General

  • Target

    fd565413e45099e35bd06f454d409680233829eb5ac98824226bdf1d2cf3345d

  • Size

    1.2MB

  • Sample

    220521-b74e3agdgj

  • MD5

    6fd689af8b78ff41fefbaf14e6d7f224

  • SHA1

    c3f00f9d5af1d2229e9364d587d144054124175a

  • SHA256

    fd565413e45099e35bd06f454d409680233829eb5ac98824226bdf1d2cf3345d

  • SHA512

    0c51e920ea844e9bebc802713933b7c9ce2d279e081eb362a8665df9cd1c995789d1cecb2866fb54f10241ea327b3e6625dcb7ec2278846c354aa6451b71236a

Malware Config

Extracted

Family

agenttesla

Credentials

  • Protocol:
    smtp
  • Host:
    mail.oltec.com.sg
  • Port:
    587
  • Username:
    jden@oltec.com.sg
  • Password:
    jden008989@$

Targets

    • Target

      PAYMENTR.EXE

    • Size

      482KB

    • MD5

      58b212d8fd89cd54104754fe0b9d26ad

    • SHA1

      2406e24eaf9f6711813ff12ff85ed51bb299ef4c

    • SHA256

      e9c5a3a5b00b7cccf4bb4f57ed7aed786d326ed8670bb4b7858d800a7d481148

    • SHA512

      85f873175f1afcf27f641e54d18bddd36e184d0868eb3b1cbe0788200097b49f23e7da4089d7696f56a03ca6ce66d3366ad517d5a707b51692c024e75d235cb4

    • AgentTesla

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

    • CoreEntity .NET Packer

      A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

    • 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