General

  • Target

    4f8acbd7a6e5a07f4efeb296457cc41ae7fef2360a34732620e58a4cce6d9936

  • Size

    599KB

  • Sample

    220521-pbyftsabgp

  • MD5

    3d7e230ceef30ad4d9ec1f9259dfb68a

  • SHA1

    f580f67a55a1b0615beca5a9fa53ce2dfcadf5db

  • SHA256

    4f8acbd7a6e5a07f4efeb296457cc41ae7fef2360a34732620e58a4cce6d9936

  • SHA512

    c63caeb5d88ca24b72c666710736ef775d3cd8ba302d0d0f26c1df7109062611f0f0da4bb00b2c3cd96eba94396a32b81791db53e483183b2b408b9d136a019e

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.dedhivala.com
  • Port:
    587
  • Username:
    cs@dedhivala.com
  • Password:
    enrk7Azx

Targets

    • Target

      PROFORMA INVOICE.exe

    • Size

      748KB

    • MD5

      e99a9f525ab9a57bb4383e7f36d76440

    • SHA1

      2e0055c754cd2b4f547ef559537923ddc041fe39

    • SHA256

      6ae3a5e35dabdf5e52d854c2a9b230008cdcec3ea9b2d3b9227ca419abd62c4c

    • SHA512

      26052078ced24c61910b92ca78d0e424925421a833a65afa5686ff87bb7b06cee2413a11094a54074b02d766f1796f7cdf35dcc0e6d7718cb547cd059ef30381

    • AgentTesla

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

    • AgentTesla Payload

    • Looks for VirtualBox Guest Additions in registry

    • 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.

    • Accesses Microsoft Outlook profiles

    • 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

Persistence

Registry Run Keys / Startup Folder

1
T1060

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

2
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks