Malware Analysis Report

2024-10-23 19:38

Sample ID 240813-2fs35avapr
Target 93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d
SHA256 93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d
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

93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d

Threat Level: Known bad

The file 93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d was found to be: Known bad.

Malicious Activity Summary

nanocore discovery evasion keylogger persistence spyware stealer trojan

NanoCore

Drops startup file

Adds Run key to start application

Checks whether UAC is enabled

Suspicious use of SetThreadContext

AutoIT Executable

Drops file in Program Files directory

Unsigned PE

System Location Discovery: System Language Discovery

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of FindShellTrayWindow

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-13 22:31

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 22:31

Reported

2024-08-13 22:34

Platform

win7-20240704-en

Max time kernel

136s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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\SMTP Monitor = "C:\\Program Files (x86)\\SMTP Monitor\\smtpmon.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 2164 set thread context of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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)\SMTP Monitor\smtpmon.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
File opened for modification C:\Program Files (x86)\SMTP Monitor\smtpmon.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\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.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 2164 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2164 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2164 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2164 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2164 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2164 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2164 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2164 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2164 wrote to memory of 2760 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 2760 wrote to memory of 2968 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2760 wrote to memory of 2968 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2760 wrote to memory of 2968 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2760 wrote to memory of 2968 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2760 wrote to memory of 2640 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2760 wrote to memory of 2640 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2760 wrote to memory of 2640 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 2760 wrote to memory of 2640 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe

"C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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 "SMTP Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmp5207.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "SMTP Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp536E.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/2164-0-0x00000000005B0000-0x00000000005B1000-memory.dmp

memory/2760-1-0x0000000000090000-0x00000000000C8000-memory.dmp

memory/2760-2-0x0000000000090000-0x00000000000C8000-memory.dmp

memory/2760-9-0x0000000000090000-0x00000000000C8000-memory.dmp

memory/2760-8-0x0000000000090000-0x00000000000C8000-memory.dmp

memory/2760-6-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2760-10-0x0000000074432000-0x0000000074434000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp5207.tmp

MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969

C:\Users\Admin\AppData\Local\Temp\tmp536E.tmp

MD5 ffa9e95100598072ca693c672478895f
SHA1 518514c3112c51b2b21d36d3262bec72e83d025d
SHA256 1e45d509d390405f93e9f3b64ff497e61cf9bf791c015dde4499184b7a681eb3
SHA512 010d14ae46a23cef14cf1de9a06c8e6ff26ca86c10ebdd3d5f16f4ffbeacc3df7ca18fafda097e00bf747fb997c5c4f9d62646e47a3b501da7c630689c28d6df

memory/2760-21-0x0000000074432000-0x0000000074434000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-13 22:31

Reported

2024-08-13 22:34

Platform

win10v2004-20240802-en

Max time kernel

140s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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\DNS Monitor = "C:\\Program Files (x86)\\DNS Monitor\\dnsmon.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 3904 set thread context of 4832 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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)\DNS Monitor\dnsmon.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe N/A
File opened for modification C:\Program Files (x86)\DNS Monitor\dnsmon.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\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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 3904 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 3904 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 3904 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 3904 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 3904 wrote to memory of 4832 N/A C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe
PID 4832 wrote to memory of 760 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 4832 wrote to memory of 760 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 4832 wrote to memory of 760 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 4832 wrote to memory of 4924 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 4832 wrote to memory of 4924 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe
PID 4832 wrote to memory of 4924 N/A C:\Windows\Microsoft.NET\Framework\v2.0.50727\RegAsm.exe C:\Windows\SysWOW64\schtasks.exe

Processes

C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.exe

"C:\Users\Admin\AppData\Local\Temp\93dca55303be7695ef1bd5347fe6f9ad727bf90b46e688796465569ada325d7d.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 "DNS Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmpE579.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DNS Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpE5D8.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
NL 213.184.126.143:1993 tcp
NL 213.184.126.143:1993 tcp
US 8.8.8.8:53 57.169.31.20.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/4832-1-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3904-5-0x0000000001730000-0x0000000001731000-memory.dmp

memory/4832-6-0x0000000073A12000-0x0000000073A13000-memory.dmp

memory/4832-7-0x0000000073A10000-0x0000000073FC1000-memory.dmp

memory/4832-8-0x0000000073A10000-0x0000000073FC1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpE579.tmp

MD5 c6f0625bf4c1cdfb699980c9243d3b22
SHA1 43de1fe580576935516327f17b5da0c656c72851
SHA256 8dfc4e937f0b2374e3ced25fce344b0731cf44b8854625b318d50ece2da8f576
SHA512 9ef2dbd4142ad0e1e6006929376ecb8011e7ffc801ee2101e906787d70325ad82752df65839de9972391fa52e1e5974ec1a5c7465a88aa56257633ebb7d70969

C:\Users\Admin\AppData\Local\Temp\tmpE5D8.tmp

MD5 7620b805f7bc12c79e126656c858d0e0
SHA1 89f09b8b4ef1fc421ddf5ed0cbbe012fab7fd666
SHA256 4d6ea014d135bdc4a5fd4281ce705672561b0279deab4302e06cbfe95e1080a6
SHA512 b02ac735c98b20020251a23ffa1b0308ad3a1c99593a15a8020d742472b0d5c36caa31c6ca2372e88cfd3b6792206ea7920162c2a33c83da24f0098c0513f562

memory/4832-19-0x0000000073A10000-0x0000000073FC1000-memory.dmp

memory/4832-20-0x0000000073A12000-0x0000000073A13000-memory.dmp

memory/4832-21-0x0000000073A10000-0x0000000073FC1000-memory.dmp