Malware Analysis Report

2025-04-13 21:10

Sample ID 240126-nc6m6adfap
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 behavior: GetForegroundWindowSpam

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-26 11:16

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-26 11:16

Reported

2024-01-26 11:18

Platform

win7-20231215-en

Max time kernel

118s

Max time network

152s

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 3044 set thread context of 2832 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 3044 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3044 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3044 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3044 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3044 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3044 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3044 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3044 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 3044 wrote to memory of 2832 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2832 wrote to memory of 2932 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 2832 wrote to memory of 2932 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 2832 wrote to memory of 2932 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 2832 wrote to memory of 2932 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 "PCI Service" /xml "C:\Users\Admin\AppData\Local\Temp\tmp80B4.tmp"

Network

Country Destination Domain Proto
VN 103.167.90.225:4251 tcp

Files

memory/3044-0-0x0000000001100000-0x000000000119A000-memory.dmp

memory/3044-1-0x0000000074C50000-0x000000007533E000-memory.dmp

memory/3044-2-0x0000000004FC0000-0x0000000005000000-memory.dmp

memory/3044-3-0x00000000005B0000-0x00000000005C8000-memory.dmp

memory/3044-4-0x00000000005D0000-0x00000000005D8000-memory.dmp

memory/3044-5-0x00000000005E0000-0x00000000005EC000-memory.dmp

memory/3044-6-0x0000000004F10000-0x0000000004F84000-memory.dmp

memory/2832-7-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2832-9-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2832-11-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2832-13-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2832-15-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2832-17-0x0000000000400000-0x0000000000438000-memory.dmp

memory/3044-20-0x0000000074C50000-0x000000007533E000-memory.dmp

memory/2832-19-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2832-22-0x0000000000400000-0x0000000000438000-memory.dmp

memory/2832-23-0x0000000074560000-0x0000000074C4E000-memory.dmp

memory/2832-24-0x0000000004F00000-0x0000000004F40000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp80B4.tmp

MD5 42f7159e831591530fb8cdd62d4650a6
SHA1 5d951d429a25957ca5fc3be282774f148e2f4f81
SHA256 aac9dd0d2fd0398d7958c31af596794180e27ba287868cb762878fb470da3cc8
SHA512 8439116c6be44e4d1575ea62a7062951605d47af636eb9c292a7e671ebbeee23d14dbb0dae769e87a3ce11877bf41572f7e21a75a0015dbf9d3dfa8b8cc68bbc

memory/2832-29-0x0000000000490000-0x000000000049A000-memory.dmp

memory/2832-30-0x00000000005B0000-0x00000000005CE000-memory.dmp

memory/2832-31-0x00000000004A0000-0x00000000004AA000-memory.dmp

memory/2832-34-0x0000000000630000-0x0000000000642000-memory.dmp

memory/2832-35-0x0000000000650000-0x000000000066A000-memory.dmp

memory/2832-36-0x0000000000AC0000-0x0000000000ACE000-memory.dmp

memory/2832-37-0x0000000000C50000-0x0000000000C62000-memory.dmp

memory/2832-38-0x0000000000C70000-0x0000000000C7C000-memory.dmp

memory/2832-39-0x0000000000CC0000-0x0000000000CCE000-memory.dmp

memory/2832-40-0x0000000000CD0000-0x0000000000CE4000-memory.dmp

memory/2832-41-0x0000000000CE0000-0x0000000000CF0000-memory.dmp

memory/2832-42-0x0000000000CF0000-0x0000000000D04000-memory.dmp

memory/2832-43-0x0000000000D00000-0x0000000000D0E000-memory.dmp

memory/2832-44-0x0000000000FB0000-0x0000000000FDE000-memory.dmp

memory/2832-45-0x0000000000D60000-0x0000000000D74000-memory.dmp

memory/2832-47-0x0000000074560000-0x0000000074C4E000-memory.dmp

memory/2832-48-0x0000000004F00000-0x0000000004F40000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-26 11:16

