Analysis
- max time kernel
149s - max time network
144s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
06/03/2026, 10:06
General
- Target _f42a7201a6f9d1a0bb2b5e4467690d63aea67ed968feb87fee30d6de46a3dead.js
- Size 3.0MB
- Sample260306-l5f7vsaz7m
- SHA256 f42a7201a6f9d1a0bb2b5e4467690d63aea67ed968feb87fee30d6de46a3dead
Malware Config
Extracted
-
remcos
-
7.1.0 Pro
-
RemoteHost
-
flivication-officefax.myhome-server.de:4333
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audio_folder
MicRecords
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audio_path
ApplicationPath
-
audio_record_time
5
-
connect_delay
0
-
connect_interval
1
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copy_file
remcos.exe
-
copy_folder
Remcos
-
delete_file
false
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hide_file
false
-
hide_keylog_file
false
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install_flag
false
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keylog_crypt
false
-
keylog_file
gfufi.dat
-
keylog_flag
false
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keylog_folder
kuyip
-
mouse_option
false
-
mutex
kjgig-K47TC9
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
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screenshot_path
%AppData%
-
screenshot_time
10
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Remcos family
- Detected Nirsoft tools 1 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell and hide display window.
- Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
- Suspicious use of SetThreadContext 4 IoCs
- Command and Scripting Interpreter: JavaScript 1 TTPs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 4 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Kills process with taskkill 1 IoCs
- Suspicious behavior: EnumeratesProcesses 24 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 12 IoCs
Processes
-
C:\Windows\system32\wscript.exewscript.exe C:\Users\Admin\AppData\Local\Temp\_f42a7201a6f9d1a0bb2b5e4467690d63aea67ed968feb87fee30d6de46a3dead.js1⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell.exe -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -File "C:\Temp\ps_BBD5QcsvefFx_1772791610405.ps1"2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MsBuild.exe"3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\rmclient.exe/stext "C:\Users\Admin\AppData\Local\Temp\lxvmnf"4⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
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C:\Windows\SysWOW64\rmclient.exe/stext "C:\Users\Admin\AppData\Local\Temp\orbfoxbih"4⤵
- Accesses Microsoft Outlook accounts
- System Location Discovery: System Language Discovery
-
-
C:\Windows\SysWOW64\rmclient.exe/stext "C:\Users\Admin\AppData\Local\Temp\ytoppqmkdxzh"4⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
-
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C:\Windows\System32\taskkill.exe"C:\Windows\System32\taskkill.exe" /f /im wscript.exe2⤵
- Kills process with taskkill
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
gfufi.dat
ps_BBD5QcsvefFx_1772791610405.ps1
__PSScriptPolicyTest_islqd4lm.4mn.ps1
lxvmnf
memory/660-38-0x0000000000400000-0x000000000045E000-memory.dmp
memory/660-37-0x0000000000D10000-0x0000000000D8A000-memory.dmp
memory/660-30-0x0000000000400000-0x000000000045E000-memory.dmp
memory/2184-42-0x00000202BA940000-0x00000202BA94C000-memory.dmp
memory/2184-10-0x00000202D3020000-0x00000202D3034000-memory.dmp
memory/2184-43-0x00000202BAB00000-0x00000202BAB12000-memory.dmp
memory/2184-7-0x00000202D3030000-0x00000202D3052000-memory.dmp
memory/2184-1-0x00000202BAB30000-0x00000202BAB40000-memory.dmp
memory/2184-20-0x00000202BAB30000-0x00000202BAB40000-memory.dmp
memory/2184-11-0x00000202BAB30000-0x00000202BAB40000-memory.dmp
memory/2184-12-0x00000202D32E0000-0x00000202D32F4000-memory.dmp
memory/2184-28-0x00000202BAB30000-0x00000202BAB40000-memory.dmp
memory/2324-26-0x000001F4062C0000-0x000001F40636E000-memory.dmp
memory/2324-27-0x000001F407BB0000-0x000001F407BBC000-memory.dmp
memory/2324-64-0x000001F4062C0000-0x000001F40636E000-memory.dmp
memory/3856-33-0x0000000001280000-0x00000000012FA000-memory.dmp
memory/3856-32-0x0000000000400000-0x0000000000424000-memory.dmp
memory/3856-31-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4904-21-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-53-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-25-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-24-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-23-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-22-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-119-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-118-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-19-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-45-0x0000000010000000-0x0000000010019000-memory.dmp
memory/4904-48-0x0000000010000000-0x0000000010019000-memory.dmp
memory/4904-49-0x0000000010000000-0x0000000010019000-memory.dmp
memory/4904-16-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-50-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-15-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-107-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-57-0x0000000001600000-0x000000000167A000-memory.dmp
memory/4904-58-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-59-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-14-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-13-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-83-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-84-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-96-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-97-0x0000000000400000-0x0000000000483000-memory.dmp
memory/4904-108-0x0000000000400000-0x0000000000483000-memory.dmp
memory/5104-29-0x0000000000400000-0x000000000047E000-memory.dmp
memory/5104-41-0x00000000012D0000-0x000000000134A000-memory.dmp
memory/5104-40-0x0000000000400000-0x000000000047E000-memory.dmp