Malware Analysis Report

2025-01-02 09:39

Sample ID 240831-pswcsstdkn
Target 40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623
SHA256 40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623
Tags
gcleaner discovery loader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623

Threat Level: Known bad

The file 40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623 was found to be: Known bad.

Malicious Activity Summary

gcleaner discovery loader

GCleaner

Downloads MZ/PE file

Deletes itself

Loads dropped DLL

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

Program crash

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

2024-08-31 12:36

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 12:36

Reported

2024-08-31 12:38

Platform

win10v2004-20240802-en

Max time kernel

134s

Max time network

140s

Command Line

"C:\Users\Admin\AppData\Local\Temp\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.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\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.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\cmd.exe N/A
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\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.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\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe

"C:\Users\Admin\AppData\Local\Temp\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 456

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 764

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 784

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 544 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 824

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 816

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 560 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 928

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 1004

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 1072

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 1568

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 520 -p 2716 -ip 2716

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2716 -s 492

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe" /f

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 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.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 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.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 55.36.223.20.in-addr.arpa udp

Files

memory/2716-2-0x0000000002220000-0x000000000225C000-memory.dmp

memory/2716-1-0x0000000000880000-0x0000000000980000-memory.dmp

memory/2716-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2716-8-0x0000000010000000-0x000000001001C000-memory.dmp

memory/2716-13-0x0000000000880000-0x0000000000980000-memory.dmp

memory/2716-16-0x0000000002220000-0x000000000225C000-memory.dmp

memory/2716-15-0x0000000000400000-0x00000000005F7000-memory.dmp

memory/2716-17-0x0000000000400000-0x000000000043F000-memory.dmp

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

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/2716-27-0x0000000000400000-0x00000000005F7000-memory.dmp

memory/2716-36-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2716-35-0x0000000000400000-0x00000000005F7000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 12:36

Reported

2024-08-31 12:38

Platform

win7-20240705-en

Max time kernel

121s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.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

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\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.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\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe

"C:\Users\Admin\AppData\Local\Temp\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "40373b2b67af54380809aadcc91404f2a24c343bf3230ff02abb79847995a623.exe" /f

Network

Country Destination Domain Proto
RU 80.66.75.114:80 80.66.75.114 tcp

Files

memory/2784-1-0x0000000000750000-0x0000000000850000-memory.dmp

memory/2784-2-0x0000000000220000-0x000000000025C000-memory.dmp

memory/2784-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2784-8-0x0000000010000000-0x000000001001C000-memory.dmp

memory/2784-13-0x0000000000750000-0x0000000000850000-memory.dmp

memory/2784-15-0x0000000000220000-0x000000000025C000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\1VX38S3F\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/2784-18-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2784-17-0x0000000000400000-0x00000000005F7000-memory.dmp

\Users\Admin\AppData\Local\Temp\r373zA6BkwiWutN1UKazwDbXE\Y-Cleaner.exe

MD5 a8cf5621811f7fac55cfe8cb3fa6b9f6
SHA1 121356839e8138a03141f5f5856936a85bd2a474
SHA256 614a0362ab87cee48d0935b5bb957d539be1d94c6fdeb3fe42fac4fbe182c10c
SHA512 4479d951435f222ca7306774002f030972c9f1715d6aaf512fca9420dd79cb6d08240f80129f213851773290254be34f0ff63c7b1f4d554a7db5f84b69e84bdd

memory/2784-37-0x0000000000400000-0x000000000043F000-memory.dmp

memory/2784-36-0x0000000000750000-0x0000000000850000-memory.dmp

memory/2784-35-0x0000000000400000-0x00000000005F7000-memory.dmp