nanocore | b4f200313ffedb2cf4a3e8dab1fababb3bf71f14512c2bbca77bb629002c4e9d

Analysis

max time kernel
125s
max time network
149s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
submitted
03-10-2024 07:42

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General

Target

New order#02102024.rtf
Size

575KB
MD5

225513828041aebf2506283efc3ba4ce
SHA1

3e64c97d1ae87a63c9af286dad9a8a716dcd9db4
SHA256

b4f200313ffedb2cf4a3e8dab1fababb3bf71f14512c2bbca77bb629002c4e9d
SHA512

2e81b7a1f0e0e296b09359c478df649927843a623ea16990d5c47e6fa5aef158ee6dd721dcb48b677dd5c5ea84431087e4cee1a970508b8525670aca2dbdb5a7
SSDEEP

6144:wwAYwAYwAgmBjEiBi2Mz09X5DBimC8gvJF9RN:f9

Score

10^/10

nanocore discovery evasion execution keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

pnauco5.ddns.net:1664

Mutex

cde38e58-d99c-4068-b775-59569bc2e8ce

Attributes

activate_away_mode
true
backup_connection_host
pnauco5.ddns.net
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2024-07-03T06:48:27.569053036Z
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
NEW
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
cde38e58-d99c-4068-b775-59569bc2e8ce
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
pnauco5.ddns.net
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

Blocklisted process makes network request 1 IoCs

Processes:

EQNEDT32.EXE

flow	pid	Process
3	2748	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

Processes:

powershell.exe

pid	Process
2824	powershell.exe

Downloads MZ/PE file

Executes dropped EXE 2 IoCs

Processes:

cataisken20309.execataisken20309.exe

pid	Process
2620	cataisken20309.exe
2936	cataisken20309.exe

Loads dropped DLL 1 IoCs

Processes:

EQNEDT32.EXE

pid	Process
2748	EQNEDT32.EXE

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

cataisken20309.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\IMAP Monitor = "C:\\Program Files (x86)\\IMAP Monitor\\imapmon.exe"	cataisken20309.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

T1082

Processes:

cataisken20309.exe

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	cataisken20309.exe

Drops file in System32 directory 1 IoCs

Processes:

powershell.exe

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

Processes:

cataisken20309.exe

description	pid	Process	procid_target
PID 2620 set thread context of 2936	2620	cataisken20309.exe	36

Drops file in Program Files directory 2 IoCs

Processes:

cataisken20309.exe

description	ioc	Process
File opened for modification	C:\Program Files (x86)\IMAP Monitor\imapmon.exe	cataisken20309.exe
File created	C:\Program Files (x86)\IMAP Monitor\imapmon.exe	cataisken20309.exe

Drops file in Windows directory 1 IoCs

Processes:

WINWORD.EXE

description	ioc	Process
File opened for modification	C:\Windows\Debug\WIA\wiatrace.log	WINWORD.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

Processes:

schtasks.exeWINWORD.EXEEQNEDT32.EXEcataisken20309.execataisken20309.exepowershell.exeschtasks.exe

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	WINWORD.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	EQNEDT32.EXE
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cataisken20309.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cataisken20309.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe

Office loads VBA resources, possible macro or embedded object present

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

Processes:

EQNEDT32.EXE

pid	Process
2748	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

Processes:

schtasks.exeschtasks.exe

pid	Process
1900	schtasks.exe
1932	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

WINWORD.EXE

pid	Process
2920	WINWORD.EXE

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

powershell.execataisken20309.exe

pid	Process
2824	powershell.exe
2936	cataisken20309.exe
2936	cataisken20309.exe
2936	cataisken20309.exe
2936	cataisken20309.exe
2936	cataisken20309.exe
2936	cataisken20309.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

Processes:

cataisken20309.exe

pid	Process
2936	cataisken20309.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.execataisken20309.exe

description	pid	Process
Token: SeDebugPrivilege	2824	powershell.exe
Token: SeDebugPrivilege	2936	cataisken20309.exe

Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

WINWORD.EXE

pid	Process
2920	WINWORD.EXE
2920	WINWORD.EXE

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

EQNEDT32.EXEWINWORD.EXEcataisken20309.execataisken20309.exe

description	pid	Process	procid_target
PID 2748 wrote to memory of 2620	2748	EQNEDT32.EXE	29
PID 2748 wrote to memory of 2620	2748	EQNEDT32.EXE	29
PID 2748 wrote to memory of 2620	2748	EQNEDT32.EXE	29
PID 2748 wrote to memory of 2620	2748	EQNEDT32.EXE	29
PID 2920 wrote to memory of 1196	2920	WINWORD.EXE	33
PID 2920 wrote to memory of 1196	2920	WINWORD.EXE	33
PID 2920 wrote to memory of 1196	2920	WINWORD.EXE	33
PID 2920 wrote to memory of 1196	2920	WINWORD.EXE	33
PID 2620 wrote to memory of 2824	2620	cataisken20309.exe	34
PID 2620 wrote to memory of 2824	2620	cataisken20309.exe	34
PID 2620 wrote to memory of 2824	2620	cataisken20309.exe	34
PID 2620 wrote to memory of 2824	2620	cataisken20309.exe	34
PID 2620 wrote to memory of 2936	2620	cataisken20309.exe	36
PID 2620 wrote to memory of 2936	2620	cataisken20309.exe	36
PID 2620 wrote to memory of 2936	2620	cataisken20309.exe	36
PID 2620 wrote to memory of 2936	2620	cataisken20309.exe	36
PID 2620 wrote to memory of 2936	2620	cataisken20309.exe	36
PID 2620 wrote to memory of 2936	2620	cataisken20309.exe	36
PID 2620 wrote to memory of 2936	2620	cataisken20309.exe	36
PID 2620 wrote to memory of 2936	2620	cataisken20309.exe	36
PID 2620 wrote to memory of 2936	2620	cataisken20309.exe	36
PID 2936 wrote to memory of 1900	2936	cataisken20309.exe	37
PID 2936 wrote to memory of 1900	2936	cataisken20309.exe	37
PID 2936 wrote to memory of 1900	2936	cataisken20309.exe	37
PID 2936 wrote to memory of 1900	2936	cataisken20309.exe	37
PID 2936 wrote to memory of 1932	2936	cataisken20309.exe	39
PID 2936 wrote to memory of 1932	2936	cataisken20309.exe	39
PID 2936 wrote to memory of 1932	2936	cataisken20309.exe	39
PID 2936 wrote to memory of 1932	2936	cataisken20309.exe	39

C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
"C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\New order#02102024.rtf"
1⤵
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2920
- C:\Windows\splwow64.exe
  C:\Windows\splwow64.exe 12288
  2⤵
  PID:1196

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:2748
- C:\Users\Admin\AppData\Roaming\cataisken20309.exe
  "C:\Users\Admin\AppData\Roaming\cataisken20309.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of SetThreadContext
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2620
- - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\cataisken20309.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:2824
- - C:\Users\Admin\AppData\Roaming\cataisken20309.exe
    "C:\Users\Admin\AppData\Roaming\cataisken20309.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:2936
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "IMAP Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmp9000.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1900
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "IMAP Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp905E.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1932

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Exploitation for Client Execution

T1203

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmp9000.tmp

Filesize
1KB

MD5
64183a5654918ff0e81c51660c729bf4

SHA1
9b7b487ce587095c32010dedc964ed9b58b349f5

SHA256
40ee035a8dd2f5be73bb540fd5afd40ebb717249362f3de003146ffed92cab1b

SHA512
ae45401e1c7eafa9e40eea11c569ab92faf3de386943af97533c8b725fbf8a36dd1c93b7d4e5cb7a6c04351cf9bd40add1f3f749b58978546b47b2beb4a0ae67

