General

  • Target

    e98968f1589b8053634f973297a144deb8772c01acf510be339ef041b66f085d

  • Size

    857KB

  • Sample

    220520-141mfaefb9

  • MD5

    4d859cea6d19e83e2839654455263616

  • SHA1

    01e17105c0afa7c6e9069994a6ea0a21186e651e

  • SHA256

    e98968f1589b8053634f973297a144deb8772c01acf510be339ef041b66f085d

  • SHA512

    97f8683d7b42ecef5b1a0d15b4152d1a74c59acbbaf2f6937d60ff4bf3c796fdbe0971d4d26ba407e02ffa39756ddd7c271345ea02278981e08339e28ef1cdbe

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.bunsadokum.com
  • Port:
    587
  • Username:
    [email protected]
  • Password:
    posta38Bunsa

Targets

    • Target

      HALKBANK.exe

    • Size

      2.6MB

    • MD5

      c291db2a12b8b6cac2a34c15f3ebd92e

    • SHA1

      552ecf8af82f538b251e42f0ad3e1a45f7144887

    • SHA256

      dc12d4cb1e8224bd26571c7ce1c557740851ac248f56a5e449494e55c0edd722

    • SHA512

      6d63e75a2348659fff3d50062dcafef922bcb0385e148b5d93c61671134a639b51e491dbde4b3b18aed6adc87f24549b8cc1b42eb3b249ba7eb628b33f1f1392

    • AgentTesla

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

    • MassLogger

      Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

    • MassLogger Main Payload

    • AgentTesla Payload

    • Executes dropped EXE

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Loads dropped DLL

    • 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

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

3
T1005

Email Collection

1
T1114

Tasks