Analysis
- max time kernel
146s - max time network
150s - platform
windows10_x64 - resource
win10v200722 - submitted
15/10/2020, 13:19
General
- Target R2ERChVU88T7UYn.exe
- Size 593KB
- Sample201015-2kxkh81ftn
- SHA256 54deeaeed632cdef34ba67c7b879e8c88ad5d19675cd69e613f663e9bcb3c51f
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
185.231.113.86:1604
-
mavennezeliora123.ddns.net:1604
-
acf00934-90d7-41af-9552-66eabfd39e9f
-
activate_away_mode
true
-
backup_connection_host
mavennezeliora123.ddns.net
-
backup_dns_server
8.8.4.4
-
buffer_size
65535
-
build_time
2020-07-26T11:09:01.734414336Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
true
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
1604
-
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
acf00934-90d7-41af-9552-66eabfd39e9f
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
185.231.113.86
-
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.
- 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
- Drops file in Program Files directory 2 IoCs
- 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 9 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\R2ERChVU88T7UYn.exe"C:\Users\Admin\AppData\Local\Temp\R2ERChVU88T7UYn.exe"1⤵
- 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\jNwuhxdjagB" /XML "C:\Users\Admin\AppData\Local\Temp\tmp8BC6.tmp"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Local\Temp\R2ERChVU88T7UYn.exe"C:\Users\Admin\AppData\Local\Temp\R2ERChVU88T7UYn.exe"2⤵
-
-
C:\Users\Admin\AppData\Local\Temp\R2ERChVU88T7UYn.exe"C:\Users\Admin\AppData\Local\Temp\R2ERChVU88T7UYn.exe"2⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
memory/500-11-0x0000000008E60000-0x0000000008ECA000-memory.dmp
memory/500-12-0x0000000008ED0000-0x0000000008F05000-memory.dmp
memory/500-5-0x00000000083E0000-0x00000000083E1000-memory.dmp
memory/500-6-0x0000000007EE0000-0x0000000007EE1000-memory.dmp
memory/500-7-0x0000000007FA0000-0x0000000007FA1000-memory.dmp
memory/500-8-0x0000000008010000-0x0000000008011000-memory.dmp
memory/500-9-0x00000000088E0000-0x00000000088E1000-memory.dmp
memory/500-10-0x0000000008000000-0x000000000800B000-memory.dmp
memory/500-0-0x0000000073A60000-0x000000007414E000-memory.dmp
memory/500-4-0x0000000007E40000-0x0000000007E41000-memory.dmp
memory/500-1-0x0000000000C20000-0x0000000000C21000-memory.dmp
memory/500-3-0x0000000003120000-0x0000000003190000-memory.dmp
memory/2704-15-0x0000000000400000-0x0000000000438000-memory.dmp
memory/2704-18-0x0000000073A60000-0x000000007414E000-memory.dmp
memory/2704-25-0x0000000004F70000-0x0000000004F75000-memory.dmp
memory/2704-26-0x0000000004F80000-0x0000000004F99000-memory.dmp
memory/2704-27-0x0000000005CC0000-0x0000000005CC3000-memory.dmp