nanocore | 6d233149cf42f476907c45a4e63329d00af0c78d9dafe6f9cc5a38784206db02

General

Target

fiddler.exe
Size

281KB
MD5

71776eeac76ac1591144338385374c5d
SHA1

2273f36d078d132c44a16a1564e9d9ff01334d51
SHA256

6d233149cf42f476907c45a4e63329d00af0c78d9dafe6f9cc5a38784206db02
SHA512

b3360011ff93b2ce892979848ad8a362c068ca28519668311e7312bfeccc4e4798751f0abd1cd531c42bbc79e2e42a108d26908b2e39f2c6783b011e3db93611
SSDEEP

6144:boy5p178U0MURaGyNXYWQzHazRfXrwSRnWwhrQ66fKkf/:boSeGUA5YZazpXUmZhZ6S2

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

Executes dropped EXE 2 IoCs

pid	Process
560	a1punf5t2of.exe
2664	a1punf5t2of.exe

Loads dropped DLL 2 IoCs

pid	Process
2536	fiddler.exe
560	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-1-5-21-1385883288-3042840365-2734249351-1000\Software\Microsoft\Windows\CurrentVersion\Run\b1b2dqljdx3 = "C:\\Users\\Admin\\AppData\\Roaming\\b1b2dqljdx3\\a1punf5t2of.exe"	fiddler.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 560 set thread context of 2664	560	a1punf5t2of.exe	32

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	fiddler.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
2664	a1punf5t2of.exe
2664	a1punf5t2of.exe
2664	a1punf5t2of.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2664	a1punf5t2of.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2664	a1punf5t2of.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 560	2536	fiddler.exe	31
PID 2536 wrote to memory of 560	2536	fiddler.exe	31
PID 2536 wrote to memory of 560	2536	fiddler.exe	31
PID 2536 wrote to memory of 560	2536	fiddler.exe	31
PID 2536 wrote to memory of 560	2536	fiddler.exe	31
PID 2536 wrote to memory of 560	2536	fiddler.exe	31
PID 2536 wrote to memory of 560	2536	fiddler.exe	31
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32
PID 560 wrote to memory of 2664	560	a1punf5t2of.exe	32

C:\Users\Admin\AppData\Local\Temp\fiddler.exe
"C:\Users\Admin\AppData\Local\Temp\fiddler.exe"
1⤵
- Loads dropped DLL
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:2536
- C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe
  "C:\Users\Admin\AppData\Roaming\b1b2dqljdx3\a1punf5t2of.exe"
  2⤵
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:560
- - 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:2664

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

System Information Discovery

2

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

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

Filesize
281KB

MD5
de9e4b4fb7c5069da9f24b034be18590

SHA1
c9efcb3ff8c47692156e1acc60a7167c0711374d

SHA256
6aa4f6a5f704e352878a2f2003029c974470820569fb0c1d4b7b39ff289f9200

SHA512
21545826d76283c3779d6268a6f1568c13de82570a24ac2b5db078320cf5ea2e8f7a432ca270a82f64874f1f935ee1e912d4ef1b754d877315df5a82e9d1b925

Download Submit
memory/560-19-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/560-17-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/560-18-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/560-21-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/560-16-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/560-43-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/560-20-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/560-15-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/2536-13-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/2536-2-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/2536-3-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/2536-1-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/2536-5-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/2536-4-0x0000000074980000-0x0000000074F2B000-memory.dmp

Filesize
5.7MB

Download
memory/2536-0-0x0000000074981000-0x0000000074982000-memory.dmp

Filesize
4KB

Download
memory/2664-39-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2664-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2664-33-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2664-30-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2664-27-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2664-25-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2664-23-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2664-41-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads