General

  • Target

    CheckDevices.exe

  • Size

    10KB

  • Sample

    241208-xdwc9a1re1

  • MD5

    ca36f96aa7ca67cf4d2e227ce393349f

  • SHA1

    21cd010dd38abc00992e88901c5f9f33c167cae2

  • SHA256

    c29a78d31165cb75e92f1b383f2b68bed0249342634c25732de51215296cc6c9

  • SHA512

    5c164a58c5c398e9b393dc22df163a5619f89b96112b0b5deec65b4bc9045c738189bd870a979014d349ad8fe479473d9ef3a133110ec87c037865542bb72452

  • SSDEEP

    192:6rduMPMlcK/7GvRoCZgp8+50Z6Ff/3kySosp+yxp34STVJnIfUqqpOU:QPMlcK/7G5oCK0E/UySoyz34uVGfUqqQ

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %Temp%

  • install_file

    svchost.exe

  • pastebin_url

    https://pastebin.com/raw/vJmE27fr

Extracted

Family

xworm

Version

3.0

C2

plus-loves.gl.at.ply.gg:59327

Attributes
  • Install_directory

    %AppData%

  • install_file

    USB.exe

Targets

    • Target

      CheckDevices.exe

    • Size

      10KB

    • MD5

      ca36f96aa7ca67cf4d2e227ce393349f

    • SHA1

      21cd010dd38abc00992e88901c5f9f33c167cae2

    • SHA256

      c29a78d31165cb75e92f1b383f2b68bed0249342634c25732de51215296cc6c9

    • SHA512

      5c164a58c5c398e9b393dc22df163a5619f89b96112b0b5deec65b4bc9045c738189bd870a979014d349ad8fe479473d9ef3a133110ec87c037865542bb72452

    • SSDEEP

      192:6rduMPMlcK/7GvRoCZgp8+50Z6Ff/3kySosp+yxp34STVJnIfUqqpOU:QPMlcK/7G5oCK0E/UySoyz34uVGfUqqQ

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Dcrat family

    • Detect Xworm Payload

    • Modifies WinLogon for persistence

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks