Overview

overview

10

Static

static

1

BlueStacks...1).exe

windows7-x64

4

BlueStacks...1).exe

windows10-2004-x64

10

Sharing

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General

  • Target

    BlueStacksMicroInstaller_4.190.0.5002_native (1).exe

  • Size

    974KB

  • Sample

    240524-pkm2fsbd65

  • MD5

    7285cfb7e37fbc9d90ac5d9947abea30

  • SHA1

    8529ac4b2cde18079dbc058a0627e13d1fc0e7e1

  • SHA256

    3e55b6d393911bef47c310f713334e7a39e9ff1fdec502131ec419bc3eba3118

  • SHA512

    5af175a6d068f1f48302dd7dacc5e910dccf1af2dda57cae1174b7a51812f6afe11b99c9be951df6f3777b04281e480a4050b727265d8b4701b551104f63f700

  • SSDEEP

    24576:wcVkKS/WtWrnngnnnKnanxNp5t2G1ZfrTdIlolt7+TZv8:wcB6WErnngnnnKnanz3AAZfrTWlItKl8

Score
10/10
bootkitdefense_evasionevasionexecutionimpactpersistencepyinstallerransomwaretrojan

Malware Config

Targets

    • Target

      BlueStacksMicroInstaller_4.190.0.5002_native (1).exe

    • Size

      974KB

    • MD5

      7285cfb7e37fbc9d90ac5d9947abea30

    • SHA1

      8529ac4b2cde18079dbc058a0627e13d1fc0e7e1

    • SHA256

      3e55b6d393911bef47c310f713334e7a39e9ff1fdec502131ec419bc3eba3118

    • SHA512

      5af175a6d068f1f48302dd7dacc5e910dccf1af2dda57cae1174b7a51812f6afe11b99c9be951df6f3777b04281e480a4050b727265d8b4701b551104f63f700

    • SSDEEP

      24576:wcVkKS/WtWrnngnnnKnanxNp5t2G1ZfrTdIlolt7+TZv8:wcB6WErnngnnnKnanz3AAZfrTWlItKl8

    Score
    10/10
    bootkitdefense_evasionevasionexecutionimpactpersistencepyinstallerransomwaretrojan

    • UAC bypass

      evasiontrojan

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

      ransomwaredefense_evasionimpactexecution

    • Drops file in Drivers directory

    • Drops startup file

    • Adds Run key to start application

      persistence

    • Downloads MZ/PE file

    • Enumerates connected drives

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

    • Modifies Installed Components in the registry

      persistence

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Checks computer location settings

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

    • Drops file in System32 directory

    • Modifies WinLogon for persistence

      persistence

    • Sets desktop wallpaper using registry

      ransomware

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1
T1053

Windows Management Instrumentation

1
T1047

Persistence

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Winlogon Helper DLL

1
T1547.004

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Scheduled Task/Job

1
T1053

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Winlogon Helper DLL

1
T1547.004

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Scheduled Task/Job

1
T1053

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Indicator Removal

1
T1070

File Deletion

1
T1070.004

Modify Registry

8
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

5
T1012

System Information Discovery

5
T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Defacement

1
T1491

Inhibit System Recovery

1
T1490

Tasks