Analysis
-
max time kernel
119s -
max time network
121s -
platform
windows10-2004_x64 -
resource
win10v2004-20240709-en -
resource tags
arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system -
submitted
14-07-2024 23:46
Static task
static1
Behavioral task
behavioral1
Sample
4272b5fd4854b198119606db53d662c0N.exe
Resource
win7-20240704-en
General
-
Target
4272b5fd4854b198119606db53d662c0N.exe
-
Size
1.2MB
-
MD5
4272b5fd4854b198119606db53d662c0
-
SHA1
bca8b1849e2895a559697b4b235507548a7a215f
-
SHA256
99d52050a4114f00dc1c23793f5f091004c6749cb4558e5fd6cbd881c63007ad
-
SHA512
331c5d8cdde9ffe9d56a80137c10f42e79e0587d119e395fc4c4c43a15ec9c901bc3d62534a1eb3c43e74d3bdb6cd879d0334c6de8b13e06c8dcfb9be87707c6
-
SSDEEP
24576:XAHnh+eWsN3skA4RV1Hom2KXMmHatoI3fr6j2/2+n/a5o:Kh+ZkldoPK8YatoMYo
Malware Config
Extracted
nanocore
1.2.2.0
213.184.126.143:1993
023e0719-23ff-48a0-a14a-16f92fea10e1
-
activate_away_mode
true
-
backup_connection_host
213.184.126.143
-
backup_dns_server
8.8.4.4
-
buffer_size
65535
-
build_time
2019-01-21T14:43:07.916268436Z
-
bypass_user_account_control
false
-
bypass_user_account_control_data
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
-
clear_access_control
true
-
clear_zone_identifier
false
-
connect_delay
4000
-
connection_port
1993
-
default_group
isreal
-
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
023e0719-23ff-48a0-a14a-16f92fea10e1
-
mutex_timeout
5000
-
prevent_system_sleep
false
-
primary_connection_host
213.184.126.143
-
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
-
Drops startup file 1 IoCs
Processes:
4272b5fd4854b198119606db53d662c0N.exedescription ioc process File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PasswordOnWakeSettingFlyout.url 4272b5fd4854b198119606db53d662c0N.exe -
Adds Run key to start application 2 TTPs 1 IoCs
Processes:
RegAsm.exedescription ioc process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\NAT Subsystem = "C:\\Program Files (x86)\\NAT Subsystem\\natss.exe" RegAsm.exe -
Processes:
RegAsm.exedescription ioc process Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA RegAsm.exe -
Suspicious use of SetThreadContext 1 IoCs
Processes:
4272b5fd4854b198119606db53d662c0N.exedescription pid process target process PID 3820 set thread context of 3028 3820 4272b5fd4854b198119606db53d662c0N.exe RegAsm.exe -
Drops file in Program Files directory 2 IoCs
Processes:
RegAsm.exedescription ioc process File created C:\Program Files (x86)\NAT Subsystem\natss.exe RegAsm.exe File opened for modification C:\Program Files (x86)\NAT Subsystem\natss.exe RegAsm.exe -
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 3104 schtasks.exe 1512 schtasks.exe -
Suspicious behavior: EnumeratesProcesses 3 IoCs
Processes:
RegAsm.exepid process 3028 RegAsm.exe 3028 RegAsm.exe 3028 RegAsm.exe -
Suspicious behavior: GetForegroundWindowSpam 1 IoCs
Processes:
RegAsm.exepid process 3028 RegAsm.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
RegAsm.exedescription pid process Token: SeDebugPrivilege 3028 RegAsm.exe -
Suspicious use of FindShellTrayWindow 3 IoCs
Processes:
