Malware Analysis Report

2025-03-14 23:27

Sample ID 240407-wvzlkaag2z
Target 052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089
SHA256 052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089
Tags
persistence
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

052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089

Threat Level: Likely malicious

The file 052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089 was found to be: Likely malicious.

Malicious Activity Summary

persistence

Modifies AppInit DLL entries

Executes dropped EXE

Drops file in Program Files directory

Unsigned PE

Suspicious use of UnmapMainImage

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-04-07 18:15

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-07 18:15

Reported

2024-04-07 18:17

Platform

win7-20240221-en

Max time kernel

117s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089.exe"

Signatures

Modifies AppInit DLL entries

persistence

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\PROGRA~3\Mozilla\xobykzk.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\xobykzk.exe C:\Users\Admin\AppData\Local\Temp\052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089.exe N/A
File created C:\PROGRA~3\Mozilla\yvzxgmj.dll C:\PROGRA~3\Mozilla\xobykzk.exe N/A

Suspicious use of UnmapMainImage

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089.exe N/A
N/A N/A C:\PROGRA~3\Mozilla\xobykzk.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2976 wrote to memory of 2052 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\xobykzk.exe
PID 2976 wrote to memory of 2052 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\xobykzk.exe
PID 2976 wrote to memory of 2052 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\xobykzk.exe
PID 2976 wrote to memory of 2052 N/A C:\Windows\system32\taskeng.exe C:\PROGRA~3\Mozilla\xobykzk.exe

Processes

C:\Users\Admin\AppData\Local\Temp\052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089.exe

"C:\Users\Admin\AppData\Local\Temp\052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089.exe"

C:\Windows\system32\taskeng.exe

taskeng.exe {E78D1E7E-674B-429F-AB9C-3430F23C017E} S-1-5-18:NT AUTHORITY\System:Service:

C:\PROGRA~3\Mozilla\xobykzk.exe

C:\PROGRA~3\Mozilla\xobykzk.exe -clyupje

Network

N/A

Files

memory/3024-0-0x0000000000400000-0x000000000045E000-memory.dmp

memory/3024-1-0x00000000002C0000-0x000000000031B000-memory.dmp

memory/3024-2-0x0000000000400000-0x000000000045B000-memory.dmp

memory/3024-4-0x0000000000400000-0x000000000045B000-memory.dmp

C:\PROGRA~3\Mozilla\xobykzk.exe

MD5 e7d9c85911ddef9c8a6689a2502c1f59
SHA1 49f8fa5f1b72ff76a818a056fad706d4c472b69f
SHA256 13575da0e77a7e764503dcb592b7f4bf42b9f260bae2ce45e0caf43c2eb6d398
SHA512 40a9c8f98a9bef9770933ec8f753fbf367bdf14371b673d5313fb25bf9b724e7807aa70a797b6b4d03cd8c5cdfc406fff29961d3af57a8b0c834a5ec918db134

memory/2052-7-0x0000000000460000-0x00000000004BB000-memory.dmp

memory/2052-8-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2052-10-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2052-11-0x0000000000460000-0x00000000004BB000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-07 18:15

Reported

2024-04-07 18:17

Platform

win10v2004-20240319-en

Max time kernel

147s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089.exe"

Signatures

Modifies AppInit DLL entries

persistence

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\PROGRA~3\Mozilla\jhifwqk.exe N/A

Drops file in Program Files directory

Description Indicator Process Target
File created C:\PROGRA~3\Mozilla\jhifwqk.exe C:\Users\Admin\AppData\Local\Temp\052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089.exe N/A
File created C:\PROGRA~3\Mozilla\biclnte.dll C:\PROGRA~3\Mozilla\jhifwqk.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089.exe

"C:\Users\Admin\AppData\Local\Temp\052afe5a2734aec7ab6c4e3e847f322ff11e7ed63a85baa9b185dbbbb658a089.exe"

C:\PROGRA~3\Mozilla\jhifwqk.exe

C:\PROGRA~3\Mozilla\jhifwqk.exe -zmqutfb

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4168 --field-trial-handle=2288,i,11069632825633797559,14829202121434726371,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 20.231.121.79:80 tcp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 241.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
GB 13.105.221.16:443 tcp
US 8.8.8.8:53 42.56.20.217.in-addr.arpa udp
US 8.8.8.8:53 216.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.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 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 89.65.42.20.in-addr.arpa udp

Files

memory/2076-0-0x0000000000400000-0x000000000045E000-memory.dmp

memory/2076-1-0x0000000002200000-0x000000000225B000-memory.dmp

memory/2076-2-0x0000000000400000-0x000000000045B000-memory.dmp

C:\ProgramData\Mozilla\jhifwqk.exe

MD5 1cdb08de669e583aeaa0c9984dbea2a7
SHA1 3d0d872febba28ca3c1993abac0fcea11a5b654a
SHA256 9d3cbe8c0968542c5bdb855fc98ba204e2cabf625d302d51610c3017e75f9117
SHA512 7660f9d87d18b6bbcb473d9dfdbbc47fd24b3f050933c4fc7b224069f9955ad3e2e44fb1ff1890a7d8e4a35f9d9b6e65b3d5d17606cdab4568079980973bdc81

memory/2076-6-0x0000000000400000-0x000000000045B000-memory.dmp

memory/2076-8-0x0000000002200000-0x000000000225B000-memory.dmp

memory/5032-9-0x0000000000D70000-0x0000000000DCB000-memory.dmp

memory/5032-10-0x0000000000400000-0x000000000045B000-memory.dmp

memory/5032-12-0x0000000000400000-0x000000000045B000-memory.dmp