Overview

overview

10

Static

static

7

Convert_mp...kv.exe

windows7-x64

10

Convert_mp...kv.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    Convert_mp4_to_mkv.exe

  • Size

    290KB

  • Sample

    240529-stps7aad61

  • MD5

    62878b796562c411dd59d57dc2076967

  • SHA1

    8f49669864e863ba3a081fe3bd10d88bfc01a10f

  • SHA256

    f3c1bfeb62067c797eb43f47daec11e72c0cbc85d5c26ca001caba5f2732d20a

  • SHA512

    49dd25c2c071376ccdf18ca2bc9d6c03a12226d1bd5e7cc04184d87b9e68c75cd4b4b3bd4d135ede3c821a65609ee26d97adecad9b89ccc5dfdc185d6c5b3795

  • SSDEEP

    3072:H4dzVTaer344JzthRZijQ1Jf12bj8E7bwcZflRVGLDyHzZLB3VDELbkWSecuwjZf:HmRHz4mnREj21g3J/bwGLjejjH6erO

Score
10/10
chaosbootkitdefense_evasionevasionexecutionimpactpersistenceransomwarespywarestealerupx

Malware Config

Targets

    • Target

      Convert_mp4_to_mkv.exe

    • Size

      290KB

    • MD5

      62878b796562c411dd59d57dc2076967

    • SHA1

      8f49669864e863ba3a081fe3bd10d88bfc01a10f

    • SHA256

      f3c1bfeb62067c797eb43f47daec11e72c0cbc85d5c26ca001caba5f2732d20a

    • SHA512

      49dd25c2c071376ccdf18ca2bc9d6c03a12226d1bd5e7cc04184d87b9e68c75cd4b4b3bd4d135ede3c821a65609ee26d97adecad9b89ccc5dfdc185d6c5b3795

    • SSDEEP

      3072:H4dzVTaer344JzthRZijQ1Jf12bj8E7bwcZflRVGLDyHzZLB3VDELbkWSecuwjZf:HmRHz4mnREj21g3J/bwGLjejjH6erO

    Score
    10/10
    chaosdefense_evasionevasionexecutionimpactpersistenceransomwarespywarestealerupxbootkit

    • Chaos

      Ransomware family first seen in June 2021.

      ransomwarechaos

    • Chaos Ransomware

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomwaredefense_evasionimpactexecution

    • Modifies boot configuration data using bcdedit

      ransomwareevasion

    • Renames multiple (200) 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

    • Disables Task Manager via registry modification

      evasion

    • Modifies Installed Components in the registry

      persistence

    • 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

    • UPX packed file

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

      upx

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • 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
    behavioral1behavioral2

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

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Indicator Removal

3
T1070

File Deletion

3
T1070.004

Modify Registry

3
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Peripheral Device Discovery

2
T1120

Query Registry

4
T1012

Remote System Discovery

1
T1018

System Information Discovery

4
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Defacement

1
T1491

Inhibit System Recovery

4
T1490

Tasks