nanocore | 83c1144ce8535e1a018e91b7fad42ec8730ac209e82e7814dbd7cf3416275bec

General

Target
8c1773839c7cc7f750d7ff6034436590N.exe
Size 1.2MB
Sample240731-jmm7cathlr
SHA256 83c1144ce8535e1a018e91b7fad42ec8730ac209e82e7814dbd7cf3416275bec
MD5 8c1773839c7cc7f750d7ff6034436590
SHA1 b83d258aedda7037e47f6cc5de87fb7e8542d4ff
SHA512 ff08350302883fe3ffce8b0ca838e1f7bd18979b1d16fb42bbef85852380ef95aed013642ee840bf9c5cef1d89f0e17e8027280bd5b2eb5f0756619dea0ef366
SSDEEP 24576:XAHnh+eWsN3skA4RV1Hom2KXMmHatoI3fr6j2/2+n/a5Y:Kh+ZkldoPK8YatoMYY
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore discovery evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

213.184.126.143:1993

Mutex

023e0719-23ff-48a0-a14a-16f92fea10e1

Attributes

activate_away_mode
true
backup_connection_host
213.184.126.143
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2019-01-21T14:43:07.916268436Z
bypass_user_account_control
false
bypass_user_account_control_data
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
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
1993
default_group
isreal
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
023e0719-23ff-48a0-a14a-16f92fea10e1
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
213.184.126.143
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

Drops startup file 1 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PasswordOnWakeSettingFlyout.url	8c1773839c7cc7f750d7ff6034436590N.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\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\UDP Host = "C:\\Program Files (x86)\\UDP Host\\udphost.exe"	RegAsm.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	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2600 set thread context of 2372	2600	8c1773839c7cc7f750d7ff6034436590N.exe	85

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\UDP Host\udphost.exe	RegAsm.exe
File opened for modification	C:\Program Files (x86)\UDP Host\udphost.exe	RegAsm.exe

System Location Discovery: System Language Discovery 1 TTPs 4 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	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	8c1773839c7cc7f750d7ff6034436590N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
5080	schtasks.exe
3944	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2372	RegAsm.exe
2372	RegAsm.exe
2372	RegAsm.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2372	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2372	RegAsm.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
2600	8c1773839c7cc7f750d7ff6034436590N.exe
2600	8c1773839c7cc7f750d7ff6034436590N.exe
2600	8c1773839c7cc7f750d7ff6034436590N.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
2600	8c1773839c7cc7f750d7ff6034436590N.exe
2600	8c1773839c7cc7f750d7ff6034436590N.exe
2600	8c1773839c7cc7f750d7ff6034436590N.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 2600 wrote to memory of 2372	2600	8c1773839c7cc7f750d7ff6034436590N.exe	85
PID 2600 wrote to memory of 2372	2600	8c1773839c7cc7f750d7ff6034436590N.exe	85
PID 2600 wrote to memory of 2372	2600	8c1773839c7cc7f750d7ff6034436590N.exe	85
PID 2600 wrote to memory of 2372	2600	8c1773839c7cc7f750d7ff6034436590N.exe	85
PID 2600 wrote to memory of 2372	2600	8c1773839c7cc7f750d7ff6034436590N.exe	85
PID 2372 wrote to memory of 5080	2372	RegAsm.exe	86
PID 2372 wrote to memory of 5080	2372	RegAsm.exe	86
PID 2372 wrote to memory of 5080	2372	RegAsm.exe	86
PID 2372 wrote to memory of 3944	2372	RegAsm.exe	88
PID 2372 wrote to memory of 3944	2372	RegAsm.exe	88
PID 2372 wrote to memory of 3944	2372	RegAsm.exe	88

C:\Users\Admin\AppData\Local\Temp\8c1773839c7cc7f750d7ff6034436590N.exe
"C:\Users\Admin\AppData\Local\Temp\8c1773839c7cc7f750d7ff6034436590N.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:2600
- C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
  "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
  2⤵
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Drops file in Program Files directory
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2372
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "UDP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmpAFB3.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:5080
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "UDP Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB003.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3944

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

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

tmpAFB3.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpAFB3.tmp
Size 1KB
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969
MD5 SHA1 SHA512

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tmpB003.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpB003.tmp
Size 1KB
SHA256 74d7ae25500c92c38e80fa39b154f6ae747978fecd83e15cb2c5f8152a73a1bc
MD5 d07b42c17d8d11c2a33a3b7875f718a4
SHA1 d38315afb4b55ddd9d47ac37ccad7db45863a470
SHA512 84214b11c56fc5a04856ed7fdccddeed3b493907f7489d93ed16b5c983f1e96df3ef62fa831b113ff352726ff259324ddeaa72805145f5e1e9056cdc28e06eaa
MD5 SHA1 SHA512

Submit Download

memory/2372-0-0x0000000000750000-0x0000000000788000-memory.dmp

Download

memory/2372-6-0x00000000739C2000-0x00000000739C3000-memory.dmp

Download

memory/2372-7-0x00000000739C0000-0x0000000073F71000-memory.dmp

Download

memory/2372-8-0x00000000739C0000-0x0000000073F71000-memory.dmp

Download

memory/2372-19-0x00000000739C2000-0x00000000739C3000-memory.dmp

Download

memory/2372-20-0x00000000739C0000-0x0000000073F71000-memory.dmp

Download

memory/2600-5-0x0000000000F90000-0x0000000000F91000-memory.dmp

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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