Analysis
- max time kernel
148s - max time network
144s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
27/10/2026, 23:27
General
- Target Fyrrenaalssbers.vbs
- Size 128KB
- Sample261027-3fsm2axvc1
- SHA256 a0a1bc1eb4d1575c7009725c3b3d5fca24e34d5e62cadef5f5ba44d6a21203c4
Malware Config
Extracted
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remcos
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6.0.0 Pro
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RemoteHost
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91.92.41.19:2404
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audio_folder
MicRecords
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audio_path
ApplicationPath
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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
false
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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-WM5MM5
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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
- Family: Remcos
Remcos is a closed-source remote control and surveillance software.
- Detected Nirsoft tools 3 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
- NirSoft MailPassView 1 IoCs
Password recovery tool for various email clients
- NirSoft WebBrowserPassView 1 IoCs
Password recovery tool for various web browsers
- Badlisted process makes network request 2 IoCs
Network request originating from process or tool commonly abused by malware.
- Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
- Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
- Contacts third-party web service commonly abused for C2 1 TTPs 3 IoCs
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
- Executes a VBScript file via the Windows Script Host. 1 TTPs 1 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 1 TTPs 2 IoCs
- Suspicious use of SetThreadContext 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Executes a command shell one-liner 1 TTPs 1 IoCs
Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.
- System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 12 IoCs
- Suspicious behavior: MapViewOfSection 1 TTPs 4 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 10 IoCs
- outlook_office_path 1 IoCs
Processes
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C:\Windows\System32\WScript.exe"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Fyrrenaalssbers.vbs"1⤵
- Executes a VBScript file via the Windows Script Host.
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\cmd.exe"C:\Windows\System32\cmd.exe" /v:on /c echo ^%Vadum^% | !avecerne! -2⤵
- Executes a command shell one-liner
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /S /D /c" echo %Vadum% "3⤵
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\??\c:\windows\syswow64\WindowsPowerShell\v1.0\powershell.exe"c:\windows\syswow64\WindowsPowerShell\v1.0\powershell.exe" -3⤵
- Badlisted process makes network request
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\backgroundtaskhost.exe"C:\Windows\SysWOW64\backgroundtaskhost.exe"4⤵
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C:\Windows\SysWOW64\backgroundtaskhost.exe"C:\Windows\SysWOW64\backgroundtaskhost.exe"4⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\backgroundtaskhost.exe"C:\Windows\SysWOW64\backgroundtaskhost.exe"5⤵
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C:\Windows\SysWOW64\backgroundtaskhost.exeC:\Windows\System32\backgroundtaskhost.exe /stext "C:\Users\Admin\AppData\Local\Temp\afeozplprllfiqbogftcuha"5⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
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C:\Windows\SysWOW64\backgroundtaskhost.exeC:\Windows\System32\backgroundtaskhost.exe /stext "C:\Users\Admin\AppData\Local\Temp\dzrhahwqftdsswpsxqowxuvzzzl"5⤵
- Accesses Microsoft Outlook accounts
- Accesses Microsoft Outlook profiles
- System Location Discovery: System Language Discovery
- outlook_office_path
-
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C:\Windows\SysWOW64\backgroundtaskhost.exeC:\Windows\System32\backgroundtaskhost.exe /stext "C:\Users\Admin\AppData\Local\Temp\ncxsaahktbvxuklwhaaxizppifuwmp"5⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
afeozplprllfiqbogftcuha
memory/428-46-0x0000000000400000-0x0000000000478000-memory.dmp
memory/428-52-0x0000000000400000-0x0000000000478000-memory.dmp
memory/428-54-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1016-47-0x0000000000400000-0x0000000000462000-memory.dmp
memory/1016-53-0x0000000000400000-0x0000000000462000-memory.dmp
memory/1016-49-0x0000000000400000-0x0000000000462000-memory.dmp
memory/1912-66-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-64-0x000000001E950000-0x000000001E969000-memory.dmp
memory/1912-67-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-42-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-65-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-69-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-63-0x000000001E950000-0x000000001E969000-memory.dmp
memory/1912-68-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-60-0x000000001E950000-0x000000001E969000-memory.dmp
memory/1912-57-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-70-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-71-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-72-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-73-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-74-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/1912-75-0x0000000000800000-0x0000000001AE6000-memory.dmp
memory/3396-15-0x0000000007410000-0x000000000742A000-memory.dmp
memory/3396-17-0x0000000007500000-0x0000000007522000-memory.dmp
memory/3396-27-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/3396-29-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/3396-24-0x0000000008C70000-0x000000000A9A6000-memory.dmp
memory/3396-25-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/3396-23-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/3396-22-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/3396-21-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/3396-20-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/3396-1-0x0000000004B60000-0x0000000004B96000-memory.dmp
memory/3396-2-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/3396-19-0x00000000746E2000-0x00000000746E3000-memory.dmp
memory/3396-3-0x00000000052B0000-0x00000000058FA000-memory.dmp
memory/3396-18-0x00000000086B0000-0x0000000008C6A000-memory.dmp
memory/3396-26-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/3396-16-0x0000000007560000-0x00000000075F6000-memory.dmp
memory/3396-0-0x00000000746E2000-0x00000000746E3000-memory.dmp
memory/3396-14-0x0000000007A70000-0x00000000080EC000-memory.dmp
memory/3396-13-0x0000000007240000-0x0000000007288000-memory.dmp
memory/3396-12-0x0000000006090000-0x00000000060DC000-memory.dmp
memory/3396-11-0x0000000006060000-0x000000000607E000-memory.dmp
memory/3396-10-0x0000000005BB0000-0x0000000005F0B000-memory.dmp
memory/3396-7-0x0000000005B40000-0x0000000005BA6000-memory.dmp
memory/3396-6-0x0000000005A60000-0x0000000005AC6000-memory.dmp
memory/3396-5-0x0000000005900000-0x0000000005922000-memory.dmp
memory/3396-4-0x00000000746D0000-0x0000000074E8C000-memory.dmp
memory/4712-48-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4712-50-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4712-51-0x0000000000400000-0x0000000000424000-memory.dmp