Overview

overview

10

Static

static

3b8d8d0831...a4.exe

windows7_x64

10

3b8d8d0831...a4.exe

windows10-2004_x64

10

Analysis

  • max time kernel
    202s
  • max time network
    214s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    11-05-2022 00:59

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General

  • Target

    3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe

  • Size

    787KB

  • MD5

    73485f0a753288ff5f7b4a62ecbf051d

  • SHA1

    cf9e21945490fb9a64d5414d0683da0b770059b0

  • SHA256

    3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4

  • SHA512

    ecd43dd38927343c458f10ef5fa560560f73f59faf7fcf0708ea8422c1551539a3aa781342f24bdeb83fb47b9c13e06eb7e1e546a845783ec3b7a16bd97ecf70

Score
10/10
taurusdiscoveryevasionspywarestealertrojan

Malware Config

Signatures

  • Taurus Stealer

    Taurus is an infostealer first seen in June 2020.

    trojanstealertaurus
  • Taurus Stealer Payload 1 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
    evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    evasion
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Accesses 2FA software files, possible credential harvesting 2 TTPs
    spywarestealer
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe
    "C:\Users\Admin\AppData\Local\Temp\3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe"
    1⤵
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2228
    • C:\Windows\SysWOW64\cmd.exe
      /c timeout /t 3 & del /f /q C:\Users\Admin\AppData\Local\Temp\3b8d8d08318bddad928f55c81d4f0d7e7188ce9658e25110f4e0d3e74256d8a4.exe
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3148
      • C:\Windows\SysWOW64\timeout.exe
        timeout /t 3
        3⤵
        • Delays execution with timeout.exe
        PID:4656

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Credentials in Files

2
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

1
T1082

Lateral Movement

Collection

Data from Local System

2
T1005

Exfiltration

Command and Control

Impact

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Downloads

  • memory/2228-130-0x0000000077DD0000-0x0000000077F73000-memory.dmp
    Filesize

    1.6MB

    Download
  • memory/2228-131-0x00000000002F0000-0x00000000004AB000-memory.dmp
    Filesize

    1.7MB

    Download
  • memory/3148-132-0x0000000000000000-mapping.dmp
    Download
  • memory/4656-133-0x0000000000000000-mapping.dmp
    Download