Malware Analysis Report

2024-12-07 16:50

Sample ID 241113-esjnwswerq
Target f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c
SHA256 f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c
Tags
upx defense_evasion discovery
score
7/10

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
7/10

SHA256

f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c

Threat Level: Shows suspicious behavior

The file f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c was found to be: Shows suspicious behavior.

Malicious Activity Summary

upx defense_evasion discovery

Deletes itself

Checks computer location settings

Executes dropped EXE

Indicator Removal: File Deletion

UPX packed file

Drops file in Windows directory

Unsigned PE

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Checks processor information in registry

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 04:12

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 04:12

Reported

2024-11-13 04:14

Platform

win7-20241010-en

Max time kernel

141s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe"

Signatures

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\zskhost.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\zskhost.exe C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe N/A
File opened for modification C:\Windows\Debug\zskhost.exe C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.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\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\zskhost.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\zskhost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\zskhost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe

"C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe"

C:\Windows\Debug\zskhost.exe

C:\Windows\Debug\zskhost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\F43358~1.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 l2xz04Kftq.nnnn.eu.org udp
US 8.8.8.8:53 Li8m2nmd4.nnnn.eu.org udp
US 8.8.8.8:53 vPpL30HuNI.nnnn.eu.org udp

Files

memory/1304-0-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\debug\zskhost.exe

MD5 f80959aadce7414ba415ce79790289d0
SHA1 a71a1dbad49fcb4a9b65f98a2f15c67b8ac3f5ae
SHA256 ed013b3fa5f69de301072cc426adf49d370667acd71732a2b0f53f741cd64e5d
SHA512 5256a4d6a84390fa2fddab33a340849d4240ac2cc50f4a045a798c7f63cbdc18db493ce815d5112663eed807c259f4ab68a05f3f318b32658f4539c8c21830be

memory/1304-4-0x0000000000400000-0x000000000040F000-memory.dmp

memory/1612-5-0x0000000000400000-0x000000000040F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-13 04:12

Reported

2024-11-13 04:14

Platform

win10v2004-20241007-en

Max time kernel

141s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe"

Signatures

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\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Windows\Debug\dcihost.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\dcihost.exe C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe N/A
File opened for modification C:\Windows\Debug\dcihost.exe C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.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\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\Debug\dcihost.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\dcihost.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz C:\Windows\Debug\dcihost.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeIncBasePriorityPrivilege N/A C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe

"C:\Users\Admin\AppData\Local\Temp\f433583b8b05b7435a7035edf72dfdc47570b35183aed304abc69b4bab3d4b1c.exe"

C:\Windows\Debug\dcihost.exe

C:\Windows\Debug\dcihost.exe

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\F43358~1.EXE > nul

Network

Country Destination Domain Proto
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
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 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 96.46.235.103.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 l2xz04Kftq.nnnn.eu.org udp
US 8.8.8.8:53 Li8m2nmd4.nnnn.eu.org udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 vPpL30HuNI.nnnn.eu.org udp

Files

memory/3932-0-0x0000000000400000-0x000000000040F000-memory.dmp

C:\Windows\debug\dcihost.exe

MD5 f80959aadce7414ba415ce79790289d0
SHA1 a71a1dbad49fcb4a9b65f98a2f15c67b8ac3f5ae
SHA256 ed013b3fa5f69de301072cc426adf49d370667acd71732a2b0f53f741cd64e5d
SHA512 5256a4d6a84390fa2fddab33a340849d4240ac2cc50f4a045a798c7f63cbdc18db493ce815d5112663eed807c259f4ab68a05f3f318b32658f4539c8c21830be

memory/3932-5-0x0000000000400000-0x000000000040F000-memory.dmp

memory/4528-6-0x0000000000400000-0x000000000040F000-memory.dmp