General

  • Target

    996bfdb4638f325046e246becbdcf3e3c34c535d8691eb0cf9416a54fe6cdfee

  • Size

    527KB

  • Sample

    220521-xk1xbafcbm

  • MD5

    58e073999290be942975358867e5653a

  • SHA1

    b943b2a30fcd8645fb0a6b2f4da24227b2b1c3e2

  • SHA256

    996bfdb4638f325046e246becbdcf3e3c34c535d8691eb0cf9416a54fe6cdfee

  • SHA512

    b3a85a83e06ae8a659153814a9a989423c0d981e216bdccf7dd4361c9152be6114e19c925916e7f2c417ef15662b84fcdf3c41b741cbb2962f5a6421085f3543

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.bestinjectionmachines.com
  • Port:
    587
  • Username:
    a.yassin@bestinjectionmachines.com
  • Password:
    @?w-%n6@l_sU

Targets

    • Target

      order 2020.pdf.exe

    • Size

      664KB

    • MD5

      d6661155f6b79ff949129321dd3505b6

    • SHA1

      9885295271aa315d70b5afbdad4e9d48b2d7c0c5

    • SHA256

      1eebe4346f9ef87b9be5bae1875e17097501a28a201e2cf500df658a3727b47b

    • SHA512

      d4ed59e61ef5d9e718e2974a1b0896d50f22f6dfa39f990fe943a98b0648971f056bf0770999724e0fa28fa121c47ee6887c851e196c9dc60c6f88db042611b4

    • AgentTesla

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

    • AgentTesla Payload

    • ReZer0 packer

      Detects ReZer0, a packer with multiple versions used in various campaigns.

    • Checks computer location settings

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

    • 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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v6

Execution

Scheduled Task

1
T1053

Persistence

Scheduled Task

1
T1053

Privilege Escalation

Scheduled Task

1
T1053

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