General

  • Target

    2024-06-13_10f5141d19c63e1f2770208b81ea4e54_virlock

  • Size

    211KB

  • Sample

    240613-fbsqxayaqp

  • MD5

    10f5141d19c63e1f2770208b81ea4e54

  • SHA1

    2ea187c17134d14de7cddd0de98e1a91ed9e0d79

  • SHA256

    9b491e2d73b6864890b41ecab4a1f24d0e1d8e72d6c0f1c7613cfc4e77c6a68f

  • SHA512

    fb95fec92e6d5ff356afd27b9dbe8abad2ff65cf73ff679678f48a7e82e13b844ac0133231e80db9957a55b3b5e0553ca291e360065c1ee1305f608aa0092d45

  • SSDEEP

    3072:EMggKxb5ct9NaLaViVzx4kLUzDi02owyqwZf2l9cz3nDMrA:fg3xb5qpnlzDegqwZ+9gAs

Malware Config

Targets

    • Target

      2024-06-13_10f5141d19c63e1f2770208b81ea4e54_virlock

    • Size

      211KB

    • MD5

      10f5141d19c63e1f2770208b81ea4e54

    • SHA1

      2ea187c17134d14de7cddd0de98e1a91ed9e0d79

    • SHA256

      9b491e2d73b6864890b41ecab4a1f24d0e1d8e72d6c0f1c7613cfc4e77c6a68f

    • SHA512

      fb95fec92e6d5ff356afd27b9dbe8abad2ff65cf73ff679678f48a7e82e13b844ac0133231e80db9957a55b3b5e0553ca291e360065c1ee1305f608aa0092d45

    • SSDEEP

      3072:EMggKxb5ct9NaLaViVzx4kLUzDi02owyqwZf2l9cz3nDMrA:fg3xb5qpnlzDegqwZ+9gAs

    • Modifies visibility of file extensions in Explorer

    • UAC bypass

    • Renames multiple (58) files with added filename extension

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

    • 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.

    • Adds Run key to start application

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v13

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

Collection

Data from Local System

1
T1005

Tasks