nanocore | b8a20c7281f3e0db60291a81218833c0626f1ebdb7c855d905c76116728d0122

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07/12/2024, 12:44

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General

Target
d282825b8b00810fd3afa4798e314766_JaffaCakes118.exe
Size 879KB
Sample241207-pygrlaxrar
SHA256 b8a20c7281f3e0db60291a81218833c0626f1ebdb7c855d905c76116728d0122
MD5 d282825b8b00810fd3afa4798e314766
SHA1 d8c174803c539d05a74b46a0da663735c12b1d06
SHA512 1a7a17e019e369cefa9f6f6d13589065409b96550a23ef450520621d3138b18f869ae3f2aab8d1f8b5eccc2ee26b6e6ac599e3b9ca5ac06e0f1673db2952d14e
SSDEEP 12288:uaWzgMg7v3qnCiMErQohh0F4CCJ8lny/QM7urd7dkVgH4yGwS2+GN7DGOA:ZaHMv6Corjqny/QM7C2ylP+Y7DGN
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

nanocore defense_evasion discovery evasion keylogger persistence spyware stealer trojan

Malware Config

Extracted

Family

nanocore

Version

1.2.2.0

178.172.236.15:1337

Mutex

174eea91-c6a6-480d-ba58-84ac033bdb25

Attributes

activate_away_mode
true
backup_connection_host
178.172.236.15
backup_dns_server
8.8.4.4
buffer_size
65535
build_time
2016-01-27T11:19:35.243537036Z
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
1337
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
174eea91-c6a6-480d-ba58-84ac033bdb25
mutex_timeout
5000
prevent_system_sleep
false
primary_connection_host
178.172.236.15
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

Executes dropped EXE 1 IoCs

pid	Process
3680	system.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\Microsoft Corporation JZCESgWePSWWUHda = "C:\\Users\\Admin\\AppData\\Roaming\\JZCESgWePSWWUHda.exe"	system.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\PCI Subsystem = "C:\\Program Files (x86)\\PCI Subsystem\\pciss.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

AutoIT Executable 1 IoCs

AutoIT scripts compiled to PE executables.

resource	yara_rule
behavioral2/files/0x000d000000023b7e-10.dat	autoit_exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3680 set thread context of 2316	3680	system.exe	83

Drops file in Program Files directory 2 IoCs

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

Subvert Trust Controls: Mark-of-the-Web Bypass 1 TTPs 3 IoCs

When files are downloaded from the Internet, they are tagged with a hidden NTFS Alternate Data Stream (ADS) named Zone.Identifier with a specific value known as the MOTW.

defense_evasion

SIP and Trust Provider Hijacking

T1553.003

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\system.exe:Zone.Identifier:$DATA	d282825b8b00810fd3afa4798e314766_JaffaCakes118.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\system.exe:Zone.Identifier:$DATA	system.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\JZCESgWePSWWUHda.exe:Zone.Identifier:$DATA	system.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 5 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	d282825b8b00810fd3afa4798e314766_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	system.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

NTFS ADS 4 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\system.exe:Zone.Identifier:$DATA	d282825b8b00810fd3afa4798e314766_JaffaCakes118.exe
File created	C:\Users\Admin\AppData\Roaming\JZCESgWePSWWUHda.exe\:Zone.Identifier:$DATA	system.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\system.exe:Zone.Identifier:$DATA	system.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\JZCESgWePSWWUHda.exe:Zone.Identifier:$DATA	system.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
1696	schtasks.exe
4892	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
2316	RegAsm.exe
2316	RegAsm.exe
2316	RegAsm.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe
3680	system.exe

Suspicious behavior: GetForegroundWindowSpam 2 IoCs

pid	Process
3680	system.exe
2316	RegAsm.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2316	RegAsm.exe

Suspicious use of WriteProcessMemory 17 IoCs

description	pid	Process	procid_target
PID 3980 wrote to memory of 3680	3980	d282825b8b00810fd3afa4798e314766_JaffaCakes118.exe	82
PID 3980 wrote to memory of 3680	3980	d282825b8b00810fd3afa4798e314766_JaffaCakes118.exe	82
PID 3980 wrote to memory of 3680	3980	d282825b8b00810fd3afa4798e314766_JaffaCakes118.exe	82
PID 3680 wrote to memory of 2316	3680	system.exe	83
PID 3680 wrote to memory of 2316	3680	system.exe	83
PID 3680 wrote to memory of 2316	3680	system.exe	83
PID 3680 wrote to memory of 2316	3680	system.exe	83
PID 3680 wrote to memory of 2316	3680	system.exe	83
PID 3680 wrote to memory of 2316	3680	system.exe	83
PID 3680 wrote to memory of 2316	3680	system.exe	83
PID 3680 wrote to memory of 2316	3680	system.exe	83
PID 2316 wrote to memory of 1696	2316	RegAsm.exe	84
PID 2316 wrote to memory of 1696	2316	RegAsm.exe	84
PID 2316 wrote to memory of 1696	2316	RegAsm.exe	84
PID 2316 wrote to memory of 4892	2316	RegAsm.exe	86
PID 2316 wrote to memory of 4892	2316	RegAsm.exe	86
PID 2316 wrote to memory of 4892	2316	RegAsm.exe	86

