General

  • Target

    K98766700.exe

  • Size

    589KB

  • Sample

    241213-jrh37atrhq

  • MD5

    e39c7cf026df55a909a7e18eea93b027

  • SHA1

    1a41eb5df90bcc53c0a80ce38fa99747de6eb237

  • SHA256

    b862fbe92f3de0e033b66e3c9d3afad4d6ff41d8b3553094f66a98db6ba59f0c

  • SHA512

    711c3fddc4aaa37afa6f1c11ff426edfe19ebfae6d955abd23699887d9cf5f31038c2812ac526190d3c7d4fa7a094117be45d75acc6b16fd80c1d13d2eb426f6

  • SSDEEP

    12288:zVAf8axZKrGhdYzjLKUxlyQs6U2+8sq6hcBy+QjnHYyFhqaX3ub:GZKrudYzjL/xp95b6RbCaX3ub

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    ftp
  • Host:
    ftp://ftp.antoniomayol.com:21
  • Port:
    21
  • Username:
    [email protected]
  • Password:
    cMhKDQUk1{;%

Targets

    • Target

      K98766700.exe

    • Size

      589KB

    • MD5

      e39c7cf026df55a909a7e18eea93b027

    • SHA1

      1a41eb5df90bcc53c0a80ce38fa99747de6eb237

    • SHA256

      b862fbe92f3de0e033b66e3c9d3afad4d6ff41d8b3553094f66a98db6ba59f0c

    • SHA512

      711c3fddc4aaa37afa6f1c11ff426edfe19ebfae6d955abd23699887d9cf5f31038c2812ac526190d3c7d4fa7a094117be45d75acc6b16fd80c1d13d2eb426f6

    • SSDEEP

      12288:zVAf8axZKrGhdYzjLKUxlyQs6U2+8sq6hcBy+QjnHYyFhqaX3ub:GZKrudYzjL/xp95b6RbCaX3ub

    • AgentTesla

      Agent Tesla is a remote access tool (RAT) written in visual basic.

    • Agenttesla family

    • UAC bypass

    • Windows security bypass

    • 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.

    • 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.

    • Windows security modification

    • Checks whether UAC is enabled

    • 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.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks