Analysis
- max time kernel
120s - max time network
119s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
25/01/2025, 02:28
General
- Target 233a67525929cd83a9a12900ab8f4df715a18cdfb5e49be072037d9567da0d29N.exe
- Size 1.0MB
- Sample250125-cygels1lay
- SHA256 233a67525929cd83a9a12900ab8f4df715a18cdfb5e49be072037d9567da0d29
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
testwork.kozow.com:8906
-
bd6fc7b5-d48b-4e23-98f7-784bd3ef305c
-
activate_away_mode
true
-
backup_connection_host
testwork.kozow.com
-
backup_dns_server
8.8.4.4
-
buffer_size
65535
-
build_time
2019-02-16T16:47:25.218235636Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
true
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
8906
-
default_group
star
-
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
bd6fc7b5-d48b-4e23-98f7-784bd3ef305c
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
testwork.kozow.com
-
primary_dns_server
8.8.8.8
-
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
Signatures
- NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
- Nanocore family
- Drops startup file 1 IoCs
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- AutoIT Executable 12 IoCs
AutoIT scripts compiled to PE executables.
- Suspicious use of SetThreadContext 1 IoCs
- UPX packed file 13 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- System Location Discovery: System Language Discovery 1 TTPs 2 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 64 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of FindShellTrayWindow 3 IoCs
- Suspicious use of SendNotifyMessage 3 IoCs
- Suspicious use of WriteProcessMemory 5 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\233a67525929cd83a9a12900ab8f4df715a18cdfb5e49be072037d9567da0d29N.exe"C:\Users\Admin\AppData\Local\Temp\233a67525929cd83a9a12900ab8f4df715a18cdfb5e49be072037d9567da0d29N.exe"1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"2⤵
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
memory/1188-19-0x0000000073862000-0x0000000073863000-memory.dmp
memory/1188-21-0x0000000073860000-0x0000000073E11000-memory.dmp
memory/1188-7-0x0000000000400000-0x0000000000438000-memory.dmp
memory/1188-12-0x0000000073862000-0x0000000073863000-memory.dmp
memory/1188-13-0x0000000073860000-0x0000000073E11000-memory.dmp
memory/1188-20-0x0000000073860000-0x0000000073E11000-memory.dmp
memory/1188-15-0x0000000073860000-0x0000000073E11000-memory.dmp
memory/4860-14-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-24-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-17-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-0-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-6-0x0000000001D60000-0x0000000001D61000-memory.dmp
memory/4860-22-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-23-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-18-0x0000000001D60000-0x0000000001D61000-memory.dmp
memory/4860-25-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-26-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-27-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-28-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-29-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-30-0x0000000000460000-0x0000000000611000-memory.dmp
memory/4860-31-0x0000000000460000-0x0000000000611000-memory.dmp