nanocore | 691b6b56ca1bb9cbd0fba91cc2743c491ed4903c6a3e98ec1db4412d9b08e4a2

Analysis

max time kernel
149s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20260130-en
resource tags

arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
submitted
08/05/2026, 08:35

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General

Target
kno77.it.com.exe
Size 203KB
Sample260508-khc19aey3w
SHA256 691b6b56ca1bb9cbd0fba91cc2743c491ed4903c6a3e98ec1db4412d9b08e4a2
MD5 c1f45f0d5f4d06e94e5b8a7f0cbbb1e6
SHA1 433e5a71a38a5e6cfaef1b1766c3d539e592ddd3
SHA512 79ee3d00e72caa45da3e1cdc62730afd21da83c31e4bf6e85ea9f9a4f2317e22baa6f0748eacbc317a5cd5b62e8b79a44a7b39da4fcb03831af7d9be364834d1
SSDEEP 6144:MLV6Bta6dtJmakIM5nplNzULgm7SB7e+U:MLV6BtpmkAzcb87eN
TLSH
T11D14CF257BB94A3EE2DE8679612202179378C2E3EDC3F3DA58D454B75B267E40A070D3
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

defense_evasion discovery execution nanocore keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

kno77.it.com:443
www.kno77.it.com:443

Mutex

c452e3b7-79e1-4830-9ecc-829b374545c8

Attributes

activate_away_mode
true
backup_connection_host
www.kno77.it.com
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2026-02-16T16:03:16.438047536Z
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
443
default_group
au88
enable_debug_mode
false
gc_threshold
1.048576e+07
keep_alive_timeout
30000
keyboard_logging
false
lan_timeout
2500
max_packet_size
1.048576e+07
mutex
c452e3b7-79e1-4830-9ecc-829b374545c8
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
kno77.it.com
primary_dns_server
8.8.8.8
request_elevation
false
restart_delay
5000
run_delay
9
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

Family: NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore

Executes dropped EXE 1 IoCs

pid	Process
2368	smtpsv.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\SMTP Service = "C:\\Program Files (x86)\\SMTP Service\\smtpsv.exe"	kno77.it.com.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	kno77.it.com.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\SMTP Service\smtpsv.exe	kno77.it.com.exe
File opened for modification	C:\Program Files (x86)\SMTP Service\smtpsv.exe	kno77.it.com.exe
File opened for modification	C:\Program Files (x86)\SMTP Service\client.log	smtpsv.exe

System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kno77.it.com.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	smtpsv.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	kno77.it.com.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

persistence execution

Scheduled Task

T1053.005

pid	Process
2512	schtasks.exe
5700	schtasks.exe

Suspicious behavior: EnumeratesProcesses 15 IoCs

pid	Process
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe
4748	kno77.it.com.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4748	kno77.it.com.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4748	kno77.it.com.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 4748 wrote to memory of 2512	4748	kno77.it.com.exe	87
PID 4748 wrote to memory of 5700	4748	kno77.it.com.exe	89

C:\Users\Admin\AppData\Local\Temp\kno77.it.com.exe
"C:\Users\Admin\AppData\Local\Temp\kno77.it.com.exe"
1⤵
- Adds Run key to start application
- Checks whether UAC is enabled
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4748
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "SMTP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp42FF.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2512
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "SMTP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp435E.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:5700

C:\Program Files (x86)\SMTP Service\smtpsv.exe
"C:\Program Files (x86)\SMTP Service\smtpsv.exe"
1⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:2368

C:\Users\Admin\AppData\Local\Temp\kno77.it.com.exe
"C:\Users\Admin\AppData\Local\Temp\kno77.it.com.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:1032

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

smtpsv.exe

Path C:\Program Files (x86)\SMTP Service\smtpsv.exe
Size 203KB
SHA256 691b6b56ca1bb9cbd0fba91cc2743c491ed4903c6a3e98ec1db4412d9b08e4a2
MD5 c1f45f0d5f4d06e94e5b8a7f0cbbb1e6
SHA1 433e5a71a38a5e6cfaef1b1766c3d539e592ddd3
SHA512 79ee3d00e72caa45da3e1cdc62730afd21da83c31e4bf6e85ea9f9a4f2317e22baa6f0748eacbc317a5cd5b62e8b79a44a7b39da4fcb03831af7d9be364834d1
SSDEEP 6144:MLV6Bta6dtJmakIM5nplNzULgm7SB7e+U:MLV6BtpmkAzcb87eN
TLSH
T11D14CF257BB94A3EE2DE8679612202179378C2E3EDC3F3DA58D454B75B267E40A070D3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tmp42FF.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp42FF.tmp
Size 1KB
SHA256 dfaca9d638bc34431c9795c213f94bdaf4ad578f6998a7fe89402cd1a7c197b3
MD5 581a928930fff448e3da248bacfc9778
SHA1 724580f32830db3bc600df6fe8123887a72036dc
SHA512 dde68aeb2b15a2d3ffaf696f2cf0c60ce96405704f33754812c1e9a5d5fb535fce61f80516ba5dd34bf4154c526b151f084f9ee4afb9d78c00719403f28dad1d
TLSH
T10221E064ACC0F61F6671462AA79197C2DE2A87A301164138FCCC4E7F3FB6186304316B
MD5 SHA1 SHA512 TLSH

Submit Download

tmp435E.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp435E.tmp
Size 1KB
SHA256 6fe1bdf3d1dedec102ac61b47fff909c53e0df8903098c52f3843b1e11a2d863
MD5 1129270510286b9e8bae6dc678757352
SHA1 f8f3af28a182023adb3efaaa79d034f399ec16d3
SHA512 cec6863e4d3a431668cb2aa2fd6bbd032a3e1cc61698fcd9fe952fcffc6ebda0a87ead9090767365a473c143c8b32fd269a4af03454d0f34858252c4b767844f
TLSH
T17C21C068ACC0F65B66B15625A39157C2DF2A97A301664138FCCC4E7F2FB6186304316B
MD5 SHA1 SHA512 TLSH

Submit Download

memory/1032-14-0x00000000751A0000-0x0000000075751000-memory.dmp

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memory/1032-20-0x00000000751A0000-0x0000000075751000-memory.dmp

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memory/1032-15-0x00000000751A0000-0x0000000075751000-memory.dmp

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memory/2368-19-0x00000000751A0000-0x0000000075751000-memory.dmp

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memory/2368-13-0x00000000751A0000-0x0000000075751000-memory.dmp

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memory/2368-12-0x00000000751A0000-0x0000000075751000-memory.dmp

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memory/4748-9-0x00000000751A0000-0x0000000075751000-memory.dmp

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memory/4748-16-0x00000000007D0000-0x00000000007E0000-memory.dmp

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memory/4748-1-0x00000000751A2000-0x00000000751A4000-memory.dmp

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memory/4748-0-0x00000000007D0000-0x00000000007E0000-memory.dmp

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memory/4748-21-0x00000000751A2000-0x00000000751A4000-memory.dmp

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memory/4748-22-0x00000000751A0000-0x0000000075751000-memory.dmp

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memory/4748-23-0x00000000065D0000-0x00000000065D6000-memory.dmp

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