Analysis
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max time kernel
120s -
max time network
120s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
03-01-2025 22:30
General
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Target
cf34a3b9fc76aab3060244b6356bcc5e9230e3e4040d05d860b0f78a9e51ef7aN.exe
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Size
1.0MB
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MD5
a13c2dfd756f3e587eea33c9b67ec3f0
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SHA1
cac547316f234eb1c322a708fad32dcf90f69aa5
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SHA256
cf34a3b9fc76aab3060244b6356bcc5e9230e3e4040d05d860b0f78a9e51ef7a
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SHA512
7d73370c9576dc42ef82039d170bede123ef7c42752b64d95bdf1abcaad6916dde18a42726a0fe93a83d7876ac68674a09242a41a46fa00911a95a5f0e41d852
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SSDEEP
24576:Jur9gkEPGcHHXYDYDa6naGhywpCjq7jUv7cF6kZ6YriDfZ49p50/Y:Ur9gNGKXYD+naGEsBXUv66k8o4yp5wY
Malware Config
Extracted
nanocore
1.2.2.0
testwork.kozow.com:8906
bd6fc7b5-d48b-4e23-98f7-784bd3ef305c
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activate_away_mode
true
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backup_connection_host
testwork.kozow.com
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backup_dns_server
8.8.4.4
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buffer_size
65535
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build_time
2019-02-16T16:47:25.218235636Z
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bypass_user_account_control
true
- bypass_user_account_control_data
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clear_access_control
true
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clear_zone_identifier
false
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connect_delay
4000
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connection_port
8906
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default_group
star
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enable_debug_mode
true
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gc_threshold
1.048576e+07
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keep_alive_timeout
30000
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keyboard_logging
false
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lan_timeout
2500
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max_packet_size
1.048576e+07
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mutex
bd6fc7b5-d48b-4e23-98f7-784bd3ef305c
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mutex_timeout
5000
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prevent_system_sleep
false
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primary_connection_host
testwork.kozow.com
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primary_dns_server
8.8.8.8
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request_elevation
true
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restart_delay
5000
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run_delay
0
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run_on_startup
true
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set_critical_process
true
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timeout_interval
5000
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use_custom_dns_server
false
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version
1.2.2.0
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wan_timeout
8000
Signatures
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NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
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Nanocore family
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Drops startup file 1 IoCs
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Checks whether UAC is enabled 1 TTPs 1 IoCs
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AutoIT Executable 12 IoCs
AutoIT scripts compiled to PE executables.
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Suspicious use of SetThreadContext 1 IoCs
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UPX packed file 13 IoCs
Detects executables packed with UPX/modified UPX open source packer.
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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.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
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Suspicious behavior: GetForegroundWindowSpam 1 IoCs
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Suspicious use of AdjustPrivilegeToken 1 IoCs
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Suspicious use of FindShellTrayWindow 3 IoCs
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Suspicious use of SendNotifyMessage 3 IoCs
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Suspicious use of WriteProcessMemory 5 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\cf34a3b9fc76aab3060244b6356bcc5e9230e3e4040d05d860b0f78a9e51ef7aN.exe"C:\Users\Admin\AppData\Local\Temp\cf34a3b9fc76aab3060244b6356bcc5e9230e3e4040d05d860b0f78a9e51ef7aN.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
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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
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
4KB
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
4KB
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Filesize
1.7MB
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Filesize
1.7MB
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Filesize
5.7MB
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Filesize
224KB
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Filesize
4KB
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Filesize
5.7MB
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Filesize
4KB
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Filesize
5.7MB
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Filesize
5.7MB