Overview

overview

10

Static

static

10

LENA.exe

windows7-x64

10

LENA.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    LENA.exe

  • Size

    519KB

  • Sample

    250208-xfs1xazmaq

  • MD5

    9f1d43d49dec18bb02d19f7b874a538b

  • SHA1

    0e622f91b3ec6cf8795f324b69bcd4e733bf17c5

  • SHA256

    f09438a852d90d99ec619f8b73d01049be8013004d1e0fe152f7503656ba5db0

  • SHA512

    ccc219193dc438b478732b280c0d60ac33a963a8e3a10878d3e2b0f30c169a8b2b87d857600df3061abb381a8bbb7fc5eb0dc84f6b37cfeac0a7ada9cc5054c8

  • SSDEEP

    12288:SqX5wFxlDE6dpwJvm61wEmzZGvKRz+DFkCSaGXe9z:5CJTyIy

Score
10/10
chaosdefense_evasiondiscoveryevasionexecutionimpactransomwarespywarestealer

Malware Config

Targets

    • Target

      LENA.exe

    • Size

      519KB

    • MD5

      9f1d43d49dec18bb02d19f7b874a538b

    • SHA1

      0e622f91b3ec6cf8795f324b69bcd4e733bf17c5

    • SHA256

      f09438a852d90d99ec619f8b73d01049be8013004d1e0fe152f7503656ba5db0

    • SHA512

      ccc219193dc438b478732b280c0d60ac33a963a8e3a10878d3e2b0f30c169a8b2b87d857600df3061abb381a8bbb7fc5eb0dc84f6b37cfeac0a7ada9cc5054c8

    • SSDEEP

      12288:SqX5wFxlDE6dpwJvm61wEmzZGvKRz+DFkCSaGXe9z:5CJTyIy

    Score
    10/10
    chaosdefense_evasionevasionexecutionimpactransomwarespywarestealerdiscovery

    • Chaos

      Ransomware family first seen in June 2021.

      ransomwarechaos

    • Chaos Ransomware

    • Chaos family

      chaos

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomwaredefense_evasionimpactexecution

    • Modifies boot configuration data using bcdedit

      ransomwareevasion

    • Renames multiple (234) files with added filename extension

      This suggests ransomware activity of encrypting all the files on the system.

      ransomware

    • Deletes backup catalog

      Uses wbadmin.exe to inhibit system recovery.

      ransomware

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • 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

    • Drops desktop.ini file(s)

    • Sets desktop wallpaper using registry

      ransomware
    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

Windows Management Instrumentation

1
T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

1
T1006

Indicator Removal

3
T1070

File Deletion

3
T1070.004

Modify Registry

1
T1112

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

Peripheral Device Discovery

1
T1120

Query Registry

3
T1012

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

Exfiltration

Impact

Defacement

1
T1491

Inhibit System Recovery

4
T1490

Tasks