Analysis
- max time kernel
148s - max time network
144s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
02/11/2024, 22:27
General
- Target b879ca5df39408f05fb53326c20cad89dcb01cfa9836beec87c6ceb57527ef28N.exe
- Size 254KB
- Sample241102-2dg8vaxdja
- SHA256 b879ca5df39408f05fb53326c20cad89dcb01cfa9836beec87c6ceb57527ef28
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
sysupdate24.ddns.net:45400
-
ae82ab7f-db07-49ee-9d2b-76075d76f37f
-
activate_away_mode
true
- backup_connection_host
- backup_dns_server
-
buffer_size
65535
-
build_time
2020-04-24T17:41:53.492468936Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
true
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
45400
-
default_group
Default
-
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
ae82ab7f-db07-49ee-9d2b-76075d76f37f
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
sysupdate24.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
Signatures
- NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
- Nanocore family
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 2 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- 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).
- System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Suspicious behavior: EnumeratesProcesses 3 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 11 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\b879ca5df39408f05fb53326c20cad89dcb01cfa9836beec87c6ceb57527ef28N.exe"C:\Users\Admin\AppData\Local\Temp\b879ca5df39408f05fb53326c20cad89dcb01cfa9836beec87c6ceb57527ef28N.exe"1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"2⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"3⤵
- Executes dropped EXE
- Checks whether UAC is enabled
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
a1punf5t2of.exe
memory/1184-22-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1184-1-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1184-2-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1184-3-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1184-4-0x00000000747A2000-0x00000000747A3000-memory.dmp
memory/1184-5-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1184-6-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1184-7-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1184-0-0x00000000747A2000-0x00000000747A3000-memory.dmp
memory/1200-24-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1200-23-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1200-21-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1200-25-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1200-26-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/1200-41-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/3612-33-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/3612-27-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3612-32-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/3612-28-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3612-34-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/3612-36-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/3612-37-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/3612-38-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/3612-39-0x00000000747A0000-0x0000000074D51000-memory.dmp
memory/3612-29-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3612-42-0x00000000747A0000-0x0000000074D51000-memory.dmp