Overview

overview

10

Static

static

1

sample

windows11-21h2-x64

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General

  • Target

    sample

  • Size

    271KB

  • Sample

    250123-vzr7lsxjbx

  • MD5

    9d358eea96931304beef5d6221c459f3

  • SHA1

    7715962eb376e9bdfa450c9c2a53ae5948fd8fe5

  • SHA256

    3396735f7c31c4d1ff1de314133cfe9fe408d9a60bbf3807d71fa6fd79ebcf40

  • SHA512

    ab1dd34ce518fc7667b59d69af9a214ebe6c3f988f831c38bbc069ec30a19d93a9f575976096214098eaed047063e5dcba274567bda8030011af19d431a11c30

  • SSDEEP

    6144:edd5TipOL/saqkPV9FH2LtcIDSsmwb9YvZJT3CqbMrhryf65NRPaCieMjAkvCJvY:id5TipOL/saqkPV9FH2LtcIDSsmwb9YZ

Score
10/10
chaosbootkitdefense_evasiondiscoveryevasionexecutionimpactpersistenceransomwarespywarestealertrojanupx

Malware Config

Targets

    • Target

      sample

    • Size

      271KB

    • MD5

      9d358eea96931304beef5d6221c459f3

    • SHA1

      7715962eb376e9bdfa450c9c2a53ae5948fd8fe5

    • SHA256

      3396735f7c31c4d1ff1de314133cfe9fe408d9a60bbf3807d71fa6fd79ebcf40

    • SHA512

      ab1dd34ce518fc7667b59d69af9a214ebe6c3f988f831c38bbc069ec30a19d93a9f575976096214098eaed047063e5dcba274567bda8030011af19d431a11c30

    • SSDEEP

      6144:edd5TipOL/saqkPV9FH2LtcIDSsmwb9YvZJT3CqbMrhryf65NRPaCieMjAkvCJvY:id5TipOL/saqkPV9FH2LtcIDSsmwb9YZ

    Score
    10/10
    chaosbootkitdefense_evasiondiscoveryevasionexecutionimpactpersistenceransomwarespywarestealertrojanupx

    • Chaos

      Ransomware family first seen in June 2021.

      ransomwarechaos

    • Chaos Ransomware

    • Chaos family

      chaos

    • UAC bypass

      defense_evasiontrojan

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomwaredefense_evasionimpactexecution

    • Modifies boot configuration data using bcdedit

      ransomwareevasion

    • Deletes backup catalog

      Uses wbadmin.exe to inhibit system recovery.

      ransomware

    • Disables Task Manager via registry modification

      defense_evasion

    • Downloads MZ/PE file

    • Drops startup file

    • Executes dropped EXE

    • 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

    • Drops desktop.ini file(s)

    • Legitimate hosting services abused for malware hosting/C2

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Sets desktop wallpaper using registry

      ransomware

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

      upx
    behavioral1

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Management Instrumentation

1
T1047

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Direct Volume Access

1
T1006

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Indicator Removal

3
T1070

File Deletion

3
T1070.004

Modify Registry

5
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Subvert Trust Controls

1
T1553

SIP and Trust Provider Hijacking

1
T1553.003

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Browser Information Discovery

1
T1217

Peripheral Device Discovery

1
T1120

Query Registry

3
T1012

Remote System Discovery

1
T1018

System Information Discovery

3
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Exfiltration

Impact

Defacement

1
T1491

Inhibit System Recovery

4
T1490

Tasks