Malware Analysis Report

2024-12-07 14:03

Sample ID 241112-w252xsycqa
Target imapsvc.exe
SHA256 2891d3f5c09b5c18946ee0dd7b6274b682b32f591c77cdaa140fff29856e1ceb
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 Overview

score
10/10

SHA256

2891d3f5c09b5c18946ee0dd7b6274b682b32f591c77cdaa140fff29856e1ceb

Threat Level: Known bad

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

Malicious Activity Summary

nanocore discovery evasion keylogger persistence spyware stealer trojan

Nanocore family

NanoCore

Checks whether UAC is enabled

Adds Run key to start application

Drops file in Program Files directory

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Scheduled Task/Job: Scheduled Task

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-12 18:26

Signatures

Nanocore family

nanocore

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-12 18:26

Reported

2024-11-12 18:27

Platform

win10v2004-20241007-en

Max time kernel

15s

Max time network

13s

Command Line

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

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

Nanocore family

nanocore

Adds Run key to start application

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

Drops file in Program Files directory

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

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of AdjustPrivilegeToken

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

Processes

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DHCP Host" /xml "C:\Users\Admin\AppData\Local\Temp\tmpD86E.tmp"

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DHCP Host Task" /xml "C:\Users\Admin\AppData\Local\Temp\tmpD8CD.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 nanocore3317.ddns.net udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 71.208.201.84.in-addr.arpa udp
US 8.8.4.4:53 nanocore3317.ddns.net udp
US 8.8.8.8:53 nanocore3317.ddns.net udp
US 8.8.8.8:53 4.4.8.8.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 nanocore3317.ddns.net udp
US 8.8.4.4:53 nanocore3317.ddns.net udp
US 8.8.8.8:53 nanocore3317.ddns.net udp
US 8.8.4.4:53 nanocore3317.ddns.net udp
US 8.8.8.8:53 nanocore3317.ddns.net udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
N/A 127.0.0.1:5353 tcp

Files

memory/2060-0-0x0000000074B52000-0x0000000074B53000-memory.dmp

memory/2060-1-0x0000000074B50000-0x0000000075101000-memory.dmp

memory/2060-2-0x0000000074B50000-0x0000000075101000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpD86E.tmp

MD5 596e28ec651a34651a6593a8d0f38644
SHA1 8bf1a6d3b6c04e65f9fe0910b92650c58ea9d85f
SHA256 2026e95ee5b5d738fe3dcd5e1f173f2bab13a89745af040fdfbecb53e0157d40
SHA512 41dc9f8fb12c0d11a7b065b86136205525f5b0dbc411f2963af8a7a8ba4ac6d741b37b72e2be1d6adb0a5a2a2e972af7c148fbe8d976179740c57741e7541442

C:\Users\Admin\AppData\Local\Temp\tmpD8CD.tmp

MD5 0479d5f304ef2d7e3c15fb24a99f88c1
SHA1 8edbb1450a656fac5f5e96779ffe440ee8c1aec9
SHA256 112557c2b2d0c669a3b115129dc32f005341e965330fa8f2ad3e5de1926594bc
SHA512 537e8d87e5cd975f0e69bb145f81d6e9d7b0d82eed143ac351304ea38577137386a51fdb7357ec6d641eb04ff5f51e249bba2db8a4b5bf2934d561394a4a3f15

memory/2060-10-0x0000000074B50000-0x0000000075101000-memory.dmp

memory/2060-11-0x0000000074B52000-0x0000000074B53000-memory.dmp

memory/2060-12-0x0000000074B50000-0x0000000075101000-memory.dmp

memory/2060-13-0x0000000074B50000-0x0000000075101000-memory.dmp

memory/2060-14-0x0000000074B50000-0x0000000075101000-memory.dmp