Malware Analysis Report

2025-08-10 22:52

Sample ID 240107-x188maccek
Target 497d07be55c7691971ef55c818214601.exe
SHA256 8c91fcab97a80bc4331131ac99bfc9dc2debe1dde4f5525f7b170fda02f2a7e5
Tags
persistence
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

8c91fcab97a80bc4331131ac99bfc9dc2debe1dde4f5525f7b170fda02f2a7e5

Threat Level: Known bad

The file 497d07be55c7691971ef55c818214601.exe was found to be: Known bad.

Malicious Activity Summary

persistence

Adds autorun key to be loaded by Explorer.exe on startup

Loads dropped DLL

Deletes itself

Drops file in System32 directory

Unsigned PE

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Modifies registry class

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-01-07 19:20

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-01-07 19:20

Reported

2024-01-07 19:22

Platform

win7-20231215-en

Max time kernel

119s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe"

Signatures

Adds autorun key to be loaded by Explorer.exe on startup

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\lweurqhx.dll = "{71A78CD4-E470-4a18-8457-E0E0283DD507}" C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A

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\497d07be55c7691971ef55c818214601.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\lweurqhx.tmp C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
File opened for modification C:\Windows\SysWOW64\lweurqhx.tmp C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
File opened for modification C:\Windows\SysWOW64\lweurqhx.nls C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A

Modifies registry class

Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ThreadingModel = "Apartment" C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507} C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32 C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ = "C:\\Windows\\SysWow64\\lweurqhx.dll" C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe

"C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe"

C:\Windows\SysWOW64\cmd.exe

cmd /c C:\Users\Admin\AppData\Local\Temp\9DC5.tmp.bat

Network

N/A

Files

C:\Windows\SysWOW64\lweurqhx.tmp

MD5 d41d8cd98f00b204e9800998ecf8427e
SHA1 da39a3ee5e6b4b0d3255bfef95601890afd80709
SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
SHA512 cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

C:\Windows\SysWOW64\lweurqhx.nls

MD5 b002bc9852c2dfb2103f25c632d0519f
SHA1 684e5464c61d02c4dac8b5d1849fb688a288a675
SHA256 7bbc8fb18996628f01b355f28571159e9155d57dfd48ee039b0924e019990497
SHA512 64b7aa8aa735fe142f68610a1c154992d59b67b2ffc936a552467d28cfb29c1d49139852b7b540cbfa39e041c9be1bc73d7b929aeed9f7c9d691687bd42d5956

memory/2528-16-0x0000000020000000-0x0000000020009000-memory.dmp

memory/2528-25-0x0000000020000000-0x0000000020009000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-01-07 19:20

Reported

2024-01-07 19:23

Platform

win10v2004-20231215-en

Max time kernel

140s

Max time network

147s

Command Line

"C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe"

Signatures

Adds autorun key to be loaded by Explorer.exe on startup

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\lweurqhx.dll = "{71A78CD4-E470-4a18-8457-E0E0283DD507}" C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\lweurqhx.nls C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
File created C:\Windows\SysWOW64\lweurqhx.tmp C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
File opened for modification C:\Windows\SysWOW64\lweurqhx.tmp C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507} C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32 C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ = "C:\\Windows\\SysWow64\\lweurqhx.dll" C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71A78CD4-E470-4a18-8457-E0E0283DD507}\InProcServer32\ThreadingModel = "Apartment" C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe

"C:\Users\Admin\AppData\Local\Temp\497d07be55c7691971ef55c818214601.exe"

C:\Windows\SysWOW64\cmd.exe

C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\C5F0.tmp.bat

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 82.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 64.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 138.91.171.81:80 tcp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 63.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 58.99.105.20.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 178.223.142.52.in-addr.arpa udp

Files

C:\Windows\SysWOW64\lweurqhx.nls

MD5 b002bc9852c2dfb2103f25c632d0519f
SHA1 684e5464c61d02c4dac8b5d1849fb688a288a675
SHA256 7bbc8fb18996628f01b355f28571159e9155d57dfd48ee039b0924e019990497
SHA512 64b7aa8aa735fe142f68610a1c154992d59b67b2ffc936a552467d28cfb29c1d49139852b7b540cbfa39e041c9be1bc73d7b929aeed9f7c9d691687bd42d5956

C:\Windows\SysWOW64\lweurqhx.dll

MD5 2e2e7c8edc157b8f743b101c5f297aee
SHA1 da26c1ecc164a6d5926eff1ca60e98a38852f9ee
SHA256 bc6956550d3bfcf5e5fbfb4ad1f2cfbd94b5adcdb8014b6c857ac3f65e27559a
SHA512 958558c6c13417d6c9b0f82cd77c58e659299b1d608b9c635edad71f052e04049a900080fb783e93c94ea21d68fb7566584c271fdc07f6b86597ebb831b5761e

C:\Windows\SysWOW64\lweurqhx.tmp

MD5 21e3eddfe73b682e779b4f9d030e720c
SHA1 bfa46e5c3852b07e7ecf6aa9006377c2e6adb181
SHA256 0ebf803d1770b541986b5dc231f17d33111190e0ac1cea7c17dbd564bf04ddc2
SHA512 bc6ba85122334e0010cd713af9cdfd7003fbd7e888b8df8490e6b5a56edcdf9118c37c83b8cce0fc028a3c264ad085b6713b4887a71974d7dad38a231d5744a1

memory/3204-17-0x0000000020000000-0x0000000020009000-memory.dmp

memory/3204-21-0x0000000020000000-0x0000000020009000-memory.dmp