Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20231222-en - resource tags
- submitted
05/02/2024, 11:53
General
- Target 91ec5f7f539d09cf4798daf06a73152a.exe
- Size 852KB
- Sample240205-n2aa9afag7
- SHA256 a8c2ff91bf3c1e2788e75b378238e0246278877ebf225dc1f98167d6c9f87574
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
mec.sytes.net:3259
-
9358a53f-433c-42f5-bd3f-14ae4da528cf
-
activate_away_mode
true
-
backup_connection_host
mec.sytes.net
-
backup_dns_server
8.8.4.4
-
buffer_size
65535
-
build_time
2021-04-04T14:41:53.527071936Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
true
-
clear_zone_identifier
true
-
connect_delay
4000
-
connection_port
3259
-
default_group
Mine
-
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
9358a53f-433c-42f5-bd3f-14ae4da528cf
-
mutex_timeout
5000
-
prevent_system_sleep
true
-
primary_connection_host
mec.sytes.net
-
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.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\91ec5f7f539d09cf4798daf06a73152a.exe"C:\Users\Admin\AppData\Local\Temp\91ec5f7f539d09cf4798daf06a73152a.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\aYSbXSSAVP" /XML "C:\Users\Admin\AppData\Local\Temp\tmpCC58.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\91ec5f7f539d09cf4798daf06a73152a.exe"{path}"2⤵
-
-
C:\Users\Admin\AppData\Local\Temp\91ec5f7f539d09cf4798daf06a73152a.exe"{path}"2⤵
- Checks whether UAC is enabled
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\Microsoft.Net\Framework64\v3.0\WPF\PresentationFontCache.exeC:\Windows\Microsoft.Net\Framework64\v3.0\WPF\PresentationFontCache.exe1⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
91ec5f7f539d09cf4798daf06a73152a.exe.log
tmpCC58.tmp
memory/1132-29-0x00000000010C0000-0x00000000010D0000-memory.dmp
memory/1132-28-0x00000000010C0000-0x00000000010D0000-memory.dmp
memory/1132-27-0x0000000074C30000-0x00000000751E1000-memory.dmp
memory/1132-26-0x00000000010C0000-0x00000000010D0000-memory.dmp
memory/1132-24-0x0000000074C30000-0x00000000751E1000-memory.dmp
memory/1132-23-0x0000000074C30000-0x00000000751E1000-memory.dmp
memory/1132-19-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2708-6-0x000000001A6D0000-0x000000001AAA4000-memory.dmp
memory/2708-7-0x00007FF9FEE40000-0x00007FF9FF7E1000-memory.dmp
memory/2708-3-0x00000000011A0000-0x00000000011C0000-memory.dmp
memory/2708-12-0x00007FF9FEE40000-0x00007FF9FF7E1000-memory.dmp
memory/2708-13-0x0000000001230000-0x0000000001240000-memory.dmp
memory/2708-14-0x0000000001230000-0x0000000001240000-memory.dmp
memory/2708-5-0x0000000001230000-0x0000000001240000-memory.dmp
memory/2708-9-0x0000000001230000-0x0000000001240000-memory.dmp
memory/2708-8-0x000000001ADB0000-0x000000001AEE6000-memory.dmp
memory/2708-4-0x00007FF9FEE40000-0x00007FF9FF7E1000-memory.dmp
memory/5100-0-0x0000000074C30000-0x00000000751E1000-memory.dmp
memory/5100-10-0x0000000074C30000-0x00000000751E1000-memory.dmp
memory/5100-22-0x0000000074C30000-0x00000000751E1000-memory.dmp
memory/5100-15-0x0000000000EA0000-0x0000000000EB0000-memory.dmp
memory/5100-11-0x0000000000EA0000-0x0000000000EB0000-memory.dmp
memory/5100-1-0x0000000074C30000-0x00000000751E1000-memory.dmp
memory/5100-2-0x0000000000EA0000-0x0000000000EB0000-memory.dmp