Malware Analysis Report

2025-01-02 09:46

Sample ID 240831-bkrgzsxapa
Target 2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe
SHA256 2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443
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

2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443

Threat Level: Known bad

The file 2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe was found to be: Known bad.

Malicious Activity Summary

gcleaner discovery loader

GCleaner

Deletes itself

Checks computer location settings

Program crash

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-31 01:12

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 01:12

Reported

2024-08-31 01:15

Platform

win7-20240704-en

Max time kernel

120s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe"

Signatures

GCleaner

loader gcleaner

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\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.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\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe

"C:\Users\Admin\AppData\Local\Temp\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe" /f

Network

Country Destination Domain Proto
RU 80.66.75.114:80 80.66.75.114 tcp

Files

memory/808-1-0x00000000004C0000-0x00000000005C0000-memory.dmp

memory/808-2-0x00000000002A0000-0x00000000002CD000-memory.dmp

memory/808-3-0x0000000000400000-0x000000000042F000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\4RXRX1VH\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/808-9-0x00000000004C0000-0x00000000005C0000-memory.dmp

memory/808-11-0x00000000002A0000-0x00000000002CD000-memory.dmp

memory/808-12-0x0000000000400000-0x0000000000446000-memory.dmp

memory/808-13-0x0000000000400000-0x000000000042F000-memory.dmp

memory/808-21-0x0000000000400000-0x0000000000446000-memory.dmp

memory/808-23-0x0000000000400000-0x000000000042F000-memory.dmp

memory/808-22-0x00000000004C0000-0x00000000005C0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 01:12

Reported

2024-08-31 01:15

Platform

win10v2004-20240802-en

Max time kernel

139s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe"

Signatures

GCleaner

loader gcleaner

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.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\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.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\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe

"C:\Users\Admin\AppData\Local\Temp\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2192 -ip 2192

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 732

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 516 -p 2192 -ip 2192

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 760

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=3840,i,8231329449558834090,4540802069600791165,262144 --variations-seed-version --mojo-platform-channel-handle=1048 /prefetch:8

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 2192 -ip 2192

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 760

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 528 -p 2192 -ip 2192

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 732

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 576 -p 2192 -ip 2192

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 904

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 2192 -ip 2192

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 980

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 600 -p 2192 -ip 2192

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 1116

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 596 -p 2192 -ip 2192

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 1324

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 568 -p 2192 -ip 2192

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 1308

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "2f6c256196127c2b28211a50f2c9a69f50226506fed6b1a528eea6574a2d0443.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 g.bing.com udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 92.16.208.104.in-addr.arpa udp

Files

memory/2192-1-0x0000000000610000-0x0000000000710000-memory.dmp

memory/2192-2-0x00000000004D0000-0x00000000004FD000-memory.dmp

memory/2192-3-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2192-7-0x0000000000400000-0x0000000000446000-memory.dmp

memory/2192-9-0x0000000000610000-0x0000000000710000-memory.dmp

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

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/2192-11-0x00000000004D0000-0x00000000004FD000-memory.dmp

memory/2192-12-0x0000000000400000-0x000000000042F000-memory.dmp

memory/2192-21-0x0000000000400000-0x0000000000446000-memory.dmp

memory/2192-22-0x0000000000400000-0x000000000042F000-memory.dmp