C:\Users\Admin\AppData\Local\Temp\d282825b8b00810fd3afa4798e314766_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\d282825b8b00810fd3afa4798e314766_JaffaCakes118.exe"
1⤵
- Subvert Trust Controls: Mark-of-the-Web Bypass
- System Location Discovery: System Language Discovery
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:3980
- C:\Users\Admin\AppData\Roaming\system.exe
  C:\Users\Admin\AppData\Roaming\system.exe
  2⤵
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious use of SetThreadContext
  - Subvert Trust Controls: Mark-of-the-Web Bypass
  - System Location Discovery: System Language Discovery
  - NTFS ADS
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of WriteProcessMemory
  PID:3680
- - C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
    "C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"
    3⤵
    - 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:2316
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "PCI Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB565.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:1696
  - - C:\Windows\SysWOW64\schtasks.exe
      "schtasks.exe" /create /f /tn "PCI Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpB5E3.tmp"
      4⤵
      System Location Discovery: System Language Discovery
      Scheduled Task/Job: Scheduled Task
      PID:4892

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

Subvert Trust Controls

T1553

SIP and Trust Provider Hijacking

T1553.003

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

autB1CB.tmp

Path C:\Users\Admin\AppData\Local\Temp\autB1CB.tmp
Size 203KB
SHA256 af9f0b6225ef28d7b5c4791c2a697bccb9b60cd827ce9779c1310cd66600324e
MD5 023b2cc81a56d12cd009cf877170e024
SHA1 a865ff4102b3e973d71b1deafb103f22b2b98bfc
SHA512 58e359f7539668cc4d4df805c9163dfd1c3a2e22cadaa0c9c3de258d47eeb9a5433869de4f94ce6ac5173ea7567e8414912b048d6c8e621ad17c1a4cff041b15
SSDEEP 3072:pSt0Xqbm0eWryptVbbbJW1cnVLHAUKgwrGZs+D3ZoEDmenkF5AAuQc1F:pSK6bm0BatVbxW1OVLsSO+71nkjUQc/
MD5 SHA1 SHA512 SSDEEP

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tmpB565.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpB565.tmp
Size 1KB
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969
MD5 SHA1 SHA512

Submit Download

tmpB5E3.tmp

Path C:\Users\Admin\AppData\Local\Temp\tmpB5E3.tmp
Size 1KB
SHA256 369b159ef60c988373a3c85e0b10b5ff2178504465f11965ab0d66f14124f9a1
MD5 09063e7cc0d66a9aed53f2e2d2409103
SHA1 96f8fa15b5a3b2646f6691770a158c69ea7405a4
SHA512 c460a3cab70270c5cefe0464df6ddb9d50bb58ac9c49c7e62c9a55cc6bc30b6411cbc28ae418dd91b1ba1190f8394ccd937452ae70d7062740207d2ffc68e2ec
MD5 SHA1 SHA512

Submit Download

system.exe

Path C:\Users\Admin\AppData\Roaming\system.exe
Size 879KB
SHA256 b8a20c7281f3e0db60291a81218833c0626f1ebdb7c855d905c76116728d0122
MD5 d282825b8b00810fd3afa4798e314766
SHA1 d8c174803c539d05a74b46a0da663735c12b1d06
SHA512 1a7a17e019e369cefa9f6f6d13589065409b96550a23ef450520621d3138b18f869ae3f2aab8d1f8b5eccc2ee26b6e6ac599e3b9ca5ac06e0f1673db2952d14e
SSDEEP 12288:uaWzgMg7v3qnCiMErQohh0F4CCJ8lny/QM7urd7dkVgH4yGwS2+GN7DGOA:ZaHMv6Corjqny/QM7C2ylP+Y7DGN
MD5 SHA1 SHA512 SSDEEP

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memory/2316-21-0x0000000000400000-0x0000000000438000-memory.dmp

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memory/2316-26-0x00000000737E2000-0x00000000737E3000-memory.dmp

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memory/2316-27-0x00000000737E0000-0x0000000073D91000-memory.dmp

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memory/2316-28-0x00000000737E0000-0x0000000073D91000-memory.dmp

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memory/2316-36-0x00000000737E2000-0x00000000737E3000-memory.dmp

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memory/2316-37-0x00000000737E0000-0x0000000073D91000-memory.dmp

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memory/2316-38-0x00000000737E0000-0x0000000073D91000-memory.dmp

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