Malware Analysis Report

2024-08-06 14:44

Sample ID 240623-qmv1hswbjk
Target sd.exe
SHA256 1be5176e2bdc3b3434e8dc95c902e0cfaaaf7a23fc8203b413effc121011ad30
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

1be5176e2bdc3b3434e8dc95c902e0cfaaaf7a23fc8203b413effc121011ad30

Threat Level: Known bad

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

Malicious Activity Summary

nanocore evasion keylogger persistence spyware stealer trojan

NanoCore

Nanocore family

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: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

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

2024-06-23 13:23

Signatures

Nanocore family

nanocore

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-23 13:23

Reported

2024-06-23 13:25

Platform

win7-20240220-en

Max time kernel

118s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sd.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\TCP Subsystem = "C:\\Program Files (x86)\\TCP Subsystem\\tcpss.exe" C:\Users\Admin\AppData\Local\Temp\sd.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\sd.exe N/A

Drops file in Program Files directory

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

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2924 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2924 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2924 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2924 wrote to memory of 2512 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2924 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2924 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2924 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 2924 wrote to memory of 2628 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "TCP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp83B.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "TCP Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp8C8.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 care-somewhere.gl.at.ply.gg udp
US 147.185.221.20:38177 care-somewhere.gl.at.ply.gg tcp
US 147.185.221.20:38177 care-somewhere.gl.at.ply.gg tcp

Files

memory/2924-0-0x0000000074BE1000-0x0000000074BE2000-memory.dmp

memory/2924-1-0x0000000074BE0000-0x000000007518B000-memory.dmp

memory/2924-2-0x0000000074BE0000-0x000000007518B000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp83B.tmp

MD5 f7d890eac080bcc878916c23c4b34c3d
SHA1 efa80352399bfd5c91b958dbc45228560e3a2b7e
SHA256 a7c1ea9b3651907399af17cb4bbaa5696b6a4f0bdcb04640842fa7af3bf0a670
SHA512 a03dfd061d8fe7d01333fbdc641a92d9daa56dd21758ce788ea3a5114de16fcc37acd5f7bb0aaad5b23dc74c50ce51ab80603f429bd61292d81497ce68287085

C:\Users\Admin\AppData\Local\Temp\tmp8C8.tmp

MD5 4b7ef560289c0f62d0baf6f14f48a57a
SHA1 8331acb90dde588aa3196919f6e847f398fd06d1
SHA256 062844155306130d6fafc4fe10ac9e5ddd2ed462532b729c50cdc979c0d83207
SHA512 ecaa27c4b703d95f9f9b37d8c339982970482e7dab968c2010e0aa644bbfa31973111aafb827565af30c423d1d14e4ff997ec149614e713ff7ef3456894d02d8

memory/2924-13-0x0000000074BE0000-0x000000007518B000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-23 13:23

Reported

2024-06-23 13:25

Platform

win10v2004-20240611-en

Max time kernel

140s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\sd.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\DHCP Service = "C:\\Program Files (x86)\\DHCP Service\\dhcpsv.exe" C:\Users\Admin\AppData\Local\Temp\sd.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\sd.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\DHCP Service\dhcpsv.exe C:\Users\Admin\AppData\Local\Temp\sd.exe N/A
File opened for modification C:\Program Files (x86)\DHCP Service\dhcpsv.exe C:\Users\Admin\AppData\Local\Temp\sd.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\sd.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sd.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sd.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sd.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sd.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\sd.exe N/A

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3144 wrote to memory of 3840 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 3144 wrote to memory of 3840 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 3144 wrote to memory of 3840 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 3144 wrote to memory of 4844 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 3144 wrote to memory of 4844 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe
PID 3144 wrote to memory of 4844 N/A C:\Users\Admin\AppData\Local\Temp\sd.exe C:\Windows\SysWOW64\schtasks.exe

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DHCP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp3A69.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DHCP Service Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp3AB8.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 care-somewhere.gl.at.ply.gg udp
US 147.185.221.20:38177 care-somewhere.gl.at.ply.gg tcp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 20.221.185.147.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 16.24.18.2.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 25.24.18.2.in-addr.arpa udp
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
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

memory/3144-0-0x00000000751D2000-0x00000000751D3000-memory.dmp

memory/3144-1-0x00000000751D0000-0x0000000075781000-memory.dmp

memory/3144-2-0x00000000751D0000-0x0000000075781000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp3A69.tmp

MD5 f7d890eac080bcc878916c23c4b34c3d
SHA1 efa80352399bfd5c91b958dbc45228560e3a2b7e
SHA256 a7c1ea9b3651907399af17cb4bbaa5696b6a4f0bdcb04640842fa7af3bf0a670
SHA512 a03dfd061d8fe7d01333fbdc641a92d9daa56dd21758ce788ea3a5114de16fcc37acd5f7bb0aaad5b23dc74c50ce51ab80603f429bd61292d81497ce68287085

C:\Users\Admin\AppData\Local\Temp\tmp3AB8.tmp

MD5 a77c223a0fc492dccd6fb9975f7a8766
SHA1 5e813636ae9b8138d78919348a5da3a6e8bd74b5
SHA256 589df7325d42409c50827600fedb240171ee4bdab85916474a37800c2382829e
SHA512 315cea8fde3c594404f5d3c96c710af1214cff6d08ccdb40634a739e108ff810e02624735a2b8c3e3720157b4a55327f317c3c23c3a681b46b9ab0f19060f7c0

memory/3144-10-0x00000000751D0000-0x0000000075781000-memory.dmp

memory/3144-19-0x00000000751D2000-0x00000000751D3000-memory.dmp

memory/3144-20-0x00000000751D0000-0x0000000075781000-memory.dmp

memory/3144-21-0x00000000751D0000-0x0000000075781000-memory.dmp