Malware Analysis Report

2025-01-02 09:44

Sample ID 240905-dx26cstblb
Target 639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b
SHA256 639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b
Tags
gcleaner discovery loader
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

639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b

Threat Level: Known bad

The file 639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b was found to be: Known bad.

Malicious Activity Summary

gcleaner discovery loader

GCleaner

Downloads MZ/PE file

Checks computer location settings

Program crash

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-05 03:24

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-05 03:24

Reported

2024-09-05 03:26

Platform

win10v2004-20240802-en

Max time kernel

90s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe"

Signatures

GCleaner

loader gcleaner

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2392887640-1187051047-2909758433-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.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\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.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\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe

"C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4124 -ip 4124

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe" /f

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4124 -s 1692

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.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 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 52.111.229.48:443 tcp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/4124-1-0x0000000000540000-0x0000000000640000-memory.dmp

memory/4124-2-0x00000000004F0000-0x000000000052B000-memory.dmp

memory/4124-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/4124-8-0x0000000010000000-0x000000001001C000-memory.dmp

memory/4124-13-0x0000000000540000-0x0000000000640000-memory.dmp

memory/4124-15-0x0000000000400000-0x0000000000452000-memory.dmp

memory/4124-16-0x00000000004F0000-0x000000000052B000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\ZK5NPJWQ\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/4124-18-0x0000000000400000-0x000000000043F000-memory.dmp

memory/4124-29-0x0000000000400000-0x0000000000452000-memory.dmp

memory/4124-35-0x0000000000400000-0x0000000000452000-memory.dmp

memory/4124-36-0x0000000000400000-0x000000000043F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-05 03:24

Reported

2024-09-05 03:26

Platform

win11-20240802-en

Max time kernel

31s

Max time network

142s

Command Line

"C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe"

Signatures

GCleaner

loader gcleaner

Downloads MZ/PE file

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\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.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\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe

"C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "639b2741f024e5d2f78170b472c90762680feaebf2473e24e0bf49b54297c25b.exe" /f

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 2728 -ip 2728

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2728 -s 1688

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/2728-1-0x0000000000850000-0x0000000000950000-memory.dmp

memory/2728-2-0x0000000000800000-0x000000000083B000-memory.dmp

memory/2728-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2728-8-0x0000000010000000-0x000000001001C000-memory.dmp

memory/2728-13-0x0000000000850000-0x0000000000950000-memory.dmp

memory/2728-15-0x0000000000400000-0x0000000000452000-memory.dmp

memory/2728-16-0x0000000000800000-0x000000000083B000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\WC3VGW7B\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/2728-18-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2728-29-0x0000000000400000-0x0000000000452000-memory.dmp

memory/2728-35-0x0000000000400000-0x0000000000452000-memory.dmp

memory/2728-36-0x0000000000400000-0x000000000043F000-memory.dmp