Download Submit
C:\Users\Admin\AppData\Local\Temp\tmp905E.tmp

Filesize
1KB

MD5
d2d6911d94b06e405e7687a2437eafec

SHA1
9f28f9e7d8d5179d44ddaa6ca266984ed7521dea

SHA256
2dc87169ad53fbdd7abb08f49777cb8fb05adbff4e6f6616b4c89942af8cad0f

SHA512
b5983de701ff98e944283a25f1770c1e792d52148dc1671f1d19203f8b9d10b056abcf79a17ca536a5f88ccf52f6445d8f3e75fce628666640ad8bad697dcfd1

Download Submit
\Users\Admin\AppData\Roaming\cataisken20309.exe

Filesize
792KB

MD5
f4404d9cd543608dd880c42076521864

SHA1
121f58afd508304776f107f2e6a054cfeed5fd40

SHA256
5fcd1f0174623a340f8c01d1cb4770b2c62b15f0a4036ce84df2120ed0556eb3

SHA512
397b04d2b1b3d5e73634ff9ad4ae843bb160f013975a87b0747125d2905512a52d8f0a22a7d588f1f5776815a3ea86f13364bae1952da695e78eb22e60846b7f

Download Submit
memory/2620-14-0x000000006BBDE000-0x000000006BBDF000-memory.dmp

Filesize
4KB

Download
memory/2620-16-0x0000000001160000-0x000000000122C000-memory.dmp

Filesize
816KB

Download
memory/2620-17-0x0000000000650000-0x000000000066E000-memory.dmp

Filesize
120KB

Download
memory/2620-24-0x000000006BBDE000-0x000000006BBDF000-memory.dmp

Filesize
4KB

Download
memory/2620-25-0x0000000000580000-0x00000000005FA000-memory.dmp

Filesize
488KB

Download
memory/2920-0-0x000000002F2D1000-0x000000002F2D2000-memory.dmp

Filesize
4KB

Download
memory/2920-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

Filesize
64KB

Download
memory/2920-2-0x0000000071A5D000-0x0000000071A68000-memory.dmp

Filesize
44KB

Download
memory/2920-22-0x0000000071A5D000-0x0000000071A68000-memory.dmp

Filesize
44KB

Download
memory/2936-28-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2936-54-0x00000000004F0000-0x0000000000502000-memory.dmp

Filesize
72KB

Download
memory/2936-32-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2936-30-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2936-35-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2936-26-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2936-37-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2936-39-0x0000000000400000-0x0000000000438000-memory.dmp

Filesize
224KB

Download
memory/2936-49-0x00000000003B0000-0x00000000003BA000-memory.dmp

Filesize
40KB

Download
memory/2936-50-0x00000000003C0000-0x00000000003DE000-memory.dmp

Filesize
120KB

Download
memory/2936-51-0x00000000003E0000-0x00000000003EA000-memory.dmp

Filesize
40KB

Download
memory/2936-34-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

Filesize
4KB

Download
memory/2936-55-0x0000000000690000-0x00000000006AA000-memory.dmp

Filesize
104KB

Download
memory/2936-56-0x00000000006B0000-0x00000000006BE000-memory.dmp

Filesize
56KB

Download
memory/2936-57-0x0000000000750000-0x0000000000762000-memory.dmp

Filesize
72KB

Download
memory/2936-58-0x0000000000CE0000-0x0000000000CEE000-memory.dmp

Filesize
56KB

Download
memory/2936-59-0x0000000000D30000-0x0000000000D44000-memory.dmp

Filesize
80KB

Download
memory/2936-60-0x0000000000D80000-0x0000000000D90000-memory.dmp

Filesize
64KB

Download
memory/2936-61-0x0000000000D90000-0x0000000000DA4000-memory.dmp

Filesize
80KB

Download
memory/2936-62-0x0000000000DA0000-0x0000000000DAE000-memory.dmp

Filesize
56KB

Download
memory/2936-63-0x0000000000F10000-0x0000000000F3E000-memory.dmp

Filesize
184KB

Download
memory/2936-64-0x0000000000DC0000-0x0000000000DD4000-memory.dmp

Filesize
80KB

Download