Analysis
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max time kernel
148s -
max time network
153s -
platform
windows10-2004_x64 -
resource
win10v2004-20240802-en -
resource tags
arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system -
submitted
10-09-2024 07:35
Static task
static1
Behavioral task
behavioral1
Sample
TNT invoice.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
TNT invoice.exe
Resource
win10v2004-20240802-en
General
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Target
TNT invoice.exe
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Size
962KB
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MD5
36a61907068929b0cea9cfad4bb45b5f
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SHA1
564d7d74f94fe07b5590a6c17b0caad3536c61c6
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SHA256
b041b54fdd8bac5ca781c5b064235a29cc29480edb623a216a2a3d8aef71ea16
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SHA512
6e3f7cc4d0995c7937049cde030f983ca0d80afdf08dfa3defb14a6778349ae8296ee950407f5f0a1e42eb32122aa8a9b104a40a4f7171fd2c6c162896e2fc1d
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SSDEEP
24576:OkGY2eTMCq/oDIALSR7mD60noFfzE5BG:PAeTw/oDnWoD6GoBE5E
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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Credentials from Password Stores: Credentials from Web Browsers 1 TTPs
Malicious Access or copy of Web Browser Credential store.
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Detected Nirsoft tools 3 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
resource yara_rule behavioral2/memory/2688-141-0x0000000000400000-0x0000000000424000-memory.dmp Nirsoft behavioral2/memory/1296-134-0x0000000000400000-0x0000000000478000-memory.dmp Nirsoft behavioral2/memory/1904-133-0x0000000000400000-0x0000000000462000-memory.dmp Nirsoft -
NirSoft MailPassView 1 IoCs
Password recovery tool for various email clients
resource yara_rule behavioral2/memory/1904-133-0x0000000000400000-0x0000000000462000-memory.dmp MailPassView -
NirSoft WebBrowserPassView 1 IoCs
Password recovery tool for various web browsers
resource yara_rule behavioral2/memory/1296-134-0x0000000000400000-0x0000000000478000-memory.dmp WebBrowserPassView -
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 4960 powershell.exe 3048 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 TNT invoice.exe Key value queried \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation TNT invoice.exe Key value queried \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Control Panel\International\Geo\Nation remcos.exe -
Executes dropped EXE 5 IoCs
pid Process 5040 remcos.exe 4464 remcos.exe 1296 remcos.exe 1904 remcos.exe 2688 remcos.exe -
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
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Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
description ioc Process Key opened \REGISTRY\USER\S-1-5-21-1194130065-3471212556-1656947724-1000\Software\Microsoft\Office\Outlook\OMI Account Manager\Accounts 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\"" remcos.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" remcos.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\"" TNT invoice.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Rmc-CA8761 = "\"C:\\ProgramData\\Remcos\\remcos.exe\"" TNT invoice.exe -
Suspicious use of SetThreadContext 5 IoCs
description pid Process procid_target PID 4732 set thread context of 2800 4732 TNT invoice.exe 99 PID 5040 set thread context of 4464 5040 remcos.exe 105 PID 4464 set thread context of 1296 4464 remcos.exe 107 PID 4464 set thread context of 1904 4464 remcos.exe 108 PID 4464 set thread context of 2688 4464 remcos.exe 109 -
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 11 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 remcos.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language powershell.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language TNT invoice.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 remcos.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language TNT invoice.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 powershell.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 4428 schtasks.exe 3488 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 18 IoCs
pid Process 4732 TNT invoice.exe 4732 TNT invoice.exe 4732 TNT invoice.exe 4732 TNT invoice.exe 4732 TNT invoice.exe 4960 powershell.exe 4732 TNT invoice.exe 4960 powershell.exe 5040 remcos.exe 3048 powershell.exe 5040 remcos.exe 3048 powershell.exe 1296 remcos.exe 1296 remcos.exe 2688 remcos.exe 2688 remcos.exe 1296 remcos.exe 1296 remcos.exe -
Suspicious behavior: MapViewOfSection 3 IoCs
pid Process 4464 remcos.exe 4464 remcos.exe 4464 remcos.exe -
Suspicious use of AdjustPrivilegeToken 5 IoCs
description pid Process Token: SeDebugPrivilege 4732 TNT invoice.exe Token: SeDebugPrivilege 4960 powershell.exe Token: SeDebugPrivilege 5040 remcos.exe Token: SeDebugPrivilege 3048 powershell.exe Token: SeDebugPrivilege 2688 remcos.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 4464 remcos.exe -
Suspicious use of WriteProcessMemory 57 IoCs
