Malware Analysis Report

2024-08-06 12:38

Sample ID 240623-ry4bpsyalr
Target build.exe
SHA256 ad9236ff62a5f2e49b8a5d989418351782280ab58a7ef56e5a747aecd5c1bbba
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

ad9236ff62a5f2e49b8a5d989418351782280ab58a7ef56e5a747aecd5c1bbba

Threat Level: Known bad

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

Malicious Activity Summary

stealerium stealer

Stealerium family

Stealerium

Checks computer location settings

Legitimate hosting services abused for malware hosting/C2

Unsigned PE

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Delays execution with timeout.exe

Kills process with taskkill

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
Query Registry
T1012
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

2024-06-23 14:37

Signatures

Stealerium family

stealerium

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-23 14:36

Reported

2024-06-23 14:39

Platform

win10v2004-20240508-en

Max time kernel

147s

Max time network

150s

Command Line

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

Signatures

Stealerium

stealer stealerium

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\build.exe N/A

Legitimate hosting services abused for malware hosting/C2

Description Indicator Process Target
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

Suspicious behavior: EnumeratesProcesses

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

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4328 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 4328 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 4328 wrote to memory of 2404 N/A C:\Users\Admin\AppData\Local\Temp\build.exe C:\Windows\SysWOW64\cmd.exe
PID 2404 wrote to memory of 3648 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2404 wrote to memory of 3648 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2404 wrote to memory of 3648 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 2404 wrote to memory of 3220 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2404 wrote to memory of 3220 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2404 wrote to memory of 3220 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 2404 wrote to memory of 2008 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2404 wrote to memory of 2008 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 2404 wrote to memory of 2008 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp920E.tmp.bat

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\taskkill.exe

TaskKill /F /IM 4328

C:\Windows\SysWOW64\timeout.exe

Timeout /T 2 /Nobreak

Network

Country Destination Domain Proto
US 8.8.8.8:53 discord.com udp

Files

memory/4328-0-0x0000000074A5E000-0x0000000074A5F000-memory.dmp

memory/4328-1-0x0000000000440000-0x00000000005D2000-memory.dmp

memory/4328-2-0x0000000004F80000-0x0000000004FE6000-memory.dmp

memory/4328-3-0x0000000074A50000-0x0000000075200000-memory.dmp

memory/4328-6-0x00000000054F0000-0x0000000005582000-memory.dmp

memory/4328-8-0x00000000055B0000-0x00000000055B8000-memory.dmp

memory/4328-7-0x0000000005580000-0x00000000055A6000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp920E.tmp.bat

MD5 fccc2d7e54ef6d8d21898f20688371d8
SHA1 d5d698f5a0a31f1ca9ac67e944be8dcf7ed266eb
SHA256 16120b847aa0a9e8eee8ea8c056984a34b0d81d0796b9f51c73f998de1ffa883
SHA512 11bfe2bac49caf489145fec3750f59b8dcfe8631790280db34697c7bcaf706cadf147472f5fb3b0a9a405a4927a4af91c90045f3aaea973f415f2eb665facc7e

memory/4328-13-0x0000000074A50000-0x0000000075200000-memory.dmp