4272b5fd4854b198119606db53d662c0N.exepid process 3820 4272b5fd4854b198119606db53d662c0N.exe 3820 4272b5fd4854b198119606db53d662c0N.exe 3820 4272b5fd4854b198119606db53d662c0N.exe -
Suspicious use of SendNotifyMessage 3 IoCs
Processes:
4272b5fd4854b198119606db53d662c0N.exepid process 3820 4272b5fd4854b198119606db53d662c0N.exe 3820 4272b5fd4854b198119606db53d662c0N.exe 3820 4272b5fd4854b198119606db53d662c0N.exe -
Suspicious use of WriteProcessMemory 11 IoCs
Processes:
4272b5fd4854b198119606db53d662c0N.exeRegAsm.exedescription pid process target process PID 3820 wrote to memory of 3028 3820 4272b5fd4854b198119606db53d662c0N.exe RegAsm.exe PID 3820 wrote to memory of 3028 3820 4272b5fd4854b198119606db53d662c0N.exe RegAsm.exe PID 3820 wrote to memory of 3028 3820 4272b5fd4854b198119606db53d662c0N.exe RegAsm.exe PID 3820 wrote to memory of 3028 3820 4272b5fd4854b198119606db53d662c0N.exe RegAsm.exe PID 3820 wrote to memory of 3028 3820 4272b5fd4854b198119606db53d662c0N.exe RegAsm.exe PID 3028 wrote to memory of 3104 3028 RegAsm.exe schtasks.exe PID 3028 wrote to memory of 3104 3028 RegAsm.exe schtasks.exe PID 3028 wrote to memory of 3104 3028 RegAsm.exe schtasks.exe PID 3028 wrote to memory of 1512 3028 RegAsm.exe schtasks.exe PID 3028 wrote to memory of 1512 3028 RegAsm.exe schtasks.exe PID 3028 wrote to memory of 1512 3028 RegAsm.exe schtasks.exe
Processes
-
C:\Users\Admin\AppData\Local\Temp\4272b5fd4854b198119606db53d662c0N.exe"C:\Users\Admin\AppData\Local\Temp\4272b5fd4854b198119606db53d662c0N.exe"1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
-
C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.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
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "NAT Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9D45.tmp"3⤵
- Scheduled Task/Job: Scheduled Task
-
C:\Windows\SysWOW64\schtasks.exe"schtasks.exe" /create /f /tn "NAT Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9DB3.tmp"3⤵
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Matrix ATT&CK v13
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Users\Admin\AppData\Local\Temp\tmp9D45.tmpFilesize
1KB
MD5c6f0625bf4c1cdfb699980c9243d3b22
SHA143de1fe580576935516327f17b5da0c656c72851
SHA2568dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA5129ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969
-
C:\Users\Admin\AppData\Local\Temp\tmp9DB3.tmpFilesize
1KB
MD5c58d37cb49c18f1d7cece3c78ac2f407
SHA1769ed0ea9d5269e1cec7234eaac77da129cc0463
SHA25652cdb418384a912c5b7071c92d7761f0d12250f07dbbb31876eb2e8d65acbae7
SHA5122efcb3eaf050d56ad3d483112303a1543f9fc457119fbca7d81b45d5619c0f1ba706ce96644d4e2055c1b5ada7af13f071495287a775ce234d9125633bf02775
-
memory/3028-0-0x0000000000430000-0x0000000000468000-memory.dmpFilesize
224KB
-
memory/3028-6-0x0000000073A42000-0x0000000073A43000-memory.dmpFilesize
4KB
-
memory/3028-7-0x0000000073A40000-0x0000000073FF1000-memory.dmpFilesize
5.7MB
-
memory/3028-8-0x0000000073A40000-0x0000000073FF1000-memory.dmpFilesize
5.7MB
-
memory/3028-19-0x0000000073A42000-0x0000000073A43000-memory.dmpFilesize
4KB
-
memory/3028-20-0x0000000073A40000-0x0000000073FF1000-memory.dmpFilesize
5.7MB
-
memory/3820-5-0x0000000001710000-0x0000000001711000-memory.dmpFilesize
4KB