Malware Analysis Report

2025-01-02 09:46

Sample ID 240831-fm5vlsxbjk
Target f74d9d3a01e6bbea9af8f55da53ebaa0N.exe
SHA256 b9e89992ec807bc2537c0faa87d6c691538dd1c1e606a90a6914faae5a258b56
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

b9e89992ec807bc2537c0faa87d6c691538dd1c1e606a90a6914faae5a258b56

Threat Level: Known bad

The file f74d9d3a01e6bbea9af8f55da53ebaa0N.exe was found to be: Known bad.

Malicious Activity Summary

gcleaner discovery loader

GCleaner

Downloads MZ/PE file

Checks computer location settings

Deletes itself

Loads dropped DLL

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Program crash

Suspicious use of AdjustPrivilegeToken

Kills process with taskkill

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-31 05:00

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 05:00

Reported

2024-08-31 05:02

Platform

win7-20240704-en

Max time kernel

32s

Max time network

32s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f74d9d3a01e6bbea9af8f55da53ebaa0N.exe"

Signatures

GCleaner

loader gcleaner

Downloads MZ/PE file

Deletes itself

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

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\f74d9d3a01e6bbea9af8f55da53ebaa0N.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\f74d9d3a01e6bbea9af8f55da53ebaa0N.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\f74d9d3a01e6bbea9af8f55da53ebaa0N.exe

"C:\Users\Admin\AppData\Local\Temp\f74d9d3a01e6bbea9af8f55da53ebaa0N.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "f74d9d3a01e6bbea9af8f55da53ebaa0N.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\f74d9d3a01e6bbea9af8f55da53ebaa0N.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "f74d9d3a01e6bbea9af8f55da53ebaa0N.exe" /f

Network

Country Destination Domain Proto
RU 80.66.75.114:80 80.66.75.114 tcp

Files

memory/2120-1-0x0000000000270000-0x0000000000370000-memory.dmp

memory/2120-2-0x00000000004A0000-0x00000000004DC000-memory.dmp

memory/2120-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2120-8-0x0000000010000000-0x000000001001C000-memory.dmp

memory/2120-12-0x0000000000270000-0x0000000000370000-memory.dmp

memory/2120-14-0x00000000004A0000-0x00000000004DC000-memory.dmp

memory/2120-16-0x0000000000400000-0x0000000000454000-memory.dmp

memory/2120-17-0x0000000000400000-0x000000000043F000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\69P6875H\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/2120-29-0x0000000000400000-0x0000000000454000-memory.dmp

\Users\Admin\AppData\Local\Temp\ZxOrfDum1kawaGKe\Y-Cleaner.exe

MD5 a8cf5621811f7fac55cfe8cb3fa6b9f6
SHA1 121356839e8138a03141f5f5856936a85bd2a474
SHA256 614a0362ab87cee48d0935b5bb957d539be1d94c6fdeb3fe42fac4fbe182c10c
SHA512 4479d951435f222ca7306774002f030972c9f1715d6aaf512fca9420dd79cb6d08240f80129f213851773290254be34f0ff63c7b1f4d554a7db5f84b69e84bdd

memory/2120-38-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2120-37-0x0000000000270000-0x0000000000370000-memory.dmp

memory/2120-36-0x0000000000400000-0x0000000000454000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 05:00

Reported

2024-08-31 05:02

Platform

win10v2004-20240802-en

Max time kernel

95s

Max time network

96s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f74d9d3a01e6bbea9af8f55da53ebaa0N.exe"

Signatures

GCleaner

loader gcleaner

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2718105630-359604950-2820636825-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\f74d9d3a01e6bbea9af8f55da53ebaa0N.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\f74d9d3a01e6bbea9af8f55da53ebaa0N.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\f74d9d3a01e6bbea9af8f55da53ebaa0N.exe

"C:\Users\Admin\AppData\Local\Temp\f74d9d3a01e6bbea9af8f55da53ebaa0N.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 224 -ip 224

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 452

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 224 -ip 224

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 764

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 224 -ip 224

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 788

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 224 -ip 224

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 828

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 484 -p 224 -ip 224

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 780

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 224 -ip 224

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 928

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 224 -ip 224

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 928

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 224 -ip 224

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 224 -s 1624

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "f74d9d3a01e6bbea9af8f55da53ebaa0N.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\f74d9d3a01e6bbea9af8f55da53ebaa0N.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "f74d9d3a01e6bbea9af8f55da53ebaa0N.exe" /f

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.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 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 147.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp

Files

memory/224-2-0x0000000002070000-0x00000000020AC000-memory.dmp

memory/224-1-0x00000000006D0000-0x00000000007D0000-memory.dmp

memory/224-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/224-8-0x0000000010000000-0x000000001001C000-memory.dmp

memory/224-13-0x00000000006D0000-0x00000000007D0000-memory.dmp

memory/224-14-0x0000000000400000-0x0000000000454000-memory.dmp

memory/224-16-0x0000000002070000-0x00000000020AC000-memory.dmp

memory/224-17-0x0000000000400000-0x000000000043F000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\VNN58CU3\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/224-36-0x0000000000400000-0x000000000043F000-memory.dmp

memory/224-35-0x0000000000400000-0x0000000000454000-memory.dmp