nanocore | b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4

Analysis

max time kernel
147s
max time network
152s
platform
windows10_x64
resource
win10
submitted
29/07/2020, 07:12

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General

Target
b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4.exe
Size 3.9MB
Sample200729-6pb74tfjsa
SHA256 b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4
MD5 91027dd7468e8836631a8793d73164fd
SHA1 02482738aebf223e424f34dfe9eefc55671caf65
SHA512 4e6657921dad88c4f51e70809ccc6d661c7c545084f8a09591625a783fb6859c1b9db820f958cb62b2e1a333d43e326d8922fd6103bea19c7645058156e07f8a
MD5 SHA1 SHA512

Score

10^/10

persistence evasion trojan keylogger stealer spyware nanocore

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

KUTAS54645-53485.portmap.host:37458

Mutex

c7acd0a5-aac9-4a2e-8efa-4df3b342a8d7

Attributes

activate_away_mode
true
backup_connection_host
127.0.0.1
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2020-05-09T05:47:35.262147836Z
bypass_user_account_control
true
bypass_user_account_control_data
clear_access_control
true
clear_zone_identifier
false
connect_delay
4000
connection_port
37458
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
c7acd0a5-aac9-4a2e-8efa-4df3b342a8d7
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
KUTAS54645-53485.portmap.host
primary_dns_server
8.8.8.8
request_elevation
false
restart_delay
5000
run_delay
0
run_on_startup
true
set_critical_process
true
timeout_interval
5000
use_custom_dns_server
false
version
1.2.2.0
wan_timeout
8000

Signatures

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 3828 wrote to memory of 3832	3828	b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4.exe	67
PID 3828 wrote to memory of 3832	3828	b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4.exe	67
PID 3828 wrote to memory of 3832	3828	b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4.exe	67
PID 3832 wrote to memory of 3612	3832	CDS.exe	68
PID 3832 wrote to memory of 3612	3832	CDS.exe	68
PID 3832 wrote to memory of 3612	3832	CDS.exe	68
PID 3612 wrote to memory of 752	3612	crypted.exe	70
PID 3612 wrote to memory of 752	3612	crypted.exe	70
PID 3612 wrote to memory of 752	3612	crypted.exe	70
PID 3612 wrote to memory of 752	3612	crypted.exe	70
PID 3612 wrote to memory of 752	3612	crypted.exe	70
PID 3612 wrote to memory of 752	3612	crypted.exe	70
PID 3612 wrote to memory of 752	3612	crypted.exe	70
PID 3612 wrote to memory of 752	3612	crypted.exe	70
PID 3612 wrote to memory of 556	3612	crypted.exe	71
PID 3612 wrote to memory of 556	3612	crypted.exe	71
PID 3612 wrote to memory of 556	3612	crypted.exe	71
PID 556 wrote to memory of 368	556	WindowsDefenderUpdater.exe	72
PID 556 wrote to memory of 368	556	WindowsDefenderUpdater.exe	72
PID 556 wrote to memory of 368	556	WindowsDefenderUpdater.exe	72
PID 556 wrote to memory of 368	556	WindowsDefenderUpdater.exe	72
PID 556 wrote to memory of 368	556	WindowsDefenderUpdater.exe	72
PID 556 wrote to memory of 368	556	WindowsDefenderUpdater.exe	72
PID 556 wrote to memory of 368	556	WindowsDefenderUpdater.exe	72
PID 556 wrote to memory of 368	556	WindowsDefenderUpdater.exe	72
PID 556 wrote to memory of 1328	556	WindowsDefenderUpdater.exe	73
PID 556 wrote to memory of 1328	556	WindowsDefenderUpdater.exe	73
PID 1328 wrote to memory of 1640	1328	tmp174C.tmp.exe	74
PID 1328 wrote to memory of 1640	1328	tmp174C.tmp.exe	74

Suspicious behavior: EnumeratesProcesses 11 IoCs

pid	Process
752	crypted.exe
752	crypted.exe
752	crypted.exe
1640	powershell.exe
1640	powershell.exe
1640	powershell.exe
752	crypted.exe
752	crypted.exe
752	crypted.exe
3832	CDS.exe
3832	CDS.exe

