General

  • Target

    kdmapper.exe

  • Size

    4.4MB

  • Sample

    241227-q3lrsawkas

  • MD5

    f67ce1c7f9360af571a329573d0b38ed

  • SHA1

    f72c8ecaf324a31b2c3bf7ca15514af09ec3841f

  • SHA256

    ee45a91c9cf4646ec221733677e6ad5e50c32d10659528ffd6df4c25ff52e138

  • SHA512

    f2a55d9070f56d0bcbf6f4db36c3e9655c80e61db55720935369e0d4a1c59f5ec5e0907864b522af24fba17b85ebe60251b22d32a4b9afc1448bf7e3f0456fbd

  • SSDEEP

    49152:vm9xoQqBH6m4FTkEKVb0kxFAIXH3v2DK2cts9pX+D1+nISQbp2PyjzWT0q+Tnba:vTJhb+QzwCXuDKZts9p7epNAu

Malware Config

Extracted

Family

gurcu

C2

https://api.telegram.org/bot5762556674:AAEDKiSo2UQxhk0zMWyUd-HWI4AQklzutJI/sendPhot

Targets

    • Target

      kdmapper.exe

    • Size

      4.4MB

    • MD5

      f67ce1c7f9360af571a329573d0b38ed

    • SHA1

      f72c8ecaf324a31b2c3bf7ca15514af09ec3841f

    • SHA256

      ee45a91c9cf4646ec221733677e6ad5e50c32d10659528ffd6df4c25ff52e138

    • SHA512

      f2a55d9070f56d0bcbf6f4db36c3e9655c80e61db55720935369e0d4a1c59f5ec5e0907864b522af24fba17b85ebe60251b22d32a4b9afc1448bf7e3f0456fbd

    • SSDEEP

      49152:vm9xoQqBH6m4FTkEKVb0kxFAIXH3v2DK2cts9pX+D1+nISQbp2PyjzWT0q+Tnba:vTJhb+QzwCXuDKZts9p7epNAu

    • DcRat

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

    • Dcrat family

    • Gurcu family

    • Gurcu, WhiteSnake

      Gurcu aka WhiteSnake is a malware stealer written in C#.

    • Modifies WinLogon for persistence

    • Process spawned unexpected child process

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

    • DCRat payload

    • Command and Scripting Interpreter: PowerShell

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

    • A potential corporate email address has been identified in the URL: [email protected]

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

    • 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