Malware Analysis Report

2024-12-07 16:44

Sample ID 241113-3x3jka1hnr
Target 820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe
SHA256 820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513c
Tags
upx defense_evasion discovery persistence
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

820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513c

Threat Level: Shows suspicious behavior

The file 820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe was found to be: Shows suspicious behavior.

Malicious Activity Summary

upx defense_evasion discovery persistence

Loads dropped DLL

Checks computer location settings

Deletes itself

Executes dropped EXE

Adds Run key to start application

Indicator Removal: File Deletion

UPX packed file

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-13 23:54

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 23:54

Reported

2024-11-13 23:56

Platform

win7-20241010-en

Max time kernel

31s

Max time network

25s

Command Line

"C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.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:\ProgramData\Update\wuauclt.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Run\Window Update = "\"C:\\ProgramData\\Update\\wuauclt.exe\" /run" C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.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
N/A N/A N/A N/A
N/A N/A N/A 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:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\ProgramData\Update\wuauclt.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe

"C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe"

C:\ProgramData\Update\wuauclt.exe

"C:\ProgramData\Update\wuauclt.exe" /run

C:\windows\SysWOW64\cmd.exe

"C:\windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe" >> NUL

Network

Country Destination Domain Proto
CA 158.69.115.115:443 tcp

Files

memory/2580-0-0x00000000000D0000-0x00000000000F8000-memory.dmp

memory/2580-4-0x0000000000080000-0x00000000000A8000-memory.dmp

\ProgramData\Update\wuauclt.exe

MD5 d67b9e5b8656504db8ecb4c4c18a6609
SHA1 ece0cc127cbd4b23268602842ef2cf0b406aa8a1
SHA256 78f78a7b6b1570b9c2e16feb0dfb6fc88740580e6ddc267999e00de1f368563d
SHA512 fe9bb3b03cd586d6674cd9626410dfd05dc923659b1e4d65df6bad9310e28bd68da90e7f59521255ed36004c0bd2ed697d43951bf6d1dad27c5d988d66bed589

memory/2580-7-0x00000000000D0000-0x00000000000F8000-memory.dmp

memory/2904-8-0x00000000003F0000-0x0000000000418000-memory.dmp

memory/2580-9-0x00000000000D0000-0x00000000000F8000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-11-13 23:54

Reported

2024-11-13 23:56

Platform

win10v2004-20241007-en

Max time kernel

95s

Max time network

97s

Command Line

"C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe"

Signatures

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-3442511616-637977696-3186306149-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\ProgramData\Update\wuauclt.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Window Update = "\"C:\\ProgramData\\Update\\wuauclt.exe\" /run" C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.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
N/A N/A N/A N/A
N/A N/A N/A 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\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\ProgramData\Update\wuauclt.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\windows\SysWOW64\cmd.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe

"C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe"

C:\ProgramData\Update\wuauclt.exe

"C:\ProgramData\Update\wuauclt.exe" /run

C:\windows\SysWOW64\cmd.exe

"C:\windows\system32\cmd.exe" /c del /q "C:\Users\Admin\AppData\Local\Temp\820fcad3d970954972fcaf48d71d0bd158d08a1c82f97613fd2eace760e3513cN.exe" >> NUL

Network

Country Destination Domain Proto
CA 158.69.115.115:443 tcp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 76.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 53.210.109.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/4748-0-0x0000000000AB0000-0x0000000000AD8000-memory.dmp

C:\ProgramData\Update\wuauclt.exe

MD5 39d1a84ea413c8aa865f41b07a25b7c2
SHA1 7f96dab3cf8a36465428fc2dd0e5fcc04e7ede99
SHA256 6836d0636bcbc50d23e789cf4decc0c6f665a1af3131e96af889286485a7160c
SHA512 557c2b14a459b136e85fe4d20f6e258f0e485b4a3cb155902ce723e8dd579ab39920ba7f9576a46a123e43ee9207c698c91a8363a830d848aefe6b14bdb10fb5

memory/4236-4-0x0000000000B90000-0x0000000000BB8000-memory.dmp

memory/4748-6-0x0000000000AB0000-0x0000000000AD8000-memory.dmp

memory/4236-7-0x0000000000B90000-0x0000000000BB8000-memory.dmp

memory/4748-8-0x0000000000AB0000-0x0000000000AD8000-memory.dmp