Malware Analysis Report

2025-04-13 21:10

Sample ID 240126-nc3lhadfal
Target gunzipped.exe
SHA256 4ba298859e61cb9c39d9d4a4d556fe6357ce0901d5d4ac6f78e6e15ced75cccb
Tags
nanocore evasion keylogger 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

4ba298859e61cb9c39d9d4a4d556fe6357ce0901d5d4ac6f78e6e15ced75cccb

Threat Level: Known bad

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

Malicious Activity Summary

nanocore evasion keylogger spyware stealer trojan

NanoCore

Checks whether UAC is enabled

Suspicious use of SetThreadContext

Unsigned PE

Creates scheduled task(s)

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-26 11:15

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-26 11:15

Reported

2024-01-26 11:18

Platform

win7-20231215-en

Max time kernel

117s

Max time network

149s

Command Line

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

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

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\gunzipped.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2108 set thread context of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe

Creates scheduled task(s)

persistence
Description Indicator Process Target
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\gunzipped.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2108 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2108 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2108 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2108 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2108 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2108 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2108 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2108 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2108 wrote to memory of 1676 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1676 wrote to memory of 2848 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 1676 wrote to memory of 2848 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 1676 wrote to memory of 2848 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 1676 wrote to memory of 2848 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe

Processes

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

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

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "LAN Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp44AE.tmp"

Network

Country Destination Domain Proto
VN 103.167.90.225:4251 tcp

Files

memory/2108-0-0x0000000000270000-0x000000000030A000-memory.dmp

memory/2108-1-0x0000000074B10000-0x00000000751FE000-memory.dmp

memory/2108-2-0x0000000002080000-0x00000000020C0000-memory.dmp

memory/2108-3-0x0000000001D60000-0x0000000001D78000-memory.dmp

memory/2108-4-0x0000000001D90000-0x0000000001D98000-memory.dmp

memory/2108-5-0x0000000001E80000-0x0000000001E8C000-memory.dmp

memory/2108-6-0x0000000005430000-0x00000000054A4000-memory.dmp

memory/1676-7-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1676-9-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1676-11-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1676-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1676-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/1676-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2108-19-0x0000000074B10000-0x00000000751FE000-memory.dmp

memory/1676-20-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1676-22-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1676-24-0x0000000004D30000-0x0000000004D70000-memory.dmp

memory/1676-23-0x0000000074B10000-0x00000000751FE000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp44AE.tmp

MD5 42f7159e831591530fb8cdd62d4650a6
SHA1 5d951d429a25957ca5fc3be282774f148e2f4f81
SHA256 aac9dd0d2fd0398d7958c31af596794180e27ba287868cb762878fb470da3cc8
SHA512 8439116c6be44e4d1575ea62a7062951605d47af636eb9c292a7e671ebbeee23d14dbb0dae769e87a3ce11877bf41572f7e21a75a0015dbf9d3dfa8b8cc68bbc

memory/1676-29-0x0000000000480000-0x000000000048A000-memory.dmp

memory/1676-30-0x00000000004F0000-0x000000000050E000-memory.dmp

memory/1676-31-0x0000000000490000-0x000000000049A000-memory.dmp

memory/1676-34-0x00000000005C0000-0x00000000005D2000-memory.dmp

memory/1676-35-0x00000000005D0000-0x00000000005EA000-memory.dmp

memory/1676-36-0x0000000000810000-0x000000000081E000-memory.dmp

memory/1676-37-0x0000000000820000-0x0000000000832000-memory.dmp

memory/1676-38-0x0000000002070000-0x000000000207C000-memory.dmp

memory/1676-39-0x0000000002100000-0x000000000210E000-memory.dmp

memory/1676-40-0x0000000002110000-0x0000000002124000-memory.dmp

memory/1676-41-0x0000000002120000-0x0000000002130000-memory.dmp

memory/1676-42-0x0000000002170000-0x0000000002184000-memory.dmp

memory/1676-43-0x0000000004550000-0x000000000455E000-memory.dmp

memory/1676-44-0x0000000004C20000-0x0000000004C4E000-memory.dmp

memory/1676-45-0x0000000004CD0000-0x0000000004CE4000-memory.dmp

memory/1676-47-0x0000000074B10000-0x00000000751FE000-memory.dmp

memory/1676-48-0x0000000004D30000-0x0000000004D70000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-26 11:15

