Malware Analysis Report

2025-04-13 12:23

Sample ID 250319-qdvcmazrx8
Target Cooperbuild34.exe
SHA256 18cdbd760961bbe45ab6dac098badab8556e5c28cd24744c58f84eb3255da992
Tags
stealerium stealer
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

18cdbd760961bbe45ab6dac098badab8556e5c28cd24744c58f84eb3255da992

Threat Level: Known bad

The file Cooperbuild34.exe was found to be: Known bad.

Malicious Activity Summary

stealerium stealer

Stealerium

Stealerium family

Checks computer location settings

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

Analysis: static1

Detonation Overview

Reported

2025-03-19 13:09

Signatures

Stealerium family

stealerium

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-03-19 13:09

Reported

2025-03-19 13:11

Platform

win7-20250207-en

Max time kernel

121s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe"

Signatures

Stealerium

stealer stealerium

Stealerium family

stealerium

Enumerates physical storage devices

Delays execution with timeout.exe

defense_evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A

Kills process with taskkill

defense_evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\taskkill.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\taskkill.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe

"C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\229d6ac9-ce43-4138-8f89-68806683e59f.bat"

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\taskkill.exe

taskkill /F /PID 2072

C:\Windows\system32\timeout.exe

timeout /T 2 /NOBREAK

Network

N/A

Files

memory/2072-0-0x000007FEF5EB3000-0x000007FEF5EB4000-memory.dmp

memory/2072-1-0x0000000000B10000-0x000000000121E000-memory.dmp

memory/2072-2-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\229d6ac9-ce43-4138-8f89-68806683e59f.bat

MD5 3645127da67c01781fc6724df29c23d2
SHA1 d7e2c1a31afd216dbe6657fec7087424b313e809
SHA256 87521f0dd17aca0d4c66aba55f5cdd866e022b1efbed558096328edda7c402e3
SHA512 3c0237135f8de05fa7e9e397fd6bc025a11e5eefcec52bdccadee1c129beb23ba091ca5cacfcf12a0cf9a7ee7b3ce38405b86a9f4adc4ad899556689d0326522

memory/2072-7-0x000007FEF5EB0000-0x000007FEF689C000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-03-19 13:09

Reported

2025-03-19 13:11

Platform

win10v2004-20250314-en

Max time kernel

105s

Max time network

112s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe"

Signatures

Stealerium

stealer stealerium

Stealerium family

stealerium

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-308834014-1004923324-1191300197-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe N/A

Enumerates physical storage devices

Delays execution with timeout.exe

defense_evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A

Kills process with taskkill

defense_evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\taskkill.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\system32\taskkill.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4828 wrote to memory of 5820 N/A C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe C:\Windows\System32\cmd.exe
PID 4828 wrote to memory of 5820 N/A C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe C:\Windows\System32\cmd.exe
PID 5820 wrote to memory of 1328 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\chcp.com
PID 5820 wrote to memory of 1328 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\chcp.com
PID 5820 wrote to memory of 2804 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\taskkill.exe
PID 5820 wrote to memory of 2804 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\taskkill.exe
PID 5820 wrote to memory of 3912 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\timeout.exe
PID 5820 wrote to memory of 3912 N/A C:\Windows\System32\cmd.exe C:\Windows\system32\timeout.exe

Processes

C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe

"C:\Users\Admin\AppData\Local\Temp\Cooperbuild34.exe"

C:\Windows\System32\cmd.exe

"C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\9c86b95a-a76d-4dd6-8a4b-63d2106be58f.bat"

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\taskkill.exe

taskkill /F /PID 4828

C:\Windows\system32\timeout.exe

timeout /T 2 /NOBREAK

Network

Country Destination Domain Proto
GB 142.250.187.195:80 c.pki.goog tcp

Files

memory/4828-0-0x00007FFFDCDE3000-0x00007FFFDCDE5000-memory.dmp

memory/4828-1-0x0000012F43D40000-0x0000012F4444E000-memory.dmp

memory/4828-2-0x00007FFFDCDE0000-0x00007FFFDD8A1000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\9c86b95a-a76d-4dd6-8a4b-63d2106be58f.bat

MD5 5177fd1761d42d1aad35da64c355db37
SHA1 b48c8785f43f65425d2d0d1b825ad497c1bb0703
SHA256 b5137698e167e822092c3929918964f72a79f8ef5fc2e65afa3341df1a8f33d7
SHA512 31e83191f4334b97ba468b6e6785c28994cd3b51d504ed1d122cd691c5a07b4d10e3fd9ddcef95d54237d11ad93fbc2dcb932365b20e1e2161d8f3ce04a170f1

memory/4828-7-0x00007FFFDCDE0000-0x00007FFFDD8A1000-memory.dmp