General

  • Target

    paint.net.5.0.2.install.anycpu.web.exe

  • Size

    1MB

  • Sample

    230308-3pesjage8v

  • MD5

    6a5e8c6eec9ab6ed7088bc35739e52d5

  • SHA1

    be77e05970628d62c65b0bd609ef7ab5bb705c8f

  • SHA256

    9d3edf7ade8ce94aaa6038e894562229e002a86840835e573caf1116e7b928a5

  • SHA512

    e56e5356bee8d6d942f1bee7acd0a31fa03f51a7614df6f7bcdec89ec26cc3e7ea686892325938e7156f23c78814e0a9f04eeff255853939b157004ed6c12ed0

  • SSDEEP

    24576:7rYYYYkWYCzwLhA29pQCo7jIC0BuDgwf0z:7rYYYYkvLhA29piUDjwe

Malware Config

Targets

    • Target

      paint.net.5.0.2.install.anycpu.web.exe

    • Size

      1MB

    • MD5

      6a5e8c6eec9ab6ed7088bc35739e52d5

    • SHA1

      be77e05970628d62c65b0bd609ef7ab5bb705c8f

    • SHA256

      9d3edf7ade8ce94aaa6038e894562229e002a86840835e573caf1116e7b928a5

    • SHA512

      e56e5356bee8d6d942f1bee7acd0a31fa03f51a7614df6f7bcdec89ec26cc3e7ea686892325938e7156f23c78814e0a9f04eeff255853939b157004ed6c12ed0

    • SSDEEP

      24576:7rYYYYkWYCzwLhA29pQCo7jIC0BuDgwf0z:7rYYYYkvLhA29piUDjwe

    • CoreEntity .NET Packer

      A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies system executable filetype association

    • Registers COM server for autorun

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Enumerates connected drives

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

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Change Default File Association

1
T1042

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

1
T1112

Discovery

Query Registry

5
T1012

System Information Discovery

6
T1082

Peripheral Device Discovery

2
T1120

Tasks