nanocore | 39355d4f0a52bdcfe7b1e58422da1ea60556e80ab090956fc80a5d00b3880b32

Analysis

max time kernel
147s
max time network
148s
platform
windows7_x64
resource
win7-20240221-en
resource tags

arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
submitted
14-05-2024 03:41

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General

Target

PO001704201900-xls.exe
Size

381KB
MD5

813a527a915620cffa5757eb6bccbb75
SHA1

ce17f93a8dedf7f00524e2552500904f54fbbaf1
SHA256

5896c651bc097a23e0e8eff8264991d4f8337a3dc528c0a123c9c3eb19c1c080
SHA512

adc9cf77b95643e047160df842b6533033c318e93361b5f4b80d887fcb2fe789007f7bf381dd82532bcfe310ac82e258af0a6a8c6f836944b3d3c9a8f2707b7a
SSDEEP

6144:8y7Vetai/7NkM6KArLBx88f5unHcsY60BzPCTC6J5:8yx2L8LNGIunHcsmdPMb

Score

10^/10

nanocore evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

bukis228.ddns.net:2888

Mutex

dd75f1a0-78c6-45b9-8931-1e71fe5f970c

Attributes

activate_away_mode
true
backup_connection_host
bukis228.ddns.net
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2019-01-27T07:09:50.233433736Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
2888
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
dd75f1a0-78c6-45b9-8931-1e71fe5f970c
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
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

T1547.001

Modify Registry

T1112

Processes:

RegAsm.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ISS Host = "C:\\Program Files (x86)\\ISS Host\\isshost.exe"	RegAsm.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs
evasion trojan

System Information Discovery
T1082

Processes:

RegAsm.exe

description ioc process

Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA RegAsm.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

PO001704201900-xls.exe

description pid process target process

PID 1952 set thread context of 2576 1952 PO001704201900-xls.exe RegAsm.exe

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

description	pid	process	target process
PID 1952 set thread context of 2576	1952	PO001704201900-xls.exe	RegAsm.exe

Drops file in Program Files directory 2 IoCs

Processes:

RegAsm.exe

description	ioc	process
File created	C:\Program Files (x86)\ISS Host\isshost.exe	RegAsm.exe
File opened for modification	C:\Program Files (x86)\ISS Host\isshost.exe	RegAsm.exe

Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

PO001704201900-xls.exeRegAsm.exe

pid process

1952 PO001704201900-xls.exe
1952 PO001704201900-xls.exe
1952 PO001704201900-xls.exe
1952 PO001704201900-xls.exe
2576 RegAsm.exe
2576 RegAsm.exe
Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

RegAsm.exe

pid process

2576 RegAsm.exe
Suspicious behavior: MapViewOfSection 1 IoCs

Processes:

PO001704201900-xls.exe

pid process

1952 PO001704201900-xls.exe
Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description pid process

Token: SeDebugPrivilege 2576 RegAsm.exe

pid	process
1952	PO001704201900-xls.exe
1952	PO001704201900-xls.exe
1952	PO001704201900-xls.exe
1952	PO001704201900-xls.exe
2576	RegAsm.exe
2576	RegAsm.exe

pid	process
2576	RegAsm.exe

pid	process
1952	PO001704201900-xls.exe

description	pid	process
Token: SeDebugPrivilege	2576	RegAsm.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

PO001704201900-xls.exe

description	pid	process	target process
PID 1952 wrote to memory of 2576	1952	PO001704201900-xls.exe	RegAsm.exe
PID 1952 wrote to memory of 2576	1952	PO001704201900-xls.exe	RegAsm.exe
PID 1952 wrote to memory of 2576	1952	PO001704201900-xls.exe	RegAsm.exe
PID 1952 wrote to memory of 2576	1952	PO001704201900-xls.exe	RegAsm.exe
PID 1952 wrote to memory of 2576	1952	PO001704201900-xls.exe	RegAsm.exe
PID 1952 wrote to memory of 2576	1952	PO001704201900-xls.exe	RegAsm.exe
PID 1952 wrote to memory of 2576	1952	PO001704201900-xls.exe	RegAsm.exe
PID 1952 wrote to memory of 2576	1952	PO001704201900-xls.exe	RegAsm.exe

C:\Users\Admin\AppData\Local\Temp\PO001704201900-xls.exe
"C:\Users\Admin\AppData\Local\Temp\PO001704201900-xls.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:1952

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
"C:\Users\Admin\AppData\Local\Temp\PO001704201900-xls.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
PID:2576

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/1952-0-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-1-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-2-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-3-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-4-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-6-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-7-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-8-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-9-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-10-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-11-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-12-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-13-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-14-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-15-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-16-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-17-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-18-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-19-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-20-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-21-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-22-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-23-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-24-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-25-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-26-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-27-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-28-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-29-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-30-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-31-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-32-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-33-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-34-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-35-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-36-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-37-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-38-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-39-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-40-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-41-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-42-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

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memory/1952-43-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/1952-5-0x0000000000230000-0x0000000000231000-memory.dmp

Filesize
4KB

Download
memory/2576-44-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2576-46-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2576-45-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download