General

  • Target

    FACTURA POR YD21-PIIMT0726..xlsx

  • Size

    228KB

  • Sample

    211112-lxswpadba2

  • MD5

    f2ecdf9f8a260927da1cc7677453de70

  • SHA1

    9e3514d7b1a267f3b61fe19a5545e68062591278

  • SHA256

    45fa0af9ea01c68fb0e9d26a3cfd4902852f0f97385515bac1cfb7b69b1d661f

  • SHA512

    15e881e11807b0184720f344c9afc80f662ce82cceba25545b97a725d73530fb40f88c7738a471492bd5710324712f08b60c837e25131d8e20f9814ff7a47247

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.lawyerlex.es
  • Port:
    587
  • Username:
    mcenteno@lawyerlex.es
  • Password:
    04092009

Targets

    • Target

      FACTURA POR YD21-PIIMT0726..xlsx

    • Size

      228KB

    • MD5

      f2ecdf9f8a260927da1cc7677453de70

    • SHA1

      9e3514d7b1a267f3b61fe19a5545e68062591278

    • SHA256

      45fa0af9ea01c68fb0e9d26a3cfd4902852f0f97385515bac1cfb7b69b1d661f

    • SHA512

      15e881e11807b0184720f344c9afc80f662ce82cceba25545b97a725d73530fb40f88c7738a471492bd5710324712f08b60c837e25131d8e20f9814ff7a47247

    • AgentTesla

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

    • AgentTesla Payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • 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.

    • Uses the VBS compiler for execution

    • Accesses Microsoft Outlook profiles

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scripting

1
T1064

Exploitation for Client Execution

1
T1203

Defense Evasion

Scripting

1
T1064

Modify Registry

1
T1112

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

2
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks