nanocore | b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1b

General

Target

b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1bN.exe
Size

256KB
MD5

a260686fa8cb39e3100ffddb086c2ee0
SHA1

5237ea9f3bbc71b52de72816c01332b1d3d48e0c
SHA256

b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1b
SHA512

789cb135dc2877e438803ed4102f52b257e9274fabaacd00ca5d4fe074cfadb5abe60bb1a85e5b0b4473d2ea5204be0ba46dca077a70545d93b410d102666153
SSDEEP

6144:85p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ4l:EeGUA5YZazpXUmZhPl

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-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1bN.exe

Executes dropped EXE 2 IoCs

pid	Process
2672	a1punf5t2of.exe
4528	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-1-5-21-493223053-2004649691-1575712786-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\b1b2dqljdx3 = "C:\\Users\\Admin\\AppData\\Roaming\\b1b2dqljdx3\\a1punf5t2of.exe"	b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1bN.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 2672 set thread context of 4528	2672	a1punf5t2of.exe	97

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	a1punf5t2of.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	a1punf5t2of.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1bN.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4528	a1punf5t2of.exe
4528	a1punf5t2of.exe
4528	a1punf5t2of.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4528	a1punf5t2of.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4528	a1punf5t2of.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4412 wrote to memory of 2672	4412	b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1bN.exe	96
PID 4412 wrote to memory of 2672	4412	b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1bN.exe	96
PID 4412 wrote to memory of 2672	4412	b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1bN.exe	96
PID 2672 wrote to memory of 4528	2672	a1punf5t2of.exe	97
PID 2672 wrote to memory of 4528	2672	a1punf5t2of.exe	97
PID 2672 wrote to memory of 4528	2672	a1punf5t2of.exe	97
PID 2672 wrote to memory of 4528	2672	a1punf5t2of.exe	97
PID 2672 wrote to memory of 4528	2672	a1punf5t2of.exe	97
PID 2672 wrote to memory of 4528	2672	a1punf5t2of.exe	97
PID 2672 wrote to memory of 4528	2672	a1punf5t2of.exe	97
PID 2672 wrote to memory of 4528	2672	a1punf5t2of.exe	97

C:\Users\Admin\AppData\Local\Temp\b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1bN.exe
"C:\Users\Admin\AppData\Local\Temp\b4a1471bd00c97659be8d2c5a52605ff27b398043e0cb779394e4bec5b8c5b1bN.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:4412
- 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:2672
- - 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:4528

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
256KB

MD5
86de01652a769bfce44a610ec942ceae

SHA1
64dc0416faeeb14c04a228a2744538c5e93dd048

SHA256
58390af7ab37f9acbd0df9ee4696f6ec0b5587c817c611ae6e99620208e54882

SHA512
d283ceea172702127bbc22135e495f8ffa6abaa140f8d05f42631a598cc304b1dbf670f2929c01209f2102e0fb7ce02c1d4158e8b20148a7432dc56cad87c772

Download Submit
memory/2672-40-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/2672-27-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/2672-26-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/2672-25-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/2672-24-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/2672-23-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/2672-22-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4412-6-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4412-21-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4412-7-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4412-0-0x0000000074922000-0x0000000074923000-memory.dmp

Filesize
4KB

Download
memory/4412-5-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4412-4-0x0000000074922000-0x0000000074923000-memory.dmp

Filesize
4KB

Download
memory/4412-3-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4412-2-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4412-1-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4528-30-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4528-29-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4528-33-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4528-35-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4528-34-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4528-37-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4528-38-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download
memory/4528-28-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4528-41-0x0000000074920000-0x0000000074ED1000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads