Analysis
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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
26-09-2024 14:24
Static task
static1
Behavioral task
behavioral1
Sample
TNT invoice 9.26.2024 .exe
Resource
win7-20240903-en
General
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Target
TNT invoice 9.26.2024 .exe
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Size
881KB
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MD5
7afd5be4b77090388ddecb8169cf0bc3
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SHA1
d3b6ba2e53aed1471c12196c577b7be56d14cf2f
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SHA256
68a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036
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SHA512
2f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06
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SSDEEP
24576:VE8AE9lxicGLP0CDyB/1FNlUcDos713jb:VExsxiTVe1F/UcDosVb
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 3176 powershell.exe 4920 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-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation TNT invoice 9.26.2024 .exe Key value queried \REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation TNT invoice 9.26.2024 .exe Key value queried \REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\Control Panel\International\Geo\Nation remcos.exe -
Executes dropped EXE 3 IoCs
pid Process 4216 remcos.exe 4668 remcos.exe 3480 remcos.exe -
Adds Run key to start application 2 TTPs 4 IoCs
description ioc Process Set value (str) \REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" TNT invoice 9.26.2024 .exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" TNT invoice 9.26.2024 .exe Set value (str) \REGISTRY\USER\S-1-5-21-1302416131-1437503476-2806442725-1000\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 2164 set thread context of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 4216 set thread context of 3480 4216 remcos.exe 93 -
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 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 TNT invoice 9.26.2024 .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 TNT invoice 9.26.2024 .exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language remcos.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 516 schtasks.exe 3972 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 6 IoCs
pid Process 3176 powershell.exe 3176 powershell.exe 4920 powershell.exe 4216 remcos.exe 4216 remcos.exe 4920 powershell.exe -
Suspicious use of AdjustPrivilegeToken 3 IoCs
description pid Process Token: SeDebugPrivilege 3176 powershell.exe Token: SeDebugPrivilege 4920 powershell.exe Token: SeDebugPrivilege 4216 remcos.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3480 remcos.exe -
Suspicious use of WriteProcessMemory 42 IoCs
description pid Process procid_target PID 2164 wrote to memory of 3176 2164 TNT invoice 9.26.2024 .exe 82 PID 2164 wrote to memory of 3176 2164 TNT invoice 9.26.2024 .exe 82 PID 2164 wrote to memory of 3176 2164 TNT invoice 9.26.2024 .exe 82 PID 2164 wrote to memory of 516 2164 TNT invoice 9.26.2024 .exe 84 PID 2164 wrote to memory of 516 2164 TNT invoice 9.26.2024 .exe 84 PID 2164 wrote to memory of 516 2164 TNT invoice 9.26.2024 .exe 84 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 2164 wrote to memory of 1112 2164 TNT invoice 9.26.2024 .exe 86 PID 1112 wrote to memory of 4216 1112 TNT invoice 9.26.2024 .exe 87 PID 1112 wrote to memory of 4216 1112 TNT invoice 9.26.2024 .exe 87 PID 1112 wrote to memory of 4216 1112 TNT invoice 9.26.2024 .exe 87 PID 4216 wrote to memory of 4920 4216 remcos.exe 88 PID 4216 wrote to memory of 4920 4216 remcos.exe 88 PID 4216 wrote to memory of 4920 4216 remcos.exe 88 PID 4216 wrote to memory of 3972 4216 remcos.exe 90 PID 4216 wrote to memory of 3972 4216 remcos.exe 90 PID 4216 wrote to memory of 3972 4216 remcos.exe 90 PID 4216 wrote to memory of 4668 4216 remcos.exe 92 PID 4216 wrote to memory of 4668 4216 remcos.exe 92 PID 4216 wrote to memory of 4668 4216 remcos.exe 92 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93 PID 4216 wrote to memory of 3480 4216 remcos.exe 93
Processes
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C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2164 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3176
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9431.tmp"2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:516
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C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"C:\Users\Admin\AppData\Local\Temp\TNT invoice 9.26.2024 .exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1112 -
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:4216 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GLFzLcBn.exe"4⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4920
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GLFzLcBn" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC9E7.tmp"4⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:3972
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C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Executes dropped EXE
PID:4668
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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:3480
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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
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Downloads
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Filesize
144B
MD5fc9b799b1fd92b1e7f9c145ded0f9cae
SHA10c0082e9c142f8f5266094faace1a94c5165c7a8
SHA256965841bc72460214d2cf77e46da9fc2ce97e1bc3390d2e6232bbb48e4ad84669
SHA51206db99ad91bd5c8179d5bfd9f0e205d56a809adbbaa41926c740adad61db3a6c6af58b5bbc498c8c09936e3d9833c3ed8c53334075d972315c1cfdeff8495f32
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Filesize
881KB
MD57afd5be4b77090388ddecb8169cf0bc3
SHA1d3b6ba2e53aed1471c12196c577b7be56d14cf2f
SHA25668a4b0d743c427d59d076376e5c3a131ee7ab29cdc959b8872735c06b70b7036
SHA5122f16fce3f75bce88c79286f41010d76691fe0fab37c4fad814867b819c60c81fe4dff17ad722952cc6c7a7d99aaec75d51d2fd16350babb8d3388e11d2236a06
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Filesize
2KB
MD5968cb9309758126772781b83adb8a28f
SHA18da30e71accf186b2ba11da1797cf67f8f78b47c
SHA25692099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
SHA5124bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3
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Filesize
18KB
MD58eb8f5ae54e7dac105cdeb6de1bc71dc
SHA111578a98fc52b7c309fee12760ac210fe12303fd
SHA256ce34ed10410e0d002d55fddd33785bb44dadf69dbe63616cb85f3621105ebfd7
SHA512e0a51d6d7015c679551ec23a366e883470e31436c5d1124fd52526be02573a916bdf2f34c563e08c3b2c3863cf57f288cfa1731c76dc0085f63e131e8225297f
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
1KB
MD5ec756958734c1538379ebefe0051326e
SHA14e68bcdd3a5ca64acad9f66155dfe8f0010dd6e9
SHA256f71c296a6a4684db1b1861da235a6d3b9fc7d9160c9f2d1bd6c7f54d53e00b21
SHA5123a1d5916de849ff8aad6f9e22d2653a99ecc9ec4a2a535137ed2459ad9ebd04ddba904770eac27a6e72f1e0e29d47f0c5f4fdadcedad34fc16ef1cb69a3160c2