Malware Analysis Report

2025-01-02 09:36

Sample ID 240507-k8c4yacf85
Target ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0
SHA256 ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0
Tags
gcleaner 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

ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0

Threat Level: Known bad

The file ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0 was found to be: Known bad.

Malicious Activity Summary

gcleaner loader

GCleaner

Checks computer location settings

Unsigned PE

Enumerates physical storage devices

Program crash

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-07 09:15

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-07 09:15

Reported

2024-05-07 09:18

Platform

win10v2004-20240426-en

Max time kernel

141s

Max time network

105s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe"

Signatures

GCleaner

loader gcleaner

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3571316656-3665257725-2415531812-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe N/A

Enumerates physical storage devices

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\ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe

"C:\Users\Admin\AppData\Local\Temp\ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2936 -ip 2936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 740

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2936 -ip 2936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 780

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2936 -ip 2936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 740

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2936 -ip 2936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 832

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2936 -ip 2936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 904

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2936 -ip 2936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 980

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2936 -ip 2936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 1080

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2936 -ip 2936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 1340

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2936 -ip 2936

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2936 -s 1432

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe" /f

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 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 69.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
GB 23.73.138.88:443 www.bing.com tcp
US 8.8.8.8:53 88.138.73.23.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
GB 23.73.138.88:443 www.bing.com tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
DE 185.172.128.90:80 185.172.128.90 tcp
US 8.8.8.8:53 90.128.172.185.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 139.53.16.96.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/2936-2-0x0000000002D90000-0x0000000002DBD000-memory.dmp

memory/2936-1-0x0000000002C90000-0x0000000002D90000-memory.dmp

memory/2936-3-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2936-7-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2936-6-0x0000000002D90000-0x0000000002DBD000-memory.dmp

memory/2936-5-0x0000000000400000-0x0000000002B09000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-07 09:15

Reported

2024-05-07 09:18

Platform

win11-20240426-en

Max time kernel

147s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe"

Signatures

GCleaner

loader gcleaner

Enumerates physical storage devices

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\ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe

"C:\Users\Admin\AppData\Local\Temp\ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4028 -ip 4028

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 772

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4028 -ip 4028

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 812

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 4028 -ip 4028

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 852

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 508 -p 4028 -ip 4028

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 772

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4028 -ip 4028

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 976

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 4028 -ip 4028

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 1076

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 4028 -ip 4028

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 1444

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4028 -ip 4028

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "ff1e3a8e37987c9969d99b704c952cd2b95bc490a5a17ec06c15e2eda103f3f0.exe" /f

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4028 -s 1388

Network

Country Destination Domain Proto
DE 185.172.128.90:80 185.172.128.90 tcp
US 8.8.8.8:53 90.128.172.185.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp

Files

memory/4028-3-0x0000000000400000-0x000000000042F000-memory.dmp

memory/4028-2-0x0000000002E50000-0x0000000002E7D000-memory.dmp

memory/4028-1-0x0000000002C40000-0x0000000002D40000-memory.dmp

memory/4028-6-0x0000000000400000-0x000000000042F000-memory.dmp

memory/4028-5-0x0000000000400000-0x0000000002B09000-memory.dmp