Malware Analysis Report

2025-01-02 09:44

Sample ID 240904-yk3atavfrn
Target e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d
SHA256 e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d
Tags
gcleaner discovery loader stealc default1 stealer
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

e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d

Threat Level: Known bad

The file e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d was found to be: Known bad.

Malicious Activity Summary

gcleaner discovery loader stealc default1 stealer

Stealc

GCleaner

Downloads MZ/PE file

Checks computer location settings

Executes dropped EXE

Program crash

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

Kills process with taskkill

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-04 19:51

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-04 19:51

Reported

2024-09-04 19:54

Platform

win10v2004-20240802-en

Max time kernel

96s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe"

Signatures

GCleaner

loader gcleaner

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe N/A

Enumerates physical storage devices

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\taskkill.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe

"C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 3892 -ip 3892

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe" /f

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3892 -s 1600

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 69.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
RU 80.66.75.114:80 80.66.75.114 tcp
US 8.8.8.8:53 114.75.66.80.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 52.111.227.13:443 tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp

Files

memory/3892-1-0x0000000000710000-0x0000000000810000-memory.dmp

memory/3892-2-0x00000000021B0000-0x00000000021EB000-memory.dmp

memory/3892-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/3892-8-0x0000000010000000-0x000000001001C000-memory.dmp

memory/3892-13-0x0000000000710000-0x0000000000810000-memory.dmp

memory/3892-15-0x0000000000400000-0x0000000000452000-memory.dmp

memory/3892-16-0x00000000021B0000-0x00000000021EB000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\BOIFDBOU\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/3892-18-0x0000000000400000-0x000000000043F000-memory.dmp

memory/3892-27-0x0000000000400000-0x0000000000452000-memory.dmp

memory/3892-36-0x0000000000400000-0x000000000043F000-memory.dmp

memory/3892-35-0x0000000000400000-0x0000000000452000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-04 19:51

Reported

2024-09-04 19:54

Platform

win11-20240802-en

Max time kernel

92s

Max time network

94s

Command Line

"C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe"

Signatures

GCleaner

loader gcleaner

Stealc

stealer stealc

Downloads MZ/PE file

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\7i01gPfd136\QZqH6UrtNhq.exe N/A

Enumerates physical storage devices

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\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Roaming\7i01gPfd136\QZqH6UrtNhq.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\taskkill.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe

"C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe"

C:\Users\Admin\AppData\Roaming\7i01gPfd136\QZqH6UrtNhq.exe

"C:\Users\Admin\AppData\Roaming\7i01gPfd136\QZqH6UrtNhq.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2792 -ip 2792

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2792 -s 348

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 2468 -ip 2468

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "e8420995c724cb799a7fde56eece43118fca98fbaf816403f35ee96d471f727d.exe" /f

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2468 -s 1672

Network

Country Destination Domain Proto
RU 80.66.75.114:80 80.66.75.114 tcp
US 8.8.8.8:53 114.75.66.80.in-addr.arpa udp

Files

memory/2468-1-0x0000000000670000-0x0000000000770000-memory.dmp

memory/2468-2-0x0000000002160000-0x000000000219B000-memory.dmp

memory/2468-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2468-8-0x0000000010000000-0x000000001001C000-memory.dmp

C:\Users\Admin\AppData\Roaming\7i01gPfd136\QZqH6UrtNhq.exe

MD5 d63a5f65717d98eb8f68beab148286a4
SHA1 4444722c6d10546061ff20f520a3051bf49bac61
SHA256 5a390321cc87a474f3834d0dc8c9ef5f8ad4b3606deafca96c9366fc31a7ace9
SHA512 5f9938221e40fcaa858016f0814fb7547cb0e025a9ee70cd2d6a4f1395be4d58e85f90d28ff99b60da23059911f6bdaee4dce1827488cc604e98949ee9f96393

memory/2792-18-0x0000000000400000-0x0000000000643000-memory.dmp

memory/2792-17-0x0000000000400000-0x0000000000643000-memory.dmp

memory/2792-19-0x0000000000400000-0x0000000000643000-memory.dmp

memory/2468-21-0x0000000000670000-0x0000000000770000-memory.dmp

memory/2468-22-0x0000000002160000-0x000000000219B000-memory.dmp

memory/2468-23-0x0000000000400000-0x0000000000452000-memory.dmp

memory/2468-24-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2468-32-0x0000000000400000-0x0000000000452000-memory.dmp

memory/2468-33-0x0000000000400000-0x000000000043F000-memory.dmp