nanocore | aac8efdfd3ceabbb6c37bd91950f63f7fa1575c90f8398cb4d4296f8fedc036c

General

Target
catzx.exe
Size 991KB
Sample220314-mntbjaecf4
SHA256 aac8efdfd3ceabbb6c37bd91950f63f7fa1575c90f8398cb4d4296f8fedc036c
MD5 9ef7e77867944283665cfd0b81e8955a
SHA1 7048646703f06c2fdf7bb65e998a86c4efd181a1
SHA512 bc2df350b3bf8279a82df9c59eddea1efd38c72375966674da25d78c38df9012a41671fb4d427d7b7014bf9ed1d6e07b1b0339f3382437b286b10e6e2f92a94b
MD5 SHA1 SHA512

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

btmebd.ddns.net:1665

Mutex

997b2c1a-0c4c-4fa2-8ed2-8ee329494ba9

Attributes

activate_away_mode
true
backup_connection_host
btmebd.ddns.net
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2021-12-24T09:51:42.984641036Z
bypass_user_account_control
false
bypass_user_account_control_data
PD94bWwgdmVyc2lvbj0iMS4wIiBlbmNvZGluZz0iVVRGLTE2Ij8+DQo8VGFzayB2ZXJzaW9uPSIxLjIiIHhtbG5zPSJodHRwOi8vc2NoZW1hcy5taWNyb3NvZnQuY29tL3dpbmRvd3MvMjAwNC8wMi9taXQvdGFzayI+DQogIDxSZWdpc3RyYXRpb25JbmZvIC8+DQogIDxUcmlnZ2VycyAvPg0KICA8UHJpbmNpcGFscz4NCiAgICA8UHJpbmNpcGFsIGlkPSJBdXRob3IiPg0KICAgICAgPExvZ29uVHlwZT5JbnRlcmFjdGl2ZVRva2VuPC9Mb2dvblR5cGU+DQogICAgICA8UnVuTGV2ZWw+SGlnaGVzdEF2YWlsYWJsZTwvUnVuTGV2ZWw+DQogICAgPC9QcmluY2lwYWw+DQogIDwvUHJpbmNpcGFscz4NCiAgPFNldHRpbmdzPg0KICAgIDxNdWx0aXBsZUluc3RhbmNlc1BvbGljeT5QYXJhbGxlbDwvTXVsdGlwbGVJbnN0YW5jZXNQb2xpY3k+DQogICAgPERpc2FsbG93U3RhcnRJZk9uQmF0dGVyaWVzPmZhbHNlPC9EaXNhbGxvd1N0YXJ0SWZPbkJhdHRlcmllcz4NCiAgICA8U3RvcElmR29pbmdPbkJhdHRlcmllcz5mYWxzZTwvU3RvcElmR29pbmdPbkJhdHRlcmllcz4NCiAgICA8QWxsb3dIYXJkVGVybWluYXRlPnRydWU8L0FsbG93SGFyZFRlcm1pbmF0ZT4NCiAgICA8U3RhcnRXaGVuQXZhaWxhYmxlPmZhbHNlPC9TdGFydFdoZW5BdmFpbGFibGU+DQogICAgPFJ1bk9ubHlJZk5ldHdvcmtBdmFpbGFibGU+ZmFsc2U8L1J1bk9ubHlJZk5ldHdvcmtBdmFpbGFibGU+DQogICAgPElkbGVTZXR0aW5ncz4NCiAgICAgIDxTdG9wT25JZGxlRW5kPmZhbHNlPC9TdG9wT25JZGxlRW5kPg0KICAgICAgPFJlc3RhcnRPbklkbGU+ZmFsc2U8L1Jlc3RhcnRPbklkbGU+DQogICAgPC9JZGxlU2V0dGluZ3M+DQogICAgPEFsbG93U3RhcnRPbkRlbWFuZD50cnVlPC9BbGxvd1N0YXJ0T25EZW1hbmQ+DQogICAgPEVuYWJsZWQ+dHJ1ZTwvRW5hYmxlZD4NCiAgICA8SGlkZGVuPmZhbHNlPC9IaWRkZW4+DQogICAgPFJ1bk9ubHlJZklkbGU+ZmFsc2U8L1J1bk9ubHlJZklkbGU+DQogICAgPFdha2VUb1J1bj5mYWxzZTwvV2FrZVRvUnVuPg0KICAgIDxFeGVjdXRpb25UaW1lTGltaXQ+UFQwUzwvRXhlY3V0aW9uVGltZUxpbWl0Pg0KICAgIDxQcmlvcml0eT40PC9Qcmlvcml0eT4NCiAgPC9TZXR0aW5ncz4NCiAgPEFjdGlvbnMgQ29udGV4dD0iQXV0aG9yIj4NCiAgICA8RXhlYz4NCiAgICAgIDxDb21tYW5kPiIjRVhFQ1VUQUJMRVBBVEgiPC9Db21tYW5kPg0KICAgICAgPEFyZ3VtZW50cz4kKEFyZzApPC9Bcmd1bWVudHM+DQogICAgPC9FeGVjPg0KICA8L0FjdGlvbnM+DQo8L1Rhc2s+
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
1665
default_group
GOOD
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
997b2c1a-0c4c-4fa2-8ed2-8ee329494ba9
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
btmebd.ddns.net
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\ISS Monitor = "C:\\Program Files (x86)\\ISS Monitor\\issmon.exe"	catzx.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	catzx.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1996 set thread context of 1604	1996	catzx.exe	90

