Overview

overview

10

Static

static

3

2024-05-25...ck.exe

windows7-x64

10

2024-05-25...ck.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    2024-05-25_b6862b585b36fabe2dfc59188bf8cb07_virlock

  • Size

    117KB

  • Sample

    240525-yryk7sgh76

  • MD5

    b6862b585b36fabe2dfc59188bf8cb07

  • SHA1

    7c25b7b864b2f5fed4f9f916664fe0446e27b797

  • SHA256

    98d75a3c50e0f29b199a323a902f33a65bebe169a6532f5d2569e93289a1f654

  • SHA512

    b6258a0b4ce28aa8b15d83b9369e5d04533d0123a0e0823bdbf71908f5dbdc3383fe649bd9cbbae1cc472f623b852d4bd5075125d1bedaac3b12366912e4b59c

  • SSDEEP

    3072:LcCzV5J5MeC0hivrhYtrS22tUb0XqiMa9mSg:LcyIYhSYlPQXP8n

Score
10/10
evasionpersistenceransomwarespywarestealertrojan

Malware Config

Targets

    • Target

      2024-05-25_b6862b585b36fabe2dfc59188bf8cb07_virlock

    • Size

      117KB

    • MD5

      b6862b585b36fabe2dfc59188bf8cb07

    • SHA1

      7c25b7b864b2f5fed4f9f916664fe0446e27b797

    • SHA256

      98d75a3c50e0f29b199a323a902f33a65bebe169a6532f5d2569e93289a1f654

    • SHA512

      b6258a0b4ce28aa8b15d83b9369e5d04533d0123a0e0823bdbf71908f5dbdc3383fe649bd9cbbae1cc472f623b852d4bd5075125d1bedaac3b12366912e4b59c

    • SSDEEP

      3072:LcCzV5J5MeC0hivrhYtrS22tUb0XqiMa9mSg:LcyIYhSYlPQXP8n

    Score
    10/10
    evasionpersistencespywarestealertrojanransomware

    • Modifies visibility of file extensions in Explorer

      evasion

    • UAC bypass

      evasiontrojan

    • Renames multiple (78) 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.

    • 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

    • 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