Malware Analysis Report

2025-01-02 09:40

Sample ID 240903-xgmkhstekm
Target 51b7a152276e9e1d566806f7cc17be50N.exe
SHA256 f881f3ca74a2f3a25fbbb77a8208296c5bb0e9305c22752235234ef5f71e324f
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

f881f3ca74a2f3a25fbbb77a8208296c5bb0e9305c22752235234ef5f71e324f

Threat Level: Known bad

The file 51b7a152276e9e1d566806f7cc17be50N.exe was found to be: Known bad.

Malicious Activity Summary

gcleaner discovery loader

GCleaner

Downloads MZ/PE file

Loads dropped DLL

Deletes itself

Checks computer location settings

Program crash

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-03 18:49

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-03 18:49

Reported

2024-09-03 18:51

Platform

win7-20240903-en

Max time kernel

32s

Max time network

37s

Command Line

"C:\Users\Admin\AppData\Local\Temp\51b7a152276e9e1d566806f7cc17be50N.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\51b7a152276e9e1d566806f7cc17be50N.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\51b7a152276e9e1d566806f7cc17be50N.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\51b7a152276e9e1d566806f7cc17be50N.exe

"C:\Users\Admin\AppData\Local\Temp\51b7a152276e9e1d566806f7cc17be50N.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "51b7a152276e9e1d566806f7cc17be50N.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\51b7a152276e9e1d566806f7cc17be50N.exe" & exit

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "51b7a152276e9e1d566806f7cc17be50N.exe" /f

Network

Country Destination Domain Proto
RU 80.66.75.114:80 80.66.75.114 tcp

Files

memory/1756-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

memory/1756-2-0x0000000000220000-0x000000000025C000-memory.dmp

memory/1756-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/1756-8-0x0000000010000000-0x000000001001C000-memory.dmp

memory/1756-13-0x00000000005C0000-0x00000000006C0000-memory.dmp

memory/1756-15-0x0000000000220000-0x000000000025C000-memory.dmp

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

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/1756-17-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1756-18-0x0000000000400000-0x000000000043F000-memory.dmp

memory/1756-31-0x0000000000400000-0x0000000000453000-memory.dmp

\Users\Admin\AppData\Local\Temp\iPNxp9joKWkPfS\Y-Cleaner.exe

MD5 a8cf5621811f7fac55cfe8cb3fa6b9f6
SHA1 121356839e8138a03141f5f5856936a85bd2a474
SHA256 614a0362ab87cee48d0935b5bb957d539be1d94c6fdeb3fe42fac4fbe182c10c
SHA512 4479d951435f222ca7306774002f030972c9f1715d6aaf512fca9420dd79cb6d08240f80129f213851773290254be34f0ff63c7b1f4d554a7db5f84b69e84bdd

memory/1756-36-0x0000000000400000-0x0000000000453000-memory.dmp

memory/1756-38-0x0000000000400000-0x000000000043F000-memory.dmp

memory/1756-37-0x00000000005C0000-0x00000000006C0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-03 18:49

Reported

2024-09-03 18:51

Platform

win10v2004-20240802-en

Max time kernel

96s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\51b7a152276e9e1d566806f7cc17be50N.exe"

Signatures

GCleaner

loader gcleaner

Downloads MZ/PE file

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-4182098368-2521458979-3782681353-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\51b7a152276e9e1d566806f7cc17be50N.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\51b7a152276e9e1d566806f7cc17be50N.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\51b7a152276e9e1d566806f7cc17be50N.exe

"C:\Users\Admin\AppData\Local\Temp\51b7a152276e9e1d566806f7cc17be50N.exe"

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /c taskkill /im "51b7a152276e9e1d566806f7cc17be50N.exe" /f & erase "C:\Users\Admin\AppData\Local\Temp\51b7a152276e9e1d566806f7cc17be50N.exe" & exit

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4876 -ip 4876

C:\Windows\SysWOW64\taskkill.exe

taskkill /im "51b7a152276e9e1d566806f7cc17be50N.exe" /f

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4876 -s 1284

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.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 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 107.12.20.2.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/4876-1-0x00000000004F0000-0x00000000005F0000-memory.dmp

memory/4876-2-0x00000000007C0000-0x00000000007FC000-memory.dmp

memory/4876-3-0x0000000000400000-0x000000000043F000-memory.dmp

memory/4876-8-0x0000000010000000-0x000000001001C000-memory.dmp

memory/4876-13-0x00000000004F0000-0x00000000005F0000-memory.dmp

memory/4876-15-0x0000000000400000-0x0000000000453000-memory.dmp

memory/4876-16-0x00000000007C0000-0x00000000007FC000-memory.dmp

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

MD5 cfcd208495d565ef66e7dff9f98764da
SHA1 b6589fc6ab0dc82cf12099d1c2d40ab994e8410c
SHA256 5feceb66ffc86f38d952786c6d696c79c2dbc239dd4e91b46729d73a27fb57e9
SHA512 31bca02094eb78126a517b206a88c73cfa9ec6f704c7030d18212cace820f025f00bf0ea68dbf3f3a5436ca63b53bf7bf80ad8d5de7d8359d0b7fed9dbc3ab99

memory/4876-18-0x0000000000400000-0x000000000043F000-memory.dmp

memory/4876-27-0x0000000000400000-0x0000000000453000-memory.dmp

memory/4876-35-0x0000000000400000-0x0000000000453000-memory.dmp

memory/4876-36-0x0000000000400000-0x000000000043F000-memory.dmp