General

  • Target

    201586.pdf.zip

  • Size

    462KB

  • Sample

    211019-gw38tagbgq

  • MD5

    8d2c16e7868152fdae3c5c4204588d40

  • SHA1

    15819f08d0746ed6b00c3a30dae89b250ccffb97

  • SHA256

    25bde167c9b953f89ef5ff0031c2cfa197eb00c94b65fd2c461e7020f85e4460

  • SHA512

    97cfd507426ff0747eb789a4e460ba8aceb81c20c5f5a109b4040d2c48056873f6f0594012fe9f5063706ba49f0e406443a9e17c7c7428dfd1685dbc0f3fa3c3

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.merchantexint.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    merW&13@

Targets

    • Target

      201586.exe

    • Size

      795KB

    • MD5

      8a6465a960395e718b9489c5738a1714

    • SHA1

      fc72045fbc8157ed4035d53f12cf36738ecad644

    • SHA256

      fe8fd282bdc1f838ff2dad9b56b6bd615fb7f76fa69775c5afd5ee204dd007f6

    • SHA512

      7918da056a93b0e03dd79f18fd6f6360ca945342619cee7f19329069ad9c495947de345dca6b7aaea27184574056b80ae5add6079e0f7e57f33de0121f68c7b9

    • 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.

    • Accesses Microsoft Outlook profiles

    • 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

1
T1112

Credential Access

Credentials in Files

3
T1081

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks