General

  • Target

    avast_premium_security_setup_online.exe

  • Size

    257KB

  • Sample

    240614-2s9lmszalh

  • MD5

    674f72a3a9999445beebb8f0e6172d39

  • SHA1

    10f4862250e613ed836c3813ac21c779f2007c63

  • SHA256

    2a23fcb070ece90f2c7b6e4901cf6fdee9231943d8ed8b54d97ef6f43ea87673

  • SHA512

    417eca946acb5bd0bf52466b4468790f2a059975598fdf7f77b32ad1fc4eddcdeebbc4b61bf815cf9d1b9f6f2a95f616ce77608acf6b7ebd9a105f45ee221ed5

  • SSDEEP

    3072:y2RaiKg4xmUh1WXHqw/l+qmOELhakVsm3mxB32tLEv8zfdn5f2dZLCozOhhjn+T6:y0KgGwHqwOOELha+sm2D2+UhnguI5

Malware Config

Targets

    • Target

      avast_premium_security_setup_online.exe

    • Size

      257KB

    • MD5

      674f72a3a9999445beebb8f0e6172d39

    • SHA1

      10f4862250e613ed836c3813ac21c779f2007c63

    • SHA256

      2a23fcb070ece90f2c7b6e4901cf6fdee9231943d8ed8b54d97ef6f43ea87673

    • SHA512

      417eca946acb5bd0bf52466b4468790f2a059975598fdf7f77b32ad1fc4eddcdeebbc4b61bf815cf9d1b9f6f2a95f616ce77608acf6b7ebd9a105f45ee221ed5

    • SSDEEP

      3072:y2RaiKg4xmUh1WXHqw/l+qmOELhakVsm3mxB32tLEv8zfdn5f2dZLCozOhhjn+T6:y0KgGwHqwOOELha+sm2D2+UhnguI5

    • Suspicious use of NtCreateProcessExOtherParentProcess

    • Drops file in Drivers directory

    • Sets service image path in registry

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Windows security modification

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Downloads MZ/PE file

    • Writes to the Master Boot Record (MBR)

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

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Defense Evasion

Modify Registry

4
T1112

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Software Discovery

1
T1518

Security Software Discovery

1
T1518.001

Query Registry

5
T1012

Peripheral Device Discovery

1
T1120

System Information Discovery

3
T1082

Collection

Data from Local System

1
T1005

Tasks