nanocore | 4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6

General

Target

4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6.exe
Size

279KB
MD5

55972f7d15273da7566f4f2b1a64200d
SHA1

3747c59123adf4f9cb1225fb2180a77166b13437
SHA256

4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6
SHA512

3b3bd465d8a98205a788ec298a5a3d1c0bb3665b10200534d2e2490ac5a9d0709b0a574cc7afea4a04cbdac111f92f18f68cc0bac42381a251652acd90ced25d
SSDEEP

6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fQ:boSeGUA5YZazpXUmZhZ6o

Score

10^/10

nanocore discovery evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

sysupdate24.ddns.net:45400

Mutex

ae82ab7f-db07-49ee-9d2b-76075d76f37f

Attributes

activate_away_mode
true
backup_connection_host
backup_dns_server
buffer_size
65535
build_time
2020-04-24T17:41:53.492468936Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
45400
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
ae82ab7f-db07-49ee-9d2b-76075d76f37f
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
sysupdate24.ddns.net
primary_dns_server
request_elevation
true
restart_delay
5000
run_delay
0
run_on_startup
true
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
Nanocore family
nanocore

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\Control Panel\International\Geo\Nation	4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6.exe

Executes dropped EXE 2 IoCs

pid	Process
2564	a1punf5t2of.exe
3460	a1punf5t2of.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\USER\S-1-5-21-1045960512-3948844814-3059691613-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\b1b2dqljdx3 = "C:\\Users\\Admin\\AppData\\Roaming\\b1b2dqljdx3\\a1punf5t2of.exe"	4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6.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	a1punf5t2of.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2564 set thread context of 3460	2564	a1punf5t2of.exe	98

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 3 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	4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1punf5t2of.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1punf5t2of.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
3460	a1punf5t2of.exe
3460	a1punf5t2of.exe
3460	a1punf5t2of.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
3460	a1punf5t2of.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3460	a1punf5t2of.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 2564	2752	4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6.exe	97
PID 2752 wrote to memory of 2564	2752	4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6.exe	97
PID 2752 wrote to memory of 2564	2752	4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6.exe	97
PID 2564 wrote to memory of 3460	2564	a1punf5t2of.exe	98
PID 2564 wrote to memory of 3460	2564	a1punf5t2of.exe	98
PID 2564 wrote to memory of 3460	2564	a1punf5t2of.exe	98
PID 2564 wrote to memory of 3460	2564	a1punf5t2of.exe	98
PID 2564 wrote to memory of 3460	2564	a1punf5t2of.exe	98
PID 2564 wrote to memory of 3460	2564	a1punf5t2of.exe	98
PID 2564 wrote to memory of 3460	2564	a1punf5t2of.exe	98
PID 2564 wrote to memory of 3460	2564	a1punf5t2of.exe	98

C:\Users\Admin\AppData\Local\Temp\4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6.exe
"C:\Users\Admin\AppData\Local\Temp\4ff402a5d41e20740c3bca70bd0cdefa0a02e3e2c59772df79d6c773ab6cd2d6.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
  "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2564
- - C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
    "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
    3⤵
    - Executes dropped EXE
    - Checks whether UAC is enabled
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious behavior: GetForegroundWindowSpam
    - Suspicious use of AdjustPrivilegeToken
    PID:3460

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

3

T1082

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe

Filesize
279KB

MD5
4cc5c1a3a66749e6708f852397e2059f

SHA1
18a5b494514c7888cde50e9b78a3305676c84d0f

SHA256
88194132a44b714aa6c464240ff36d61632d04c337fc914ac9955e5e55897e4a

SHA512
ea4a14757786b4f9b5e606213bb24832f358d62bfd2306dcfea91e9040e3455231da1bb2ca4c39e6aa392ffb30786791d0c88bfd03973385b24dc88229a15253

Download Submit
memory/2564-39-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2564-26-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2564-25-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2564-24-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2564-23-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2564-21-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2752-6-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2752-7-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2752-0-0x0000000074C92000-0x0000000074C93000-memory.dmp

Filesize
4KB

Download
memory/2752-5-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2752-22-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2752-4-0x0000000074C92000-0x0000000074C93000-memory.dmp

Filesize
4KB

Download
memory/2752-3-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2752-2-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/2752-1-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/3460-28-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3460-30-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3460-32-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/3460-33-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/3460-34-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/3460-36-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/3460-37-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download
memory/3460-27-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3460-40-0x0000000074C90000-0x0000000075241000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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