wrote to memory of 3404 4552 673d693b0c8b68503d64ed15fd863d61.exe 88 PID 4552 wrote to memory of 3404 4552 673d693b0c8b68503d64ed15fd863d61.exe 88 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 4552 wrote to memory of 3580 4552 673d693b0c8b68503d64ed15fd863d61.exe 90 PID 3580 wrote to memory of 648 3580 673d693b0c8b68503d64ed15fd863d61.exe 92 PID 3580 wrote to memory of 648 3580 673d693b0c8b68503d64ed15fd863d61.exe 92 PID 3580 wrote to memory of 648 3580 673d693b0c8b68503d64ed15fd863d61.exe 92 PID 648 wrote to memory of 4264 648 remcos.exe 95 PID 648 wrote to memory of 4264 648 remcos.exe 95 PID 648 wrote to memory of 4264 648 remcos.exe 95 PID 648 wrote to memory of 3000 648 remcos.exe 97 PID 648 wrote to memory of 3000 648 remcos.exe 97 PID 648 wrote to memory of 3000 648 remcos.exe 97 PID 648 wrote to memory of 5100 648 remcos.exe 99 PID 648 wrote to memory of 5100 648 remcos.exe 99 PID 648 wrote to memory of 5100 648 remcos.exe 99 PID 648 wrote to memory of 860 648 remcos.exe 100 PID 648 wrote to memory of 860 648 remcos.exe 100 PID 648 wrote to memory of 860 648 remcos.exe 100 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101 PID 648 wrote to memory of 2104 648 remcos.exe 101
Processes
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C:\Users\Admin\AppData\Local\Temp\673d693b0c8b68503d64ed15fd863d61.exe"C:\Users\Admin\AppData\Local\Temp\673d693b0c8b68503d64ed15fd863d61.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4552 -
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:1400
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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\tmpA3B2.tmp"2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:3404
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C:\Users\Admin\AppData\Local\Temp\673d693b0c8b68503d64ed15fd863d61.exe"C:\Users\Admin\AppData\Local\Temp\673d693b0c8b68503d64ed15fd863d61.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3580 -
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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:648 -
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:4264
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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\tmpDA33.tmp"4⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:3000
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C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Executes dropped EXE
PID:5100
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C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Executes dropped EXE
PID:860
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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:2104
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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
- Path C:\ProgramData\Remcos\logs.dat
- Size 144B
- SHA256 637dc4c4921b1d86033120731403a82c28e87d52da489bb90e2878cb4ad488d7
- MD5 ff514dfdc9406b6ef3e78f3c6dcc82b3
- SHA1 94138f58512b60d4c3674715b8f22709eb5c8c05
- SHA512 1df585ca0b82122c90b9a9c99659a94c1c9318ce50a1acdf815c349b904f972f8453987ade03f1ebc7f073acdde301a377c976230b2ca2ba9777df93c8a87a76
- MD5 SHA1 SHA512
- Path C:\ProgramData\Remcos\remcos.exe
- Size 1017KB
- SHA256 a77754ef6de4a61024e443178b88e50be8b1994f87b323ed7fa5f2f197acdab4
- MD5 673d693b0c8b68503d64ed15fd863d61
- SHA1 4fb6b11e933354b9f7c5bda096543a5d6b56ff83
- SHA512 3996083d6b2f207e742a81a1dd11277c1bdb2631438a0ee72eeec88a57ff39fb2a7c9a100b30bc2839519c3019129d2157e89d6ade8cc326c4073daf4cc2bd27
- SSDEEP 24576:myN887MU2cPnNupjbW/5OheoofVmhGmfCtquly:myNVQUPNudihOhRdhHIqul
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
- Size 2KB
- SHA256 92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
- MD5 968cb9309758126772781b83adb8a28f
- SHA1 8da30e71accf186b2ba11da1797cf67f8f78b47c
- SHA512 4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
- Size 18KB
- SHA256 10d262e304d623da125dda0cb5f50ddab1cfdfbf563a96f32a1d89a212dc72d0
- MD5 9fec507c81cee365ffabb0b01643ee05
- SHA1 6e12bab9844df1b078ecc0458fc237410a8aff6c
- SHA512 7baa3d55c426104b025aa0b4fd729b6d12cc8110655ff902a8b40bf2448724e8969a39ea38b1d66694680c3d2df0b840a8af3bd10ad10b3f1a099176e5175747
- SSDEEP 384:Vsf+BC9i+pxbABBi67hpho2CThK6seYLME/N03SoZ6fYSgcjEDkyQ0gdEtkKhD:KflZko2xo2CThNgrWS1WCED/Ce3
- MD5 SHA1 SHA512 SSDEEP
- Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_dqht01o5.uwr.ps1
- Size 60B
- SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
- MD5 d17fe0a3f47be24a6453e9ef58c94641
- SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
- SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
- MD5 SHA1 SHA512
- Path C:\Users\Admin\AppData\Local\Temp\tmpA3B2.tmp
- Size 1KB
- SHA256 ca98d5fb297391398486d4ebdde189d0fe72e4ab1806120556f5db67987a6d20
- MD5 9b60a993d2a2e887611bcaf622672d4d
- SHA1 d7f81a31ab58bcfc1e3cffd988715d17e6149731
- SHA512 85f8d16b395ac1e28f7e30b34b50c19cd2d3bfcf09122dcb75cee8608047530d706eb14fff47d96c671beb09d7ea1d5257c0c447329c77f5ac50deb75e80dc2a
- MD5 SHA1 SHA512