Malware Analysis Report

2024-08-06 12:39

Sample ID 240629-thw9katerp
Target stub.exe
SHA256 d909f5519de499c7329a54e007ec94cf45d304e9fb17daaf7ee3cdf43675691c
Tags
stealerium stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

d909f5519de499c7329a54e007ec94cf45d304e9fb17daaf7ee3cdf43675691c

Threat Level: Known bad

The file stub.exe was found to be: Known bad.

Malicious Activity Summary

stealerium stealer

Stealerium family

Stealerium

Legitimate hosting services abused for malware hosting/C2

Unsigned PE

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Delays execution with timeout.exe

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

Suspicious use of WriteProcessMemory

Modifies registry class

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Web Service
T1102
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-29 16:04

Signatures

Stealerium family

stealerium

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-29 16:04

Reported

2024-06-29 16:49

Platform

win11-20240611-en

Max time kernel

1477s

Max time network

2617s

Command Line

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

Signatures

Stealerium

stealer stealerium

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
N/A discord.com N/A N/A
N/A discord.com N/A N/A

Enumerates physical storage devices

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\timeout.exe N/A

Kills process with taskkill

evasion
Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\taskkill.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1560405787-796225086-678739705-1000_Classes\Local Settings\MuiCache C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe N/A

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\stub.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\taskkill.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2948 wrote to memory of 4996 N/A C:\Users\Admin\AppData\Local\Temp\stub.exe C:\Windows\SysWOW64\cmd.exe
PID 2948 wrote to memory of 4996 N/A C:\Users\Admin\AppData\Local\Temp\stub.exe C:\Windows\SysWOW64\cmd.exe
PID 2948 wrote to memory of 4996 N/A C:\Users\Admin\AppData\Local\Temp\stub.exe C:\Windows\SysWOW64\cmd.exe
PID 4996 wrote to memory of 2052 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 4996 wrote to memory of 2052 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 4996 wrote to memory of 2052 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 4996 wrote to memory of 4800 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4996 wrote to memory of 4800 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4996 wrote to memory of 4800 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4996 wrote to memory of 3328 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4996 wrote to memory of 3328 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4996 wrote to memory of 3328 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmpB805.tmp.bat

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\taskkill.exe

TaskKill /F /IM 2948

C:\Windows\SysWOW64\timeout.exe

Timeout /T 2 /Nobreak

C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe

"C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca

Network

Country Destination Domain Proto
US 8.8.8.8:53 discord.com udp
US 162.159.137.232:443 discord.com tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

memory/2948-0-0x0000000074C0E000-0x0000000074C0F000-memory.dmp

memory/2948-1-0x0000000000840000-0x00000000009D6000-memory.dmp

memory/2948-2-0x0000000005440000-0x00000000054A6000-memory.dmp

memory/2948-3-0x0000000074C00000-0x00000000753B1000-memory.dmp

memory/2948-7-0x0000000005A90000-0x0000000005B22000-memory.dmp

memory/2948-9-0x0000000005B70000-0x0000000005B78000-memory.dmp

memory/2948-8-0x0000000005B20000-0x0000000005B46000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmpB805.tmp.bat

MD5 69a8726e7291fc5ee256d91699037655
SHA1 bfe3e11c0875cf718c2589f68eb72316bfa2f86b
SHA256 d0bdd98b0078e2ccaaf60bfa60ac3f1eec12eeb5809befd70f148234a1140d73
SHA512 72621e9a3308ca8f04edc806dd7f8ac247ee060ad47f5d4a276f0e4f7ca35cb6e3846e94804450fbdc1f815703d43b8c5e40da6fd9658ea99850f5832288e49a

memory/2948-14-0x0000000074C00000-0x00000000753B1000-memory.dmp

C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

MD5 9a7af7f1f08f7de9da3ba647286ee5a6
SHA1 d7a23961ba5f8c4242a03f20686ff516c2ae432c
SHA256 dddc3d322b46ec53927c26326a4f4d573dec131fbe668450f984c91c3104a08b
SHA512 64b0d94e68aa2d0ee9d02f170de6989f5255c5c57d05dffbf4dbbe012dae43a6f4dbd59c6a85fd2621fb84ae7f4cdf486a089b90e3e6c4fce1b152ba5aa6ba58

C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat

MD5 35745802ec2865acb4c60e651e5a8620
SHA1 f10c746a71c2741790aa3f5160ea7d9be1a1920a
SHA256 ef386e977e9fcfc811f2710d0d630e23e2278cf9811770da0c2f10f3965b7a63
SHA512 0031f739cafa1089dc655a3509bc215fc900c20734507a1b0b69f1ad1567fb2fe4af725360cf952a4689e89973bbd59a53ea6ff8bd6c4c67b9e732f66f14a42f