nanocore | b3a73f1e60eb11ca697316528c85c214e37b734452e8701619a3c3dd3d35be39

Analysis

max time kernel
149s
max time network
151s
platform
windows11-21h2_x64
resource
win11-20260130-en
resource tags

arch:x64arch:x86image:win11-20260130-enlocale:en-usos:windows11-21h2-x64systemwindows
submitted
08/05/2026, 07:48

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General

Target
m-u88.exe
Size 203KB
Sample260508-jnbvpsev2s
SHA256 b3a73f1e60eb11ca697316528c85c214e37b734452e8701619a3c3dd3d35be39
MD5 4dfce0d9e93ea6fe4556132e1354145a
SHA1 7065b180540da4862d547ac60511f9f5412dc9f6
SHA512 d0b54ac63a7381b23002c0522770f7c6c0e67b8226e1052171966b5257b0fc691ebd66582e4149932f9b74b847eaea9374c96e13ced30c7dee8351594c330714
SSDEEP 3072:szEqV6B1jHa6dtJ10jgvzcgi+oG/j9iaMP2s/HIxBwKNdlIhtRSE8KaDtyvLGVQf:sLV6Bta6dtJmakIM5aTw37ax4L2C
TLSH
T1C514CF6677A8492FE2DE867D601212529379C2E39CC3F3EE68D855B34F227E44A071D3
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

m-u88.com:443
www.m-u88.com:443

Mutex

d8f47d2d-4caa-4754-95d2-9632372f48e9

Attributes

activate_away_mode
true
backup_connection_host
www.m-u88.com
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2026-02-17T09:26:14.372263336Z
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
d8f47d2d-4caa-4754-95d2-9632372f48e9
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
m-u88.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
1280	dhcphost.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\DHCP Host = "C:\\Program Files (x86)\\DHCP Host\\dhcphost.exe"	m-u88.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	m-u88.exe

Drops file in Program Files directory 3 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\DHCP Host\dhcphost.exe	m-u88.exe
File opened for modification	C:\Program Files (x86)\DHCP Host\dhcphost.exe	m-u88.exe
File opened for modification	C:\Program Files (x86)\DHCP Host\client.log	dhcphost.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	m-u88.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	m-u88.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	dhcphost.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
5236	schtasks.exe
5324	schtasks.exe

Suspicious behavior: EnumeratesProcesses 51 IoCs

pid	Process
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe
3468	m-u88.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3468	m-u88.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3468	m-u88.exe

Suspicious use of WriteProcessMemory 2 IoCs

description	pid	Process	procid_target
PID 3468 wrote to memory of 5236	3468	m-u88.exe	82
PID 3468 wrote to memory of 5324	3468	m-u88.exe	84

C:\Users\Admin\AppData\Local\Temp\m-u88.exe
"C:\Users\Admin\AppData\Local\Temp\m-u88.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:3468
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "DHCP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp11ED.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:5236
- C:\Windows\SysWOW64\schtasks.exe
  "schtasks.exe" /create /f /tn "DHCP Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp124C.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:5324

C:\Users\Admin\AppData\Local\Temp\m-u88.exe
"C:\Users\Admin\AppData\Local\Temp\m-u88.exe"
1⤵
- System Location Discovery: System Language Discovery
PID:3252

C:\Program Files (x86)\DHCP Host\dhcphost.exe
"C:\Program Files (x86)\DHCP Host\dhcphost.exe"
1⤵
- Executes dropped EXE
- Drops file in Program Files directory
- System Location Discovery: System Language Discovery
PID:1280

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

dhcphost.exe

Path C:\Program Files (x86)\DHCP Host\dhcphost.exe
Size 203KB
SHA256 b3a73f1e60eb11ca697316528c85c214e37b734452e8701619a3c3dd3d35be39
MD5 4dfce0d9e93ea6fe4556132e1354145a
SHA1 7065b180540da4862d547ac60511f9f5412dc9f6
SHA512 d0b54ac63a7381b23002c0522770f7c6c0e67b8226e1052171966b5257b0fc691ebd66582e4149932f9b74b847eaea9374c96e13ced30c7dee8351594c330714
SSDEEP 3072:szEqV6B1jHa6dtJ10jgvzcgi+oG/j9iaMP2s/HIxBwKNdlIhtRSE8KaDtyvLGVQf:sLV6Bta6dtJmakIM5aTw37ax4L2C
TLSH
T1C514CF6677A8492FE2DE867D601212529379C2E39CC3F3EE68D855B34F227E44A071D3
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

tmp11ED.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp11ED.tmp
Size 1KB
SHA256 da5bbd8b7863601be9be51f124c542d6a2e760510a1b7e968fcb49f842949fb8
MD5 cc4315e3d55ed3369f127d8f958203f8
SHA1 7f0ec7c296326ef2443cb2d24b69e11e53deccf1
SHA512 1710af2c9e187bf2ae3cfc0f8c2160153e4131884fc396c557f688e6f9f30b6600c097e9b8818e346f4e3883f13abc840f63d62beddd88937418b46f049774cf
TLSH
T1E521C064ACC0F61F66B19629A39197C2DE2A57A305564138FCCC4E7F3FB6186304356B
MD5 SHA1 SHA512 TLSH

Submit Download

tmp124C.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmp124C.tmp
Size 1KB
SHA256 112557c2b2d0c669a3b115129dc32f005341e965330fa8f2ad3e5de1926594bc
MD5 0479d5f304ef2d7e3c15fb24a99f88c1
SHA1 8edbb1450a656fac5f5e96779ffe440ee8c1aec9
SHA512 537e8d87e5cd975f0e69bb145f81d6e9d7b0d82eed143ac351304ea38577137386a51fdb7357ec6d641eb04ff5f51e249bba2db8a4b5bf2934d561394a4a3f15
TLSH
T13B21D264ACC0F61B66715629A39257C2DF2A97A341564138FCCC4E7F3FB6186304317B
MD5 SHA1 SHA512 TLSH

Submit Download

memory/1280-14-0x0000000074B80000-0x0000000075131000-memory.dmp

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memory/1280-18-0x0000000000D80000-0x0000000000E92000-memory.dmp

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memory/1280-19-0x0000000074B80000-0x0000000075131000-memory.dmp

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memory/3252-20-0x0000000074B80000-0x0000000075131000-memory.dmp

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memory/3252-13-0x0000000074B80000-0x0000000075131000-memory.dmp

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memory/3252-12-0x0000000074B80000-0x0000000075131000-memory.dmp

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memory/3252-17-0x0000000001240000-0x0000000001352000-memory.dmp

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memory/3468-21-0x0000000074B80000-0x0000000075131000-memory.dmp

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memory/3468-9-0x0000000074B80000-0x0000000075131000-memory.dmp

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memory/3468-1-0x0000000074B80000-0x0000000075131000-memory.dmp

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memory/3468-0-0x0000000074B81000-0x0000000074B82000-memory.dmp

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memory/3468-22-0x0000000074B80000-0x0000000075131000-memory.dmp

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memory/3468-23-0x00000000013F0000-0x0000000001502000-memory.dmp

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memory/3468-24-0x00000000013F0000-0x0000000001502000-memory.dmp

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memory/3468-26-0x00000000013F0000-0x0000000001502000-memory.dmp

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memory/3468-35-0x00000000013F0000-0x0000000001502000-memory.dmp

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memory/3468-36-0x00000000013F0000-0x0000000001502000-memory.dmp

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