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\ISS Monitor\issmon.exe	catzx.exe
File opened for modification	C:\Program Files (x86)\ISS Monitor\issmon.exe	catzx.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
2192	schtasks.exe
4424	schtasks.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

pid	Process
1604	catzx.exe
1604	catzx.exe
1604	catzx.exe
1604	catzx.exe
1604	catzx.exe
1604	catzx.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1604	catzx.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	1604	catzx.exe

Suspicious use of WriteProcessMemory 14 IoCs

description	pid	Process	procid_target
PID 1996 wrote to memory of 1604	1996	catzx.exe	90
PID 1996 wrote to memory of 1604	1996	catzx.exe	90
PID 1996 wrote to memory of 1604	1996	catzx.exe	90
PID 1996 wrote to memory of 1604	1996	catzx.exe	90
PID 1996 wrote to memory of 1604	1996	catzx.exe	90
PID 1996 wrote to memory of 1604	1996	catzx.exe	90
PID 1996 wrote to memory of 1604	1996	catzx.exe	90
PID 1996 wrote to memory of 1604	1996	catzx.exe	90
PID 1604 wrote to memory of 2192	1604	catzx.exe	91
PID 1604 wrote to memory of 2192	1604	catzx.exe	91
PID 1604 wrote to memory of 2192	1604	catzx.exe	91
PID 1604 wrote to memory of 4424	1604	catzx.exe	93
PID 1604 wrote to memory of 4424	1604	catzx.exe	93
PID 1604 wrote to memory of 4424	1604	catzx.exe	93

C:\Users\Admin\AppData\Local\Temp\catzx.exe
"C:\Users\Admin\AppData\Local\Temp\catzx.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1996
- C:\Users\Admin\AppData\Local\Temp\catzx.exe
  "C:\Users\Admin\AppData\Local\Temp\catzx.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
  PID:1604
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "ISS Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1E2F.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:2192
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "ISS Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp1FF5.tmp"
    3⤵
    - Creates scheduled task(s)
    PID:4424

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Registry Run Keys / Startup Folder

Scheduled Task

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/1604-137-0x0000000000400000-0x0000000000438000-memory.dmp

Download

memory/1604-143-0x0000000006F80000-0x0000000006FE6000-memory.dmp

Download

memory/1604-140-0x0000000005260000-0x0000000005804000-memory.dmp

Download

memory/1604-139-0x00000000743E0000-0x0000000074B90000-memory.dmp

Download

memory/1996-133-0x00000000743E0000-0x0000000074B90000-memory.dmp

Download

memory/1996-136-0x0000000008930000-0x00000000089CC000-memory.dmp

Download

memory/1996-135-0x0000000004D10000-0x00000000052B4000-memory.dmp

Download

memory/1996-134-0x0000000004EA0000-0x0000000004EAA000-memory.dmp

Download

memory/1996-130-0x0000000000340000-0x000000000043E000-memory.dmp

Download

memory/1996-132-0x0000000004E00000-0x0000000004E92000-memory.dmp

Download

memory/1996-131-0x00000000052C0000-0x0000000005864000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads