Analysis
- max time kernel
153s - max time network
156s - platform
windows10_x64 - resource
win10v20210408 - submitted
23/08/2021, 06:18
General
- Target d703b3cc46820009bb6c4ab14666ea9e.exe
- Size 1.1MB
- Sample210823-b6sbdn3c4e
- SHA256 f089621fa865a1406a660945a8376953b51dee4e39b1d7cde0ca17b27a0ac7eb
Malware Config
Extracted
-
nanocore
-
1.2.2.0
-
rebornx.duckdns.org:7744
-
77e2bfe5-f7e0-4fab-a9ff-9902b347ae92
-
activate_away_mode
true
-
backup_connection_host
rebornx.duckdns.org
- backup_dns_server
-
buffer_size
65535
-
build_time
2021-02-14T00:06:22.574821336Z
-
bypass_user_account_control
true
- bypass_user_account_control_data
-
clear_access_control
true
-
clear_zone_identifier
true
-
connect_delay
4000
-
connection_port
7744
-
default_group
REBORN
-
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
77e2bfe5-f7e0-4fab-a9ff-9902b347ae92
-
mutex_timeout
5000
-
prevent_system_sleep
true
-
primary_connection_host
rebornx.duckdns.org
- primary_dns_server
-
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.
- Executes dropped EXE 1 IoCs
- Obfuscated with Agile.Net obfuscator 1 IoCs
Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.
- 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
- Suspicious behavior: EnumeratesProcesses 5 IoCs
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 8 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\d703b3cc46820009bb6c4ab14666ea9e.exe"C:\Users\Admin\AppData\Local\Temp\d703b3cc46820009bb6c4ab14666ea9e.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"C:\Users\Admin\AppData\Local\Temp\RegAsm.exe"2⤵
- Executes dropped EXE
- 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/3524-141-0x00000000050A0000-0x00000000050A3000-memory.dmp
memory/3524-140-0x0000000004DA0000-0x0000000004DB9000-memory.dmp
memory/3524-139-0x0000000004B60000-0x0000000004B65000-memory.dmp
memory/3524-138-0x0000000004BD0000-0x00000000050CE000-memory.dmp
memory/3524-137-0x0000000004A40000-0x0000000004A41000-memory.dmp
memory/3524-132-0x00000000005A0000-0x00000000005D8000-memory.dmp
memory/4016-120-0x00000000059D0000-0x00000000059D1000-memory.dmp
memory/4016-125-0x0000000004F51000-0x0000000004F52000-memory.dmp
memory/4016-126-0x0000000006CE0000-0x0000000006CEB000-memory.dmp
memory/4016-127-0x0000000006CF0000-0x0000000006CF1000-memory.dmp
memory/4016-124-0x0000000006FA0000-0x0000000006FA1000-memory.dmp
memory/4016-123-0x0000000006FD0000-0x0000000006FD1000-memory.dmp
memory/4016-122-0x0000000006E10000-0x0000000006E31000-memory.dmp
memory/4016-121-0x0000000004F50000-0x0000000004F51000-memory.dmp
memory/4016-114-0x00000000005E0000-0x00000000005E1000-memory.dmp
memory/4016-119-0x0000000005F00000-0x0000000005F01000-memory.dmp
memory/4016-118-0x0000000005070000-0x0000000005071000-memory.dmp
memory/4016-117-0x0000000004FD0000-0x0000000004FD1000-memory.dmp
memory/4016-116-0x00000000054D0000-0x00000000054D1000-memory.dmp