Malware Analysis Report

2024-10-23 19:38

Sample ID 240813-cjtfmayfnh
Target fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10
SHA256 fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10
Tags
nanocore discovery evasion keylogger persistence spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10

Threat Level: Known bad

The file fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10 was found to be: Known bad.

Malicious Activity Summary

nanocore discovery evasion keylogger persistence spyware stealer trojan

NanoCore

Drops startup file

Checks whether UAC is enabled

Adds Run key to start application

Suspicious use of SetThreadContext

AutoIT Executable

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Scheduled Task/Job: Scheduled Task

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of SendNotifyMessage

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-13 02:06

Signatures

AutoIT Executable

Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-13 02:06

Reported

2024-08-13 02:09

Platform

win7-20240704-en

Max time kernel

134s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe"

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PasswordOnWakeSettingFlyout.url C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\ARP Host = "C:\\Program Files (x86)\\ARP Host\\arphost.exe" C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1292 set thread context of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\ARP Host\arphost.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
File opened for modification C:\Program Files (x86)\ARP Host\arphost.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\schtasks.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\schtasks.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1292 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 1292 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 1292 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 1292 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 1292 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 1292 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 1292 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 1292 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 1292 wrote to memory of 2504 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2504 wrote to memory of 2660 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2504 wrote to memory of 2660 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2504 wrote to memory of 2660 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2504 wrote to memory of 2660 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2504 wrote to memory of 332 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2504 wrote to memory of 332 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2504 wrote to memory of 332 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2504 wrote to memory of 332 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe

"C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "ARP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmp581F.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "ARP Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp587D.tmp"

Network

Country Destination Domain Proto
NL 213.184.126.143:1993 tcp
NL 213.184.126.143:1993 tcp
NL 213.184.126.143:1993 tcp
NL 213.184.126.143:1993 tcp
NL 213.184.126.143:1993 tcp

Files

memory/1292-0-0x00000000001A0000-0x00000000001A1000-memory.dmp

memory/2504-1-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2504-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2504-9-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2504-8-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2504-2-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2504-10-0x0000000074212000-0x0000000074214000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp581F.tmp

MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969

C:\Users\Admin\AppData\Local\Temp\tmp587D.tmp

MD5 447ab194ab36cb1d20078d80e502b1b2
SHA1 a947b3b2c91d7c50bb8d39bd4fc91a0d0cc5b1c0
SHA256 8d5304b20b7d7dea223ce2738e5668054250d57bf6bed86b305b69924bd472f5
SHA512 49ddc557f7f6635627eea9bf0fa12a14b7b13edb235ed560ee0044a7f87fe27b686ff878d347d0273d92eb0b318b8c2bca85c0fbf42d586ed7d7da39eac6a327

memory/2504-21-0x0000000074212000-0x0000000074214000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-13 02:06

Reported

2024-08-13 02:09

Platform

win10v2004-20240802-en

Max time kernel

138s

Max time network

145s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe"

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\PasswordOnWakeSettingFlyout.url C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\NAS Monitor = "C:\\Program Files (x86)\\NAS Monitor\\nasmon.exe" C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4900 set thread context of 1520 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\NAS Monitor\nasmon.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
File opened for modification C:\Program Files (x86)\NAS Monitor\nasmon.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\schtasks.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\schtasks.exe N/A

Scheduled Task/Job: Scheduled Task

persistence execution
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A
N/A N/A C:\Windows\SysWOW64\schtasks.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4900 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4900 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4900 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4900 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4900 wrote to memory of 1520 N/A C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 1520 wrote to memory of 2024 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 1520 wrote to memory of 2024 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 1520 wrote to memory of 2024 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 1520 wrote to memory of 3352 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 1520 wrote to memory of 3352 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 1520 wrote to memory of 3352 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe

"C:\Users\Admin\AppData\Local\Temp\fb61a45129971e26464bce0bdacfd1033c3197fda59571e0d339edb2327bde10.exe"

C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe

"C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "NAS Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmp947B.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "NAS Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp94CA.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 13.107.21.237:443 g.bing.com tcp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 237.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 147.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
NL 213.184.126.143:1993 tcp
NL 213.184.126.143:1993 tcp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
NL 213.184.126.143:1993 tcp
NL 213.184.126.143:1993 tcp
NL 213.184.126.143:1993 tcp

Files

memory/4900-0-0x0000000000DB0000-0x0000000000DB1000-memory.dmp

memory/1520-2-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1520-6-0x0000000074302000-0x0000000074303000-memory.dmp

memory/1520-7-0x0000000074300000-0x00000000748B1000-memory.dmp

memory/1520-8-0x0000000074300000-0x00000000748B1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp947B.tmp

MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969

C:\Users\Admin\AppData\Local\Temp\tmp94CA.tmp

MD5 3144131f2fe1c35ad2aafff167a26f59
SHA1 959879de38aed11bc08b7725500d2c8c953e80bf
SHA256 d20aeda9cadd332268afc89cbee76f297b00f061bf69a2f558a8d7657e4c41d7
SHA512 27a07c8f953cc4fde9ec348d3f5c4621ab56ff281b778bc7ac95dd808d5f0eea6969c5e4662efc00a6416c8bcf4d8e3892be5c99e603e36f8aa49d2a957206fb

memory/1520-19-0x0000000074302000-0x0000000074303000-memory.dmp

memory/1520-20-0x0000000074300000-0x00000000748B1000-memory.dmp