nanocore | 92771caca06fe18551b241f2fd3e8d6f53c29d48d0e879c93c5458d9fabd082b

General

Target
INVOICE.pdf.exe
Size 377KB
Sample201109-ej3rq1591s
SHA256 92771caca06fe18551b241f2fd3e8d6f53c29d48d0e879c93c5458d9fabd082b
MD5 bb1c5781336e2d5de359af4170f49201
SHA1 31e82823c806216dd7231140e5c8d51791198c56
SHA512 7329dbea8ebe55ed9896f296ef49f352f9b57b0cd011aa6f3a17c0594f9a128b2b905fd4180dd5e69d1ff77f74641a3930854ffdd9d2e216e7cb2337bae7a1a4
MD5 SHA1 SHA512

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

kachi2020.hopto.org:1918
185.165.153.19:1918

Mutex

d8af0884-edfe-4f5e-9dbe-2b1162970748

Attributes

activate_away_mode
true
backup_connection_host
185.165.153.19
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-02-16T11:38:10.399131136Z
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
1918
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
d8af0884-edfe-4f5e-9dbe-2b1162970748
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
kachi2020.hopto.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

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\SMTP Manager = "C:\\Program Files (x86)\\SMTP Manager\\smtpmgr.exe"	INVOICE.pdf.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	INVOICE.pdf.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 416 set thread context of 3676	416	INVOICE.pdf.exe	75

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Program Files (x86)\SMTP Manager\smtpmgr.exe	INVOICE.pdf.exe
File created	C:\Program Files (x86)\SMTP Manager\smtpmgr.exe	INVOICE.pdf.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
60	schtasks.exe
4068	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3676	INVOICE.pdf.exe
3676	INVOICE.pdf.exe
3676	INVOICE.pdf.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3676	INVOICE.pdf.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3676	INVOICE.pdf.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 416 wrote to memory of 3676	416	INVOICE.pdf.exe	75
PID 416 wrote to memory of 3676	416	INVOICE.pdf.exe	75
PID 416 wrote to memory of 3676	416	INVOICE.pdf.exe	75
PID 416 wrote to memory of 3676	416	INVOICE.pdf.exe	75
PID 416 wrote to memory of 3676	416	INVOICE.pdf.exe	75
PID 416 wrote to memory of 3676	416	INVOICE.pdf.exe	75
PID 416 wrote to memory of 3676	416	INVOICE.pdf.exe	75
PID 416 wrote to memory of 3676	416	INVOICE.pdf.exe	75
PID 3676 wrote to memory of 4068	3676	INVOICE.pdf.exe	76
PID 3676 wrote to memory of 4068	3676	INVOICE.pdf.exe	76
PID 3676 wrote to memory of 4068	3676	INVOICE.pdf.exe	76
PID 3676 wrote to memory of 60	3676	INVOICE.pdf.exe	78
PID 3676 wrote to memory of 60	3676	INVOICE.pdf.exe	78
PID 3676 wrote to memory of 60	3676	INVOICE.pdf.exe	78

C:\Users\Admin\AppData\Local\Temp\INVOICE.pdf.exe
"C:\Users\Admin\AppData\Local\Temp\INVOICE.pdf.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:416
- C:\Users\Admin\AppData\Local\Temp\INVOICE.pdf.exe
  "{path}"
  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
  PID:3676
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Manager" /xml "C:\Users\Admin\AppData\Local\Temp\tmp77B6.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:4068
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "SMTP Manager Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp792E.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:60