nanocore | 93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d

Analysis

max time kernel
140s
max time network
143s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
13/08/2024, 22:31

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General

Target
93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe
Size 1.2MB
Sample240813-2fs35avapr
SHA256 93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d
MD5 7ed6d273bf014851e0ea83f298b15f6e
SHA1 b843e719a8e4985d26257850363ce02d130b312d
SHA512 d7ae99f196eab169fcebae96a6cd68978e879d337dd1be95b242b753f6d8a8c3e28fa5b20a90c38fab8f8f24cfe3fe605d8289f827b5836fd783d3e5a3918fc3
SSDEEP 24576:XAHnh+eWsN3skA4RV1Hom2KXMmHatoI3fr6j2/2+n/a5B:Kh+ZkldoPK8YatoMYB
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

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	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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\DNS Monitor = "C:\\Program Files (x86)\\DNS Monitor\\dnsmon.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 3904 set thread context of 4832	3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe	100

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\DNS Monitor\dnsmon.exe	RegAsm.exe
File opened for modification	C:\Program Files (x86)\DNS Monitor\dnsmon.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	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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

pid	Process
760	schtasks.exe
4924	schtasks.exe

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
4832	RegAsm.exe
4832	RegAsm.exe
4832	RegAsm.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4832	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4832	RegAsm.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe
3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe
3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe
3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe
3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 3904 wrote to memory of 4832	3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe	100
PID 3904 wrote to memory of 4832	3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe	100
PID 3904 wrote to memory of 4832	3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe	100
PID 3904 wrote to memory of 4832	3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe	100
PID 3904 wrote to memory of 4832	3904	93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe	100
PID 4832 wrote to memory of 760	4832	RegAsm.exe	101
PID 4832 wrote to memory of 760	4832	RegAsm.exe	101
PID 4832 wrote to memory of 760	4832	RegAsm.exe	101
PID 4832 wrote to memory of 4924	4832	RegAsm.exe	103
PID 4832 wrote to memory of 4924	4832	RegAsm.exe	103
PID 4832 wrote to memory of 4924	4832	RegAsm.exe	103

C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe
"C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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:3904
- 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:4832
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "DNS Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmpE579.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:760
- - C:\Windows\SysWOW64\schtasks.exe
    "schtasks.exe" /create /f /tn "DNS Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpE5D8.tmp"
    3⤵
    - System Location Discovery: System Language Discovery
    - Scheduled Task/Job: Scheduled Task
    PID:4924

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

tmpE579.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpE579.tmp
Size 1KB
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969
MD5 SHA1 SHA512

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tmpE5D8.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpE5D8.tmp
Size 1KB
SHA256 4d6ea014d135bdc4a5fd4281ce705672561b0279deab4302e06cbfe95e1080a6
MD5 7620b805f7bc12c79e126656c858d0e0
SHA1 89f09b8b4ef1fc421ddf5ed0cbbe012fab7fd666
SHA512 b02ac735c98b20020251a23ffa1b0308ad3a1c99593a15a8020d742472b0d5c36caa31c6ca2372e88cfd3b6792206ea7920162c2a33c83da24f0098c0513f562
MD5 SHA1 SHA512

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memory/3904-5-0x0000000001730000-0x0000000001731000-memory.dmp

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memory/4832-1-0x0000000000400000-0x0000000000438000-memory.dmp

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memory/4832-6-0x0000000073A12000-0x0000000073A13000-memory.dmp

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memory/4832-7-0x0000000073A10000-0x0000000073FC1000-memory.dmp

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memory/4832-8-0x0000000073A10000-0x0000000073FC1000-memory.dmp

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memory/4832-19-0x0000000073A10000-0x0000000073FC1000-memory.dmp

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memory/4832-20-0x0000000073A12000-0x0000000073A13000-memory.dmp

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memory/4832-21-0x0000000073A10000-0x0000000073FC1000-memory.dmp

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