nanocore | a2b254edbd45a2fed0f9fce22f99bcb961de9723f121429146be803c9c2fd112

General

Target

a20ba1379d1cfabc6f97aa19cdf402c0N.exe
Size

282KB
MD5

a20ba1379d1cfabc6f97aa19cdf402c0
SHA1

274263c44bf043626fd09e6dc9fc606894a869ae
SHA256

a2b254edbd45a2fed0f9fce22f99bcb961de9723f121429146be803c9c2fd112
SHA512

74d60e6caf8a0c2cd46bac0bea69b02075da6e01eae1795ec9f735198edcf3892dc228beae6ab693aae27a1b3e9225988495354c57ee25aa3d256bd8193b017b
SSDEEP

6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkfi:boSeGUA5YZazpXUmZhZ6Sz

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

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-1-5-21-523280732-2327480845-3730041215-1000\Control Panel\International\Geo\Nation	a20ba1379d1cfabc6f97aa19cdf402c0N.exe

Executes dropped EXE 2 IoCs

pid	Process
2992	a1punf5t2of.exe
4300	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-1-5-21-523280732-2327480845-3730041215-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\b1b2dqljdx3 = "C:\\Users\\Admin\\AppData\\Roaming\\b1b2dqljdx3\\a1punf5t2of.exe"	a20ba1379d1cfabc6f97aa19cdf402c0N.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 2992 set thread context of 4300	2992	a1punf5t2of.exe	95

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	a20ba1379d1cfabc6f97aa19cdf402c0N.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
4300	a1punf5t2of.exe
4300	a1punf5t2of.exe
4300	a1punf5t2of.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4300	a1punf5t2of.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4300	a1punf5t2of.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1952 wrote to memory of 2992	1952	a20ba1379d1cfabc6f97aa19cdf402c0N.exe	94
PID 1952 wrote to memory of 2992	1952	a20ba1379d1cfabc6f97aa19cdf402c0N.exe	94
PID 1952 wrote to memory of 2992	1952	a20ba1379d1cfabc6f97aa19cdf402c0N.exe	94
PID 2992 wrote to memory of 4300	2992	a1punf5t2of.exe	95
PID 2992 wrote to memory of 4300	2992	a1punf5t2of.exe	95
PID 2992 wrote to memory of 4300	2992	a1punf5t2of.exe	95
PID 2992 wrote to memory of 4300	2992	a1punf5t2of.exe	95
PID 2992 wrote to memory of 4300	2992	a1punf5t2of.exe	95
PID 2992 wrote to memory of 4300	2992	a1punf5t2of.exe	95
PID 2992 wrote to memory of 4300	2992	a1punf5t2of.exe	95
PID 2992 wrote to memory of 4300	2992	a1punf5t2of.exe	95

C:\Users\Admin\AppData\Local\Temp\a20ba1379d1cfabc6f97aa19cdf402c0N.exe
"C:\Users\Admin\AppData\Local\Temp\a20ba1379d1cfabc6f97aa19cdf402c0N.exe"
1⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1952
- 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:2992
- - 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:4300

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
283KB

MD5
c63775248aff70cf4ebae75ab024c796

SHA1
ff37f2ec81d6c21d04e2bdbd6af40a19734da6e2

SHA256
33363aedb69feacf38990d548a59afd59348fca56643dde7100d0fc35ff5cee5

SHA512
0185f6d82719d91f4e44d8443c403ca71b9c112397bf8a978a1e31b0577d4635904fa177a91db61d105cc83b065faedeedb0224b74a85d0b0a47d9d65d03c658

Download Submit
memory/1952-21-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/1952-1-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/1952-0-0x0000000074952000-0x0000000074953000-memory.dmp

Filesize
4KB

Download
memory/1952-4-0x0000000074952000-0x0000000074953000-memory.dmp

Filesize
4KB

Download
memory/1952-5-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/1952-6-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/1952-7-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/1952-2-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/1952-3-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/2992-25-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/2992-22-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/2992-38-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/2992-23-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/2992-26-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/2992-27-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/2992-24-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/4300-39-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/4300-28-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4300-33-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/4300-35-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/4300-36-0x0000000074950000-0x0000000074F01000-memory.dmp

Filesize
5.7MB

Download
memory/4300-30-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/4300-29-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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