General

  • Target

    d.exe

  • Size

    875KB

  • Sample

    210718-r32rrfgg46

  • MD5

    3437bbb0a6be653c667b3091671af69a

  • SHA1

    5378934fb1364286a61b453479aafb3811a6c9ac

  • SHA256

    21a650e682952584b3226d026f5ae19917fbea420ab8e3a7486610c368939a83

  • SHA512

    40d80c76a4f5c0b09b0c332668ee5fad14f15108fb5f8c9ad261be47bc9e20874c890ec991844425445adb80443b06120e7b599e9420cbfb0ac2aefb9d6b4555

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.yillmachine.com
  • Port:
    587
  • Username:
    datalogs2020@yillmachine.com
  • Password:
    FCcHFCp8

Targets

    • Target

      d.exe

    • Size

      875KB

    • MD5

      3437bbb0a6be653c667b3091671af69a

    • SHA1

      5378934fb1364286a61b453479aafb3811a6c9ac

    • SHA256

      21a650e682952584b3226d026f5ae19917fbea420ab8e3a7486610c368939a83

    • SHA512

      40d80c76a4f5c0b09b0c332668ee5fad14f15108fb5f8c9ad261be47bc9e20874c890ec991844425445adb80443b06120e7b599e9420cbfb0ac2aefb9d6b4555

    • AgentTesla

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

    • AgentTesla Payload

    • Executes dropped EXE

    • Loads dropped DLL

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

2
T1112

Install Root Certificate

1
T1130

Credential Access

Credentials in Files

3
T1081

Collection

Data from Local System

3
T1005

Tasks