Overview

overview

8

Static

static

3

Silent Optimizer.exe

windows11-21h2-x64

8

Sharing

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General

  • Target

    SilentOptimizer (1).rar

  • Size

    16.2MB

  • Sample

    240719-lfe89sxdqa

  • MD5

    5f7f88e1f0f1e80743963fffafd1f3d7

  • SHA1

    34ecc089323f5a48c4ded6ceed095efe01b832e5

  • SHA256

    40c999efbed082c775fcf5c2e63dd221ba9d1559a7649ae3c98ada7184fac5a8

  • SHA512

    26ac7a379a757c95362700338f9c4d5782bd898136e3f17f94e6b84b318922c81c950cf8dc449e0b7e081821a9ac76fa62716c193ea87fc9f168cf4b8fade441

  • SSDEEP

    393216:8J8oHbVM1/hAWEeL50R5/or6OIds3mb1K5shuJ2Uyd/v/E5Ok4NlO:8/HbsEsYWs1luYjd/Pk4LO

Score
8/10
defense_evasionexecutionpersistencespywarestealer

Malware Config

Targets

    • Target

      Silent Optimizer.exe

    • Size

      37.6MB

    • MD5

      c7cbc7e63800c94a24fbbf8d30772429

    • SHA1

      f1b0cf8085359450b62902d9e8ef96596b5db4ae

    • SHA256

      aca8fd0fe5ebea04cfd3fa3e4526bea40add68671e1a708637bc393fef4b483b

    • SHA512

      4e32ac11b2f9af9ba866c89b3a686645dc9fb59ab88f6fac4f55846e7a6f01f2cfcbd879f7ab5645f6bd95b98c29c266e771686468f82db911fd9467afcc29b9

    • SSDEEP

      786432:R3on1HvSzxAMNUFZArYsjiWPv0x7OZbEhN:RYn1HvSpNUXmjn4vhN

    Score
    8/10
    defense_evasionexecutionpersistencespywarestealer

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Adds Run key to start application

      persistence

    • Hide Artifacts: Hidden Window

      Windows that would typically be displayed when an application carries out an operation can be hidden.

      defense_evasion

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • An obfuscated cmd.exe command-line is typically used to evade detection.

    behavioral1

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Hide Artifacts

1
T1564

Hidden Window

1
T1564.003

Modify Registry

2
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Process Discovery

1
T1057

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Exfiltration

Impact

Tasks