nanocore | 81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005

General

Target

81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
Size

1.1MB
MD5

9e764a4af39e8670ebbc57b40bd96ce0
SHA1

226b125cf5ef38cbc06814f4677f6e45de71f2f0
SHA256

81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005
SHA512

526e1276036c95dd81a76ccc12e9cd2a5bb940cb79c30e87983417b89e563eca4feca3ee674bb5fb41e3e38067b93828bc94871623c9e0b49617bbf30db58da6
SSDEEP

24576:1AHnh+eWsN3skA4RV1Hom2KXMmHahZB/Nep86f3YAm4W5y:kh+ZkldoPK8Yahb/NKKAm9y

Score

10^/10

nanocore discovery evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

160.202.163.242:6765

Mutex

c0a66e70-712e-4e13-85d0-5362a812b1a5

Attributes

activate_away_mode
true
backup_connection_host
160.202.163.242
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2019-02-24T16:03:16.653191036Z
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
6765
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
c0a66e70-712e-4e13-85d0-5362a812b1a5
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
160.202.163.242
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

Processes:

81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\VsGraphicsDesktopEngine.lnk	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

RegAsm.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\WAN Subsystem = "C:\\Program Files (x86)\\WAN Subsystem\\wanss.exe"	RegAsm.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

RegAsm.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	RegAsm.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe

description	pid	Process	procid_target
PID 1716 set thread context of 3724	1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe	91

Drops file in Program Files directory 2 IoCs

Processes:

RegAsm.exe

description	ioc	Process
File created	C:\Program Files (x86)\WAN Subsystem\wanss.exe	RegAsm.exe
File opened for modification	C:\Program Files (x86)\WAN Subsystem\wanss.exe	RegAsm.exe

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 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

Processes:

81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exeRegAsm.exeschtasks.exeschtasks.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	RegAsm.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.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

Processes:

schtasks.exeschtasks.exe

pid	Process
3376	schtasks.exe
4212	schtasks.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

RegAsm.exe81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe

pid	Process
3724	RegAsm.exe
3724	RegAsm.exe
3724	RegAsm.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

RegAsm.exe

pid	Process
3724	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

Processes:

RegAsm.exe

description	pid	Process
Token: SeDebugPrivilege	3724	RegAsm.exe

Suspicious use of FindShellTrayWindow 3 IoCs

Processes:

81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe

pid	Process
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe

Suspicious use of SendNotifyMessage 3 IoCs

Processes:

81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe

pid	Process
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe

Suspicious use of WriteProcessMemory 11 IoCs

Processes:

81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exeRegAsm.exe

description	pid	Process	procid_target
PID 1716 wrote to memory of 3724	1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe	91
PID 1716 wrote to memory of 3724	1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe	91
PID 1716 wrote to memory of 3724	1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe	91
PID 1716 wrote to memory of 3724	1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe	91
PID 1716 wrote to memory of 3724	1716	81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe	91
PID 3724 wrote to memory of 3376	3724	RegAsm.exe	92
PID 3724 wrote to memory of 3376	3724	RegAsm.exe	92
PID 3724 wrote to memory of 3376	3724	RegAsm.exe	92
PID 3724 wrote to memory of 4212	3724	RegAsm.exe	94
PID 3724 wrote to memory of 4212	3724	RegAsm.exe	94
PID 3724 wrote to memory of 4212	3724	RegAsm.exe	94

C:\Users\Admin\AppData\Local\Temp\81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe
"C:\Users\Admin\AppData\Local\Temp\81cfe44ada0789cd03f17951b4948f9df4b691b34a1c7d7e8f336cc346164005N.exe"
1⤵
- Drops startup file
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
PID:1716
- 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:3724
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "WAN Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp2D06.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:3376
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "WAN Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp2D65.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4212

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

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

C:\Users\Admin\AppData\Local\Temp\tmp2D06.tmp

Filesize
1KB

MD5
c6f0625bf4c1cdfb699980c9243d3b22

SHA1
43de1fe580576935516327f17b5da0c656c72851

SHA256
8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576

SHA512
9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp2D65.tmp

Filesize
1KB

MD5
02783aa0d9a1a2104300bdd910c9b6dc

SHA1
0c8409582f9e606183eca539cc493d82983a0fb0

SHA256
59a13383f0495d96e868a7f41557d17f5afe15ce5548d7cc6c7501f6095f68fb

SHA512
11ef8bceddd6c0dc0ecec3e5bfbabba4595368b8b9be01a38ccbeaa509b7f99960fea6bbd83a37ea9807f79a5db08cdba1ec8ac85443ffdc3c0f204760153854

Download Submit
memory/1716-3-0x0000000001060000-0x0000000001061000-memory.dmp

Filesize
4KB

Download
memory/3724-4-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/3724-9-0x0000000073682000-0x0000000073683000-memory.dmp

Filesize
4KB

Download
memory/3724-10-0x0000000073680000-0x0000000073C31000-memory.dmp

Filesize
5.7MB

Download
memory/3724-11-0x0000000073680000-0x0000000073C31000-memory.dmp

Filesize
5.7MB

Download
memory/3724-19-0x0000000073682000-0x0000000073683000-memory.dmp

Filesize
4KB

Download
memory/3724-20-0x0000000073680000-0x0000000073C31000-memory.dmp

Filesize
5.7MB

Download
memory/3724-21-0x0000000073680000-0x0000000073C31000-memory.dmp

Filesize
5.7MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads