Malware Analysis Report

2024-10-23 19:38

Sample ID 240811-tzfcdaxdmq
Target SolaraV2.1 nano.exe
SHA256 83d064ee508b2543d3f9fc16f4ed16fee34cf130713d3cee54d5f20ce7f452cc
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

83d064ee508b2543d3f9fc16f4ed16fee34cf130713d3cee54d5f20ce7f452cc

Threat Level: Known bad

The file SolaraV2.1 nano.exe was found to be: Known bad.

Malicious Activity Summary

nanocore discovery 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

System Location Discovery: System Language Discovery

Scheduled Task/Job: Scheduled Task

Suspicious behavior: GetForegroundWindowSpam

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-11 16:29

Signatures

Nanocore family

nanocore

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-11 16:29

Reported

2024-08-11 16:30

Platform

win7-20240704-en

Max time kernel

16s

Max time network

16s

Command Line

"C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.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\LAN Subsystem = "C:\\Program Files (x86)\\LAN Subsystem\\lanss.exe" C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.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\SolaraV2.1 nano.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\LAN Subsystem\lanss.exe C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe N/A
File opened for modification C:\Program Files (x86)\LAN Subsystem\lanss.exe C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
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:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.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:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe

"C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "LAN Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmpC5CF.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "LAN Subsystem Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpC67B.tmp"

Network

Country Destination Domain Proto
N/A 127.0.0.1:54984 tcp
N/A 127.0.0.1:54984 tcp
N/A 127.0.0.1:54984 tcp
N/A 127.0.0.1:54984 tcp

Files

memory/2552-0-0x0000000074B41000-0x0000000074B42000-memory.dmp

memory/2552-1-0x0000000074B40000-0x00000000750EB000-memory.dmp

memory/2552-2-0x0000000074B40000-0x00000000750EB000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpC5CF.tmp

MD5 4bb70ae457112a038573b994ab89c3ae
SHA1 7e5057e0034d70f94c17c10438437b138f055780
SHA256 411a8d9306b8233d8dad43faae19467494e84a5458e6e2c461bc9db4c10a940c
SHA512 aaba48de49eb6fef60ec38e3f9f7ec3b4fc5962ff95259c9362afd01a30c6d290475b4c9c4dc5ba442de106ad4bde38d28768caf3f6aaf309e613cc115711dd1

C:\Users\Admin\AppData\Local\Temp\tmpC67B.tmp

MD5 924694e208642d4d8a4c7e0f0cba0de1
SHA1 87e9496a918036c3e3902f125b95a47e38548828
SHA256 8de0bab59a9fe15f312e81a373382ed992ce5110deb3813f663b92cfc5eae0b6
SHA512 ef3cfc08df53777f13fb51fdc0269f6f686c0df57c4dd72f395dc53d1d8ef2b08e33c3601507a45c3cc31a25b70ebf365d0fa93db64e1e851173216a45c49c2c

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-11 16:29

Reported

2024-08-11 16:30

Platform

win10v2004-20240802-en

Max time kernel

16s

Max time network

21s

Command Line

"C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.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\WPA Monitor = "C:\\Program Files (x86)\\WPA Monitor\\wpamon.exe" C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.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\SolaraV2.1 nano.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\Program Files (x86)\WPA Monitor\wpamon.exe C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe N/A
File opened for modification C:\Program Files (x86)\WPA Monitor\wpamon.exe C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.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\SolaraV2.1 nano.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:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe

"C:\Users\Admin\AppData\Local\Temp\SolaraV2.1 nano.exe"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "WPA Monitor" /xml "C:\Users\Admin\AppData\Local\Temp\tmp67DD.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "WPA Monitor Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmp684B.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 --field-trial-handle=4372,i,3861745594156495651,17595114179815238301,262144 --variations-seed-version --mojo-platform-channel-handle=1016 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
N/A 127.0.0.1:54984 tcp
N/A 127.0.0.1:54984 tcp
N/A 127.0.0.1:54984 tcp

Files

memory/1932-0-0x0000000074D62000-0x0000000074D63000-memory.dmp

memory/1932-1-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/1932-2-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/1932-4-0x0000000074D60000-0x0000000075311000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp67DD.tmp

MD5 4bb70ae457112a038573b994ab89c3ae
SHA1 7e5057e0034d70f94c17c10438437b138f055780
SHA256 411a8d9306b8233d8dad43faae19467494e84a5458e6e2c461bc9db4c10a940c
SHA512 aaba48de49eb6fef60ec38e3f9f7ec3b4fc5962ff95259c9362afd01a30c6d290475b4c9c4dc5ba442de106ad4bde38d28768caf3f6aaf309e613cc115711dd1

C:\Users\Admin\AppData\Local\Temp\tmp684B.tmp

MD5 a246b3561d823177f3586e629f144233
SHA1 0f05d12e55a1d2e5e6a4f307c193882fba093315
SHA256 6abae7707b06e52b58f537b335e367cc54b093e899d78f16e94ceaf7ceafca52
SHA512 4246aa9a96331e2c7e36b37fa778e31ecae055c77164e0dc673aa50cdec368f08d356ab06ef1a4540816c474828048ab1bebed7e211a4eb929f2918e1fac9c6d

memory/1932-11-0x0000000074D60000-0x0000000075311000-memory.dmp

memory/1932-12-0x0000000074D62000-0x0000000074D63000-memory.dmp

memory/1932-13-0x0000000074D60000-0x0000000075311000-memory.dmp