Overview

overview

10

Static

static

3

2024-04-28...ck.exe

windows7-x64

10

2024-04-28...ck.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    2024-04-28_99e237b158fe7679f35380cc729a7bdc_virlock

  • Size

    137KB

  • Sample

    240428-q4d4bsha57

  • MD5

    99e237b158fe7679f35380cc729a7bdc

  • SHA1

    3bb9d1712e1b96134dcb7f3bd32a8234b4070f76

  • SHA256

    43931d257e82e59e89693dfba6d2e147aff2802125028f90de1f7c2b565db66b

  • SHA512

    75ddb9c9e15846ebb0a379ae073b8f5af3fa30a6198c4f7de1c7799fde9dc1eb0f9d501d1da2821ca625308b7b9e10175f76136404d749494370c9b06c99f872

  • SSDEEP

    3072:OsM8BjA/wRJ3WoTOdwmg3BuQ0bckOWiEb5Rfv:OP8EwbWoTOdwmg3nEVp

Score
10/10
evasionpersistenceransomwarespywarestealertrojan

Malware Config

Targets

    • Target

      2024-04-28_99e237b158fe7679f35380cc729a7bdc_virlock

    • Size

      137KB

    • MD5

      99e237b158fe7679f35380cc729a7bdc

    • SHA1

      3bb9d1712e1b96134dcb7f3bd32a8234b4070f76

    • SHA256

      43931d257e82e59e89693dfba6d2e147aff2802125028f90de1f7c2b565db66b

    • SHA512

      75ddb9c9e15846ebb0a379ae073b8f5af3fa30a6198c4f7de1c7799fde9dc1eb0f9d501d1da2821ca625308b7b9e10175f76136404d749494370c9b06c99f872

    • SSDEEP

      3072:OsM8BjA/wRJ3WoTOdwmg3BuQ0bckOWiEb5Rfv:OP8EwbWoTOdwmg3nEVp

    Score
    10/10
    evasionpersistencespywarestealertrojanransomware

    • Modifies visibility of file extensions in Explorer

      evasion

    • UAC bypass

      evasiontrojan

    • Renames multiple (81) files with added filename extension

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

      ransomware

    • Checks computer location settings

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

    • Executes dropped EXE

    • 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

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

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

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Modify Registry

4
T1112

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks