General

  • Target

    94a9aea0d58aed1c57e0f3857ea7de65778a6faab1912e4decbe463bf7b85ae8

  • Size

    1.9MB

  • Sample

    241229-x98nfswkhx

  • MD5

    477ee009f176249987f15c8fd01902f0

  • SHA1

    c40e6e81adcca5bf643ea005e3e2bc062793985d

  • SHA256

    94a9aea0d58aed1c57e0f3857ea7de65778a6faab1912e4decbe463bf7b85ae8

  • SHA512

    aef7538f615ec5607f56f41f17ad045a4ac8bba6e7a27e185068208a7ea704c01b1b87aaae0b5cb42f2e61ee11dd344e01c2f8d2d089a026e14931935da6dfef

  • SSDEEP

    24576:IRDdNQlDWcG0ZbOOdezYwITkHiPIZp7WAvck0poRtf0BJngtcp90kcTFI8A+W4+u:IRDTQRzMKeEcHLZkA0ruJd/

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1322985421172641892/q0_diVrV3tWC0qMrnQumssRXcZ18yaPSUtiPWfKvRg2S6sXoeNRQ-lKC87d8pURrSvkv

Extracted

Family

xworm

Version

5.0

C2

were-breeding.gl.at.ply.gg:1234

Mutex

ecqG44OAn0ybERsL

Attributes
  • Install_directory

    %AppData%

  • install_file

    USB.exe

aes.plain

Targets

    • Target

      94a9aea0d58aed1c57e0f3857ea7de65778a6faab1912e4decbe463bf7b85ae8

    • Size

      1.9MB

    • MD5

      477ee009f176249987f15c8fd01902f0

    • SHA1

      c40e6e81adcca5bf643ea005e3e2bc062793985d

    • SHA256

      94a9aea0d58aed1c57e0f3857ea7de65778a6faab1912e4decbe463bf7b85ae8

    • SHA512

      aef7538f615ec5607f56f41f17ad045a4ac8bba6e7a27e185068208a7ea704c01b1b87aaae0b5cb42f2e61ee11dd344e01c2f8d2d089a026e14931935da6dfef

    • SSDEEP

      24576:IRDdNQlDWcG0ZbOOdezYwITkHiPIZp7WAvck0poRtf0BJngtcp90kcTFI8A+W4+u:IRDTQRzMKeEcHLZkA0ruJd/

    • Detect Umbral payload

    • Detect Xworm Payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Umbral family

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Xworm family

    • Looks for VirtualBox Guest Additions in registry

    • Command and Scripting Interpreter: PowerShell

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

    • Drops file in Drivers directory

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • 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.

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

MITRE ATT&CK Enterprise v15

Tasks