General

  • Target

    INVOICE & TELEX BL_PDF.exe

  • Size

    862KB

  • Sample

    210927-rjfbbshbg2

  • MD5

    22a2657bb48e3303f6f0a0fd1fdfe441

  • SHA1

    d6a230a732f3d691a7fce60081f30627ffabd33d

  • SHA256

    85627117b351e81655bb56b947b61a198d195a225db0e002ef476460b9f273ac

  • SHA512

    5e24b5f9c3886c9fdeaa968ccc59882b24a4c4cf8d90f4ae7d44ba4ed96bc91800d2f98c1eace2426a5dfe7a16f7c1233b1d54607d17ccba490d9e03514d569c

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.zfftcn.com
  • Port:
    587
  • Username:
    slot2@zfftcn.com
  • Password:
    *VNHf^L9

Targets

    • Target

      INVOICE & TELEX BL_PDF.exe

    • Size

      862KB

    • MD5

      22a2657bb48e3303f6f0a0fd1fdfe441

    • SHA1

      d6a230a732f3d691a7fce60081f30627ffabd33d

    • SHA256

      85627117b351e81655bb56b947b61a198d195a225db0e002ef476460b9f273ac

    • SHA512

      5e24b5f9c3886c9fdeaa968ccc59882b24a4c4cf8d90f4ae7d44ba4ed96bc91800d2f98c1eace2426a5dfe7a16f7c1233b1d54607d17ccba490d9e03514d569c

    • AgentTesla

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

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • Drops file in Drivers directory

    • Looks for VMWare Tools registry key

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • 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.

    • Maps connected drives based on registry

      Disk information is often read in order to detect sandboxing environments.

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Credentials in Files

3
T1081

Discovery

Query Registry

4
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Tasks