nanocore | 39dc3a88f6948d7740c6260cdabb5affccf9bcf4da744c4cc44cf674950c7c49

General

Target
Order BDA-01826346_pdf.exe
Size 399KB
Sample200624-pdacnzbqea
SHA256 39dc3a88f6948d7740c6260cdabb5affccf9bcf4da744c4cc44cf674950c7c49
MD5 2cd7f015eabf7e256f3795e5a2e5fa08
SHA1 4fb81ca0b2471c4df1da1d15c8c5f1eb1debfc27
SHA512 7560528260433cdcd4e300946a1ac82d2d154842bf8de385da6b9c20923ebd8ba00ae5a260c19648ed0b8bc89c42cc2286971f2934d36faf4bb1ff5977723fca
MD5 SHA1 SHA512

Score

10^/10

persistence evasion trojan keylogger stealer spyware nanocore

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

summersyz.duckdns.org:4532

Mutex

309e424a-d779-4244-b06a-04ef33efd9ed

Attributes

activate_away_mode
false
backup_connection_host
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-03-28T18:09:01.859374836Z
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
4532
default_group
numbawan
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
309e424a-d779-4244-b06a-04ef33efd9ed
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
summersyz.duckdns.org
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.
keylogger trojan stealer spyware nanocore

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
1344	Order BDA-01826346_pdf.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1424	InstallUtil.exe

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	Order BDA-01826346_pdf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Order BDA-01826346_pdf.exe

Adds Run entry to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1131729243-447456001-3632642222-1000\Software\Microsoft\Windows\CurrentVersion\Run\OiOGP = "C:\\AVGLFESB\\OiOGPY\\OiOGPYbnO.vbs"	Order BDA-01826346_pdf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\WAN Subsystem = "C:\\Program Files (x86)\\WAN Subsystem\\wanss.exe"	InstallUtil.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	InstallUtil.exe

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\WAN Subsystem\wanss.exe	InstallUtil.exe
File opened for modification	C:\Program Files (x86)\WAN Subsystem\wanss.exe	InstallUtil.exe

Creates scheduled task(s) 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

T1053

pid	Process
340	schtasks.exe
1056	schtasks.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 1344 wrote to memory of 1424	1344	Order BDA-01826346_pdf.exe	24
PID 1344 wrote to memory of 1424	1344	Order BDA-01826346_pdf.exe	24
PID 1344 wrote to memory of 1424	1344	Order BDA-01826346_pdf.exe	24
PID 1344 wrote to memory of 1424	1344	Order BDA-01826346_pdf.exe	24
PID 1344 wrote to memory of 1424	1344	Order BDA-01826346_pdf.exe	24
PID 1344 wrote to memory of 1424	1344	Order BDA-01826346_pdf.exe	24
PID 1344 wrote to memory of 1424	1344	Order BDA-01826346_pdf.exe	24
PID 1344 wrote to memory of 1424	1344	Order BDA-01826346_pdf.exe	24
PID 1424 wrote to memory of 340	1424	InstallUtil.exe	25
PID 1424 wrote to memory of 340	1424	InstallUtil.exe	25
PID 1424 wrote to memory of 340	1424	InstallUtil.exe	25
PID 1424 wrote to memory of 340	1424	InstallUtil.exe	25
PID 1424 wrote to memory of 1056	1424	InstallUtil.exe	27
PID 1424 wrote to memory of 1056	1424	InstallUtil.exe	27
PID 1424 wrote to memory of 1056	1424	InstallUtil.exe	27
PID 1424 wrote to memory of 1056	1424	InstallUtil.exe	27

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1344 set thread context of 1424	1344	Order BDA-01826346_pdf.exe	24

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1424	InstallUtil.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
1424	InstallUtil.exe
1424	InstallUtil.exe

C:\Users\Admin\AppData\Local\Temp\Order BDA-01826346_pdf.exe
"C:\Users\Admin\AppData\Local\Temp\Order BDA-01826346_pdf.exe"
1⤵
- Suspicious behavior: MapViewOfSection
- Maps connected drives based on registry
- Adds Run entry to start application
- Suspicious use of WriteProcessMemory
- Suspicious use of SetThreadContext
PID:1344
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\InstallUtil.exe
  "C:\Windows\\Microsoft.NET\\Framework\\v2.0.50727\\InstallUtil.exe"
  2⤵
  - Suspicious behavior: GetForegroundWindowSpam
  - Adds Run entry to start application
  - Checks whether UAC is enabled
  - Drops file in Program Files directory
  - Suspicious use of WriteProcessMemory
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious behavior: EnumeratesProcesses
  PID:1424
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "WAN Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp39A5.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:340
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "WAN Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp3B0D.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:1056