Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
05/12/2024, 11:29
General
- Target scan_241205-801_draft_PO.exe
- Size 1.2MB
- Sample241205-nl142asmgw
- SHA256 b5486818c1913895b913ace02e94fee62a6468b3df96abd6c75c863499873dd2
Malware Config
Extracted
-
remcos
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RemoteHost
-
162.251.122.87:2404
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audio_folder
MicRecords
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audio_path
ApplicationPath
-
audio_record_time
5
-
connect_delay
0
-
connect_interval
1
-
copy_file
remcos.exe
-
copy_folder
Remcos
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delete_file
false
-
hide_file
false
-
hide_keylog_file
false
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install_flag
false
-
keylog_crypt
false
-
keylog_file
logs.dat
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keylog_flag
false
-
keylog_folder
remcos
-
mouse_option
false
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mutex
Rmc-UOMZ21
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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
- Guloader family
- Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Remcos family
- Detected Nirsoft tools 7 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
- NirSoft MailPassView 2 IoCs
Password recovery tool for various email clients
- NirSoft WebBrowserPassView 2 IoCs
Password recovery tool for various web browsers
- Loads dropped DLL 2 IoCs
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 4 IoCs
- Drops file in Windows directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 6 IoCs
- Suspicious behavior: MapViewOfSection 4 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe"C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe"C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe"2⤵
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exeC:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe /stext "C:\Users\Admin\AppData\Local\Temp\yuvncwmexjsykc"3⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
-
-
C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exeC:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe /stext "C:\Users\Admin\AppData\Local\Temp\aojydgwylrkdmqsux"3⤵
- Accesses Microsoft Outlook accounts
- System Location Discovery: System Language Discovery
-
-
C:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exeC:\Users\Admin\AppData\Local\Temp\scan_241205-801_draft_PO.exe /stext "C:\Users\Admin\AppData\Local\Temp\lqoqdyhayzcqxwoggrzcu"3⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
System.dll
nshB977.tmp
nshB977.tmp
nshB977.tmp
nshB977.tmp
nshB977.tmp
nshB977.tmp
nsrB918.tmp
nsrBA04.tmp
nsrBA04.tmp
nsrBA04.tmp
yuvncwmexjsykc
memory/2776-610-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2776-595-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2776-591-0x0000000000400000-0x0000000000478000-memory.dmp
memory/2776-593-0x0000000000400000-0x0000000000478000-memory.dmp
memory/4168-605-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4168-598-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4168-597-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4168-600-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4168-606-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4408-579-0x00000000745B4000-0x00000000745B5000-memory.dmp
memory/4408-577-0x00000000063C0000-0x0000000007AFF000-memory.dmp
memory/4408-578-0x0000000077961000-0x0000000077A81000-memory.dmp
memory/4408-580-0x00000000063C0000-0x0000000007AFF000-memory.dmp
memory/4516-596-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4516-594-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4516-592-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4516-603-0x0000000000400000-0x0000000000462000-memory.dmp
memory/5048-590-0x0000000000850000-0x0000000001AA4000-memory.dmp
memory/5048-584-0x0000000001AB0000-0x00000000031EF000-memory.dmp
memory/5048-586-0x0000000000850000-0x0000000001AA4000-memory.dmp
memory/5048-583-0x0000000077A05000-0x0000000077A06000-memory.dmp
memory/5048-581-0x0000000001AB0000-0x00000000031EF000-memory.dmp
memory/5048-604-0x0000000077961000-0x0000000077A81000-memory.dmp
memory/5048-582-0x00000000779E8000-0x00000000779E9000-memory.dmp
memory/5048-613-0x00000000341E0000-0x00000000341F9000-memory.dmp
memory/5048-616-0x00000000341E0000-0x00000000341F9000-memory.dmp
memory/5048-617-0x00000000341E0000-0x00000000341F9000-memory.dmp