Analysis
- max time kernel
148s - max time network
141s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
10/05/2024, 01:11
General
- Target 230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exe
- Size 819KB
- Sample240510-bj8d4sdc75
- SHA256 230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b
Malware Config
Extracted
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remcos
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RemoteHost
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trutru.duckdns.org:1199
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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
false
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keylog_crypt
false
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keylog_file
logs.dat
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keylog_flag
false
-
keylog_folder
fdvfdge
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mouse_option
false
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mutex
Rmc-T7BYND
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screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
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screenshot_path
%AppData%
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screenshot_time
10
-
take_screenshot_option
false
-
take_screenshot_time
5
Signatures
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 16 IoCs
- Detects executables built or packed with MPress PE compressor 16 IoCs
- Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 2 IoCs
- Detects executables referencing many email and collaboration clients. Observed in information stealers 2 IoCs
- NirSoft MailPassView 2 IoCs
Password recovery tool for various email clients
- NirSoft WebBrowserPassView 3 IoCs
Password recovery tool for various web browsers
- Nirsoft 7 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of SetThreadContext 3 IoCs
- Script User-Agent 2 IoCs
Uses user-agent string associated with script host/environment.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: MapViewOfSection 3 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 12 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exe"C:\Users\Admin\AppData\Local\Temp\230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exe"1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\extrac32.exeC:\\Windows\\System32\\extrac32.exe /C /Y C:\Users\Admin\AppData\Local\Temp\230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exe C:\\Users\\Public\\Libraries\\Gtltrkrz.PIF2⤵
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C:\Users\Admin\AppData\Local\Temp\230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exeC:\Users\Admin\AppData\Local\Temp\230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exe /stext "C:\Users\Admin\AppData\Local\Temp\hjxxh"2⤵
- Suspicious behavior: EnumeratesProcesses
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C:\Users\Admin\AppData\Local\Temp\230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exeC:\Users\Admin\AppData\Local\Temp\230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exe /stext "C:\Users\Admin\AppData\Local\Temp\rlchieonv"2⤵
- Accesses Microsoft Outlook accounts
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C:\Users\Admin\AppData\Local\Temp\230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exeC:\Users\Admin\AppData\Local\Temp\230fb3ddc18793a3a520810ad7d76eb3629558c327c3c1f0418c5d930bca035b.exe /stext "C:\Users\Admin\AppData\Local\Temp\ughaixzpjztp"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
logs.dat
hjxxh
memory/832-24-0x0000000000400000-0x0000000000462000-memory.dmp
memory/832-27-0x0000000000400000-0x0000000000462000-memory.dmp
memory/832-38-0x0000000000400000-0x0000000000462000-memory.dmp
memory/832-29-0x0000000000400000-0x0000000000462000-memory.dmp
memory/1676-43-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1676-25-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1676-28-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1676-37-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1676-22-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2956-49-0x0000000051C00000-0x0000000051C19000-memory.dmp
memory/2956-59-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-16-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-92-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-93-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-15-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-13-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-71-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-70-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-14-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-12-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-11-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-8-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-7-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-46-0x0000000051C00000-0x0000000051C19000-memory.dmp
memory/2956-50-0x0000000051C00000-0x0000000051C19000-memory.dmp
memory/2956-0-0x0000000000AB0000-0x0000000000AB1000-memory.dmp
memory/2956-51-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-1-0x0000000000400000-0x00000000004D5000-memory.dmp
memory/2956-18-0x0000000033800000-0x0000000034800000-memory.dmp
memory/2956-60-0x0000000033800000-0x0000000034800000-memory.dmp
memory/4168-30-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4168-33-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4168-39-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4168-32-0x0000000000400000-0x0000000000424000-memory.dmp