Malware Analysis Report

2024-08-06 14:45

Sample ID 240626-gzm11ascrk
Target dildobuttsex.exe
SHA256 bda855dc115902664e92ff1c4b945f367ea2a9372dc00d7b2f560ab15aca4835
Tags
nanocore evasion keylogger persistence spyware stealer trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

bda855dc115902664e92ff1c4b945f367ea2a9372dc00d7b2f560ab15aca4835

Threat Level: Known bad

The file dildobuttsex.exe was found to be: Known bad.

Malicious Activity Summary

nanocore evasion keylogger persistence spyware stealer trojan

Nanocore family

NanoCore

Adds Run key to start application

Checks whether UAC is enabled

Drops file in Program Files directory

Unsigned PE

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Persistence
TA0003
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Privilege Escalation
TA0004
Boot or Logon Autostart Execution
T1547
Registry Run Keys / Startup Folder
T1547.001
Scheduled Task/Job
T1053
Scheduled Task
T1053.005
Defense Evasion
TA0005
Modify Registry
T1112
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-26 06:14

Signatures

Nanocore family

nanocore

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-26 06:14

Reported

2024-06-26 06:17

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

157s

Command Line

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

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\SMTP Subsystem = "C:\\Program Files (x86)\\SMTP Subsystem\\smtpss.exe" C:\Users\Admin\AppData\Local\Temp\dildobuttsex.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:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\SMTP Subsystem\smtpss.exe C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe N/A
File opened for modification C:\Program Files (x86)\SMTP Subsystem\smtpss.exe C:\Users\Admin\AppData\Local\Temp\dildobuttsex.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:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 772 wrote to memory of 3852 N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe C:\Windows\SysWOW64\schtasks.exe
PID 772 wrote to memory of 3852 N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe C:\Windows\SysWOW64\schtasks.exe
PID 772 wrote to memory of 3852 N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe C:\Windows\SysWOW64\schtasks.exe
PID 772 wrote to memory of 3220 N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe C:\Windows\SysWOW64\schtasks.exe
PID 772 wrote to memory of 3220 N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe C:\Windows\SysWOW64\schtasks.exe
PID 772 wrote to memory of 3220 N/A C:\Users\Admin\AppData\Local\Temp\dildobuttsex.exe C:\Windows\SysWOW64\schtasks.exe

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp33FC.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "SMTP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp3CC7.tmp"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1036 --field-trial-handle=2900,i,14549994492153927475,12895178890800740987,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 82.90.14.23.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 20.221.185.147.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp
US 8.8.8.8:53 193.98.74.40.in-addr.arpa udp
US 8.8.8.8:53 t-protecting.gl.at.ply.gg udp
US 147.185.221.20:24735 t-protecting.gl.at.ply.gg tcp

Files

memory/772-0-0x00000000750F2000-0x00000000750F3000-memory.dmp

memory/772-1-0x00000000750F0000-0x00000000756A1000-memory.dmp

memory/772-2-0x00000000750F0000-0x00000000756A1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp33FC.tmp

MD5 1156c8494f802c2458973e9358495fde
SHA1 0e0eca23efc056ebe032b95b94d2246f05946874
SHA256 467138bedaa8358054acdb93ed4237f4e8125471402d2046a2fd26016500e353
SHA512 a8bfb90b48042703209d2c7437af324c9b42e34447a33dbbb50a706b89fb388ce3e807c99c98cc904491e7bdb8c68a4247b48f9632ebc3e18a892b0059e8c82a

C:\Users\Admin\AppData\Local\Temp\tmp3CC7.tmp

MD5 0339b45ef206f4becc88be0d65e24b9e
SHA1 6503a1851f4ccd8c80a31f96bd7ae40d962c9fad
SHA256 3d568a47a8944a47f4aed6982755ac7ff7dda469cc1c81c213ecaa5d89de1f83
SHA512 c98f4513db34d50510dd986e0d812545c442bd5bef26932032b165759627fab4e00c95fe907ab3416a8a1042bfa77aa516c479f1ff7d1ec2f21ae66df8f72551

memory/772-10-0x00000000750F2000-0x00000000750F3000-memory.dmp

memory/772-11-0x00000000750F0000-0x00000000756A1000-memory.dmp

memory/772-12-0x00000000750F0000-0x00000000756A1000-memory.dmp

memory/772-13-0x00000000750F0000-0x00000000756A1000-memory.dmp