Analysis
- max time kernel
149s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20240802-en - resource tags
- submitted
02/10/2024, 01:45
General
- Target ?????? - ??????#9553-01.exe
- Size 657KB
- Sample241002-b6fydavdjb
- SHA256 133891fc02269ee06eb3e6ab1f20391fe1486cd5620f766c85b8fceaf223dc84
Malware Config
Extracted
-
remcos
-
RemoteHost
-
172.245.93.118:25000
-
172.245.93.118:26000
-
172.245.93.118:2484
-
172.245.93.118:2700
-
audio_folder
MicRecords
-
audio_record_time
5
-
connect_delay
0
-
connect_interval
1
-
copy_file
remcos.exe
-
copy_folder
Remcos
-
delete_file
false
-
hide_file
false
-
hide_keylog_file
false
-
install_flag
false
-
keylog_crypt
false
-
keylog_file
logs.dat
-
keylog_flag
false
-
keylog_folder
remcos
-
mouse_option
false
-
mutex
Rmc-GFGCCE
-
screenshot_crypt
false
-
screenshot_flag
false
-
screenshot_folder
Screenshots
-
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 11 IoCs
Free utilities often used by attackers which can steal passwords, product keys, etc.
- NirSoft MailPassView 3 IoCs
Password recovery tool for various email clients
- NirSoft WebBrowserPassView 6 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
- 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
-
C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe"C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe"1⤵
- Loads dropped DLL
- 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\______ - ______#9553-01.exe"C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.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\______ - ______#9553-01.exe"C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe" /stext "C:\Users\Admin\AppData\Local\Temp\yarafntl"3⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
-
-
C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe"C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe" /stext "C:\Users\Admin\AppData\Local\Temp\icwlggefdbwp"3⤵
- Accesses Microsoft Outlook accounts
- System Location Discovery: System Language Discovery
-
-
C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe"C:\Users\Admin\AppData\Local\Temp\______ - ______#9553-01.exe" /stext "C:\Users\Admin\AppData\Local\Temp\kwcdhqpgrjouwxl"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
yarafntl
memory/1076-69-0x0000000000400000-0x0000000000424000-memory.dmp
memory/1076-63-0x0000000000400000-0x0000000000424000-memory.dmp
memory/1076-64-0x0000000000400000-0x0000000000424000-memory.dmp
memory/1076-65-0x0000000000400000-0x0000000000424000-memory.dmp
memory/2060-81-0x0000000032E20000-0x0000000032E39000-memory.dmp
memory/2060-85-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-45-0x00000000004A4000-0x00000000004A5000-memory.dmp
memory/2060-43-0x0000000077891000-0x00000000779B1000-memory.dmp
memory/2060-46-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-47-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-48-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-49-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-50-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-86-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-53-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-54-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-55-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-70-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-122-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-121-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-120-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-119-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-118-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-39-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-38-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-37-0x00000000016D0000-0x0000000002120000-memory.dmp
memory/2060-36-0x0000000077935000-0x0000000077936000-memory.dmp
memory/2060-117-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-116-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-115-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-114-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-113-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-112-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-111-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-77-0x0000000032E20000-0x0000000032E39000-memory.dmp
memory/2060-35-0x0000000077918000-0x0000000077919000-memory.dmp
memory/2060-34-0x00000000016D0000-0x0000000002120000-memory.dmp
memory/2060-82-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-80-0x0000000032E20000-0x0000000032E39000-memory.dmp
memory/2060-83-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-44-0x0000000077891000-0x00000000779B1000-memory.dmp
memory/2060-84-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-52-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-88-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-89-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-90-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-91-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-92-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-93-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-94-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-95-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-96-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-97-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-98-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-99-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-100-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-101-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-102-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-104-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-105-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-106-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-107-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-108-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2060-110-0x0000000000470000-0x00000000016C4000-memory.dmp
memory/2792-33-0x00000000051D0000-0x0000000005C20000-memory.dmp
memory/2792-30-0x00000000051D0000-0x0000000005C20000-memory.dmp
memory/2792-32-0x0000000010004000-0x0000000010005000-memory.dmp
memory/2792-31-0x0000000077891000-0x00000000779B1000-memory.dmp
memory/2792-125-0x00000000051D0000-0x0000000005C20000-memory.dmp
memory/3040-61-0x0000000000400000-0x0000000000478000-memory.dmp
memory/3040-57-0x0000000000400000-0x0000000000478000-memory.dmp
memory/3040-74-0x0000000000400000-0x0000000000478000-memory.dmp
memory/3040-56-0x0000000000400000-0x0000000000478000-memory.dmp
memory/4896-60-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4896-59-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4896-62-0x0000000000400000-0x0000000000462000-memory.dmp
memory/4896-58-0x0000000000400000-0x0000000000462000-memory.dmp