General

  • Target

    ee2ca67bcd8523fb000065e626ae931d5a15e83e6433f603de6219a5c10ecbce

  • Size

    374KB

  • Sample

    220521-cbrl3adef9

  • MD5

    3b0092e66876f73b483ec9a9ec433717

  • SHA1

    41b0aacf479c4e716c07dcbd9a8451ff26df5f55

  • SHA256

    ee2ca67bcd8523fb000065e626ae931d5a15e83e6433f603de6219a5c10ecbce

  • SHA512

    ca6cb03b943f3c45005dd4c54bca22d91b0ea4d1435a97998248049eb2e810a74ea27380a1e66f696e4dd61b10f4eefe77ae8df02014d313043d3de1afa3f096

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    smtp.mosiactex.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    SlBPFi%7

Targets

    • Target

      New PO 2005-0046_PDF.exe

    • Size

      511KB

    • MD5

      cbf4a2603b689244b97e279dedf5a505

    • SHA1

      51cdb98285fa3809c77c9a22304311354e328ee9

    • SHA256

      891ab6a3b8d3a6f3d8fa8b7bd6499c9f63f73501ea0af12ab8ede86d2d6635be

    • SHA512

      4a50578be162de3c6ae36c53ed911b1441f0c17a8ac5332d13a6ceee9aac6ae2663f7f4178b72671c4d92b4afd0cc33fb96b02e419d9cfaaf2881ba4d1d8c0ab

    • 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

    • 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

2
T1082

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks