Malware Analysis Report

2025-01-02 09:46

Sample ID 240831-pq936stdje
Target fbf158cad766092142f47e1a0f2f9c00N.exe
SHA256 827fe43726e6b1a41ad3a1647902b0391bdf82d1b440896ad86eed97e3b25a55
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

827fe43726e6b1a41ad3a1647902b0391bdf82d1b440896ad86eed97e3b25a55

Threat Level: Known bad

The file fbf158cad766092142f47e1a0f2f9c00N.exe was found to be: Known bad.

Malicious Activity Summary

gcleaner discovery loader

GCleaner

Deletes itself

Checks computer location settings

Enumerates physical storage devices

Unsigned PE

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 12:33

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 12:33

Reported

2024-08-31 12:35

Platform

win7-20240704-en

Max time kernel

23s

Max time network

24s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fbf158cad766092142f47e1a0f2f9c00N.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\fbf158cad766092142f47e1a0f2f9c00N.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\fbf158cad766092142f47e1a0f2f9c00N.exe

"C:\Users\Admin\AppData\Local\Temp\fbf158cad766092142f47e1a0f2f9c00N.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "fbf158cad766092142f47e1a0f2f9c00N.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\fbf158cad766092142f47e1a0f2f9c00N.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "fbf158cad766092142f47e1a0f2f9c00N.exe" /f

Network

Country Destination Domain Proto
RU 80.66.75.114:80 80.66.75.114 tcp

Files

memory/844-1-0x0000000000610000-0x0000000000710000-memory.dmp

memory/844-2-0x0000000000400000-0x000000000042F000-memory.dmp

memory/844-3-0x0000000000400000-0x000000000044C000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\M7H6XY0V\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/844-9-0x0000000000610000-0x0000000000710000-memory.dmp

memory/844-11-0x0000000000400000-0x000000000042F000-memory.dmp

memory/844-12-0x0000000000400000-0x000000000044C000-memory.dmp

memory/844-23-0x0000000000610000-0x0000000000710000-memory.dmp

memory/844-22-0x0000000000400000-0x000000000042F000-memory.dmp

memory/844-21-0x0000000000400000-0x000000000044C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 12:33

Reported

2024-08-31 12:35

Platform

win10v2004-20240802-en

Max time kernel

102s

Max time network

102s

Command Line

"C:\Users\Admin\AppData\Local\Temp\fbf158cad766092142f47e1a0f2f9c00N.exe"

Signatures

GCleaner

loader gcleaner

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\fbf158cad766092142f47e1a0f2f9c00N.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\fbf158cad766092142f47e1a0f2f9c00N.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\fbf158cad766092142f47e1a0f2f9c00N.exe

"C:\Users\Admin\AppData\Local\Temp\fbf158cad766092142f47e1a0f2f9c00N.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "fbf158cad766092142f47e1a0f2f9c00N.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\fbf158cad766092142f47e1a0f2f9c00N.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4612 -ip 4612

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "fbf158cad766092142f47e1a0f2f9c00N.exe" /f

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4612 -s 1484

Network

Country Destination Domain Proto
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
RU 80.66.75.114:80 80.66.75.114 tcp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 114.75.66.80.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 24.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.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

Files

memory/4612-1-0x0000000000740000-0x0000000000840000-memory.dmp

memory/4612-2-0x0000000000560000-0x000000000058D000-memory.dmp

memory/4612-3-0x0000000000400000-0x000000000042F000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\LI43KEDR\download[1].htm

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/4612-9-0x0000000000400000-0x000000000044C000-memory.dmp

memory/4612-10-0x0000000000740000-0x0000000000840000-memory.dmp

memory/4612-12-0x0000000000560000-0x000000000058D000-memory.dmp

memory/4612-13-0x0000000000400000-0x000000000042F000-memory.dmp

memory/4612-21-0x0000000000400000-0x000000000044C000-memory.dmp

memory/4612-22-0x0000000000400000-0x000000000042F000-memory.dmp