Overview

overview

10

Static

static

10

2024-04-03...ck.exe

windows7-x64

10

2024-04-03...ck.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    2024-04-03_c1aeba6369a3615061f44778021f6b42_virlock
  • Size 163KB
  • Sample240403-ntvxzsdb32
  • SHA256 357908d9f3abf01fcc8d4d3527483d5b9993cd1f70d7af2897ed313f05a39d97
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
evasionpersistenceransomwarespywarestealertrojanupx

Malware Config

Targets

    • Target
      2024-04-03_c1aeba6369a3615061f44778021f6b42_virlock
    • Size 163KB
    • SHA256 357908d9f3abf01fcc8d4d3527483d5b9993cd1f70d7af2897ed313f05a39d97
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    evasionpersistencespywarestealertrojanupxransomware

    • Modifies visibility of file extensions in Explorer

      evasion

    • UAC bypass

      evasiontrojan

    • Renames multiple (71) files with added filename extension

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

      ransomware

    • UPX dump on OEP (original entry point)

    • Checks computer location settings

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

    • Deletes itself

    • 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

    • UPX packed file

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

      upx

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

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

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

4
T1112

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

Command and Control

Exfiltration

Impact

Tasks