nanocore | d54bdc32e63a1159d8775046e4ac77bd96a6745c29049effea5303a37e2d865a

General

Target

malware.xlsx
Size

2.2MB
MD5

af4a015e14731aca9d5d89d18b6145a5
SHA1

d43b9773c95cf3c7b0db3bf7d7571ea57db88898
SHA256

d54bdc32e63a1159d8775046e4ac77bd96a6745c29049effea5303a37e2d865a
SHA512

9629b2bffe3761bb7a9c5a31dc229f46f42a111825eb1c17a880228ae76a9ebd708e9c274661211dc82c436cf0de8ff0b6f1da45960e9f21c29a8e70ce24c774
SSDEEP

49152:Jp1keRzwrg87vtJer92x2zUkW2AhynUOAgLhouLDDeccF51Q:Jsm387XdkSPkNfJ

Score

10^/10

nanocore discovery evasion execution keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

C2

66.63.187.113:1664

Mutex

a376f716-2f77-4943-a431-3a3bcb53b7c0

Attributes

activate_away_mode
true
backup_connection_host
66.63.187.113
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2024-08-05T03:49:33.827385136Z
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
1664
default_group
CAT
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
a376f716-2f77-4943-a431-3a3bcb53b7c0
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
66.63.187.113
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
Nanocore family
nanocore

Blocklisted process makes network request 1 IoCs

flow	pid	Process
3	2780	EQNEDT32.EXE

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
1568	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

pid	Process
2548	terwhscat.exe
2804	terwhscat.exe

Loads dropped DLL 1 IoCs

pid	Process
2780	EQNEDT32.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 Service = "C:\\Program Files (x86)\\UDP Service\\udpsv.exe"	terwhscat.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	terwhscat.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2548 set thread context of 2804	2548	terwhscat.exe	34

Drops file in Program Files directory 2 IoCs

description	ioc	Process
File created	C:\Program Files (x86)\UDP Service\udpsv.exe	terwhscat.exe
File opened for modification	C:\Program Files (x86)\UDP Service\udpsv.exe	terwhscat.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 7 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	EXCEL.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	terwhscat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	terwhscat.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Enumerates system info in registry 2 TTPs 1 IoCs

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\FloatingPointProcessor	EXCEL.EXE

Launches Equation Editor 1 TTPs 1 IoCs

Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

exploit

Exploitation for Client Execution

T1203

pid	Process
2780	EQNEDT32.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
1544	schtasks.exe
1828	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2820	EXCEL.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

pid	Process
1568	powershell.exe
2804	terwhscat.exe
2804	terwhscat.exe
2804	terwhscat.exe
2804	terwhscat.exe
2804	terwhscat.exe
2804	terwhscat.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2804	terwhscat.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1568	powershell.exe
Token: SeDebugPrivilege	2804	terwhscat.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
2820	EXCEL.EXE
2820	EXCEL.EXE
2820	EXCEL.EXE

Suspicious use of WriteProcessMemory 25 IoCs

description	pid	Process	procid_target
PID 2780 wrote to memory of 2548	2780	EQNEDT32.EXE	31
PID 2780 wrote to memory of 2548	2780	EQNEDT32.EXE	31
PID 2780 wrote to memory of 2548	2780	EQNEDT32.EXE	31
PID 2780 wrote to memory of 2548	2780	EQNEDT32.EXE	31
PID 2548 wrote to memory of 1568	2548	terwhscat.exe	32
PID 2548 wrote to memory of 1568	2548	terwhscat.exe	32
PID 2548 wrote to memory of 1568	2548	terwhscat.exe	32
PID 2548 wrote to memory of 1568	2548	terwhscat.exe	32
PID 2548 wrote to memory of 2804	2548	terwhscat.exe	34
PID 2548 wrote to memory of 2804	2548	terwhscat.exe	34
PID 2548 wrote to memory of 2804	2548	terwhscat.exe	34
PID 2548 wrote to memory of 2804	2548	terwhscat.exe	34
PID 2548 wrote to memory of 2804	2548	terwhscat.exe	34
PID 2548 wrote to memory of 2804	2548	terwhscat.exe	34
PID 2548 wrote to memory of 2804	2548	terwhscat.exe	34
PID 2548 wrote to memory of 2804	2548	terwhscat.exe	34
PID 2548 wrote to memory of 2804	2548	terwhscat.exe	34
PID 2804 wrote to memory of 1828	2804	terwhscat.exe	35
PID 2804 wrote to memory of 1828	2804	terwhscat.exe	35
PID 2804 wrote to memory of 1828	2804	terwhscat.exe	35
PID 2804 wrote to memory of 1828	2804	terwhscat.exe	35
PID 2804 wrote to memory of 1544	2804	terwhscat.exe	37
PID 2804 wrote to memory of 1544	2804	terwhscat.exe	37
PID 2804 wrote to memory of 1544	2804	terwhscat.exe	37
PID 2804 wrote to memory of 1544	2804	terwhscat.exe	37

C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\malware.xlsx
1⤵
- System Location Discovery: System Language Discovery
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:2820

C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
"C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
1⤵
- Blocklisted process makes network request
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Launches Equation Editor
- Suspicious use of WriteProcessMemory
PID:2780
- C:\Users\Admin\AppData\Roaming\terwhscat.exe
  "C:\Users\Admin\AppData\Roaming\terwhscat.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2548
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\terwhscat.exe"
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1568
- - C:\Users\Admin\AppData\Roaming\terwhscat.exe
    "C:\Users\Admin\AppData\Roaming\terwhscat.exe"
    3⤵
    - Executes dropped EXE
    - 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:2804
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "UDP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB3C5.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1828
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "UDP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB443.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1544

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Exploitation for Client Execution

1

T1203

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

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

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmpB3C5.tmp

Filesize
1KB

MD5
325b972a0fdd4dea1ce8ff6f91708b99

SHA1
d48523c9f34add6a971a834f4fe26eabd2f5ce96

SHA256
f0ad5f6b7b9d99cbb86903e6161f20b16356645fc1ce48d607e65830756fb622

SHA512
4120e5668c8e51563833934b5ace64d820627d67b16c3e25a8f66ec0bf56165cbe3b85389122acb7c0948ecc123fec920641602c823b05a865270ef54b332172

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmpB443.tmp

Filesize
1KB

MD5
0a24db62cb5b84309c4803346caaa25d

SHA1
67660778f61bb44168c33ed3fe56ed86cf9583e8

SHA256
38d38647af394a04ee6add9f05c43244f04e64a6b96257f4b241a5038efa82df

SHA512
d25d9df063f44595d5e0bf890755bd387655131ff369eeedf3d11ffcc6202ca4455bbb33a8a926dd06839cbd1ddec3d06809b3c66a82c6518aa14beaa469a548

Download Submit
\Users\Admin\AppData\Roaming\terwhscat.exe

Filesize
726KB

MD5
23253284300f223fa0e82b92d4c648ac

SHA1
25bde72c0e00570a12c5c607b54c5e6368ab0897

SHA256
bab8b627c51547d2fd6a9902612fceb62a0f3868583e26b5e06e568e4a375a9f

SHA512
098b072b1f3aa4f5d60323677280f1d8f2bd723e30d79c7369a2b6b29dec9bb1d40aeede65228ab3e33451ab68ae61ff94391da144a25608b2ebd9c0800dfd0c

Download Submit
memory/2548-14-0x00000000007D0000-0x000000000084A000-memory.dmp

Filesize
488KB

Download
memory/2548-11-0x0000000000870000-0x000000000092C000-memory.dmp

Filesize
752KB

Download
memory/2548-12-0x0000000000770000-0x000000000078C000-memory.dmp

Filesize
112KB

Download
memory/2804-26-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2804-39-0x0000000000C70000-0x0000000000C7A000-memory.dmp

Filesize
40KB

Download
memory/2804-53-0x0000000005400000-0x0000000005414000-memory.dmp

Filesize
80KB

Download
memory/2804-24-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2804-23-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2804-21-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2804-19-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2804-17-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2804-15-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2804-52-0x00000000053D0000-0x00000000053FE000-memory.dmp

Filesize
184KB

Download
memory/2804-51-0x0000000005230000-0x000000000523E000-memory.dmp

Filesize
56KB

Download
memory/2804-37-0x0000000000A70000-0x0000000000A7A000-memory.dmp

Filesize
40KB

Download
memory/2804-38-0x0000000000A80000-0x0000000000A9E000-memory.dmp

Filesize
120KB

Download
memory/2804-27-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2804-42-0x0000000000CA0000-0x0000000000CB2000-memory.dmp

Filesize
72KB

Download
memory/2804-43-0x00000000023A0000-0x00000000023BA000-memory.dmp

Filesize
104KB

Download
memory/2804-44-0x00000000023C0000-0x00000000023CE000-memory.dmp

Filesize
56KB

Download
memory/2804-47-0x0000000004790000-0x000000000479E000-memory.dmp

Filesize
56KB

Download
memory/2804-48-0x00000000047A0000-0x00000000047B4000-memory.dmp

Filesize
80KB

Download
memory/2804-46-0x0000000004740000-0x000000000474C000-memory.dmp

Filesize
48KB

Download
memory/2804-45-0x00000000023D0000-0x00000000023E2000-memory.dmp

Filesize
72KB

Download
memory/2804-49-0x00000000047B0000-0x00000000047C0000-memory.dmp

Filesize
64KB

Download
memory/2804-50-0x0000000004900000-0x0000000004914000-memory.dmp

Filesize
80KB

Download
memory/2820-1-0x0000000071DBD000-0x0000000071DC8000-memory.dmp

Filesize
44KB

Download
memory/2820-13-0x0000000071DBD000-0x0000000071DC8000-memory.dmp

Filesize
44KB

Download
memory/2820-0-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads