Analysis
- max time kernel
147s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
05/11/2022, 14:36
General
- Target file.exe
- Size 948KB
- Sample221105-ryphjsadhq
- SHA256 d3b89309f9088554afe3ce791ddb2eb93a4dd1945fcffae7221500514b730791
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
maxlogs.webhop.me:1620
-
9d764268-05c2-4a8e-8c39-b4db356d4640
-
activate_away_mode
true
- backup_connection_host
-
backup_dns_server
8.8.4.4
-
buffer_size
65535
-
build_time
2020-05-29T07:34:04.203922136Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
true
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
1620
-
default_group
x
-
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
9d764268-05c2-4a8e-8c39-b4db356d4640
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
maxlogs.webhop.me
-
primary_dns_server
8.8.8.8
-
request_elevation
true
-
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
- 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.
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of SetThreadContext 1 IoCs
- Drops file in Program Files directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- 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 7 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 14 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\file.exe"C:\Users\Admin\AppData\Local\Temp\file.exe"1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\NFUoaLwrvjn.exe"2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
-
C:\Windows\SysWOW64\schtasks.exe"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NFUoaLwrvjn" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2C5F.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"C:\Windows\Microsoft.NET\Framework\v4.0.30319\MSBuild.exe"2⤵
- Adds Run key to start application
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
Loading Replay Monitor...
Downloads
tmp2C5F.tmp
memory/2916-143-0x0000000000400000-0x0000000000438000-memory.dmp
memory/3716-150-0x0000000006500000-0x000000000651E000-memory.dmp
memory/3716-146-0x0000000005B00000-0x0000000005B66000-memory.dmp
memory/3716-157-0x0000000007570000-0x0000000007578000-memory.dmp
memory/3716-139-0x0000000004980000-0x00000000049B6000-memory.dmp
memory/3716-156-0x0000000007590000-0x00000000075AA000-memory.dmp
memory/3716-142-0x0000000005150000-0x0000000005778000-memory.dmp
memory/3716-155-0x0000000007480000-0x000000000748E000-memory.dmp
memory/3716-154-0x00000000074D0000-0x0000000007566000-memory.dmp
memory/3716-144-0x0000000004F90000-0x0000000004FB2000-memory.dmp
memory/3716-145-0x0000000005780000-0x00000000057E6000-memory.dmp
memory/3716-153-0x00000000072C0000-0x00000000072CA000-memory.dmp
memory/3716-147-0x0000000005F30000-0x0000000005F4E000-memory.dmp
memory/3716-148-0x0000000006520000-0x0000000006552000-memory.dmp
memory/3716-149-0x0000000071550000-0x000000007159C000-memory.dmp
memory/3716-152-0x0000000007250000-0x000000000726A000-memory.dmp
memory/3716-151-0x0000000007890000-0x0000000007F0A000-memory.dmp
memory/3912-132-0x0000000000F10000-0x0000000001004000-memory.dmp
memory/3912-136-0x00000000084C0000-0x000000000855C000-memory.dmp
memory/3912-133-0x0000000005F90000-0x0000000006534000-memory.dmp
memory/3912-134-0x00000000059E0000-0x0000000005A72000-memory.dmp
memory/3912-135-0x00000000059B0000-0x00000000059BA000-memory.dmp