Malware Analysis Report

2024-12-07 16:23

Sample ID 241113-zb633sskaq
Target 89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe
SHA256 89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f
Tags
upx defense_evasion discovery evasion
score
8/10

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
8/10

SHA256

89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f

Threat Level: Likely malicious

The file 89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe was found to be: Likely malicious.

Malicious Activity Summary

upx defense_evasion discovery evasion

Sets file to hidden

Checks computer location settings

Executes dropped EXE

Deletes itself

Indicator Removal: File Deletion

UPX packed file

Drops file in Windows directory

System Location Discovery: System Language Discovery

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Views/modifies file attributes

Checks processor information in registry

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 20:33

Signatures

UPX packed file

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

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-13 20:33

Reported

2024-11-13 20:35

Platform

win7-20240903-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe"

Signatures

Sets file to hidden

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Deletes itself

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\cmd.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\rwmhost.exe N/A

Indicator Removal: File Deletion

defense_evasion

UPX packed file

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

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\rwmhost.exe C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe N/A
File opened for modification C:\Windows\Debug\rwmhost.exe C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe N/A
File opened for modification C:\Windows\Debug\rwmhost.exe C:\Windows\SysWOW64\attrib.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\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\attrib.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\rwmhost.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\Debug\rwmhost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\rwmhost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe

"C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\rwmhost.exe

C:\Windows\Debug\rwmhost.exe

C:\Windows\Debug\rwmhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\89151C~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.baidu.com udp
HK 103.235.46.96:80 www.baidu.com tcp
US 8.8.8.8:53 Y9x3nwwa11.nnnn.eu.org udp
US 8.8.8.8:53 7p8FYQQikF.nnnn.eu.org udp

Files

memory/2980-0-0x0000000000400000-0x0000000000426000-memory.dmp

C:\Windows\Debug\rwmhost.exe

MD5 f441cc684b8a0c60591098a5925446a9
SHA1 1dbd8e9260e4432d192d53a0716f8e65afd4366f
SHA256 b9172f1fa5d884f612991881959f4843801465f2dada71593bd0aff376950252
SHA512 7f8637f4b799d070fe80f52bdd9a0c920f728c7fad398e51da56b576703332ad74a542faa08960d33e8d27c1114c0675f2ab0bc59beb5363ee99ec6d53806f78

memory/2980-5-0x0000000000400000-0x0000000000426000-memory.dmp

memory/1956-6-0x0000000000400000-0x0000000000426000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-13 20:33

Reported

2024-11-13 20:35

Platform

win10v2004-20241007-en

Max time kernel

111s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe"

Signatures

Sets file to hidden

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\mewhost.exe N/A

Indicator Removal: File Deletion

defense_evasion

UPX packed file

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

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\mewhost.exe C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe N/A
File opened for modification C:\Windows\Debug\mewhost.exe C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe N/A
File opened for modification C:\Windows\Debug\mewhost.exe C:\Windows\SysWOW64\attrib.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\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\mewhost.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\attrib.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\cmd.exe N/A

Checks processor information in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0 C:\Windows\Debug\mewhost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\mewhost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe N/A

Views/modifies file attributes

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\attrib.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe

"C:\Users\Admin\AppData\Local\Temp\89151cd457e0d98eab204a829e2637757d23935b9dba42cdcb0bfa46ebe57b2f.exe"

C:\Windows\SysWOW64\attrib.exe

attrib +a +s +h +r C:\Windows\Debug\mewhost.exe

C:\Windows\Debug\mewhost.exe

C:\Windows\Debug\mewhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\89151C~1.EXE > nul

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 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 www.baidu.com udp
HK 103.235.47.188:80 www.baidu.com tcp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 188.47.235.103.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 102.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 Y9x3nwwa11.nnnn.eu.org udp
US 8.8.8.8:53 7p8FYQQikF.nnnn.eu.org udp
US 8.8.8.8:53 21.236.111.52.in-addr.arpa udp

Files

memory/4980-0-0x0000000000400000-0x0000000000426000-memory.dmp

C:\Windows\debug\mewhost.exe

MD5 f441cc684b8a0c60591098a5925446a9
SHA1 1dbd8e9260e4432d192d53a0716f8e65afd4366f
SHA256 b9172f1fa5d884f612991881959f4843801465f2dada71593bd0aff376950252
SHA512 7f8637f4b799d070fe80f52bdd9a0c920f728c7fad398e51da56b576703332ad74a542faa08960d33e8d27c1114c0675f2ab0bc59beb5363ee99ec6d53806f78

memory/4980-5-0x0000000000400000-0x0000000000426000-memory.dmp

memory/3428-6-0x0000000000400000-0x0000000000426000-memory.dmp