Malware Analysis Report

2024-08-06 12:42

Sample ID 240528-svjnkabd22
Target Stealerium.zip
SHA256 49d8c623abc37dff7af7d7ea15fa66b27504f166b5bf7a2d486c41ce7923a722
Tags
stealerium stealer
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral7

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral3

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral5

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral4

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral6

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral8

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral9

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral10

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

49d8c623abc37dff7af7d7ea15fa66b27504f166b5bf7a2d486c41ce7923a722

Threat Level: Known bad

The file Stealerium.zip was found to be: Known bad.

Malicious Activity Summary

stealerium stealer

Stealerium

Stealerium family

Unsigned PE

Enumerates physical storage devices

Delays execution with timeout.exe

Kills process with taskkill

Suspicious use of AdjustPrivilegeToken

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
System Information Discovery
T1082
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-05-28 15:26

Signatures

Stealerium family

stealerium

Unsigned PE

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
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

Analysis: behavioral7

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:29

Platform

win11-20240508-en

Max time kernel

92s

Max time network

99s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\SixLabors.ImageSharp.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\SixLabors.ImageSharp.dll,#1

Network

Country Destination Domain Proto
US 52.111.227.14:443 tcp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:29

Platform

win11-20240426-en

Max time kernel

147s

Max time network

150s

Command Line

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

Signatures

N/A

Processes

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

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

Network

Country Destination Domain Proto
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:28

Platform

win11-20240508-en

Max time kernel

54s

Max time network

72s

Command Line

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

Signatures

N/A

Processes

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

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

Network

Country Destination Domain Proto
GB 2.16.34.98:443 tcp
US 8.8.8.8:53 browser.pipe.aria.microsoft.com udp
US 20.189.173.8:443 browser.pipe.aria.microsoft.com tcp
NL 23.62.61.154:443 r.bing.com tcp
NL 23.62.61.154:443 r.bing.com tcp
NL 23.62.61.154:443 r.bing.com tcp
NL 23.62.61.154:443 r.bing.com tcp
NL 23.62.61.154:443 r.bing.com tcp
NL 23.62.61.154:443 r.bing.com tcp
US 8.8.8.8:53 25.24.18.2.in-addr.arpa udp
US 8.8.8.8:53 8.173.189.20.in-addr.arpa udp

Files

memory/3968-0-0x00007FFF7DCFB000-0x00007FFF7DCFC000-memory.dmp

memory/3968-1-0x00007FFF7DCFB000-0x00007FFF7DCFC000-memory.dmp

Analysis: behavioral3

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:29

Platform

win11-20240508-en

Max time kernel

146s

Max time network

149s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Mono.Cecil.Mdb.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Mono.Cecil.Mdb.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

N/A

Analysis: behavioral5

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:29

Platform

win11-20240426-en

Max time kernel

92s

Max time network

94s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Mono.Cecil.Rocks.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Mono.Cecil.Rocks.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

N/A

Analysis: behavioral4

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:29

Platform

win11-20240508-en

Max time kernel

89s

Max time network

98s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Mono.Cecil.Pdb.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Mono.Cecil.Pdb.dll,#1

Network

Files

N/A

Analysis: behavioral6

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:29

Platform

win11-20240508-en

Max time kernel

146s

Max time network

150s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Mono.Cecil.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Mono.Cecil.dll,#1

Network

Files

N/A

Analysis: behavioral8

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:29

Platform

win11-20240426-en

Max time kernel

90s

Max time network

94s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Spectre.Console.ImageSharp.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Spectre.Console.ImageSharp.dll,#1

Network

Files

N/A

Analysis: behavioral9

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:29

Platform

win11-20240426-en

Max time kernel

93s

Max time network

94s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Spectre.Console.dll,#1

Signatures

N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\Spectre.Console.dll,#1

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp

Files

N/A

Analysis: behavioral10

Detonation Overview

Submitted

2024-05-28 15:26

Reported

2024-05-28 15:29

Platform

win11-20240426-en

Max time kernel

90s

Max time network

99s

Command Line

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

Signatures

Stealerium

stealer stealerium

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 use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4616 wrote to memory of 4104 N/A C:\Users\Admin\AppData\Local\Temp\Stub\stub.exe C:\Windows\SysWOW64\cmd.exe
PID 4616 wrote to memory of 4104 N/A C:\Users\Admin\AppData\Local\Temp\Stub\stub.exe C:\Windows\SysWOW64\cmd.exe
PID 4616 wrote to memory of 4104 N/A C:\Users\Admin\AppData\Local\Temp\Stub\stub.exe C:\Windows\SysWOW64\cmd.exe
PID 4104 wrote to memory of 4564 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 4104 wrote to memory of 4564 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 4104 wrote to memory of 4564 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\chcp.com
PID 4104 wrote to memory of 2036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4104 wrote to memory of 2036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4104 wrote to memory of 2036 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\taskkill.exe
PID 4104 wrote to memory of 3092 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4104 wrote to memory of 3092 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe
PID 4104 wrote to memory of 3092 N/A C:\Windows\SysWOW64\cmd.exe C:\Windows\SysWOW64\timeout.exe

Processes

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

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

C:\Windows\SysWOW64\cmd.exe

"C:\Windows\System32\cmd.exe" /C C:\Users\Admin\AppData\Local\Temp\tmp5A93.tmp.bat

C:\Windows\SysWOW64\chcp.com

chcp 65001

C:\Windows\SysWOW64\taskkill.exe

TaskKill /F /IM 4616

C:\Windows\SysWOW64\timeout.exe

Timeout /T 2 /Nobreak

Network

Country Destination Domain Proto
IE 52.111.236.21:443 tcp

Files

memory/4616-0-0x0000000074D7E000-0x0000000074D7F000-memory.dmp

memory/4616-1-0x0000000000B90000-0x0000000000D22000-memory.dmp

memory/4616-2-0x0000000005770000-0x00000000057D6000-memory.dmp

memory/4616-3-0x0000000074D70000-0x0000000075521000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\tmp5A93.tmp.bat

MD5 75b1e9263fc7b98d7cd3c0dc513bc3cf
SHA1 ec4dda2156d925cfc03d874464e557c4400d44b9
SHA256 5a5ff6683134930d368cfc8ae730a3a1413897a7d309a6b2971e26973b4e4185
SHA512 5dff4054b19848b30ce36db35a2699637237ada2d7d922954201bc82970041b3effc5359e842a9a6f092bcfce36c40442b8a5bf9627af957731d0c2f118a2807

memory/4616-6-0x0000000074D70000-0x0000000075521000-memory.dmp