Analysis
- max time kernel
150s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
28/09/2024, 01:58
General
- Target e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exe
- Size 795KB
- Sample240928-cd5ayatcph
- SHA256 e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38
Malware Config
Extracted
-
remcos
-
RemoteHost
-
66.150.198.142:2700
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66.150.198.142:27000
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66.150.198.142:26000
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66.150.198.142:28000
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audio_folder
MicRecords
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audio_record_time
5
-
connect_delay
0
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connect_interval
1
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copy_file
remcos.exe
-
copy_folder
Remcos
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delete_file
false
-
hide_file
false
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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
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keylog_folder
remcos
-
mouse_option
false
-
mutex
Rmc-I617OK
-
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,Cloudeye
A shellcode based downloader first seen in 2020.
- Remcos
Remcos is a closed-source remote control and surveillance software.
- Detected Nirsoft tools 10 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
- NirSoft MailPassView 5 IoCs
Password recovery tool for various email clients
- NirSoft WebBrowserPassView 5 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 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 4 IoCs
- Drops file in Program Files directory 1 IoCs
- Drops file in Windows directory 1 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 WriteProcessMemory 14 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exe"C:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exe"C:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.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 WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exeC:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exe /stext "C:\Users\Admin\AppData\Local\Temp\gyxyllmzcrzhawhpejoxb"3⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
-
-
C:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exeC:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exe /stext "C:\Users\Admin\AppData\Local\Temp\qtcjmdxtqzrmdcdtnubzdaqut"3⤵
- Accesses Microsoft Outlook accounts
- System Location Discovery: System Language Discovery
-
-
C:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exeC:\Users\Admin\AppData\Local\Temp\e4ed3892cc2c77e7de57a5fc47040118740b1a672747f72193ed065570a55b38.exe /stext "C:\Users\Admin\AppData\Local\Temp\tvpbmviuehjznrrxffosoeddcpll"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
gyxyllmzcrzhawhpejoxb
System.dll
memory/1476-56-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1476-77-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1476-55-0x0000000000400000-0x0000000000478000-memory.dmp
memory/1476-57-0x0000000000400000-0x0000000000478000-memory.dmp
memory/3472-28-0x0000000077951000-0x0000000077A71000-memory.dmp
memory/3472-29-0x0000000010004000-0x0000000010005000-memory.dmp
memory/3472-27-0x0000000077951000-0x0000000077A71000-memory.dmp
memory/4248-58-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4248-62-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4248-63-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4248-66-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4724-89-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-75-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-44-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-45-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-46-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-47-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-49-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-50-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-51-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-52-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-53-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-54-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-37-0x0000000001A80000-0x000000000605B000-memory.dmp
memory/4724-42-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-69-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-105-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-72-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-104-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-41-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-103-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-102-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-40-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-39-0x0000000000854000-0x0000000000855000-memory.dmp
memory/4724-33-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-38-0x0000000077951000-0x0000000077A71000-memory.dmp
memory/4724-43-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-32-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-83-0x0000000036DA0000-0x0000000036DB9000-memory.dmp
memory/4724-84-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-82-0x0000000036DA0000-0x0000000036DB9000-memory.dmp
memory/4724-79-0x0000000036DA0000-0x0000000036DB9000-memory.dmp
memory/4724-31-0x00000000779F5000-0x00000000779F6000-memory.dmp
memory/4724-86-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-87-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-88-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-30-0x00000000779D8000-0x00000000779D9000-memory.dmp
memory/4724-90-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-91-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-92-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-93-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-94-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-95-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-97-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-98-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-99-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-100-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4724-101-0x0000000000820000-0x0000000001A74000-memory.dmp
memory/4948-64-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4948-65-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4948-67-0x0000000000400000-0x0000000000424000-memory.dmp
memory/4948-68-0x0000000000400000-0x0000000000424000-memory.dmp