General

  • Target

    DO1021.exe

  • Size

    780KB

  • Sample

    211018-kg29radcc6

  • MD5

    990c9fb69884ecca7649e09a19a1fdaf

  • SHA1

    730d6bc292b7e9d0777d1499d376109220d4db06

  • SHA256

    d4023ad4b61e07c4b45673cde0069e4acff8096e0578083ed614f1143a434c40

  • SHA512

    0bdaac39d0c1afbe10cbe30dfa246284875191a90e92f80d1f09e8c13177b080a23d17fb59053432cf0c58e11d51125aaf73e656b840f0732ef4c04d3218014e

Malware Config

Extracted

Family

agenttesla

Credentials

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

Targets

    • Target

      DO1021.exe

    • Size

      780KB

    • MD5

      990c9fb69884ecca7649e09a19a1fdaf

    • SHA1

      730d6bc292b7e9d0777d1499d376109220d4db06

    • SHA256

      d4023ad4b61e07c4b45673cde0069e4acff8096e0578083ed614f1143a434c40

    • SHA512

      0bdaac39d0c1afbe10cbe30dfa246284875191a90e92f80d1f09e8c13177b080a23d17fb59053432cf0c58e11d51125aaf73e656b840f0732ef4c04d3218014e

    • 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