General

  • Target

    conta_injector.exe

  • Size

    2.6MB

  • Sample

    231220-vcm95sgbdr

  • MD5

    136572773a0b95e37f25ee732cd20564

  • SHA1

    d5aa4913be0eb1a47fe95cdec0f398992b1066e9

  • SHA256

    879fc1eabb8371e770a2fea4362086d08fb8743ce5343465cbedf0c2fdd4404f

  • SHA512

    872c0dc675516b91d8ea43094532c749789753d631979070163c5b71adc088dd2e33393879658e0a361de3fc4f5ed1bd150ebc8658b558abfc46ccc7c8cee0ef

  • SSDEEP

    49152:RP5mffPrD+IndQgKAr5ozxzu6LAH3zu292AXR3jzLzvX:RP5mvrD+ClNo9ztLA

Malware Config

Extracted

Family

xworm

Attributes
  • Install_directory

    %LocalAppData%

  • install_file

    InvidiaDriver.exe

Targets

    • Target

      conta_injector.exe

    • Size

      2.6MB

    • MD5

      136572773a0b95e37f25ee732cd20564

    • SHA1

      d5aa4913be0eb1a47fe95cdec0f398992b1066e9

    • SHA256

      879fc1eabb8371e770a2fea4362086d08fb8743ce5343465cbedf0c2fdd4404f

    • SHA512

      872c0dc675516b91d8ea43094532c749789753d631979070163c5b71adc088dd2e33393879658e0a361de3fc4f5ed1bd150ebc8658b558abfc46ccc7c8cee0ef

    • SSDEEP

      49152:RP5mffPrD+IndQgKAr5ozxzu6LAH3zu292AXR3jzLzvX:RP5mvrD+ClNo9ztLA

    • Detect Umbral payload

    • Detect Xworm Payload

    • Umbral

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

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Downloads MZ/PE file

    • 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.

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks