General

  • Target

    COPY OF N-N.zip

  • Size

    521KB

  • Sample

    210511-22lf9vp25x

  • MD5

    ecd2ca9a3bb12f5536705b7e4fe2fcda

  • SHA1

    6e7baeaf9376e111c49cd0eb4b9b77ed32a41ed7

  • SHA256

    27985ef546ffd6c9239b45bce432f59593c54591d3c2c306ffc5b485d02cf03c

  • SHA512

    4a45f9d28be7129e6f375e0af5161aa7ea232c31e027fb401c8609641dfd0efbd1a99c7ecf81dd0af985caba42c51c2ea7fb244a88012228ab66721bcaf504bc

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.medamanagement.com
  • Port:
    587
  • Username:
    info@medamanagement.com
  • Password:
    20@radihX21@Meda

Targets

    • Target

      COPY OF N-N.exe

    • Size

      725KB

    • MD5

      e835f5a976ab1d8dd4e4e10813dd2a67

    • SHA1

      68d789fcc36fdd8eb5cbb5b58c55cb1d48174c24

    • SHA256

      c1269286a5b767fbd0b90c97cc06279b08ed094069932c8d17acc4c3144a218b

    • SHA512

      269eac258dd1b830f165b253be7cd533f6a99266fcec1e0c4367eb84098cea0c66bd1b40b0788e57de97e2c387240948d2145abb83230bce1b719360831d080b

    • 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.

    • Adds Run key to start application

    • 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

Execution

Scheduled Task

1
T1053

Persistence

Registry Run Keys / Startup Folder

1
T1060

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Modify Registry

1
T1112

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