Malware Analysis Report

2024-12-07 16:23

Sample ID 241113-zsfx8aykby
Target 2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N
SHA256 2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8
Tags
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

2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8

Threat Level: Likely malicious

The file 2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N was found to be: Likely malicious.

Malicious Activity Summary

defense_evasion discovery evasion

Sets file to hidden

Deletes itself

Checks computer location settings

Executes dropped EXE

Indicator Removal: File Deletion

Drops file in Windows directory

Unsigned PE

System Location Discovery: System Language Discovery

Enumerates physical storage devices

Views/modifies file attributes

Checks processor information in registry

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 20:58

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-13 20:58

Reported

2024-11-13 21:00

Platform

win7-20240903-en

Max time kernel

110s

Max time network

98s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.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

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\rwmhost.exe C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.exe N/A
File opened for modification C:\Windows\Debug\rwmhost.exe C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.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:\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
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.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\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.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\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.exe

"C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.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\2AB464~1.EXE > nul

Network

Country Destination Domain Proto
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 b94ptZM6p.nnnn.eu.org udp
US 8.8.8.8:53 pl0SN3UJX.nnnn.eu.org udp

Files

memory/2692-0-0x0000000000400000-0x0000000000410000-memory.dmp

C:\Windows\Debug\rwmhost.exe

MD5 eaf7f8250be27fdeb00dcc294aff34f7
SHA1 2b291150522c08f863a6fac75fadfc9163d29ca9
SHA256 134146689a72e5d2cbc8ee76740bf2943d44dae2c1a880346d5119faf76378ee
SHA512 64e133084574cb417a58a82d77545089eb5fa4372ce891a0d6811b74ebf3d87882f0f40be007624d6a577fbc929095868fe5d55686e53c2a725795fba0b90504

memory/2716-5-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2692-6-0x0000000000400000-0x0000000000410000-memory.dmp

memory/2716-7-0x0000000000400000-0x0000000000410000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-13 20:58

Reported

2024-11-13 21:00

Platform

win10v2004-20241007-en

Max time kernel

111s

Max time network

101s

Command Line

"C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.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\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.exe N/A

Executes dropped EXE

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

Indicator Removal: File Deletion

defense_evasion

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\Debug\nkmhost.exe C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.exe N/A
File opened for modification C:\Windows\Debug\nkmhost.exe C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.exe N/A
File opened for modification C:\Windows\Debug\nkmhost.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\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\nkmhost.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\nkmhost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\nkmhost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.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\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.exe

"C:\Users\Admin\AppData\Local\Temp\2ab46467d09aba5f79490a86175c0ea43085956e86c22f54f65c18dce2c7fdd8N.exe"

C:\Windows\SysWOW64\attrib.exe

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

C:\Windows\Debug\nkmhost.exe

C:\Windows\Debug\nkmhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\2AB464~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.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 68.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 188.47.235.103.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 106.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 b94ptZM6p.nnnn.eu.org udp
US 8.8.8.8:53 pl0SN3UJX.nnnn.eu.org udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 102.144.22.2.in-addr.arpa udp

Files

memory/756-0-0x0000000000400000-0x0000000000410000-memory.dmp

C:\Windows\debug\nkmhost.exe

MD5 af793af544bec0b7d7025d6f84bb43d2
SHA1 97df347fca6d8b6d10fe2e79ddca0501d8c7e98f
SHA256 f9ad276142cbb7cb5ec7579e4622c51aeb3921fe812f3447c44757fd76368c72
SHA512 846eacd27b25e0fb80749615661d22409e9fecb9d73379f59d19167dde2b92d28cf7e0ce37262ca904ab5846d536d3ad51dd8e0feab61b21e476aa225174448b

memory/756-5-0x0000000000400000-0x0000000000410000-memory.dmp

memory/4896-6-0x0000000000400000-0x0000000000410000-memory.dmp