description pid Process procid_target PID 4732 wrote to memory of 4960 4732 TNT invoice.exe 93 PID 4732 wrote to memory of 4960 4732 TNT invoice.exe 93 PID 4732 wrote to memory of 4960 4732 TNT invoice.exe 93 PID 4732 wrote to memory of 4428 4732 TNT invoice.exe 95 PID 4732 wrote to memory of 4428 4732 TNT invoice.exe 95 PID 4732 wrote to memory of 4428 4732 TNT invoice.exe 95 PID 4732 wrote to memory of 3212 4732 TNT invoice.exe 97 PID 4732 wrote to memory of 3212 4732 TNT invoice.exe 97 PID 4732 wrote to memory of 3212 4732 TNT invoice.exe 97 PID 4732 wrote to memory of 1704 4732 TNT invoice.exe 98 PID 4732 wrote to memory of 1704 4732 TNT invoice.exe 98 PID 4732 wrote to memory of 1704 4732 TNT invoice.exe 98 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 4732 wrote to memory of 2800 4732 TNT invoice.exe 99 PID 2800 wrote to memory of 5040 2800 TNT invoice.exe 100 PID 2800 wrote to memory of 5040 2800 TNT invoice.exe 100 PID 2800 wrote to memory of 5040 2800 TNT invoice.exe 100 PID 5040 wrote to memory of 3048 5040 remcos.exe 101 PID 5040 wrote to memory of 3048 5040 remcos.exe 101 PID 5040 wrote to memory of 3048 5040 remcos.exe 101 PID 5040 wrote to memory of 3488 5040 remcos.exe 103 PID 5040 wrote to memory of 3488 5040 remcos.exe 103 PID 5040 wrote to memory of 3488 5040 remcos.exe 103 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 5040 wrote to memory of 4464 5040 remcos.exe 105 PID 4464 wrote to memory of 1296 4464 remcos.exe 107 PID 4464 wrote to memory of 1296 4464 remcos.exe 107 PID 4464 wrote to memory of 1296 4464 remcos.exe 107 PID 4464 wrote to memory of 1296 4464 remcos.exe 107 PID 4464 wrote to memory of 1904 4464 remcos.exe 108 PID 4464 wrote to memory of 1904 4464 remcos.exe 108 PID 4464 wrote to memory of 1904 4464 remcos.exe 108 PID 4464 wrote to memory of 1904 4464 remcos.exe 108 PID 4464 wrote to memory of 2688 4464 remcos.exe 109 PID 4464 wrote to memory of 2688 4464 remcos.exe 109 PID 4464 wrote to memory of 2688 4464 remcos.exe 109 PID 4464 wrote to memory of 2688 4464 remcos.exe 109
Processes
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C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4732 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GpYKIf.exe"2⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4960
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GpYKIf" /XML "C:\Users\Admin\AppData\Local\Temp\tmp9683.tmp"2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:4428
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C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"2⤵PID:3212
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C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"2⤵PID:1704
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C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"C:\Users\Admin\AppData\Local\Temp\TNT invoice.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2800 -
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:5040 -
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GpYKIf.exe"4⤵
- Command and Scripting Interpreter: PowerShell
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3048
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C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GpYKIf" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCBFB.tmp"4⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
PID:3488
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C:\ProgramData\Remcos\remcos.exe"C:\ProgramData\Remcos\remcos.exe"4⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4464 -
C:\ProgramData\Remcos\remcos.exeC:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\bwobud"5⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
PID:1296
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C:\ProgramData\Remcos\remcos.exeC:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\dqtuuwrfh"5⤵
- Executes dropped EXE
- Accesses Microsoft Outlook accounts
- System Location Discovery: System Language Discovery
PID:1904
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C:\ProgramData\Remcos\remcos.exeC:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\oshfvobgvjjt"5⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2688
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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
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
144B
MD5116dbcc8376a60cf3ba9128894aefca9
SHA16a5321d8d207d130b1c2946948d9b0ab45f758d8
SHA2565d12679a84bba444611de8f9e3fada24175e16c4a2e8ce42ed37ab09569316af
SHA512a1d115db1d2ac3ea4b932fd6825c555c3f7b3cf01cd857f959886403260aebbb6d4c963e8642b885fd79dc14e4839d93a1a15fa7dd7c9ba4baa46a48b58a6f05
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Filesize
962KB
MD536a61907068929b0cea9cfad4bb45b5f
SHA1564d7d74f94fe07b5590a6c17b0caad3536c61c6
SHA256b041b54fdd8bac5ca781c5b064235a29cc29480edb623a216a2a3d8aef71ea16
SHA5126e3f7cc4d0995c7937049cde030f983ca0d80afdf08dfa3defb14a6778349ae8296ee950407f5f0a1e42eb32122aa8a9b104a40a4f7171fd2c6c162896e2fc1d
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Filesize
2KB
MD5968cb9309758126772781b83adb8a28f
SHA18da30e71accf186b2ba11da1797cf67f8f78b47c
SHA25692099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a
SHA5124bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3
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Filesize
18KB
MD59d9c26b9fe217b1fd1108d64b17a874c
SHA19895586a5dd085b8e35e5c1ae5a1fa59a5ec9b59
SHA256c4dc04e35c67aaf0fd67d1bf094872c60b72db98c3a285b7fd88d5663ac1d107
SHA512e3edb95ebd33ce25e2c96d43221b3a4972827242aafe93146ebdaa3bba913ed1487aee6f1a3207a30ba663e88362609f8ae6a634f06b685d87fe86bc37a1a5df
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Filesize
60B
MD5d17fe0a3f47be24a6453e9ef58c94641
SHA16ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA25696ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA5125b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
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Filesize
4KB
MD5ea01dd92b15d2f570f6b167dad2d1fd0
SHA17b89141d4c3eb2f29d096f28a9bfe66eb006224a
SHA2560515f49138d74283f9ac1042fd1a384f715b74c2b99193454dbb0cd585097727
SHA5120e7695aea30250a41829fa4abb681b8c3ed4c0955e18f1f9f3a5456bfb3a76f016f538e557bf29b99ab6ab48c846f9fa3c4bccd8cb5fe73099a81b5946029ec8
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Filesize
1KB
MD528f89cf850ff05ea427da37a2da82d2e
SHA158f6e7a8d896067c8199e35e29d2f1307052ef84
SHA256503748d3b2076f1eee498609d2c280ed46b89866552e3a2dc8e696365cea0f39
SHA512fbf799e9136067985329b698c22f0908ce3c5706d62606fea58c80f88ccd8a8067973a1ca054c30b1f3ec310a2f81ed6ccbeaae52cc73fd16837a2bde6ce2657