Malware Analysis Report

2025-01-02 09:46

Sample ID 240831-bhkxesxcln
Target 21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe
SHA256 21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814
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

21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814

Threat Level: Known bad

The file 21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe was found to be: Known bad.

Malicious Activity Summary

gcleaner discovery loader

GCleaner

Downloads MZ/PE file

Deletes itself

Loads dropped DLL

Program crash

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Suspicious use of AdjustPrivilegeToken

Kills process with taskkill

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-31 01:08

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 01:08

Reported

2024-08-31 01:11

Platform

win7-20240704-en

Max time kernel

122s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.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\21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.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\21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe

"C:\Users\Admin\AppData\Local\Temp\21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe" /f

Network

Country Destination Domain Proto
RU 80.66.75.114:80 80.66.75.114 tcp

Files

memory/2728-1-0x00000000005A0000-0x00000000006A0000-memory.dmp

memory/2728-2-0x0000000000220000-0x000000000025C000-memory.dmp

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

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

memory/2728-13-0x00000000005A0000-0x00000000006A0000-memory.dmp

memory/2728-15-0x0000000000220000-0x000000000025C000-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/2728-17-0x0000000000400000-0x000000000044E000-memory.dmp

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

\Users\Admin\AppData\Local\Temp\pYT4RirHhETiddhzBjmVuD0L\Y-Cleaner.exe

MD5 a8cf5621811f7fac55cfe8cb3fa6b9f6
SHA1 121356839e8138a03141f5f5856936a85bd2a474
SHA256 614a0362ab87cee48d0935b5bb957d539be1d94c6fdeb3fe42fac4fbe182c10c
SHA512 4479d951435f222ca7306774002f030972c9f1715d6aaf512fca9420dd79cb6d08240f80129f213851773290254be34f0ff63c7b1f4d554a7db5f84b69e84bdd

memory/2728-35-0x0000000000400000-0x000000000044E000-memory.dmp

memory/2728-36-0x00000000005A0000-0x00000000006A0000-memory.dmp

memory/2728-37-0x0000000000400000-0x000000000043F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 01:08

Reported

2024-08-31 01:11

Platform

win10v2004-20240802-en

Max time kernel

134s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe"

Signatures

GCleaner

loader gcleaner

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\21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe

"C:\Users\Admin\AppData\Local\Temp\21feed85dcffec9c7a76343729beecd6a53ffe854d972af207edddf154da1814.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4120 -ip 4120

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 448

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 524 -p 4120 -ip 4120

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4120 -s 520

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=3808,i,3387628439405076340,17957358341235678872,262144 --variations-seed-version --mojo-platform-channel-handle=1892 /prefetch:8

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 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 25.140.123.92.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 24.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.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 43.58.199.20.in-addr.arpa udp

Files

memory/4120-1-0x0000000000550000-0x0000000000650000-memory.dmp

memory/4120-2-0x00000000004F0000-0x000000000052C000-memory.dmp

memory/4120-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/4120-4-0x0000000000400000-0x000000000044E000-memory.dmp

memory/4120-5-0x00000000004F0000-0x000000000052C000-memory.dmp