Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20260513-en - resource tags
- submitted
08/06/2026, 13:30
General
- Target 88aavn.one.exe
- Size 202KB
- Sample260608-qsaa1aey5v
- SHA256 42096c25d984649b38930437d79ed3bcb3bf8e2e52aea01578fac943b793eafa
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
88aavn.one:443
-
www.88aavn.one:443
-
f10c018d-d34d-4d2c-b1ae-c0002ab06576
-
activate_away_mode
false
-
backup_connection_host
www.88aavn.one
-
backup_dns_server
8.8.4.4
-
buffer_size
65535
-
build_time
2026-03-19T16:11:01.315802736Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
false
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
443
-
default_group
88aa
-
enable_debug_mode
false
-
gc_threshold
1.048576e+07
-
keep_alive_timeout
30000
-
keyboard_logging
false
-
lan_timeout
2500
-
max_packet_size
1.048576e+07
-
mutex
f10c018d-d34d-4d2c-b1ae-c0002ab06576
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
88aavn.one
-
primary_dns_server
8.8.8.8
-
request_elevation
false
-
restart_delay
5000
-
run_delay
0
-
run_on_startup
false
-
set_critical_process
true
-
timeout_interval
5000
-
use_custom_dns_server
false
-
version
1.2.2.0
-
wan_timeout
8000
Signatures
- Family: NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
- Executes dropped EXE 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Checks whether UAC is enabled 1 TTPs 1 IoCs
- Drops file in Program Files directory 3 IoCs
- 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 48 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\88aavn.one.exe"C:\Users\Admin\AppData\Local\Temp\88aavn.one.exe"1⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
C:\Program Files (x86)\DSL Subsystem\dslss.exe"C:\Program Files (x86)\DSL Subsystem\dslss.exe"1⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
dslss.exe
memory/3884-0-0x0000000074971000-0x0000000074972000-memory.dmp
memory/3884-1-0x0000000074970000-0x0000000074F21000-memory.dmp
memory/3884-4-0x0000000074970000-0x0000000074F21000-memory.dmp
memory/3884-11-0x0000000074970000-0x0000000074F21000-memory.dmp
memory/3884-12-0x0000000074970000-0x0000000074F21000-memory.dmp
memory/4112-7-0x0000000074970000-0x0000000074F21000-memory.dmp
memory/4112-8-0x0000000074970000-0x0000000074F21000-memory.dmp
memory/4112-10-0x0000000074970000-0x0000000074F21000-memory.dmp