General

  • Target

    RFQ_20210715 & PO#2021.exe

  • Size

    939KB

  • Sample

    210715-pgzedsm6y2

  • MD5

    4f4aba8fedeb7002f52d11375bac37de

  • SHA1

    7a49569d723e6895f194303edc7487683c126de6

  • SHA256

    9b4a7d90be6f0d791e5f83efce3c0cabe8cc7995573e8250f0905c2c5eb0e17a

  • SHA512

    417af3edd6615bf8f214f46ad1b1d1bffc9ada54f21b13df4a714d65caf788966b97b5293587a621d493619349801855254c39f2a8477e4843b375ba30bcd17b

Malware Config

Extracted

Family

agenttesla

Credentials

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

Targets

    • Target

      RFQ_20210715 & PO#2021.exe

    • Size

      939KB

    • MD5

      4f4aba8fedeb7002f52d11375bac37de

    • SHA1

      7a49569d723e6895f194303edc7487683c126de6

    • SHA256

      9b4a7d90be6f0d791e5f83efce3c0cabe8cc7995573e8250f0905c2c5eb0e17a

    • SHA512

      417af3edd6615bf8f214f46ad1b1d1bffc9ada54f21b13df4a714d65caf788966b97b5293587a621d493619349801855254c39f2a8477e4843b375ba30bcd17b

    • 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