JavaScript code in executable 2 IoCs

resource	yara_rule
behavioral2/files/0x000200000001adae-1.dat	js
behavioral2/files/0x000200000001adae-2.dat	js

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	752	crypted.exe
Token: SeDebugPrivilege	1640	powershell.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
1328	tmp174C.tmp.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
752	crypted.exe

Adds Run key to start application 2 TTPs 4 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce	b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\""	b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\WindowsDefenderUpdater.exe = "C:\\ProgramData\\WindowsDefenderUpdater.exe"	crypted.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-2066881839-3229799743-3576549721-1000\Software\Microsoft\Windows\CurrentVersion\Run\Chrome.exe = "C:\\Users\\Admin\\AppData\\Roaming\\Temp\\Chrome.exe"	powershell.exe

Executes dropped EXE 6 IoCs

pid	Process
3832	CDS.exe
3612	crypted.exe
752	crypted.exe
556	WindowsDefenderUpdater.exe
368	WindowsDefenderUpdater.exe
1328	tmp174C.tmp.exe

Loads dropped DLL 1 IoCs

pid	Process
3832	CDS.exe

Suspicious use of SetWindowsHookEx 2 IoCs

pid	Process
3832	CDS.exe
3832	CDS.exe

Suspicious use of SetThreadContext 2 IoCs

description	pid	Process	procid_target
PID 3612 set thread context of 752	3612	crypted.exe	70
PID 556 set thread context of 368	556	WindowsDefenderUpdater.exe	72

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	crypted.exe

NanoCore
NanoCore is a remote access tool (RAT) with a variety of capabilities.
keylogger trojan stealer spyware nanocore

C:\Users\Admin\AppData\Local\Temp\b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4.exe
"C:\Users\Admin\AppData\Local\Temp\b87295a4b2fb2d2f4df9d502d52e2f50a5e9b3ba9f56b17e252fa0f3022ae6f4.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Adds Run key to start application
PID:3828
- C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\CDS.exe
  C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\CDS.exe
  2⤵
  - Suspicious use of WriteProcessMemory
  - Suspicious behavior: EnumeratesProcesses
  - Executes dropped EXE
  - Loads dropped DLL
  - Suspicious use of SetWindowsHookEx
  PID:3832
- - C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\crypted.exe
    "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\crypted.exe"
    3⤵
    - Suspicious use of WriteProcessMemory
    - Adds Run key to start application
    - Executes dropped EXE
    - Suspicious use of SetThreadContext
    PID:3612
  - - C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\crypted.exe
      "C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\crypted.exe"
      4⤵
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of AdjustPrivilegeToken
      Suspicious behavior: GetForegroundWindowSpam
      Executes dropped EXE
      Checks whether UAC is enabled
      PID:752
  - - C:\ProgramData\WindowsDefenderUpdater.exe
      "C:\ProgramData\WindowsDefenderUpdater.exe"
      4⤵
      Suspicious use of WriteProcessMemory
      Executes dropped EXE
      Suspicious use of SetThreadContext
      PID:556
    - - C:\ProgramData\WindowsDefenderUpdater.exe
        
        "C:\ProgramData\WindowsDefenderUpdater.exe"
        5⤵
        Executes dropped EXE
        
        PID:368
    - - C:\Users\Admin\AppData\Local\Temp\tmp174C.tmp.exe
        
        "C:\Users\Admin\AppData\Local\Temp\tmp174C.tmp.exe"
        5⤵
        Suspicious use of WriteProcessMemory
        Suspicious behavior: AddClipboardFormatListener
        Executes dropped EXE
        
        PID:1328
      - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        
        "powershell.exe" Remove-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'Chrome.exe';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'Chrome.exe' -Value '"C:\Users\Admin\AppData\Roaming\Temp\Chrome.exe"' -PropertyType 'String'
        6⤵
        Suspicious behavior: EnumeratesProcesses
        Suspicious use of AdjustPrivilegeToken
        Adds Run key to start application
        
        PID:1640

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

memory/752-14-0x0000000000400000-0x000000000043A000-memory.dmp

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