Reported

2024-01-26 11:18

Platform

win10v2004-20231222-en

Max time kernel

145s

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 2240 set thread context of 1616 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 2240 wrote to memory of 3088 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 3088 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 3088 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 2240 wrote to memory of 1616 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Users\Admin\AppData\Local\Temp\gunzipped.exe
PID 1616 wrote to memory of 932 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 1616 wrote to memory of 932 N/A C:\Users\Admin\AppData\Local\Temp\gunzipped.exe C:\Windows\SysWOW64\schtasks.exe
PID 1616 wrote to memory of 932 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 "SMTP Subsystem" /xml "C:\Users\Admin\AppData\Local\Temp\tmp80B9.tmp"

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
VN 103.167.90.225:4251 tcp
US 8.8.8.8:53 225.90.167.103.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 187.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 170.117.168.52.in-addr.arpa udp

Files

memory/2240-0-0x0000000000870000-0x000000000090A000-memory.dmp

memory/2240-1-0x0000000074760000-0x0000000074F10000-memory.dmp

memory/2240-2-0x00000000059B0000-0x0000000005F54000-memory.dmp

memory/2240-3-0x0000000005320000-0x00000000053B2000-memory.dmp

memory/2240-4-0x00000000052C0000-0x00000000052D0000-memory.dmp

memory/2240-5-0x0000000005310000-0x000000000531A000-memory.dmp

memory/2240-6-0x0000000005670000-0x0000000005688000-memory.dmp

memory/2240-7-0x00000000065D0000-0x00000000065D8000-memory.dmp

memory/2240-8-0x0000000006700000-0x000000000670C000-memory.dmp

memory/2240-9-0x00000000069C0000-0x0000000006A34000-memory.dmp

memory/2240-10-0x0000000008FF0000-0x000000000908C000-memory.dmp

memory/1616-11-0x0000000000400000-0x0000000000438000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\gunzipped.exe.log

MD5 8ec831f3e3a3f77e4a7b9cd32b48384c
SHA1 d83f09fd87c5bd86e045873c231c14836e76a05c
SHA256 7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982
SHA512 26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

memory/1616-15-0x0000000074760000-0x0000000074F10000-memory.dmp

memory/2240-14-0x0000000074760000-0x0000000074F10000-memory.dmp

memory/1616-16-0x0000000005750000-0x0000000005760000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp80B9.tmp

MD5 42f7159e831591530fb8cdd62d4650a6
SHA1 5d951d429a25957ca5fc3be282774f148e2f4f81
SHA256 aac9dd0d2fd0398d7958c31af596794180e27ba287868cb762878fb470da3cc8
SHA512 8439116c6be44e4d1575ea62a7062951605d47af636eb9c292a7e671ebbeee23d14dbb0dae769e87a3ce11877bf41572f7e21a75a0015dbf9d3dfa8b8cc68bbc

memory/1616-21-0x0000000005580000-0x000000000558A000-memory.dmp

memory/1616-23-0x0000000006710000-0x000000000671A000-memory.dmp

memory/1616-22-0x00000000065F0000-0x000000000660E000-memory.dmp

memory/1616-26-0x0000000006D30000-0x0000000006D42000-memory.dmp

memory/1616-27-0x0000000006D40000-0x0000000006D5A000-memory.dmp

memory/1616-28-0x0000000006D70000-0x0000000006D7E000-memory.dmp

memory/1616-29-0x0000000006D80000-0x0000000006D92000-memory.dmp

memory/1616-30-0x0000000006D90000-0x0000000006D9C000-memory.dmp

memory/1616-31-0x0000000006DA0000-0x0000000006DAE000-memory.dmp

memory/1616-32-0x0000000006DB0000-0x0000000006DC4000-memory.dmp

memory/1616-33-0x0000000006DC0000-0x0000000006DD0000-memory.dmp

memory/1616-34-0x0000000006DE0000-0x0000000006DF4000-memory.dmp

memory/1616-35-0x0000000006E00000-0x0000000006E0E000-memory.dmp

memory/1616-36-0x0000000006E10000-0x0000000006E3E000-memory.dmp

memory/1616-37-0x0000000006E40000-0x0000000006E54000-memory.dmp

memory/1616-38-0x0000000007030000-0x0000000007096000-memory.dmp

memory/1616-40-0x0000000074760000-0x0000000074F10000-memory.dmp

memory/1616-41-0x0000000005750000-0x0000000005760000-memory.dmp