Malware Analysis Report

2025-01-02 09:43

Sample ID 240905-2pebbstakf
Target 9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108
SHA256 9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108
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

9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108

Threat Level: Known bad

The file 9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108 was found to be: Known bad.

Malicious Activity Summary

gcleaner discovery loader

GCleaner

Deletes itself

Unsigned PE

System Location Discovery: System Language Discovery

Program crash

Enumerates physical storage devices

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-05 22:45

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-05 22:45

Reported

2024-09-05 22:50

Platform

win7-20240903-en

Max time kernel

122s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe"

Signatures

GCleaner

loader gcleaner

Deletes itself

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

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\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.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\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe

"C:\Users\Admin\AppData\Local\Temp\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe" /f

Network

Country Destination Domain Proto
RU 80.66.75.114:80 80.66.75.114 tcp

Files

memory/2632-1-0x0000000000250000-0x0000000000350000-memory.dmp

memory/2632-2-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2632-3-0x0000000000400000-0x00000000005FB000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\01LB6K3J\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/2632-9-0x0000000000250000-0x0000000000350000-memory.dmp

memory/2632-11-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2632-12-0x0000000000400000-0x00000000005FB000-memory.dmp

memory/2632-23-0x0000000000250000-0x0000000000350000-memory.dmp

memory/2632-22-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2632-21-0x0000000000400000-0x00000000005FB000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-05 22:45

Reported

2024-09-05 22:50

Platform

win10-20240404-en

Max time kernel

195s

Max time network

298s

Command Line

"C:\Users\Admin\AppData\Local\Temp\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe"

Signatures

GCleaner

loader gcleaner

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\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.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\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe

"C:\Users\Admin\AppData\Local\Temp\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 760

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 808

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 768

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 968

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 1008

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 1092

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 1124

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4512 -s 1272

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "9bf7c1a6f1ad7d8f4cf95d56162a3865c22e8ebc229c3dbc97a237047c044108.exe" /f

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
US 8.8.8.8:53 0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.0.8.0.8.0.8.0.ip6.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 18.173.189.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp

Files

memory/4512-2-0x0000000000740000-0x000000000076D000-memory.dmp

memory/4512-1-0x00000000007A0000-0x00000000008A0000-memory.dmp

memory/4512-3-0x0000000000400000-0x000000000042F000-memory.dmp

memory/4512-8-0x00000000007A0000-0x00000000008A0000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\E49JWOHD\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/4512-10-0x0000000000740000-0x000000000076D000-memory.dmp

memory/4512-13-0x0000000000400000-0x000000000042F000-memory.dmp

memory/4512-11-0x0000000000400000-0x00000000005FB000-memory.dmp

memory/4512-22-0x0000000000400000-0x000000000042F000-memory.dmp

memory/4512-21-0x0000000000400000-0x00000000005FB000-memory.dmp