Reported

2024-01-26 11:18

Platform

win10v2004-20231215-en

Max time kernel

92s

Max time network

156s

Command Line

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

Signatures

NanoCore

keylogger trojan stealer spyware nanocore

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\gunzipped.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4004 set thread context of 1372 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe

Creates scheduled task(s)

persistence
Description Indicator Process Target
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\gunzipped.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4004 wrote to memory of 3956 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 3956 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 3956 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 1372 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 1372 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 1372 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 1372 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 1372 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 1372 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 1372 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 4004 wrote to memory of 1372 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1372 wrote to memory of 5084 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 1372 wrote to memory of 5084 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 1372 wrote to memory of 5084 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe

Processes

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

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

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

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

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

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

C:\Windows\SysWOW64\schtasks.exe

"schtasks.exe" /create /f /tn "DHCP Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp4522.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
VN 103.167.90.225:4251 tcp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 225.90.167.103.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 114.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/4004-0-0x0000000074A90000-0x0000000075240000-memory.dmp

memory/4004-1-0x0000000000D90000-0x0000000000E2A000-memory.dmp

memory/4004-2-0x0000000005D10000-0x00000000062B4000-memory.dmp

memory/4004-3-0x0000000005810000-0x00000000058A2000-memory.dmp

memory/4004-4-0x00000000057E0000-0x00000000057F0000-memory.dmp

memory/4004-5-0x00000000059D0000-0x00000000059DA000-memory.dmp

memory/4004-6-0x0000000005B00000-0x0000000005B18000-memory.dmp

memory/4004-7-0x0000000074A90000-0x0000000075240000-memory.dmp

memory/4004-8-0x0000000005C60000-0x0000000005C68000-memory.dmp

memory/4004-9-0x0000000005C90000-0x0000000005C9C000-memory.dmp

memory/4004-10-0x0000000007290000-0x0000000007304000-memory.dmp

memory/4004-11-0x00000000098F0000-0x000000000998C000-memory.dmp

memory/1372-12-0x0000000000400000-0x0000000000438000-memory.dmp

memory/1372-14-0x0000000074A90000-0x0000000075240000-memory.dmp

memory/4004-15-0x00000000057E0000-0x00000000057F0000-memory.dmp

memory/4004-16-0x0000000074A90000-0x0000000075240000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp4522.tmp

MD5 42f7159e831591530fb8cdd62d4650a6
SHA1 5d951d429a25957ca5fc3be282774f148e2f4f81
SHA256 aac9dd0d2fd0398d7958c31af596794180e27ba287868cb762878fb470da3cc8
SHA512 8439116c6be44e4d1575ea62a7062951605d47af636eb9c292a7e671ebbeee23d14dbb0dae769e87a3ce11877bf41572f7e21a75a0015dbf9d3dfa8b8cc68bbc

memory/1372-21-0x0000000005560000-0x000000000556A000-memory.dmp

memory/1372-22-0x0000000005570000-0x000000000558E000-memory.dmp

memory/1372-23-0x00000000059C0000-0x00000000059CA000-memory.dmp

memory/1372-26-0x00000000059E0000-0x00000000059F2000-memory.dmp

memory/1372-27-0x0000000006BD0000-0x0000000006BEA000-memory.dmp

memory/1372-28-0x0000000006C00000-0x0000000006C0E000-memory.dmp

memory/1372-29-0x0000000006C10000-0x0000000006C22000-memory.dmp

memory/1372-30-0x0000000006C20000-0x0000000006C2C000-memory.dmp

memory/1372-31-0x0000000006C30000-0x0000000006C3E000-memory.dmp

memory/1372-32-0x0000000006C40000-0x0000000006C54000-memory.dmp

memory/1372-33-0x0000000006C50000-0x0000000006C60000-memory.dmp

memory/1372-34-0x0000000006C70000-0x0000000006C84000-memory.dmp

memory/1372-35-0x0000000006C90000-0x0000000006C9E000-memory.dmp

memory/1372-36-0x0000000006CA0000-0x0000000006CCE000-memory.dmp

memory/1372-37-0x0000000006CD0000-0x0000000006CE4000-memory.dmp

memory/1372-38-0x0000000006FF0000-0x0000000007056000-memory.dmp

memory/1372-40-0x0000000074A90000-0x0000000075240000-memory.dmp