Analysis
- max time kernel
144s - max time network
148s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
06/02/2024, 17:59
General
- Target tmp.exe
- Size 434KB
- Sample240206-wkxdfsecal
- SHA256 7183e7f27a11ea34419d9f8bc7a6be15e98b605d097a4c6672dc8f4998a39742
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
ndichinnenanna0110.ddns.net:7438
-
nworkforcedichinnenanna0110.ddns.net:7438
-
da253b4e-4608-4a43-89fa-2432a8297767
-
activate_away_mode
true
-
backup_connection_host
nworkforcedichinnenanna0110.ddns.net
- backup_dns_server
-
buffer_size
65535
-
build_time
2023-10-31T17:00:08.138850236Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
true
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
7438
-
default_group
workchop
-
enable_debug_mode
true
-
gc_threshold
1.048576e+07
-
keep_alive_timeout
30000
-
keyboard_logging
false
-
lan_timeout
2500
-
max_packet_size
1.048576e+07
-
mutex
da253b4e-4608-4a43-89fa-2432a8297767
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
ndichinnenanna0110.ddns.net
- primary_dns_server
-
request_elevation
true
-
restart_delay
5000
-
run_delay
0
-
run_on_startup
true
-
set_critical_process
true
-
timeout_interval
5000
-
use_custom_dns_server
false
-
version
1.2.2.0
-
wan_timeout
8000
Extracted
-
asyncrat
-
0.5.7B
-
Default
-
ndichinnenanna0110.ddns.net:6839
-
AsyncMutex_6SI8OkPnk
-
delay
3
-
install
false
-
install_folder
%AppData%
Signatures
- AsyncRat
AsyncRAT is designed to remotely monitor and control other computers written in C#.
- NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
- Async RAT payload 1 IoCs
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 3 IoCs
- Loads dropped DLL 9 IoCs
- UPX packed file 5 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Adds Run key to start application 2 TTPs 1 IoCs
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Program crash 2 IoCs
- Checks processor information in registry 2 TTPs 3 IoCs
Processor information is often read in order to detect sandboxing environments.
- Enumerates system info in registry 2 TTPs 4 IoCs
- Modifies Internet Explorer settings 1 TTPs 2 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious behavior: MapViewOfSection 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\tmp.exe"C:\Users\Admin\AppData\Local\Temp\tmp.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of NtCreateThreadExHideFromDebugger
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\ACROBAT_SET-UP.EXE"C:\Users\Admin\AppData\Local\Temp\ACROBAT_SET-UP.EXE"3⤵
- Executes dropped EXE
- Checks processor information in registry
- Enumerates system info in registry
- Modifies Internet Explorer settings
- Suspicious use of SetWindowsHookEx
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 18484⤵
- Program crash
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -u -p 1364 -s 18604⤵
- Program crash
-
-
-
C:\Users\Admin\AppData\Local\Temp\BNANO.EXE"C:\Users\Admin\AppData\Local\Temp\BNANO.EXE"3⤵
- Executes dropped EXE
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Users\Admin\AppData\Local\Temp\ASYBL.EXE"C:\Users\Admin\AppData\Local\Temp\ASYBL.EXE"3⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
-
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1364 -ip 13641⤵
-
C:\Windows\SysWOW64\WerFault.exeC:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 1364 -ip 13641⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
ACROBAT_SET-UP.EXE
ACROBAT_SET-UP.EXE
ACROBAT_SET-UP.EXE
ASYBL.EXE
BNANO.EXE
LangDLL.dll
System.dll
CCDInstaller.js
index.html
memory/1364-119-0x00000000005A0000-0x0000000000F1D000-memory.dmp
memory/1364-74-0x00000000005A0000-0x0000000000F1D000-memory.dmp
memory/1732-39-0x0000000000490000-0x00000000016E4000-memory.dmp
memory/1732-44-0x0000000000490000-0x00000000016E4000-memory.dmp
memory/1732-76-0x0000000000490000-0x00000000016E4000-memory.dmp
memory/1732-37-0x0000000077611000-0x0000000077731000-memory.dmp
memory/1732-36-0x0000000077698000-0x0000000077699000-memory.dmp
memory/2624-127-0x0000000001A30000-0x0000000001A40000-memory.dmp
memory/2624-128-0x0000000071B10000-0x00000000720C1000-memory.dmp
memory/2624-91-0x0000000001A30000-0x0000000001A40000-memory.dmp
memory/2624-92-0x0000000071B10000-0x00000000720C1000-memory.dmp
memory/2624-96-0x0000000071B10000-0x00000000720C1000-memory.dmp
memory/2624-129-0x0000000071B10000-0x00000000720C1000-memory.dmp
memory/2624-118-0x0000000001A30000-0x0000000001A40000-memory.dmp
memory/2624-130-0x0000000001A30000-0x0000000001A40000-memory.dmp
memory/3476-90-0x0000000071360000-0x0000000071B10000-memory.dmp
memory/3476-123-0x00000000051E0000-0x000000000527C000-memory.dmp
memory/3476-125-0x00000000052F0000-0x0000000005356000-memory.dmp
memory/3476-124-0x0000000005830000-0x0000000005DD4000-memory.dmp
memory/3476-120-0x0000000004BE0000-0x0000000004BF0000-memory.dmp
memory/3476-77-0x0000000000310000-0x0000000000322000-memory.dmp
memory/3476-126-0x0000000071360000-0x0000000071B10000-memory.dmp
memory/3476-131-0x0000000004BE0000-0x0000000004BF0000-memory.dmp
memory/4156-35-0x0000000010000000-0x0000000010006000-memory.dmp
memory/4156-34-0x0000000077611000-0x0000000077731000-memory.dmp